diff --git a/README.md b/README.md
index 69218f14cae78..2c248ea14064f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="https://github.com/doocs/leetcode"><img src="./images/leetcode-doocs.png" alt="LeetCode-GitHub-Doocs"></a>
+  <a href="https://github.com/doocs/leetcode"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/leetcode-doocs.png" alt="LeetCode-GitHub-Doocs"></a>
 </p>
 
 <p align="center">
@@ -166,7 +166,7 @@
 1. 你也可以参考帮助文档 https://help.github.com/cn 了解更多细节。
 
 <p align="center">
-  <a href="https://github.com/doocs/leetcode"><img src="./images/how-to-contribute.svg" alt="how-to-contribute"></a>
+  <a href="https://github.com/doocs/leetcode"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/how-to-contribute.svg" alt="how-to-contribute"></a>
 </p>
 
 [Gitpod.io](https://www.gitpod.io) 是一个免费的在线开发环境，你也可以使用它参与本项目。
@@ -200,7 +200,7 @@
 
 知名互联网科技博主 [@爱可可-爱生活](https://weibo.com/fly51fly) 微博推荐。
 
-<a href="https://weibo.com/fly51fly" target="_blank"><img src="./images/recommender-fly51fly.png"></a>
+<a href="https://weibo.com/fly51fly" target="_blank"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/recommender-fly51fly.png"></a>
 
 ## 许可证
 
diff --git a/README_EN.md b/README_EN.md
index 5d534772f22ed..def6ef1ba5686 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -1,5 +1,5 @@
 <p align="center">
-  <a href="https://github.com/doocs/leetcode"><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/images/leetcode-doocs.png" alt="LeetCode-GitHub-Doocs"></a>
+  <a href="https://github.com/doocs/leetcode"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/leetcode-doocs.png" alt="LeetCode-GitHub-Doocs"></a>
 </p>
 
 <p align="center">
@@ -160,7 +160,7 @@ I'm looking for long-term contributors/partners to this repo! Send me [PRs](http
 1. See [CONTRIBUTING](https://github.com/doocs/.github/blob/main/CONTRIBUTING.md) or [GitHub Help](https://help.github.com/en) for more details.
 
 <p align="center">
-  <a href="https://github.com/doocs/leetcode"><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/images/how-to-contribute.svg" alt="how-to-contribute"></a>
+  <a href="https://github.com/doocs/leetcode"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/how-to-contribute.svg" alt="how-to-contribute"></a>
 </p>
 
 You can also contribute to [doocs/leetcode](https://github.com/doocs/leetcode) using [Gitpod.io](https://www.gitpod.io), a free online dev environment with a single click.
@@ -171,7 +171,7 @@ You can also contribute to [doocs/leetcode](https://github.com/doocs/leetcode) u
 
 <a href="https://github.com/doocs/leetcode/stargazers" target="_blank"><img src="https://starchart.cc/doocs/leetcode.svg" alt="Stargazers over time" /></a>
 
-<!-- <a href="https://github.com/doocs/leetcode/stargazers" target="_blank"><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/images/starcharts.svg" alt="Stargazers over time" /></a> -->
+<!-- <a href="https://github.com/doocs/leetcode/stargazers" target="_blank"><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/images/starcharts.svg" alt="Stargazers over time" /></a> -->
 
 ## Contributors
 
diff --git a/index.html b/index.html
index f2a0b29306bf3..4314e3f9f34c5 100644
--- a/index.html
+++ b/index.html
@@ -10,8 +10,8 @@
   <meta name="description" content="LeetCode、剑指Offer、程序员面试金典题解">
   <meta name="viewport"
     content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/vue.css">
-  <link rel="stylesheet" href="//unpkg.com/docsify-darklight-theme@latest/dist/style.min.css">
+  <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/docsify/lib/themes/vue.css">
+  <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/docsify-darklight-theme@latest/dist/style.min.css">
   <link rel="icon" type="image/png" sizes="32x32" href="images/favicon-32x32.png">
   <link rel="icon" type="image/png" sizes="16x16" href="images/favicon-16x16.png">
   <style>
@@ -122,31 +122,37 @@
       ]
     }
   </script>
-  <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-c.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-go.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-sql.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-bash.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-cpp.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-json.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-java.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-kotlin.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-csharp.min.js"></script>
-  <script src="//unpkg.com/prismjs@1.15.0/components/prism-javascript.min.js"></script>
-  <script src="//unpkg.com/prismjs@1.15.0/components/prism-typescript.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-python.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-swift.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-nim.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-ruby.min.js"></script>
-  <script src="//unpkg.com/prismjs/components/prism-rust.min.js"></script>
-  <script src="//unpkg.com/docsify-copy-code@2.1.1/dist/docsify-copy-code.min.js"></script>
-  <script src="//unpkg.com/docsify/lib/plugins/search.min.js"></script>
-  <script src="//unpkg.com/docsify/lib/plugins/emoji.min.js"></script>
-  <script src="//unpkg.com/docsify/lib/plugins/zoom-image.min.js"></script>
-  <script src="//unpkg.com/docsify-tabs@1/dist/docsify-tabs.min.js"></script>
-  <script src="//unpkg.com/docsify-pagination/dist/docsify-pagination.min.js"></script>
-  <script src="//unpkg.com/docsify-darklight-theme@latest/dist/index.min.js"></script>
-  <script src="//unpkg.com/docsify-contributors@latest/dist/index.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify/lib/docsify.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-c.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-go.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-sql.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-bash.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-cpp.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-java.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-kotlin.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-csharp.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs@1.15.0/components/prism-javascript.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs@1.15.0/components/prism-typescript.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-python.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-swift.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-nim.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-ruby.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/prismjs/components/prism-rust.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify-copy-code@2.1.1/dist/docsify-copy-code.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify/lib/plugins/search.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify/lib/plugins/zoom-image.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify-tabs@1/dist/docsify-tabs.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify-pagination/dist/docsify-pagination.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify-darklight-theme@latest/dist/index.min.js"></script>
+  <script src="//fastly.jsdelivr.net/npm/docsify-contributors@latest/dist/index.min.js"></script>
 </body>
 
+<!-- 
+cdn.jsdelivr.net
+test1.jsdelivr.net
+testingcf.jsdelivr.net
+fastly.jsdelivr.net
+gcore.jsdelivr.net
+ -->
+
 </html>
\ No newline at end of file
diff --git a/lcci/02.04.Partition List/README.md b/lcci/02.04.Partition List/README.md
index a65659cd6bde5..1a89090fadf2d 100644
--- a/lcci/02.04.Partition List/README.md	
+++ b/lcci/02.04.Partition List/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcci/02.04.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcci/02.04.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
 
 <pre>
 <strong>输入：</strong>head = [1,4,3,2,5,2], x = 3
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23007. \351\207\215\345\273\272\344\272\214\345\217\211\346\240\221/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23007. \351\207\215\345\273\272\344\272\214\345\217\211\346\240\221/README.md"
index edb240e4dcfe8..188b4646ecffc 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23007. \351\207\215\345\273\272\344\272\214\345\217\211\346\240\221/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23007. \351\207\215\345\273\272\344\272\214\345\217\211\346\240\221/README.md"	
@@ -9,7 +9,7 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9807.%20%E9%87%8D%E5%BB%BA%E4%BA%8C%E5%8F%89%E6%A0%91/images/tree.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9807.%20%E9%87%8D%E5%BB%BA%E4%BA%8C%E5%8F%89%E6%A0%91/images/tree.jpg" />
 <pre>
 <strong>Input:</strong> preorder = [3,9,20,15,7], inorder = [9,3,15,20,7]
 <strong>Output:</strong> [3,9,20,null,null,15,7]
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23012. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\257\345\276\204/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23012. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\257\345\276\204/README.md"
index 5b24060343162..58995126e0bb9 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23012. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\257\345\276\204/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23012. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\257\345\276\204/README.md"	
@@ -10,7 +10,7 @@
 
 <p>例如，在下面的 3×4 的矩阵中包含单词 "ABCCED"（单词中的字母已标出）。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9812.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%AF%E5%BE%84/images/word2.jpg" style="width: 322px; height: 242px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9812.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%AF%E5%BE%84/images/word2.jpg" style="width: 322px; height: 242px;" /></p>
 
 <p> </p>
 
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23034. \344\272\214\345\217\211\346\240\221\344\270\255\345\222\214\344\270\272\346\237\220\344\270\200\345\200\274\347\232\204\350\267\257\345\276\204/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23034. \344\272\214\345\217\211\346\240\221\344\270\255\345\222\214\344\270\272\346\237\220\344\270\200\345\200\274\347\232\204\350\267\257\345\276\204/README.md"
index d50e779cb1a1c..1536658344965 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23034. \344\272\214\345\217\211\346\240\221\344\270\255\345\222\214\344\270\272\346\237\220\344\270\200\345\200\274\347\232\204\350\267\257\345\276\204/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23034. \344\272\214\345\217\211\346\240\221\344\270\255\345\222\214\344\270\272\346\237\220\344\270\200\345\200\274\347\232\204\350\267\257\345\276\204/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9834.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E4%B8%AD%E5%92%8C%E4%B8%BA%E6%9F%90%E4%B8%80%E5%80%BC%E7%9A%84%E8%B7%AF%E5%BE%84/images/pathsumii1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9834.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E4%B8%AD%E5%92%8C%E4%B8%BA%E6%9F%90%E4%B8%80%E5%80%BC%E7%9A%84%E8%B7%AF%E5%BE%84/images/pathsumii1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,4,8,11,null,13,4,7,2,null,null,5,1], targetSum = 22
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9834.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E4%B8%AD%E5%92%8C%E4%B8%BA%E6%9F%90%E4%B8%80%E5%80%BC%E7%9A%84%E8%B7%AF%E5%BE%84/images/pathsum2.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9834.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E4%B8%AD%E5%92%8C%E4%B8%BA%E6%9F%90%E4%B8%80%E5%80%BC%E7%9A%84%E8%B7%AF%E5%BE%84/images/pathsum2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3], targetSum = 5
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23035. \345\244\215\346\235\202\351\223\276\350\241\250\347\232\204\345\244\215\345\210\266/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23035. \345\244\215\346\235\202\351\223\276\350\241\250\347\232\204\345\244\215\345\210\266/README.md"
index bcc765e0c589f..512db0588da1e 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23035. \345\244\215\346\235\202\351\223\276\350\241\250\347\232\204\345\244\215\345\210\266/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23035. \345\244\215\346\235\202\351\223\276\350\241\250\347\232\204\345\244\215\345\210\266/README.md"	
@@ -10,7 +10,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e1.png"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e1.png"></p>
 
 <pre><strong>输入：</strong>head = [[7,null],[13,0],[11,4],[10,2],[1,0]]
 <strong>输出：</strong>[[7,null],[13,0],[11,4],[10,2],[1,0]]
@@ -18,7 +18,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e2.png"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e2.png"></p>
 
 <pre><strong>输入：</strong>head = [[1,1],[2,1]]
 <strong>输出：</strong>[[1,1],[2,1]]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e3.png"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9835.%20%E5%A4%8D%E6%9D%82%E9%93%BE%E8%A1%A8%E7%9A%84%E5%A4%8D%E5%88%B6/images/e3.png"></strong></p>
 
 <pre><strong>输入：</strong>head = [[3,null],[3,0],[3,null]]
 <strong>输出：</strong>[[3,null],[3,0],[3,null]]
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23036. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\216\345\217\214\345\220\221\351\223\276\350\241\250/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23036. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\216\345\217\214\345\220\221\351\223\276\350\241\250/README.md"
index bd34687188274..d346b7ac4c938 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23036. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\216\345\217\214\345\220\221\351\223\276\350\241\250/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23036. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\216\345\217\214\345\220\221\351\223\276\350\241\250/README.md"	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9836.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%8E%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/bstdlloriginalbst.png"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9836.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%8E%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/bstdlloriginalbst.png"></p>
 
 <p>&nbsp;</p>
 
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9836.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%8E%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/bstdllreturndll.png"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9836.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%8E%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/bstdllreturndll.png"></p>
 
 <p>&nbsp;</p>
 
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23037. \345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23037. \345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"
index 87ffb1bd17d42..6d32385df842c 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23037. \345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23037. \345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9837.%20%E5%BA%8F%E5%88%97%E5%8C%96%E4%BA%8C%E5%8F%89%E6%A0%91/images/serdeser.jpg" style="width: 442px; height: 324px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9837.%20%E5%BA%8F%E5%88%97%E5%8C%96%E4%BA%8C%E5%8F%89%E6%A0%91/images/serdeser.jpg" style="width: 442px; height: 324px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,null,4,5]
 <strong>输出：</strong>[1,2,3,null,null,4,5]
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23052. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\345\205\254\345\205\261\350\212\202\347\202\271/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23052. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\345\205\254\345\205\261\350\212\202\347\202\271/README.md"
index 19d02b69bed42..7f107f5c6adcc 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23052. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\345\205\254\345\205\261\350\212\202\347\202\271/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23052. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\345\205\254\345\205\261\350\212\202\347\202\271/README.md"	
@@ -6,7 +6,7 @@
 
 <p>如下面的两个链表<strong>：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_statement.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_statement.png" style="height: 130px; width: 400px;"></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_statement.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_statement.png" style="height: 130px; width: 400px;"></a></p>
 
 <p>在节点 c1 开始相交。</p>
 
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_1.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_1.png" style="height: 130px; width: 400px;"></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_1.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_1.png" style="height: 130px; width: 400px;"></a></p>
 
 <pre><strong>输入：</strong>intersectVal = 8, listA = [4,1,8,4,5], listB = [5,0,1,8,4,5], skipA = 2, skipB = 3
 <strong>输出：</strong>Reference of the node with value = 8
@@ -25,7 +25,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_2.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_2.png" style="height: 136px; width: 350px;"></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_2.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_2.png" style="height: 136px; width: 350px;"></a></p>
 
 <pre><strong>输入：</strong>intersectVal&nbsp;= 2, listA = [0,9,1,2,4], listB = [3,2,4], skipA = 3, skipB = 1
 <strong>输出：</strong>Reference of the node with value = 2
@@ -36,7 +36,7 @@
 
 <p><strong>示例&nbsp;3：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_3.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_3.png" style="height: 126px; width: 200px;"></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_3.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9852.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%85%AC%E5%85%B1%E8%8A%82%E7%82%B9/images/160_example_3.png" style="height: 126px; width: 200px;"></a></p>
 
 <pre><strong>输入：</strong>intersectVal = 0, listA = [2,6,4], listB = [1,5], skipA = 3, skipB = 2
 <strong>输出：</strong>null
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23068 - I. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23068 - I. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"
index 47edfb64e16b3..936e34c247a92 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23068 - I. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23068 - I. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"	
@@ -10,7 +10,7 @@
 
 <p>例如，给定如下二叉搜索树:&nbsp; root =&nbsp;[6,2,8,0,4,7,9,null,null,3,5]</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20I.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/images/binarysearchtree_improved.png"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20I.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/images/binarysearchtree_improved.png"></p>
 
 <p>&nbsp;</p>
 
diff --git "a/lcof/\351\235\242\350\257\225\351\242\23068 - II. \344\272\214\345\217\211\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md" "b/lcof/\351\235\242\350\257\225\351\242\23068 - II. \344\272\214\345\217\211\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"
index 22d8390426be3..d29340617610a 100644
--- "a/lcof/\351\235\242\350\257\225\351\242\23068 - II. \344\272\214\345\217\211\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"	
+++ "b/lcof/\351\235\242\350\257\225\351\242\23068 - II. \344\272\214\345\217\211\346\240\221\347\232\204\346\234\200\350\277\221\345\205\254\345\205\261\347\245\226\345\205\210/README.md"	
@@ -10,7 +10,7 @@
 
 <p>例如，给定如下二叉树:&nbsp; root =&nbsp;[3,5,1,6,2,0,8,null,null,7,4]</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20II.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/images/binarytree.png"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof/%E9%9D%A2%E8%AF%95%E9%A2%9868%20-%20II.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E8%BF%91%E5%85%AC%E5%85%B1%E7%A5%96%E5%85%88/images/binarytree.png"></p>
 
 <p>&nbsp;</p>
 
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"
index bf9bd42152a53..3e39ae5bf057e 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20013.%20%E4%BA%8C%E7%BB%B4%E5%AD%90%E7%9F%A9%E9%98%B5%E7%9A%84%E5%92%8C/images/1626332422-wUpUHT-image.png" style="width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20013.%20%E4%BA%8C%E7%BB%B4%E5%AD%90%E7%9F%A9%E9%98%B5%E7%9A%84%E5%92%8C/images/1626332422-wUpUHT-image.png" style="width: 200px;" /></p>
 
 <pre>
 <strong>输入:</strong>
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 021. \345\210\240\351\231\244\351\223\276\350\241\250\347\232\204\345\200\222\346\225\260\347\254\254 n \344\270\252\347\273\223\347\202\271/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 021. \345\210\240\351\231\244\351\223\276\350\241\250\347\232\204\345\200\222\346\225\260\347\254\254 n \344\270\252\347\273\223\347\202\271/README.md"
index d96b2d8b3baff..2ee890a05cc7c 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 021. \345\210\240\351\231\244\351\223\276\350\241\250\347\232\204\345\200\222\346\225\260\347\254\254 n \344\270\252\347\273\223\347\202\271/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 021. \345\210\240\351\231\244\351\223\276\350\241\250\347\232\204\345\200\222\346\225\260\347\254\254 n \344\270\252\347\273\223\347\202\271/README.md"	
@@ -10,7 +10,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20021.%20%E5%88%A0%E9%99%A4%E9%93%BE%E8%A1%A8%E7%9A%84%E5%80%92%E6%95%B0%E7%AC%AC%20n%20%E4%B8%AA%E7%BB%93%E7%82%B9/images/remove_ex1.jpg" style="width: 542px; height: 222px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20021.%20%E5%88%A0%E9%99%A4%E9%93%BE%E8%A1%A8%E7%9A%84%E5%80%92%E6%95%B0%E7%AC%AC%20n%20%E4%B8%AA%E7%BB%93%E7%82%B9/images/remove_ex1.jpg" style="width: 542px; height: 222px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], n = 2
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 022. \351\223\276\350\241\250\344\270\255\347\216\257\347\232\204\345\205\245\345\217\243\350\212\202\347\202\271/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 022. \351\223\276\350\241\250\344\270\255\347\216\257\347\232\204\345\205\245\345\217\243\350\212\202\347\202\271/README.md"
index 81fae91f0a196..b98c4f4861c7a 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 022. \351\223\276\350\241\250\344\270\255\347\216\257\347\232\204\345\205\245\345\217\243\350\212\202\347\202\271/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 022. \351\223\276\350\241\250\344\270\255\347\216\257\347\232\204\345\205\245\345\217\243\350\212\202\347\202\271/README.md"	
@@ -17,7 +17,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist.png" style="height: 97px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist.png" style="height: 97px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [3,2,0,-4], pos = 1
@@ -27,7 +27,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist_test2.png" style="height: 74px; width: 141px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist_test2.png" style="height: 74px; width: 141px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2], pos = 0
@@ -37,7 +37,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist_test3.png" style="height: 45px; width: 45px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20022.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%8E%AF%E7%9A%84%E5%85%A5%E5%8F%A3%E8%8A%82%E7%82%B9/images/circularlinkedlist_test3.png" style="height: 45px; width: 45px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1], pos = -1
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 023. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\351\207\215\345\220\210\350\212\202\347\202\271/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 023. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\351\207\215\345\220\210\350\212\202\347\202\271/README.md"
index 29c8d7db1d48a..137df18b158cd 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 023. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\351\207\215\345\220\210\350\212\202\347\202\271/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 023. \344\270\244\344\270\252\351\223\276\350\241\250\347\232\204\347\254\254\344\270\200\344\270\252\351\207\215\345\220\210\350\212\202\347\202\271/README.md"	
@@ -8,7 +8,7 @@
 
 <p>图示两个链表在节点 <code>c1</code> 开始相交<strong>：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_statement.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_statement.png" style="height: 130px; width: 400px;" /></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_statement.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_statement.png" style="height: 130px; width: 400px;" /></a></p>
 
 <p>题目数据 <strong>保证</strong> 整个链式结构中不存在环。</p>
 
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_1.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_1.png" style="height: 130px; width: 400px;" /></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_1.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_1.png" style="height: 130px; width: 400px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal = 8, listA = [4,1,8,4,5], listB = [5,0,1,8,4,5], skipA = 2, skipB = 3
@@ -30,7 +30,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_2.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_2.png" style="height: 136px; width: 350px;" /></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_2.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_2.png" style="height: 136px; width: 350px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal&nbsp;= 2, listA = [0,9,1,2,4], listB = [3,2,4], skipA = 3, skipB = 1
@@ -42,7 +42,7 @@
 
 <p><strong>示例&nbsp;3：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_3.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_3.png" style="height: 126px; width: 200px;" /></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_3.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20023.%20%E4%B8%A4%E4%B8%AA%E9%93%BE%E8%A1%A8%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E9%87%8D%E5%90%88%E8%8A%82%E7%82%B9/images/160_example_3.png" style="height: 126px; width: 200px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal = 0, listA = [2,6,4], listB = [1,5], skipA = 3, skipB = 2
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 024. \345\217\215\350\275\254\351\223\276\350\241\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 024. \345\217\215\350\275\254\351\223\276\350\241\250/README.md"
index bee676ecc787a..c315726863194 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 024. \345\217\215\350\275\254\351\223\276\350\241\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 024. \345\217\215\350\275\254\351\223\276\350\241\250/README.md"	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20024.%20%E5%8F%8D%E8%BD%AC%E9%93%BE%E8%A1%A8/images/rev1ex1.jpg" style="width: 302px; " />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20024.%20%E5%8F%8D%E8%BD%AC%E9%93%BE%E8%A1%A8/images/rev1ex1.jpg" style="width: 302px; " />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5]
 <strong>输出：</strong>[5,4,3,2,1]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20024.%20%E5%8F%8D%E8%BD%AC%E9%93%BE%E8%A1%A8/images/rev1ex2.jpg" style="width: 102px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20024.%20%E5%8F%8D%E8%BD%AC%E9%93%BE%E8%A1%A8/images/rev1ex2.jpg" style="width: 102px;" />
 <pre>
 <strong>输入：</strong>head = [1,2]
 <strong>输出：</strong>[2,1]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 025. \351\223\276\350\241\250\344\270\255\347\232\204\344\270\244\346\225\260\347\233\270\345\212\240/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 025. \351\223\276\350\241\250\344\270\255\347\232\204\344\270\244\346\225\260\347\233\270\345\212\240/README.md"
index 8f5c799f6f595..8bf8dfa0fdf3d 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 025. \351\223\276\350\241\250\344\270\255\347\232\204\344\270\244\346\225\260\347\233\270\345\212\240/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 025. \351\223\276\350\241\250\344\270\255\347\232\204\344\270\244\346\225\260\347\233\270\345\212\240/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20025.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E4%B8%A4%E6%95%B0%E7%9B%B8%E5%8A%A0/images/1626420025-fZfzMX-image.png" style="width: 302px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20025.%20%E9%93%BE%E8%A1%A8%E4%B8%AD%E7%9A%84%E4%B8%A4%E6%95%B0%E7%9B%B8%E5%8A%A0/images/1626420025-fZfzMX-image.png" style="width: 302px; " /></p>
 
 <pre>
 <strong>输入：</strong>l1 = [7,2,4,3], l2 = [5,6,4]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 026. \351\207\215\346\216\222\351\223\276\350\241\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 026. \351\207\215\346\216\222\351\223\276\350\241\250/README.md"
index 79a6801f7d93f..9c6f49f36139d 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 026. \351\207\215\346\216\222\351\223\276\350\241\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 026. \351\207\215\346\216\222\351\223\276\350\241\250/README.md"	
@@ -17,7 +17,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20026.%20%E9%87%8D%E6%8E%92%E9%93%BE%E8%A1%A8/images/1626420311-PkUiGI-image.png" style="width: 240px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20026.%20%E9%87%8D%E6%8E%92%E9%93%BE%E8%A1%A8/images/1626420311-PkUiGI-image.png" style="width: 240px; " /></p>
 
 <pre>
 <strong>输入: </strong>head = [1,2,3,4]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20026.%20%E9%87%8D%E6%8E%92%E9%93%BE%E8%A1%A8/images/1626420320-YUiulT-image.png" style="width: 320px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20026.%20%E9%87%8D%E6%8E%92%E9%93%BE%E8%A1%A8/images/1626420320-YUiulT-image.png" style="width: 320px; " /></p>
 
 <pre>
 <strong>输入: </strong>head = [1,2,3,4,5]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 027. \345\233\236\346\226\207\351\223\276\350\241\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 027. \345\233\236\346\226\207\351\223\276\350\241\250/README.md"
index a555ed736a082..660bac6ac76bd 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 027. \345\233\236\346\226\207\351\223\276\350\241\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 027. \345\233\236\346\226\207\351\223\276\350\241\250/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20027.%20%E5%9B%9E%E6%96%87%E9%93%BE%E8%A1%A8/images/1626421737-LjXceN-image.png" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20027.%20%E5%9B%9E%E6%96%87%E9%93%BE%E8%A1%A8/images/1626421737-LjXceN-image.png" /></strong></p>
 
 <pre>
 <strong>输入:</strong> head = [1,2,3,3,2,1]
@@ -20,7 +20,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20027.%20%E5%9B%9E%E6%96%87%E9%93%BE%E8%A1%A8/images/1626422231-wgvnWh-image.png" style="width: 138px; height: 62px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20027.%20%E5%9B%9E%E6%96%87%E9%93%BE%E8%A1%A8/images/1626422231-wgvnWh-image.png" style="width: 138px; height: 62px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> head = [1,2]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 028. \345\261\225\345\271\263\345\244\232\347\272\247\345\217\214\345\220\221\351\223\276\350\241\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 028. \345\261\225\345\271\263\345\244\232\347\272\247\345\217\214\345\220\221\351\223\276\350\241\250/README.md"
index 1445fb0161f05..9746270a2d7e6 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 028. \345\261\225\345\271\263\345\244\232\347\272\247\345\217\214\345\220\221\351\223\276\350\241\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 028. \345\261\225\345\271\263\345\244\232\347\272\247\345\217\214\345\220\221\351\223\276\350\241\250/README.md"	
@@ -19,11 +19,11 @@
 </strong>
 输入的多级列表如下图所示：
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20028.%20%E5%B1%95%E5%B9%B3%E5%A4%9A%E7%BA%A7%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/multilevellinkedlist.png" style="height: 363px; width: 640px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20028.%20%E5%B1%95%E5%B9%B3%E5%A4%9A%E7%BA%A7%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/multilevellinkedlist.png" style="height: 363px; width: 640px;" />
 
 扁平化后的链表如下图：
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20028.%20%E5%B1%95%E5%B9%B3%E5%A4%9A%E7%BA%A7%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/multilevellinkedlistflattened.png" style="height: 80px; width: 1100px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20028.%20%E5%B1%95%E5%B9%B3%E5%A4%9A%E7%BA%A7%E5%8F%8C%E5%90%91%E9%93%BE%E8%A1%A8/images/multilevellinkedlistflattened.png" style="height: 80px; width: 1100px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 029. \346\216\222\345\272\217\347\232\204\345\276\252\347\216\257\351\223\276\350\241\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 029. \346\216\222\345\272\217\347\232\204\345\276\252\347\216\257\351\223\276\350\241\250/README.md"
index 1068078a599b7..9fd9fc692436b 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 029. \346\216\222\345\272\217\347\232\204\345\276\252\347\216\257\351\223\276\350\241\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 029. \346\216\222\345\272\217\347\232\204\345\276\252\347\216\257\351\223\276\350\241\250/README.md"	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20029.%20%E6%8E%92%E5%BA%8F%E7%9A%84%E5%BE%AA%E7%8E%AF%E9%93%BE%E8%A1%A8/images/example_1_before_65p.jpg" style="height: 149px; width: 250px;" /><br />
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20029.%20%E6%8E%92%E5%BA%8F%E7%9A%84%E5%BE%AA%E7%8E%AF%E9%93%BE%E8%A1%A8/images/example_1_before_65p.jpg" style="height: 149px; width: 250px;" /><br />
 &nbsp;</p>
 
 <pre>
@@ -24,7 +24,7 @@
 <strong>输出：</strong>[3,4,1,2]
 <strong>解释：</strong>在上图中，有一个包含三个元素的循环有序列表，你获得值为 3 的节点的指针，我们需要向表中插入元素 2 。新插入的节点应该在 1 和 3 之间，插入之后，整个列表如上图所示，最后返回节点 3 。
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20029.%20%E6%8E%92%E5%BA%8F%E7%9A%84%E5%BE%AA%E7%8E%AF%E9%93%BE%E8%A1%A8/images/example_1_after_65p.jpg" style="height: 149px; width: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20029.%20%E6%8E%92%E5%BA%8F%E7%9A%84%E5%BE%AA%E7%8E%AF%E9%93%BE%E8%A1%A8/images/example_1_after_65p.jpg" style="height: 149px; width: 250px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 039. \347\233\264\346\226\271\345\233\276\346\234\200\345\244\247\347\237\251\345\275\242\351\235\242\347\247\257/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 039. \347\233\264\346\226\271\345\233\276\346\234\200\345\244\247\347\237\251\345\275\242\351\235\242\347\247\257/README.md"
index a842ba493efc3..02396d80033b4 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 039. \347\233\264\346\226\271\345\233\276\346\234\200\345\244\247\347\237\251\345\275\242\351\235\242\347\247\257/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 039. \347\233\264\346\226\271\345\233\276\346\234\200\345\244\247\347\237\251\345\275\242\351\235\242\347\247\257/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20039.%20%E7%9B%B4%E6%96%B9%E5%9B%BE%E6%9C%80%E5%A4%A7%E7%9F%A9%E5%BD%A2%E9%9D%A2%E7%A7%AF/images/histogram.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20039.%20%E7%9B%B4%E6%96%B9%E5%9B%BE%E6%9C%80%E5%A4%A7%E7%9F%A9%E5%BD%A2%E9%9D%A2%E7%A7%AF/images/histogram.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>heights = [2,1,5,6,2,3]
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20039.%20%E7%9B%B4%E6%96%B9%E5%9B%BE%E6%9C%80%E5%A4%A7%E7%9F%A9%E5%BD%A2%E9%9D%A2%E7%A7%AF/images/histogram-1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20039.%20%E7%9B%B4%E6%96%B9%E5%9B%BE%E6%9C%80%E5%A4%A7%E7%9F%A9%E5%BD%A2%E9%9D%A2%E7%A7%AF/images/histogram-1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong> heights = [2,4]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 040. \347\237\251\351\230\265\344\270\255\346\234\200\345\244\247\347\232\204\347\237\251\345\275\242/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 040. \347\237\251\351\230\265\344\270\255\346\234\200\345\244\247\347\232\204\347\237\251\345\275\242/README.md"
index 776a17884e278..b1aa65aea655f 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 040. \347\237\251\351\230\265\344\270\255\346\234\200\345\244\247\347\232\204\347\237\251\345\275\242/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 040. \347\237\251\351\230\265\344\270\255\346\234\200\345\244\247\347\232\204\347\237\251\345\275\242/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20040.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E6%9C%80%E5%A4%A7%E7%9A%84%E7%9F%A9%E5%BD%A2/images/maximal.jpg" style="width: 402px; height: 322px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20040.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E6%9C%80%E5%A4%A7%E7%9A%84%E7%9F%A9%E5%BD%A2/images/maximal.jpg" style="width: 402px; height: 322px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = ["10100","10111","11111","10010"]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 045. \344\272\214\345\217\211\346\240\221\346\234\200\345\272\225\345\261\202\346\234\200\345\267\246\350\276\271\347\232\204\345\200\274/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 045. \344\272\214\345\217\211\346\240\221\346\234\200\345\272\225\345\261\202\346\234\200\345\267\246\350\276\271\347\232\204\345\200\274/README.md"
index cd10a7b11fc99..c7578a14eea92 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 045. \344\272\214\345\217\211\346\240\221\346\234\200\345\272\225\345\261\202\346\234\200\345\267\246\350\276\271\347\232\204\345\200\274/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 045. \344\272\214\345\217\211\346\240\221\346\234\200\345\272\225\345\261\202\346\234\200\345\267\246\350\276\271\347\232\204\345\200\274/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20045.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E6%9C%80%E5%BA%95%E5%B1%82%E6%9C%80%E5%B7%A6%E8%BE%B9%E7%9A%84%E5%80%BC/images/tree1.jpg" style="width: 182px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20045.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E6%9C%80%E5%BA%95%E5%B1%82%E6%9C%80%E5%B7%A6%E8%BE%B9%E7%9A%84%E5%80%BC/images/tree1.jpg" style="width: 182px; " /></p>
 
 <pre>
 <strong>输入: </strong>root = [2,1,3]
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2: </strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20045.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E6%9C%80%E5%BA%95%E5%B1%82%E6%9C%80%E5%B7%A6%E8%BE%B9%E7%9A%84%E5%80%BC/images/tree2.jpg" style="width: 242px; " /><strong> </strong></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20045.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E6%9C%80%E5%BA%95%E5%B1%82%E6%9C%80%E5%B7%A6%E8%BE%B9%E7%9A%84%E5%80%BC/images/tree2.jpg" style="width: 242px; " /><strong> </strong></p>
 
 <pre>
 <strong>输入: </strong>[1,2,3,4,null,5,6,null,null,7]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 046. \344\272\214\345\217\211\346\240\221\347\232\204\345\217\263\344\276\247\350\247\206\345\233\276/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 046. \344\272\214\345\217\211\346\240\221\347\232\204\345\217\263\344\276\247\350\247\206\345\233\276/README.md"
index 196e8b4fa02f3..27a645cad2603 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 046. \344\272\214\345\217\211\346\240\221\347\232\204\345\217\263\344\276\247\350\247\206\345\233\276/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 046. \344\272\214\345\217\211\346\240\221\347\232\204\345\217\263\344\276\247\350\247\206\345\233\276/README.md"	
@@ -10,7 +10,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20046.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%8F%B3%E4%BE%A7%E8%A7%86%E5%9B%BE/images/tree.jpg" style="width: 270px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20046.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%8F%B3%E4%BE%A7%E8%A7%86%E5%9B%BE/images/tree.jpg" style="width: 270px; " /></p>
 
 <pre>
 <strong>输入:</strong>&nbsp;[1,2,3,null,5,null,4]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 047. \344\272\214\345\217\211\346\240\221\345\211\252\346\236\235/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 047. \344\272\214\345\217\211\346\240\221\345\211\252\346\236\235/README.md"
index fe9eeca6162a6..373924950623f 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 047. \344\272\214\345\217\211\346\240\221\345\211\252\346\236\235/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 047. \344\272\214\345\217\211\346\240\221\345\211\252\346\236\235/README.md"	
@@ -19,7 +19,7 @@
 只有红色节点满足条件&ldquo;所有不包含 1 的子树&rdquo;。
 右图为返回的答案。
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028_2.png" style="width:450px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028_2.png" style="width:450px" />
 </pre>
 
 <p><strong>示例 2:</strong></p>
@@ -29,7 +29,7 @@
 <strong>输出: </strong>[1,null,1,null,1]
 <strong>解释:</strong>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028_1.png" style="width:450px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028_1.png" style="width:450px" />
 </pre>
 
 <p><strong>示例 3:</strong></p>
@@ -39,7 +39,7 @@
 <strong>输出: </strong>[1,1,0,1,1,null,1]
 <strong>解释:</strong>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028.png" style="width:450px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20047.%20%E4%BA%8C%E5%8F%89%E6%A0%91%E5%89%AA%E6%9E%9D/images/1028.png" style="width:450px" />
 </pre>
 
 <p>&nbsp;</p>
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 048. \345\272\217\345\210\227\345\214\226\344\270\216\345\217\215\345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 048. \345\272\217\345\210\227\345\214\226\344\270\216\345\217\215\345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"
index 605665ec48a9f..4a8ad699f498b 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 048. \345\272\217\345\210\227\345\214\226\344\270\216\345\217\215\345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 048. \345\272\217\345\210\227\345\214\226\344\270\216\345\217\215\345\272\217\345\210\227\345\214\226\344\272\214\345\217\211\346\240\221/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20048.%20%E5%BA%8F%E5%88%97%E5%8C%96%E4%B8%8E%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%E4%BA%8C%E5%8F%89%E6%A0%91/images/serdeser.jpg" style="width: 442px; height: 324px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20048.%20%E5%BA%8F%E5%88%97%E5%8C%96%E4%B8%8E%E5%8F%8D%E5%BA%8F%E5%88%97%E5%8C%96%E4%BA%8C%E5%8F%89%E6%A0%91/images/serdeser.jpg" style="width: 442px; height: 324px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,null,4,5]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 049. \344\273\216\346\240\271\350\212\202\347\202\271\345\210\260\345\217\266\350\212\202\347\202\271\347\232\204\350\267\257\345\276\204\346\225\260\345\255\227\344\271\213\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 049. \344\273\216\346\240\271\350\212\202\347\202\271\345\210\260\345\217\266\350\212\202\347\202\271\347\232\204\350\267\257\345\276\204\346\225\260\345\255\227\344\271\213\345\222\214/README.md"
index a5cf8a2e5185b..f1cc8e378aaa1 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 049. \344\273\216\346\240\271\350\212\202\347\202\271\345\210\260\345\217\266\350\212\202\347\202\271\347\232\204\350\267\257\345\276\204\346\225\260\345\255\227\344\271\213\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 049. \344\273\216\346\240\271\350\212\202\347\202\271\345\210\260\345\217\266\350\212\202\347\202\271\347\232\204\350\267\257\345\276\204\346\225\260\345\255\227\344\271\213\345\222\214/README.md"	
@@ -21,7 +21,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20049.%20%E4%BB%8E%E6%A0%B9%E8%8A%82%E7%82%B9%E5%88%B0%E5%8F%B6%E8%8A%82%E7%82%B9%E7%9A%84%E8%B7%AF%E5%BE%84%E6%95%B0%E5%AD%97%E4%B9%8B%E5%92%8C/images/num1tree.jpg" style="width: 212px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20049.%20%E4%BB%8E%E6%A0%B9%E8%8A%82%E7%82%B9%E5%88%B0%E5%8F%B6%E8%8A%82%E7%82%B9%E7%9A%84%E8%B7%AF%E5%BE%84%E6%95%B0%E5%AD%97%E4%B9%8B%E5%92%8C/images/num1tree.jpg" style="width: 212px; height: 182px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3]
 <strong>输出：</strong>25
@@ -31,7 +31,7 @@
 因此，数字总和 = 12 + 13 = <code>25</code></pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20049.%20%E4%BB%8E%E6%A0%B9%E8%8A%82%E7%82%B9%E5%88%B0%E5%8F%B6%E8%8A%82%E7%82%B9%E7%9A%84%E8%B7%AF%E5%BE%84%E6%95%B0%E5%AD%97%E4%B9%8B%E5%92%8C/images/num2tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20049.%20%E4%BB%8E%E6%A0%B9%E8%8A%82%E7%82%B9%E5%88%B0%E5%8F%B6%E8%8A%82%E7%82%B9%E7%9A%84%E8%B7%AF%E5%BE%84%E6%95%B0%E5%AD%97%E4%B9%8B%E5%92%8C/images/num2tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [4,9,0,5,1]
 <strong>输出：</strong>1026
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 050. \345\220\221\344\270\213\347\232\204\350\267\257\345\276\204\350\212\202\347\202\271\344\271\213\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 050. \345\220\221\344\270\213\347\232\204\350\267\257\345\276\204\350\212\202\347\202\271\344\271\213\345\222\214/README.md"
index 09b361643687f..93495f00210c7 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 050. \345\220\221\344\270\213\347\232\204\350\267\257\345\276\204\350\212\202\347\202\271\344\271\213\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 050. \345\220\221\344\270\213\347\232\204\350\267\257\345\276\204\350\212\202\347\202\271\344\271\213\345\222\214/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20050.%20%E5%90%91%E4%B8%8B%E7%9A%84%E8%B7%AF%E5%BE%84%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C/images/pathsum3-1-tree.jpg" style="width: 452px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20050.%20%E5%90%91%E4%B8%8B%E7%9A%84%E8%B7%AF%E5%BE%84%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C/images/pathsum3-1-tree.jpg" style="width: 452px; " /></p>
 
 <pre>
 <strong>输入：</strong>root = [10,5,-3,3,2,null,11,3,-2,null,1], targetSum = 8
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 051. \350\212\202\347\202\271\344\271\213\345\222\214\346\234\200\345\244\247\347\232\204\350\267\257\345\276\204/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 051. \350\212\202\347\202\271\344\271\213\345\222\214\346\234\200\345\244\247\347\232\204\350\267\257\345\276\204/README.md"
index 03c035d6539c4..74c275980f68a 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 051. \350\212\202\347\202\271\344\271\213\345\222\214\346\234\200\345\244\247\347\232\204\350\267\257\345\276\204/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 051. \350\212\202\347\202\271\344\271\213\345\222\214\346\234\200\345\244\247\347\232\204\350\267\257\345\276\204/README.md"	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20051.%20%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C%E6%9C%80%E5%A4%A7%E7%9A%84%E8%B7%AF%E5%BE%84/images/exx1.jpg" style="width: 322px; height: 182px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20051.%20%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C%E6%9C%80%E5%A4%A7%E7%9A%84%E8%B7%AF%E5%BE%84/images/exx1.jpg" style="width: 322px; height: 182px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20051.%20%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C%E6%9C%80%E5%A4%A7%E7%9A%84%E8%B7%AF%E5%BE%84/images/exx2.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20051.%20%E8%8A%82%E7%82%B9%E4%B9%8B%E5%92%8C%E6%9C%80%E5%A4%A7%E7%9A%84%E8%B7%AF%E5%BE%84/images/exx2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [-10,9,20,null,null,15,7]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 052. \345\261\225\345\271\263\344\272\214\345\217\211\346\220\234\347\264\242\346\240\221/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 052. \345\261\225\345\271\263\344\272\214\345\217\211\346\220\234\347\264\242\346\240\221/README.md"
index bbe05d4e4f5b4..eb8e6cef9296b 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 052. \345\261\225\345\271\263\344\272\214\345\217\211\346\220\234\347\264\242\346\240\221/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 052. \345\261\225\345\271\263\344\272\214\345\217\211\346\220\234\347\264\242\346\240\221/README.md"	
@@ -10,7 +10,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20052.%20%E5%B1%95%E5%B9%B3%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91/images/ex1.jpg" style="width: 600px; height: 350px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20052.%20%E5%B1%95%E5%B9%B3%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91/images/ex1.jpg" style="width: 600px; height: 350px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,8,1,null,null,null,7,9]
@@ -19,7 +19,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20052.%20%E5%B1%95%E5%B9%B3%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91/images/ex2.jpg" style="width: 300px; height: 114px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20052.%20%E5%B1%95%E5%B9%B3%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91/images/ex2.jpg" style="width: 300px; height: 114px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,1,7]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 053. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\255\347\232\204\344\270\255\345\272\217\345\220\216\347\273\247/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 053. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\255\347\232\204\344\270\255\345\272\217\345\220\216\347\273\247/README.md"
index ac6373c7d3ff8..3b55f0fc30780 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 053. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\255\347\232\204\344\270\255\345\272\217\345\220\216\347\273\247/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 053. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\344\270\255\347\232\204\344\270\255\345\272\217\345\220\216\347\273\247/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20053.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E4%B8%AD%E5%BA%8F%E5%90%8E%E7%BB%A7/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20053.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E4%B8%AD%E5%BA%8F%E5%90%8E%E7%BB%A7/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,1,3], p = 1
@@ -22,7 +22,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20053.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E4%B8%AD%E5%BA%8F%E5%90%8E%E7%BB%A7/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20053.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E4%B8%AD%E7%9A%84%E4%B8%AD%E5%BA%8F%E5%90%8E%E7%BB%A7/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,null,1], p = 6
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 054. \346\211\200\346\234\211\345\244\247\344\272\216\347\255\211\344\272\216\350\212\202\347\202\271\347\232\204\345\200\274\344\271\213\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 054. \346\211\200\346\234\211\345\244\247\344\272\216\347\255\211\344\272\216\350\212\202\347\202\271\347\232\204\345\200\274\344\271\213\345\222\214/README.md"
index aad8ad9676aaa..6c28d31eba7c0 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 054. \346\211\200\346\234\211\345\244\247\344\272\216\347\255\211\344\272\216\350\212\202\347\202\271\347\232\204\345\200\274\344\271\213\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 054. \346\211\200\346\234\211\345\244\247\344\272\216\347\255\211\344\272\216\350\212\202\347\202\271\347\232\204\345\200\274\344\271\213\345\222\214/README.md"	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20054.%20%E6%89%80%E6%9C%89%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E%E8%8A%82%E7%82%B9%E7%9A%84%E5%80%BC%E4%B9%8B%E5%92%8C/images/tree.png" style="height: 364px; width: 534px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20054.%20%E6%89%80%E6%9C%89%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E%E8%8A%82%E7%82%B9%E7%9A%84%E5%80%BC%E4%B9%8B%E5%92%8C/images/tree.png" style="height: 364px; width: 534px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root<strong> </strong>=<strong> </strong>[4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 055. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\350\277\255\344\273\243\345\231\250/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 055. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\350\277\255\344\273\243\345\231\250/README.md"
index ef5cb4b43322a..da8fe2aee41ea 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 055. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\350\277\255\344\273\243\345\231\250/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 055. \344\272\214\345\217\211\346\220\234\347\264\242\346\240\221\350\277\255\344\273\243\345\231\250/README.md"	
@@ -24,7 +24,7 @@
 
 <p><strong>示例：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20055.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E8%BF%AD%E4%BB%A3%E5%99%A8/images/bst-tree.png" style="width: 189px; height: 178px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20055.%20%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E8%BF%AD%E4%BB%A3%E5%99%A8/images/bst-tree.png" style="width: 189px; height: 178px;" /></p>
 
 <pre>
 <strong>输入</strong>
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 077. \351\223\276\350\241\250\346\216\222\345\272\217/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 077. \351\223\276\350\241\250\346\216\222\345\272\217/README.md"
index 3c1c0ae6ad83b..8f8a507aab166 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 077. \351\223\276\350\241\250\346\216\222\345\272\217/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 077. \351\223\276\350\241\250\346\216\222\345\272\217/README.md"	
@@ -13,7 +13,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20077.%20%E9%93%BE%E8%A1%A8%E6%8E%92%E5%BA%8F/images/sort_list_1.jpg" style="width: 302px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20077.%20%E9%93%BE%E8%A1%A8%E6%8E%92%E5%BA%8F/images/sort_list_1.jpg" style="width: 302px; " /></p>
 
 <pre>
 <b>输入：</b>head = [4,2,1,3]
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20077.%20%E9%93%BE%E8%A1%A8%E6%8E%92%E5%BA%8F/images/sort_list_2.jpg" style="width: 402px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20077.%20%E9%93%BE%E8%A1%A8%E6%8E%92%E5%BA%8F/images/sort_list_2.jpg" style="width: 402px; " /></p>
 
 <pre>
 <b>输入：</b>head = [-1,5,3,4,0]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 095. \346\234\200\351\225\277\345\205\254\345\205\261\345\255\220\345\272\217\345\210\227/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 095. \346\234\200\351\225\277\345\205\254\345\205\261\345\255\220\345\272\217\345\210\227/README.md"
index 7e6fb45f45a85..625faf080cbfb 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 095. \346\234\200\351\225\277\345\205\254\345\205\261\345\255\220\345\272\217\345\210\227/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 095. \346\234\200\351\225\277\345\205\254\345\205\261\345\255\220\345\272\217\345\210\227/README.md"	
@@ -63,7 +63,7 @@
 
 递推公式如下：
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/剑指%20Offer%20II%20095.%20最长公共子序列/images/gif.gif)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/剑指%20Offer%20II%20095.%20最长公共子序列/images/gif.gif)
 
 时间复杂度 O(mn)。
 
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 096. \345\255\227\347\254\246\344\270\262\344\272\244\347\273\207/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 096. \345\255\227\347\254\246\344\270\262\344\272\244\347\273\207/README.md"
index 37f9a8bbd6829..7c5d18f3e49e5 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 096. \345\255\227\347\254\246\344\270\262\344\272\244\347\273\207/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 096. \345\255\227\347\254\246\344\270\262\344\272\244\347\273\207/README.md"	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20096.%20%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%BA%A4%E7%BB%87/images/interleave.jpg" style="width: 561px; height: 203px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20096.%20%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%BA%A4%E7%BB%87/images/interleave.jpg" style="width: 561px; height: 203px;" /></p>
 
 <pre>
 <strong>输入：</strong>s1 = &quot;aabcc&quot;, s2 = &quot;dbbca&quot;, s3 = &quot;aadbbcbcac&quot;
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 098. \350\267\257\345\276\204\347\232\204\346\225\260\347\233\256/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 098. \350\267\257\345\276\204\347\232\204\346\225\260\347\233\256/README.md"
index 7539b1975c972..4c2883a4da29c 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 098. \350\267\257\345\276\204\347\232\204\346\225\260\347\233\256/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 098. \350\267\257\345\276\204\347\232\204\346\225\260\347\233\256/README.md"	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20098.%20%E8%B7%AF%E5%BE%84%E7%9A%84%E6%95%B0%E7%9B%AE/images/robot_maze.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20098.%20%E8%B7%AF%E5%BE%84%E7%9A%84%E6%95%B0%E7%9B%AE/images/robot_maze.png" /></p>
 
 <pre>
 <strong>输入：</strong>m = 3, n = 7
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 099. \346\234\200\345\260\217\350\267\257\345\276\204\344\271\213\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 099. \346\234\200\345\260\217\350\267\257\345\276\204\344\271\213\345\222\214/README.md"
index 745fdda4648a8..c8e2054797882 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 099. \346\234\200\345\260\217\350\267\257\345\276\204\344\271\213\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 099. \346\234\200\345\260\217\350\267\257\345\276\204\344\271\213\345\222\214/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20099.%20%E6%9C%80%E5%B0%8F%E8%B7%AF%E5%BE%84%E4%B9%8B%E5%92%8C/images/minpath.jpg" style="width: 242px; height: 242px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20099.%20%E6%9C%80%E5%B0%8F%E8%B7%AF%E5%BE%84%E4%B9%8B%E5%92%8C/images/minpath.jpg" style="width: 242px; height: 242px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,3,1],[1,5,1],[4,2,1]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 105. \345\262\233\345\261\277\347\232\204\346\234\200\345\244\247\351\235\242\347\247\257/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 105. \345\262\233\345\261\277\347\232\204\346\234\200\345\244\247\351\235\242\347\247\257/README.md"
index ddcf6fc9ab100..aae90f11072c1 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 105. \345\262\233\345\261\277\347\232\204\346\234\200\345\244\247\351\235\242\347\247\257/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 105. \345\262\233\345\261\277\347\232\204\346\234\200\345\244\247\351\235\242\347\247\257/README.md"	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20105.%20%E5%B2%9B%E5%B1%BF%E7%9A%84%E6%9C%80%E5%A4%A7%E9%9D%A2%E7%A7%AF/images/1626667010-nSGPXz-image.png" style="width: 452px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20105.%20%E5%B2%9B%E5%B1%BF%E7%9A%84%E6%9C%80%E5%A4%A7%E9%9D%A2%E7%A7%AF/images/1626667010-nSGPXz-image.png" style="width: 452px; " /></p>
 
 <pre>
 <strong>输入: </strong>grid = [[0,0,1,0,0,0,0,1,0,0,0,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,1,1,0,1,0,0,0,0,0,0,0,0],[0,1,0,0,1,1,0,0,1,0,1,0,0],[0,1,0,0,1,1,0,0,1,1,1,0,0],[0,0,0,0,0,0,0,0,0,0,1,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,0,0,0,0,0,0,1,1,0,0,0,0]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 106. \344\272\214\345\210\206\345\233\276/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 106. \344\272\214\345\210\206\345\233\276/README.md"
index f53915e1c5f74..e2f149242208c 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 106. \344\272\214\345\210\206\345\233\276/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 106. \344\272\214\345\210\206\345\233\276/README.md"	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20106.%20%E4%BA%8C%E5%88%86%E5%9B%BE/images/bi2.jpg" style="width: 222px; height: 222px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20106.%20%E4%BA%8C%E5%88%86%E5%9B%BE/images/bi2.jpg" style="width: 222px; height: 222px;" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1,2,3],[0,2],[0,1,3],[0,2]]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20106.%20%E4%BA%8C%E5%88%86%E5%9B%BE/images/bi1.jpg" style="width: 222px; height: 222px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20106.%20%E4%BA%8C%E5%88%86%E5%9B%BE/images/bi1.jpg" style="width: 222px; height: 222px;" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1,3],[0,2],[1,3],[0,2]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 107. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\235\347\246\273/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 107. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\235\347\246\273/README.md"
index fa861f706b7f0..a5de0b79804d9 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 107. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\235\347\246\273/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 107. \347\237\251\351\230\265\344\270\255\347\232\204\350\267\235\347\246\273/README.md"	
@@ -12,7 +12,7 @@
 
 <p><b>示例 1：</b></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20107.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%9D%E7%A6%BB/images/1626667201-NCWmuP-image.png" style="width: 150px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20107.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%9D%E7%A6%BB/images/1626667201-NCWmuP-image.png" style="width: 150px; " /></p>
 
 <pre>
 <strong>输入：</strong>mat =<strong> </strong>[[0,0,0],[0,1,0],[0,0,0]]
@@ -21,7 +21,7 @@
 
 <p><b>示例 2：</b></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20107.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%9D%E7%A6%BB/images/1626667205-xFxIeK-image.png" style="width: 150px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20107.%20%E7%9F%A9%E9%98%B5%E4%B8%AD%E7%9A%84%E8%B7%9D%E7%A6%BB/images/1626667205-xFxIeK-image.png" style="width: 150px; " /></p>
 
 <pre>
 <b>输入：</b>mat =<b> </b>[[0,0,0],[0,1,0],[1,1,1]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 110. \346\211\200\346\234\211\350\267\257\345\276\204/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 110. \346\211\200\346\234\211\350\267\257\345\276\204/README.md"
index c0788858cb993..77785f2ff9c88 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 110. \346\211\200\346\234\211\350\267\257\345\276\204/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 110. \346\211\200\346\234\211\350\267\257\345\276\204/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20110.%20%E6%89%80%E6%9C%89%E8%B7%AF%E5%BE%84/images/all_1.jpg" style="height: 242px; width: 242px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20110.%20%E6%89%80%E6%9C%89%E8%B7%AF%E5%BE%84/images/all_1.jpg" style="height: 242px; width: 242px;" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1,2],[3],[3],[]]
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20110.%20%E6%89%80%E6%9C%89%E8%B7%AF%E5%BE%84/images/all_2.jpg" style="height: 301px; width: 423px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20110.%20%E6%89%80%E6%9C%89%E8%B7%AF%E5%BE%84/images/all_2.jpg" style="height: 301px; width: 423px;" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[4,3,1],[3,2,4],[3],[4],[]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 112. \346\234\200\351\225\277\351\200\222\345\242\236\350\267\257\345\276\204/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 112. \346\234\200\351\225\277\351\200\222\345\242\236\350\267\257\345\276\204/README.md"
index c0ece5ff33849..afa724d6c75b8 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 112. \346\234\200\351\225\277\351\200\222\345\242\236\350\267\257\345\276\204/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 112. \346\234\200\351\225\277\351\200\222\345\242\236\350\267\257\345\276\204/README.md"	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20112.%20%E6%9C%80%E9%95%BF%E9%80%92%E5%A2%9E%E8%B7%AF%E5%BE%84/images/grid1.jpg" style="width: 242px; height: 242px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20112.%20%E6%9C%80%E9%95%BF%E9%80%92%E5%A2%9E%E8%B7%AF%E5%BE%84/images/grid1.jpg" style="width: 242px; height: 242px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[9,9,4],[6,6,8],[2,1,1]]
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20112.%20%E6%9C%80%E9%95%BF%E9%80%92%E5%A2%9E%E8%B7%AF%E5%BE%84/images/tmp-grid.jpg" style="width: 253px; height: 253px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20112.%20%E6%9C%80%E9%95%BF%E9%80%92%E5%A2%9E%E8%B7%AF%E5%BE%84/images/tmp-grid.jpg" style="width: 253px; height: 253px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[3,4,5],[3,2,6],[2,2,1]]
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 116. \346\234\213\345\217\213\345\234\210/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 116. \346\234\213\345\217\213\345\234\210/README.md"
index f9fdd73879e8d..764e762a78b4c 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 116. \346\234\213\345\217\213\345\234\210/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 116. \346\234\213\345\217\213\345\234\210/README.md"	
@@ -16,14 +16,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20116.%20%E6%9C%8B%E5%8F%8B%E5%9C%88/images/graph1.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20116.%20%E6%9C%8B%E5%8F%8B%E5%9C%88/images/graph1.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>输入：</strong><code>isConnected</code> = [[1,1,0],[1,1,0],[0,0,1]]
 <strong>输出：</strong>2
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20116.%20%E6%9C%8B%E5%8F%8B%E5%9C%88/images/graph2.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20116.%20%E6%9C%8B%E5%8F%8B%E5%9C%88/images/graph2.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>输入：</strong><code>isConnected</code><strong> </strong>= [[1,0,0],[0,1,0],[0,0,1]]
 <strong>输出：</strong>3
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 118. \345\244\232\344\275\231\347\232\204\350\276\271/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 118. \345\244\232\344\275\231\347\232\204\350\276\271/README.md"
index 4e0ca33664ca9..b7c38a0cb2b02 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 118. \345\244\232\344\275\231\347\232\204\350\276\271/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 118. \345\244\232\344\275\231\347\232\204\350\276\271/README.md"	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20118.%20%E5%A4%9A%E4%BD%99%E7%9A%84%E8%BE%B9/images/1626676174-hOEVUL-image.png" style="width: 152px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20118.%20%E5%A4%9A%E4%BD%99%E7%9A%84%E8%BE%B9/images/1626676174-hOEVUL-image.png" style="width: 152px; " /></p>
 
 <pre>
 <strong>输入:</strong> edges = [[1,2],[1,3],[2,3]]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20118.%20%E5%A4%9A%E4%BD%99%E7%9A%84%E8%BE%B9/images/1626676179-kGxcmu-image.png" style="width: 250px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcof2/%E5%89%91%E6%8C%87%20Offer%20II%20118.%20%E5%A4%9A%E4%BD%99%E7%9A%84%E8%BE%B9/images/1626676179-kGxcmu-image.png" style="width: 250px; " /></p>
 
 <pre>
 <strong>输入:</strong> edges = [[1,2],[2,3],[3,4],[1,4],[1,5]]
diff --git "a/lcp/LCP 02. \345\210\206\345\274\217\345\214\226\347\256\200/README.md" "b/lcp/LCP 02. \345\210\206\345\274\217\345\214\226\347\256\200/README.md"
index 878eb1812df57..a622eee4f7110 100644
--- "a/lcp/LCP 02. \345\210\206\345\274\217\345\214\226\347\256\200/README.md"	
+++ "b/lcp/LCP 02. \345\210\206\345\274\217\345\214\226\347\256\200/README.md"	
@@ -6,7 +6,7 @@
 
 <p>有一个同学在学习分式。他需要将一个连分数化成最简分数，你能帮助他吗？</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2002.%20分式化简/images/fraction_example_1.jpg" style="height: 195px; width: 480px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2002.%20分式化简/images/fraction_example_1.jpg" style="height: 195px; width: 480px;" /></p>
 
 <p>连分数是形如上图的分式。在本题中，所有系数都是大于等于0的整数。</p>
 
diff --git "a/lcp/LCP 04. \350\246\206\347\233\226/README.md" "b/lcp/LCP 04. \350\246\206\347\233\226/README.md"
index 9541066f4bdc6..4f1b2e0a3c4f2 100644
--- "a/lcp/LCP 04. \350\246\206\347\233\226/README.md"	
+++ "b/lcp/LCP 04. \350\246\206\347\233\226/README.md"	
@@ -20,7 +20,7 @@
 <strong>输出：</strong>2
 <strong>解释：</strong>我们最多可以放两块骨牌：[[0, 0], [0, 1]]以及[[0, 2], [1, 2]]。（见下图）</pre>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2004.%20覆盖/images/domino_example_1.jpg" style="height: 204px; width: 304px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2004.%20覆盖/images/domino_example_1.jpg" style="height: 204px; width: 304px;"></p>
 
 <p>&nbsp;</p>
 
@@ -31,7 +31,7 @@
 <strong>解释：</strong>下图是其中一种可行的摆放方式
 </pre>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2004.%20覆盖/images/domino_example_2.jpg" style="height: 304px; width: 304px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2004.%20覆盖/images/domino_example_2.jpg" style="height: 304px; width: 304px;"></p>
 
 <p>&nbsp;</p>
 
diff --git "a/lcp/LCP 05. \345\217\221 LeetCoin/README.md" "b/lcp/LCP 05. \345\217\221 LeetCoin/README.md"
index 68f21d2aa3b01..6634222e53736 100644
--- "a/lcp/LCP 05. \345\217\221 LeetCoin/README.md"	
+++ "b/lcp/LCP 05. \345\217\221 LeetCoin/README.md"	
@@ -56,7 +56,7 @@
 第二次查询时，每个成员得到的LeetCoin的数量分别为（按编号顺序）：500, 50, 50, 0, 50, 15.
 </pre>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2005.%20发%20LeetCoin/images/coin_example_1.jpg" style="height: 344px; width: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2005.%20发%20LeetCoin/images/coin_example_1.jpg" style="height: 344px; width: 300px;"></p>
 
 <p>&nbsp;</p>
 
diff --git "a/lcp/LCP 10. \344\272\214\345\217\211\346\240\221\344\273\273\345\212\241\350\260\203\345\272\246/README.md" "b/lcp/LCP 10. \344\272\214\345\217\211\346\240\221\344\273\273\345\212\241\350\260\203\345\272\246/README.md"
index 9558c57d777eb..cb345685d7772 100644
--- "a/lcp/LCP 10. \344\272\214\345\217\211\346\240\221\344\273\273\345\212\241\350\260\203\345\272\246/README.md"	
+++ "b/lcp/LCP 10. \344\272\214\345\217\211\346\240\221\344\273\273\345\212\241\350\260\203\345\272\246/README.md"	
@@ -15,7 +15,7 @@
 <p><strong>示例 1：</strong></p>
 
 <blockquote>
-<p><img alt="image.png" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/3522fbf8ce4ebb20b79019124eb9870109fdfe97fe9da99f6c20c07ceb1c60b3-image.png" /></p>
+<p><img alt="image.png" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/3522fbf8ce4ebb20b79019124eb9870109fdfe97fe9da99f6c20c07ceb1c60b3-image.png" /></p>
 
 <p>输入：root = [47, 74, 31]</p>
 
@@ -27,7 +27,7 @@
 <p><strong>示例 2：</strong></p>
 
 <blockquote>
-<p><img alt="image.png" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/13accf172ee4a660d241e25901595d55b759380b090890a17e6e7bd51a143e3f-image.png" /></p>
+<p><img alt="image.png" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/13accf172ee4a660d241e25901595d55b759380b090890a17e6e7bd51a143e3f-image.png" /></p>
 
 <p>输入：root = [15, 21, null, 24, null, 27, 26]</p>
 
@@ -37,7 +37,7 @@
 <p><strong>示例 3：</strong></p>
 
 <blockquote>
-<p><img alt="image.png" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/bef743a12591aafb9047dd95d335b8083dfa66e8fdedc63f50fd406b4a9d163a-image.png" /></p>
+<p><img alt="image.png" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2010.%20二叉树任务调度/images/bef743a12591aafb9047dd95d335b8083dfa66e8fdedc63f50fd406b4a9d163a-image.png" /></p>
 
 <p>输入：root = [1,3,2,null,null,4,4]</p>
 
diff --git "a/lcp/LCP 13. \345\257\273\345\256\235/README.md" "b/lcp/LCP 13. \345\257\273\345\256\235/README.md"
index edec11b363c2e..461f66052fe40 100644
--- "a/lcp/LCP 13. \345\257\273\345\256\235/README.md"	
+++ "b/lcp/LCP 13. \345\257\273\345\256\235/README.md"	
@@ -21,7 +21,7 @@
 
 <p>输出：16</p>
 
-<p>解释：最优路线为： S-&gt;O, cost = 4, 去搬石头 O-&gt;第二行的M, cost = 3, M机关触发 第二行的M-&gt;O, cost = 3, 我们需要继续回去 O 搬石头。 O-&gt;第三行的M, cost = 4, 此时所有机关均触发 第三行的M-&gt;T, cost = 2，去T点拿宝藏。 总步数为16。 <img alt="图片.gif" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2013.%20寻宝/images/6bfff669ad65d494cdc237bcedfec10a2b1ac2f2593c2bf97e9aecb41dc8a08b-%E5%9B%BE%E7%89%87.gif" /></p>
+<p>解释：最优路线为： S-&gt;O, cost = 4, 去搬石头 O-&gt;第二行的M, cost = 3, M机关触发 第二行的M-&gt;O, cost = 3, 我们需要继续回去 O 搬石头。 O-&gt;第三行的M, cost = 4, 此时所有机关均触发 第三行的M-&gt;T, cost = 2，去T点拿宝藏。 总步数为16。 <img alt="图片.gif" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2013.%20寻宝/images/6bfff669ad65d494cdc237bcedfec10a2b1ac2f2593c2bf97e9aecb41dc8a08b-%E5%9B%BE%E7%89%87.gif" /></p>
 </blockquote>
 
 <p><strong>示例 2：</strong></p>
diff --git "a/lcp/LCP 15. \346\270\270\344\271\220\345\233\255\347\232\204\350\277\267\345\256\253/README.md" "b/lcp/LCP 15. \346\270\270\344\271\220\345\233\255\347\232\204\350\277\267\345\256\253/README.md"
index a50baf4b39578..99390887a35e1 100644
--- "a/lcp/LCP 15. \346\270\270\344\271\220\345\233\255\347\232\204\350\277\267\345\256\253/README.md"	
+++ "b/lcp/LCP 15. \346\270\270\344\271\220\345\233\255\347\232\204\350\277\267\345\256\253/README.md"	
@@ -6,7 +6,7 @@
 
 <p>小王来到了游乐园，她玩的第一个项目是模拟推销员。有一个二维平面地图，其中散布着 <code>N</code> 个推销点，编号 <code>0</code> 到 <code>N-1</code>，不存在三点共线的情况。每两点之间有一条直线相连。游戏没有规定起点和终点，但限定了每次转角的方向。首先，小王需要先选择两个点分别作为起点和终点，然后从起点开始访问剩余 <code>N-2</code> 个点恰好一次并回到终点。访问的顺序需要满足一串给定的长度为 <code>N-2</code> 由 <code>L</code> 和 <code>R</code> 组成的字符串 <code>direction</code>，表示从起点出发之后在每个顶点上转角的方向。根据这个提示，小王希望你能够帮她找到一个可行的遍历顺序，输出顺序下标（若有多个方案，输出任意一种）。可以证明这样的遍历顺序一定是存在的。</p>
 
-<p><img alt="Screenshot 2020-03-20 at 17.04.58.png" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2015.%20游乐园的迷宫/images/595b60797d4a461287864a8cd05bba1d3b8760104ff83f43b902fd68477be9c3-Screenshot%202020-03-20%20at%2017.04.58.png" style="max-height:500px" /></p>
+<p><img alt="Screenshot 2020-03-20 at 17.04.58.png" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2015.%20游乐园的迷宫/images/595b60797d4a461287864a8cd05bba1d3b8760104ff83f43b902fd68477be9c3-Screenshot%202020-03-20%20at%2017.04.58.png" style="max-height:500px" /></p>
 
 <p>（上图：A-&gt;B-&gt;C 右转； 下图：D-&gt;E-&gt;F 左转）</p>
 
@@ -17,7 +17,7 @@
 
 <p>输入：<code>[0,2,1,3]</code></p>
 
-<p>解释：[0,2,1,3] 是符合"LL"的方案之一。在 [0,2,1,3] 方案中，0-&gt;2-&gt;1 是左转方向， 2-&gt;1-&gt;3 也是左转方向 <img alt="图片.gif" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2015.%20游乐园的迷宫/images/c01c1efc423b916267c2a3a170266c925c368d62afa047c267cc1020970e55d9-%E5%9B%BE%E7%89%87.gif" style="max-height:300px" /></p>
+<p>解释：[0,2,1,3] 是符合"LL"的方案之一。在 [0,2,1,3] 方案中，0-&gt;2-&gt;1 是左转方向， 2-&gt;1-&gt;3 也是左转方向 <img alt="图片.gif" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2015.%20游乐园的迷宫/images/c01c1efc423b916267c2a3a170266c925c368d62afa047c267cc1020970e55d9-%E5%9B%BE%E7%89%87.gif" style="max-height:300px" /></p>
 </blockquote>
 
 <p><strong>示例 2：</strong></p>
diff --git "a/lcp/LCP 21. \350\277\275\351\200\220\346\270\270\346\210\217/README.md" "b/lcp/LCP 21. \350\277\275\351\200\220\346\270\270\346\210\217/README.md"
index 29be444ea26c1..3f04f3fe8742e 100644
--- "a/lcp/LCP 21. \350\277\275\351\200\220\346\270\270\346\210\217/README.md"	
+++ "b/lcp/LCP 21. \350\277\275\351\200\220\346\270\270\346\210\217/README.md"	
@@ -28,7 +28,7 @@
 
 > 解释：
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2021.%20追逐游戏/images/1597991318-goeHHr-image.png){:height="250px"}
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2021.%20追逐游戏/images/1597991318-goeHHr-image.png){:height="250px"}
 
 >
 
@@ -50,7 +50,7 @@
 
 > 解释：
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2021.%20追逐游戏/images/1597991157-QfeakF-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2021.%20追逐游戏/images/1597991157-QfeakF-image.png)
 
 >
 
diff --git "a/lcp/LCP 26. \345\257\274\350\210\252\350\243\205\347\275\256/README.md" "b/lcp/LCP 26. \345\257\274\350\210\252\350\243\205\347\275\256/README.md"
index ab0cd916649df..5db5fdec2a0df 100644
--- "a/lcp/LCP 26. \345\257\274\350\210\252\350\243\205\347\275\256/README.md"	
+++ "b/lcp/LCP 26. \345\257\274\350\210\252\350\243\205\347\275\256/README.md"	
@@ -22,7 +22,7 @@
 
 >
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2026.%20导航装置/images/1597996812-tqrgwu-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2026.%20导航装置/images/1597996812-tqrgwu-image.png)
 
 **示例 2：**
 
@@ -38,7 +38,7 @@
 
 >
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2026.%20导航装置/images/1597996826-EUQRyz-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2026.%20导航装置/images/1597996826-EUQRyz-image.png)
 
 **提示：**
 
diff --git "a/lcp/LCP 27. \351\273\221\347\233\222\345\205\211\347\272\277\345\217\215\345\260\204/README.md" "b/lcp/LCP 27. \351\273\221\347\233\222\345\205\211\347\272\277\345\217\215\345\260\204/README.md"
index 5e5629922467b..577b0db95f7b1 100644
--- "a/lcp/LCP 27. \351\273\221\347\233\222\345\205\211\347\272\277\345\217\215\345\260\204/README.md"	
+++ "b/lcp/LCP 27. \351\273\221\347\233\222\345\205\211\347\272\277\345\217\215\345\260\204/README.md"	
@@ -6,7 +6,7 @@
 
 秋日市集上有个奇怪的黑盒，黑盒的主视图为 n\*m 的矩形。从黑盒的主视图来看，黑盒的上面和下面各均匀分布有 m 个小孔，黑盒的左面和右面各均匀分布有 n 个小孔。黑盒左上角小孔序号为 0，按顺时针编号，总共有 2\*(m+n) 个小孔。每个小孔均可以打开或者关闭，初始时，所有小孔均处于关闭状态。每个小孔上的盖子均为镜面材质。例如一个 2\*3 的黑盒主视图与其小孔分布如图所示:
 
-![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1598951281-ZCBrif-image.png)
+![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1598951281-ZCBrif-image.png)
 
 店长告诉小扣，这里是「几何学的快问快答」，店长可能有两种操作：
 
@@ -18,14 +18,14 @@
 -   `index`： 表示小孔序号
 -   `direction`：`1` 表示光线沿 $y=x$ 方向，`-1` 表示光线沿 $y=-x$ 方向。
 
-![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1599620810-HdOlMi-image.png)
+![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1599620810-HdOlMi-image.png)
 
 当光线照至边界时：若边界上的小孔为开启状态，则光线会射出；否则，光线会在小孔之间进行反射。特别地：
 
 1. 若光线射向未打开的拐角（黑盒顶点），则光线会原路反射回去；
 2. 光线自拐角处的小孔照入时，只有一种入射方向（如自序号为 0 的小孔照入方向只能为 `-1`）
 
-![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1598953840-DLiAsf-image.png)
+![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1598953840-DLiAsf-image.png)
 
 请帮助小扣判断并返回店长每次照入的光线从几号小孔射出。
 
@@ -53,7 +53,7 @@
 >
 > 解释：
 >
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1599204202-yGDMVk-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2027.%20黑盒光线反射/images/1599204202-yGDMVk-image.png)
 >
 > BlackBox b = BlackBox(3,3); // 新建一个 3x3 的黑盒
 > b.open(1,-1) // 打开 1 号小孔，并沿 y=-x 方向照入光线，光线轨迹为 1-5-7-11-1，从 1 号小孔射出
diff --git "a/lcp/LCP 29. \344\271\220\345\233\242\347\253\231\344\275\215/README.md" "b/lcp/LCP 29. \344\271\220\345\233\242\347\253\231\344\275\215/README.md"
index b446804192d06..6f79147311a53 100644
--- "a/lcp/LCP 29. \344\271\220\345\233\242\347\253\231\344\275\215/README.md"	
+++ "b/lcp/LCP 29. \344\271\220\345\233\242\347\253\231\344\275\215/README.md"	
@@ -8,7 +8,7 @@
 
 为保证声乐混合效果，成员站位规则为：自 `grid` 左上角开始顺时针螺旋形向内循环以 `1，2，...，9` 循环重复排列。例如当 num = `5` 时，站位如图所示
 
-![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125411-WOblWH-image.png)
+![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125411-WOblWH-image.png)
 
 请返回位于场地坐标 [`Xpos`,`Ypos`] 的成员所持乐器编号。
 
@@ -19,7 +19,7 @@
 > 输出：`3`
 >
 > 解释：
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125437-WUOwsu-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125437-WUOwsu-image.png)
 
 **示例 2：**
 
@@ -28,7 +28,7 @@
 > 输出：`5`
 >
 > 解释：
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125453-IIDpxg-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2029.%20乐团站位/images/1616125453-IIDpxg-image.png)
 
 **提示：**
 
diff --git "a/lcp/LCP 31. \345\217\230\346\215\242\347\232\204\350\277\267\345\256\253/README.md" "b/lcp/LCP 31. \345\217\230\346\215\242\347\232\204\350\277\267\345\256\253/README.md"
index daab0bdb49f16..a90bf65148e17 100644
--- "a/lcp/LCP 31. \345\217\230\346\215\242\347\232\204\350\277\267\345\256\253/README.md"	
+++ "b/lcp/LCP 31. \345\217\230\346\215\242\347\232\204\350\277\267\345\256\253/README.md"	
@@ -24,7 +24,7 @@
 > 输出：`true`
 >
 > 解释：
-> ![maze.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2031.%20变换的迷宫/images/1615892239-SCIjyf-maze.gif)
+> ![maze.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2031.%20变换的迷宫/images/1615892239-SCIjyf-maze.gif)
 
 **示例 2：**
 
diff --git "a/lcp/LCP 33. \350\223\204\346\260\264/README.md" "b/lcp/LCP 33. \350\223\204\346\260\264/README.md"
index ed4b1e7198c49..a7c2faa3cebf8 100644
--- "a/lcp/LCP 33. \350\223\204\346\260\264/README.md"	
+++ "b/lcp/LCP 33. \350\223\204\346\260\264/README.md"	
@@ -22,7 +22,7 @@
 > 解释：
 > 第 1 次操作升级 bucket[0]；
 > 第 2 ~ 4 次操作均选择蓄水，即可完成蓄水要求。
-> ![vat1.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2033.%20蓄水/images/1616122992-RkDxoL-vat1.gif)
+> ![vat1.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2033.%20蓄水/images/1616122992-RkDxoL-vat1.gif)
 
 **示例 2：**
 
diff --git "a/lcp/LCP 34. \344\272\214\345\217\211\346\240\221\346\237\223\350\211\262/README.md" "b/lcp/LCP 34. \344\272\214\345\217\211\346\240\221\346\237\223\350\211\262/README.md"
index 0048b2442ce46..d6dd74dd084de 100644
--- "a/lcp/LCP 34. \344\272\214\345\217\211\346\240\221\346\237\223\350\211\262/README.md"	
+++ "b/lcp/LCP 34. \344\272\214\345\217\211\346\240\221\346\237\223\350\211\262/README.md"	
@@ -12,7 +12,7 @@
 >
 > 输出：`12`
 >
-> 解释：`结点 5、3、4 染成蓝色，获得最大的价值 5+3+4=12` > ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2034.%20二叉树染色/images/1616126267-BqaCRj-image.png)
+> 解释：`结点 5、3、4 染成蓝色，获得最大的价值 5+3+4=12` > ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2034.%20二叉树染色/images/1616126267-BqaCRj-image.png)
 
 **示例 2：**
 
@@ -21,7 +21,7 @@
 > 输出：`16`
 >
 > 解释：结点 4、3、9 染成蓝色，获得最大的价值 4+3+9=16
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2034.%20二叉树染色/images/1616126301-gJbhba-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2034.%20二叉树染色/images/1616126301-gJbhba-image.png)
 
 **提示：**
 
diff --git "a/lcp/LCP 35. \347\224\265\345\212\250\350\275\246\346\270\270\345\237\216\345\270\202/README.md" "b/lcp/LCP 35. \347\224\265\345\212\250\350\275\246\346\270\270\345\237\216\345\270\202/README.md"
index 176ec0ba62352..6e05eaf86cf10 100644
--- "a/lcp/LCP 35. \347\224\265\345\212\250\350\275\246\346\270\270\345\237\216\345\270\202/README.md"	
+++ "b/lcp/LCP 35. \347\224\265\345\212\250\350\275\246\346\270\270\345\237\216\345\270\202/README.md"	
@@ -16,7 +16,7 @@
 > 在城市 1 仅充 3 单位电至城市 3，然后在城市 3 充 5 单位电，行驶至城市 5。
 > 充电用时共 3\*10 + 5\*1= 35
 > 行驶用时 3 + 5 = 8，此时总用时最短 43。
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2035.%20电动车游城市/images/1616125304-mzVxIV-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2035.%20电动车游城市/images/1616125304-mzVxIV-image.png)
 
 **示例 2：**
 
diff --git "a/lcp/LCP 38. \345\256\210\345\215\253\345\237\216\345\240\241/README.md" "b/lcp/LCP 38. \345\256\210\345\215\253\345\237\216\345\240\241/README.md"
index 94f973e6a292a..5b77b6c222ed3 100644
--- "a/lcp/LCP 38. \345\256\210\345\215\253\345\237\216\345\240\241/README.md"	
+++ "b/lcp/LCP 38. \345\256\210\345\215\253\345\237\216\345\240\241/README.md"	
@@ -26,7 +26,7 @@
 > 输出：`3`
 >
 > 解释：至少需要放置三个障碍物
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828255-uuNdNJ-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828255-uuNdNJ-image.png)
 
 **示例 2：**
 
@@ -35,7 +35,7 @@
 > 输出：`-1`
 >
 > 解释：无论怎样修筑障碍物，均无法阻挡最左侧出生的恶魔到达城堡位置
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828208-oFlpVs-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828208-oFlpVs-image.png)
 
 **示例 3：**
 
@@ -44,7 +44,7 @@
 > 输出：`0`
 >
 > 解释：无需放置障碍物即可获得胜利
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828242-oveClu-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828242-oveClu-image.png)
 
 **示例 4：**
 
@@ -53,7 +53,7 @@
 > 输出：`4`
 >
 > 解释：至少需要放置 4 个障碍物，示意图为放置方法之一
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828218-sIAYkb-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2038.%20守卫城堡/images/1614828218-sIAYkb-image.png)
 
 **提示：**
 
diff --git "a/lcp/LCP 39. \346\227\240\344\272\272\346\234\272\346\226\271\351\230\265/README.md" "b/lcp/LCP 39. \346\227\240\344\272\272\346\234\272\346\226\271\351\230\265/README.md"
index 5e0871be59265..cfa38f6dac155 100644
--- "a/lcp/LCP 39. \346\227\240\344\272\272\346\234\272\346\226\271\351\230\265/README.md"	
+++ "b/lcp/LCP 39. \346\227\240\344\272\272\346\234\272\346\226\271\351\230\265/README.md"	
@@ -26,7 +26,7 @@
 > 将 `[1,0]` 处的无人机移动至 `[1,1]` 处；
 > 将 `[1,1]` 处的无人机移动至 `[1,0]` 处，其灯光颜色切换为颜色编号为 `6` 的灯光；
 > 因此从`source` 到 `target` 所需要的最少灯光切换次数为 1。
-> ![8819ccdd664e91c78cde3bba3c701986.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2039.%20无人机方阵/images/1628823765-uCDaux-8819ccdd664e91c78cde3bba3c701986.gif)
+> ![8819ccdd664e91c78cde3bba3c701986.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2039.%20无人机方阵/images/1628823765-uCDaux-8819ccdd664e91c78cde3bba3c701986.gif)
 
 **示例 2：**
 
diff --git "a/lcp/LCP 41. \351\273\221\347\231\275\347\277\273\350\275\254\346\243\213/README.md" "b/lcp/LCP 41. \351\273\221\347\231\275\347\277\273\350\275\254\346\243\213/README.md"
index a5ecb09c95304..025396c5cd3af 100644
--- "a/lcp/LCP 41. \351\273\221\347\231\275\347\277\273\350\275\254\346\243\213/README.md"	
+++ "b/lcp/LCP 41. \351\273\221\347\231\275\347\277\273\350\275\254\346\243\213/README.md"	
@@ -6,7 +6,7 @@
 
 在 `n*m` 大小的棋盘中，有黑白两种棋子，黑棋记作字母 `"X"`, 白棋记作字母 `"O"`，空余位置记作 `"."`。当落下的棋子与其他相同颜色的棋子在行、列或对角线完全包围（中间不存在空白位置）另一种颜色的棋子，则可以翻转这些棋子的颜色。
 
-![1.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396029-eTgzpN-6da662e67368466a96d203f67bb6e793.gif)![2.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396240-nMvdcc-8e4261afe9f60e05a4f740694b439b6b.gif)![3.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396291-kEtzLL-6fcb682daeecb5c3f56eb88b23c81d33.gif)
+![1.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396029-eTgzpN-6da662e67368466a96d203f67bb6e793.gif)![2.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396240-nMvdcc-8e4261afe9f60e05a4f740694b439b6b.gif)![3.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630396291-kEtzLL-6fcb682daeecb5c3f56eb88b23c81d33.gif)
 
 「力扣挑战赛」黑白翻转棋项目中，将提供给选手一个未形成可翻转棋子的棋盘残局，其状态记作 `chessboard`。若下一步可放置一枚黑棋，请问选手最多能翻转多少枚白棋。
 
@@ -32,7 +32,7 @@
 >
 > 解释：
 > 可以选择下在 `[2,2]` 处，能够翻转白方两枚棋子。
-> ![2126c1d21b1b9a9924c639d449cc6e65.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1626683255-OBtBud-2126c1d21b1b9a9924c639d449cc6e65.gif)
+> ![2126c1d21b1b9a9924c639d449cc6e65.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1626683255-OBtBud-2126c1d21b1b9a9924c639d449cc6e65.gif)
 
 **示例 3：**
 
@@ -42,7 +42,7 @@
 >
 > 解释：
 > 可以选择下在 `[6,3]` 处，能够翻转白方四枚棋子。
-> ![803f2f04098b6174397d6c696f54d709.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630393770-Puyked-803f2f04098b6174397d6c696f54d709.gif)
+> ![803f2f04098b6174397d6c696f54d709.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2041.%20黑白翻转棋/images/1630393770-Puyked-803f2f04098b6174397d6c696f54d709.gif)
 
 **提示：**
 
diff --git "a/lcp/LCP 42. \347\216\251\345\205\267\345\245\227\345\234\210/README.md" "b/lcp/LCP 42. \347\216\251\345\205\267\345\245\227\345\234\210/README.md"
index bbcfb928c5c32..87f98cecf4e19 100644
--- "a/lcp/LCP 42. \347\216\251\345\205\267\345\245\227\345\234\210/README.md"	
+++ "b/lcp/LCP 42. \347\216\251\345\205\267\345\245\227\345\234\210/README.md"	
@@ -22,7 +22,7 @@
 > 输出：`1`
 >
 > 解释： 如图所示，仅套中一个玩具
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2042.%20玩具套圈/images/1629194140-ydKiGF-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2042.%20玩具套圈/images/1629194140-ydKiGF-image.png)
 
 **示例 2：**
 
@@ -31,7 +31,7 @@
 > 输出：`2`
 >
 > 解释： 如图所示，套中两个玩具
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2042.%20玩具套圈/images/1629194157-RiOAuy-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2042.%20玩具套圈/images/1629194157-RiOAuy-image.png)
 
 **提示：**
 
diff --git "a/lcp/LCP 43. \345\215\201\345\255\227\350\267\257\345\217\243\347\232\204\344\272\244\351\200\232/README.md" "b/lcp/LCP 43. \345\215\201\345\255\227\350\267\257\345\217\243\347\232\204\344\272\244\351\200\232/README.md"
index 45522f49281ca..5fa12c6ba05c0 100644
--- "a/lcp/LCP 43. \345\215\201\345\255\227\350\267\257\345\217\243\347\232\204\344\272\244\351\200\232/README.md"	
+++ "b/lcp/LCP 43. \345\215\201\345\255\227\350\267\257\345\217\243\347\232\204\344\272\244\351\200\232/README.md"	
@@ -21,7 +21,7 @@
 
 各个车道驶出的车辆可能的行驶路线如图所示：
 
-![图片.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2043.%20十字路口的交通/images/1630393755-gyPeMM-%E5%9B%BE%E7%89%87.png)
+![图片.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2043.%20十字路口的交通/images/1630393755-gyPeMM-%E5%9B%BE%E7%89%87.png)
 
 **注意：**
 
diff --git "a/lcp/LCP 46. \345\277\227\346\204\277\350\200\205\350\260\203\351\205\215/README.md" "b/lcp/LCP 46. \345\277\227\346\204\277\350\200\205\350\260\203\351\205\215/README.md"
index 6743517ab628a..54fa1a30967bc 100644
--- "a/lcp/LCP 46. \345\277\227\346\204\277\350\200\205\350\260\203\351\205\215/README.md"	
+++ "b/lcp/LCP 46. \345\277\227\346\204\277\350\200\205\350\260\203\351\205\215/README.md"	
@@ -28,7 +28,7 @@
 
 **示例 1：**
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2046.%20%E5%BF%97%E6%84%BF%E8%80%85%E8%B0%83%E9%85%8D/images/1630061228-gnZsOz-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2046.%20%E5%BF%97%E6%84%BF%E8%80%85%E8%B0%83%E9%85%8D/images/1630061228-gnZsOz-image.png)
 
 > 输入：
 
@@ -42,7 +42,7 @@
 
 > 解释：
 
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2046.%20%E5%BF%97%E6%84%BF%E8%80%85%E8%B0%83%E9%85%8D/images/1630061300-WuVkeF-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2046.%20%E5%BF%97%E6%84%BF%E8%80%85%E8%B0%83%E9%85%8D/images/1630061300-WuVkeF-image.png)
 
 **示例 2 ：**
 
diff --git "a/lcp/LCP 47. \345\205\245\345\234\272\345\256\211\346\243\200/README.md" "b/lcp/LCP 47. \345\205\245\345\234\272\345\256\211\346\243\200/README.md"
index a0e0df650a03d..5f81765b3c821 100644
--- "a/lcp/LCP 47. \345\205\245\345\234\272\345\256\211\346\243\200/README.md"	
+++ "b/lcp/LCP 47. \345\205\245\345\234\272\345\256\211\346\243\200/README.md"	
@@ -10,7 +10,7 @@
 
 -   后进先出：在安检室中的所有观众中，最晚进入安检室的观众最先离开
 
-![c24754f1a5ff56989340ba5004dc5eda.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2047.%20%E5%85%A5%E5%9C%BA%E5%AE%89%E6%A3%80/images/1628843202-cdFPSt-c24754f1a5ff56989340ba5004dc5eda.gif)
+![c24754f1a5ff56989340ba5004dc5eda.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2047.%20%E5%85%A5%E5%9C%BA%E5%AE%89%E6%A3%80/images/1628843202-cdFPSt-c24754f1a5ff56989340ba5004dc5eda.gif)
 
 恰好 `M+1` 位入场的观众（编号从 0 开始）需要排队**依次**入场安检， 入场安检的规则如下：
 
@@ -52,7 +52,7 @@
 
 > 以下是方案 1 的示意图：
 
-> ![c60e38199a225ad62f13b954872edf9b.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2047.%20%E5%85%A5%E5%9C%BA%E5%AE%89%E6%A3%80/images/1628841618-bFKsnt-c60e38199a225ad62f13b954872edf9b.gif)
+> ![c60e38199a225ad62f13b954872edf9b.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2047.%20%E5%85%A5%E5%9C%BA%E5%AE%89%E6%A3%80/images/1628841618-bFKsnt-c60e38199a225ad62f13b954872edf9b.gif)
 
 **示例 2：**
 
diff --git "a/lcp/LCP 48. \346\227\240\351\231\220\346\243\213\345\261\200/README.md" "b/lcp/LCP 48. \346\227\240\351\231\220\346\243\213\345\261\200/README.md"
index ef9c84a5a7b3e..64ddc17a03591 100644
--- "a/lcp/LCP 48. \346\227\240\351\231\220\346\243\213\345\261\200/README.md"	
+++ "b/lcp/LCP 48. \346\227\240\351\231\220\346\243\213\345\261\200/README.md"	
@@ -50,7 +50,7 @@
 
 > 解释：三步之内黑棋必胜，以下是一种可能的落子情况：
 
-> ![902b87df29998b1c181146c8fdb3a4b6.gif](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2048.%20%E6%97%A0%E9%99%90%E6%A3%8B%E5%B1%80/images/1629800639-KabOfY-902b87df29998b1c181146c8fdb3a4b6.gif)
+> ![902b87df29998b1c181146c8fdb3a4b6.gif](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2048.%20%E6%97%A0%E9%99%90%E6%A3%8B%E5%B1%80/images/1629800639-KabOfY-902b87df29998b1c181146c8fdb3a4b6.gif)
 
 **提示：**
 
diff --git "a/lcp/LCP 49. \347\216\257\345\275\242\351\227\257\345\205\263\346\270\270\346\210\217/README.md" "b/lcp/LCP 49. \347\216\257\345\275\242\351\227\257\345\205\263\346\270\270\346\210\217/README.md"
index b6401e952748c..57f41cff563e5 100644
--- "a/lcp/LCP 49. \347\216\257\345\275\242\351\227\257\345\205\263\346\270\270\346\210\217/README.md"	
+++ "b/lcp/LCP 49. \347\216\257\345\275\242\351\227\257\345\205\263\346\270\270\346\210\217/README.md"	
@@ -6,7 +6,7 @@
 
 「力扣挑战赛」中有一个由 `N` 个关卡组成的**环形**闯关游戏，关卡编号为 `0`~`N-1`，编号 `0` 的关卡和编号 `N-1` 的关卡相邻。每个关卡均有积分要求，`challenge[i]` 表示挑战编号 `i` 的关卡最少需要拥有的积分。
 
-![图片.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2049.%20%E7%8E%AF%E5%BD%A2%E9%97%AF%E5%85%B3%E6%B8%B8%E6%88%8F/images/1630392170-ucncVS-%E5%9B%BE%E7%89%87.png)
+![图片.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcp/LCP%2049.%20%E7%8E%AF%E5%BD%A2%E9%97%AF%E5%85%B3%E6%B8%B8%E6%88%8F/images/1630392170-ucncVS-%E5%9B%BE%E7%89%87.png)
 
 小扣想要挑战关卡，闯关的具体规则如下：
 
diff --git "a/lcs/LCS 03. \344\270\273\351\242\230\347\251\272\351\227\264/README.md" "b/lcs/LCS 03. \344\270\273\351\242\230\347\251\272\351\227\264/README.md"
index 6ea67be142a8d..6fc1f19642e9d 100644
--- "a/lcs/LCS 03. \344\270\273\351\242\230\347\251\272\351\227\264/README.md"	
+++ "b/lcs/LCS 03. \344\270\273\351\242\230\347\251\272\351\227\264/README.md"	
@@ -15,7 +15,7 @@
 > 输出：`1`
 >
 > 解释：4 个主题空间中，只有 1 个不与走廊相邻，面积为 1。
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcs/LCS%2003.%20主题空间/images/1613708145-rscctN-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcs/LCS%2003.%20主题空间/images/1613708145-rscctN-image.png)
 
 **示例 2:**
 
@@ -24,7 +24,7 @@
 > 输出：`3`
 >
 > 解释：8 个主题空间中，有 5 个不与走廊相邻，面积分别为 3、1、1、1、2，最大面积为 3。
-> ![image.png](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/lcs/LCS%2003.%20主题空间/images/1613707985-KJyiXJ-image.png)
+> ![image.png](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/lcs/LCS%2003.%20主题空间/images/1613707985-KJyiXJ-image.png)
 
 **提示：**
 
diff --git a/solution/0000-0099/0002.Add Two Numbers/README.md b/solution/0000-0099/0002.Add Two Numbers/README.md
index f71479efae48d..1268822daa55c 100644
--- a/solution/0000-0099/0002.Add Two Numbers/README.md	
+++ b/solution/0000-0099/0002.Add Two Numbers/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0002.Add%20Two%20Numbers/images/addtwonumber1.jpg" style="width: 483px; height: 342px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0002.Add%20Two%20Numbers/images/addtwonumber1.jpg" style="width: 483px; height: 342px;" />
 <pre>
 <strong>输入：</strong>l1 = [2,4,3], l2 = [5,6,4]
 <strong>输出：</strong>[7,0,8]
diff --git a/solution/0000-0099/0002.Add Two Numbers/README_EN.md b/solution/0000-0099/0002.Add Two Numbers/README_EN.md
index 2eb9477866793..6553f2e4c1346 100644
--- a/solution/0000-0099/0002.Add Two Numbers/README_EN.md	
+++ b/solution/0000-0099/0002.Add Two Numbers/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0002.Add%20Two%20Numbers/images/addtwonumber1.jpg" style="width: 483px; height: 342px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0002.Add%20Two%20Numbers/images/addtwonumber1.jpg" style="width: 483px; height: 342px;" />
 <pre>
 <strong>Input:</strong> l1 = [2,4,3], l2 = [5,6,4]
 <strong>Output:</strong> [7,0,8]
diff --git a/solution/0000-0099/0011.Container With Most Water/README.md b/solution/0000-0099/0011.Container With Most Water/README.md
index 1ad7853256910..f060180aadbc1 100644
--- a/solution/0000-0099/0011.Container With Most Water/README.md	
+++ b/solution/0000-0099/0011.Container With Most Water/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0011.Container%20With%20Most%20Water/images/question_11.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0011.Container%20With%20Most%20Water/images/question_11.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>[1,8,6,2,5,4,8,3,7]
diff --git a/solution/0000-0099/0011.Container With Most Water/README_EN.md b/solution/0000-0099/0011.Container With Most Water/README_EN.md
index 58447b20bbbd3..afa62007b40c1 100644
--- a/solution/0000-0099/0011.Container With Most Water/README_EN.md	
+++ b/solution/0000-0099/0011.Container With Most Water/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0011.Container%20With%20Most%20Water/images/question_11.jpg" style="width: 600px; height: 287px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0011.Container%20With%20Most%20Water/images/question_11.jpg" style="width: 600px; height: 287px;" />
 <pre>
 <strong>Input:</strong> height = [1,8,6,2,5,4,8,3,7]
 <strong>Output:</strong> 49
diff --git a/solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md b/solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md
index fa7bcc285a224..1a9b30df54ef4 100644
--- a/solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md	
+++ b/solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md	
@@ -10,7 +10,7 @@
 
 <p>给出数字到字母的映射如下（与电话按键相同）。注意 1 不对应任何字母。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/200px-telephone-keypad2svg.png" style="width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/200px-telephone-keypad2svg.png" style="width: 200px;" /></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/0000-0099/0017.Letter Combinations of a Phone Number/README_EN.md b/solution/0000-0099/0017.Letter Combinations of a Phone Number/README_EN.md
index 630dce1f61aeb..c6b519da0cd98 100644
--- a/solution/0000-0099/0017.Letter Combinations of a Phone Number/README_EN.md	
+++ b/solution/0000-0099/0017.Letter Combinations of a Phone Number/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>A mapping of digit to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/200px-Telephone-keypad2.svg.png" style="width: 200px; height: 162px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/200px-Telephone-keypad2.svg.png" style="width: 200px; height: 162px;" /></p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
diff --git a/solution/0000-0099/0019.Remove Nth Node From End of List/README.md b/solution/0000-0099/0019.Remove Nth Node From End of List/README.md
index 1ad84ca92757c..d64154641a511 100644
--- a/solution/0000-0099/0019.Remove Nth Node From End of List/README.md	
+++ b/solution/0000-0099/0019.Remove Nth Node From End of List/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0019.Remove%20Nth%20Node%20From%20End%20of%20List/images/remove_ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0019.Remove%20Nth%20Node%20From%20End%20of%20List/images/remove_ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], n = 2
 <strong>输出：</strong>[1,2,3,5]
diff --git a/solution/0000-0099/0019.Remove Nth Node From End of List/README_EN.md b/solution/0000-0099/0019.Remove Nth Node From End of List/README_EN.md
index f72197853bba0..ceb16760bec04 100644
--- a/solution/0000-0099/0019.Remove Nth Node From End of List/README_EN.md	
+++ b/solution/0000-0099/0019.Remove Nth Node From End of List/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0019.Remove%20Nth%20Node%20From%20End%20of%20List/images/remove_ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0019.Remove%20Nth%20Node%20From%20End%20of%20List/images/remove_ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], n = 2
 <strong>Output:</strong> [1,2,3,5]
diff --git a/solution/0000-0099/0021.Merge Two Sorted Lists/README.md b/solution/0000-0099/0021.Merge Two Sorted Lists/README.md
index 3970d620abf33..98bb154f37d64 100644
--- a/solution/0000-0099/0021.Merge Two Sorted Lists/README.md	
+++ b/solution/0000-0099/0021.Merge Two Sorted Lists/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0021.Merge%20Two%20Sorted%20Lists/images/merge_ex1.jpg" style="width: 662px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0021.Merge%20Two%20Sorted%20Lists/images/merge_ex1.jpg" style="width: 662px; height: 302px;" />
 <pre>
 <strong>输入：</strong>l1 = [1,2,4], l2 = [1,3,4]
 <strong>输出：</strong>[1,1,2,3,4,4]
diff --git a/solution/0000-0099/0021.Merge Two Sorted Lists/README_EN.md b/solution/0000-0099/0021.Merge Two Sorted Lists/README_EN.md
index a36a004fdaed5..b57080b2d45cf 100644
--- a/solution/0000-0099/0021.Merge Two Sorted Lists/README_EN.md	
+++ b/solution/0000-0099/0021.Merge Two Sorted Lists/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0021.Merge%20Two%20Sorted%20Lists/images/merge_ex1.jpg" style="width: 662px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0021.Merge%20Two%20Sorted%20Lists/images/merge_ex1.jpg" style="width: 662px; height: 302px;" />
 <pre>
 <strong>Input:</strong> list1 = [1,2,4], list2 = [1,3,4]
 <strong>Output:</strong> [1,1,2,3,4,4]
diff --git a/solution/0000-0099/0024.Swap Nodes in Pairs/README.md b/solution/0000-0099/0024.Swap Nodes in Pairs/README.md
index d5d72364820cc..59e9a67278e2a 100644
--- a/solution/0000-0099/0024.Swap Nodes in Pairs/README.md	
+++ b/solution/0000-0099/0024.Swap Nodes in Pairs/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0024.Swap%20Nodes%20in%20Pairs/images/swap_ex1.jpg" style="width: 422px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0024.Swap%20Nodes%20in%20Pairs/images/swap_ex1.jpg" style="width: 422px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4]
 <strong>输出：</strong>[2,1,4,3]
diff --git a/solution/0000-0099/0024.Swap Nodes in Pairs/README_EN.md b/solution/0000-0099/0024.Swap Nodes in Pairs/README_EN.md
index 4f409b62fd5a2..ff604fc8f48fe 100644
--- a/solution/0000-0099/0024.Swap Nodes in Pairs/README_EN.md	
+++ b/solution/0000-0099/0024.Swap Nodes in Pairs/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0024.Swap%20Nodes%20in%20Pairs/images/swap_ex1.jpg" style="width: 422px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0024.Swap%20Nodes%20in%20Pairs/images/swap_ex1.jpg" style="width: 422px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4]
 <strong>Output:</strong> [2,1,4,3]
diff --git a/solution/0000-0099/0025.Reverse Nodes in k-Group/README.md b/solution/0000-0099/0025.Reverse Nodes in k-Group/README.md
index 11a056a5a6e6e..7d7b68ed8d508 100644
--- a/solution/0000-0099/0025.Reverse Nodes in k-Group/README.md	
+++ b/solution/0000-0099/0025.Reverse Nodes in k-Group/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], k = 2
 <strong>输出：</strong>[2,1,4,3,5]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex2.jpg" style="width: 542px; height: 222px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex2.jpg" style="width: 542px; height: 222px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], k = 3
diff --git a/solution/0000-0099/0025.Reverse Nodes in k-Group/README_EN.md b/solution/0000-0099/0025.Reverse Nodes in k-Group/README_EN.md
index 3a9a01a369150..dd6d6bfb922ea 100644
--- a/solution/0000-0099/0025.Reverse Nodes in k-Group/README_EN.md	
+++ b/solution/0000-0099/0025.Reverse Nodes in k-Group/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], k = 2
 <strong>Output:</strong> [2,1,4,3,5]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex2.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0025.Reverse%20Nodes%20in%20k-Group/images/reverse_ex2.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], k = 3
 <strong>Output:</strong> [3,2,1,4,5]
diff --git a/solution/0000-0099/0036.Valid Sudoku/README.md b/solution/0000-0099/0036.Valid Sudoku/README.md
index 569ab1e4f66dd..2abbc793554b9 100644
--- a/solution/0000-0099/0036.Valid Sudoku/README.md	
+++ b/solution/0000-0099/0036.Valid Sudoku/README.md	
@@ -27,7 +27,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0036.Valid%20Sudoku/images/250px-sudoku-by-l2g-20050714svg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0036.Valid%20Sudoku/images/250px-sudoku-by-l2g-20050714svg.png" style="height:250px; width:250px" />
 <pre>
 <strong>输入：</strong>board = 
 [["5","3",".",".","7",".",".",".","."]
diff --git a/solution/0000-0099/0036.Valid Sudoku/README_EN.md b/solution/0000-0099/0036.Valid Sudoku/README_EN.md
index 64a3d86c8502d..b89017f2f5e8d 100644
--- a/solution/0000-0099/0036.Valid Sudoku/README_EN.md	
+++ b/solution/0000-0099/0036.Valid Sudoku/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0036.Valid%20Sudoku/images/250px-Sudoku-by-L2G-20050714.svg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0036.Valid%20Sudoku/images/250px-Sudoku-by-L2G-20050714.svg.png" style="height:250px; width:250px" />
 <pre>
 <strong>Input:</strong> board = 
 [[&quot;5&quot;,&quot;3&quot;,&quot;.&quot;,&quot;.&quot;,&quot;7&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]
diff --git a/solution/0000-0099/0037.Sudoku Solver/README.md b/solution/0000-0099/0037.Sudoku Solver/README.md
index 0ffbe74c91da2..bb61a0e379813 100644
--- a/solution/0000-0099/0037.Sudoku Solver/README.md	
+++ b/solution/0000-0099/0037.Sudoku Solver/README.md	
@@ -24,13 +24,13 @@
 <div class="original__bRMd">
 <div>
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-sudoku-by-l2g-20050714svg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-sudoku-by-l2g-20050714svg.png" style="height:250px; width:250px" />
 <pre>
 <strong>输入：</strong>board = [["5","3",".",".","7",".",".",".","."],["6",".",".","1","9","5",".",".","."],[".","9","8",".",".",".",".","6","."],["8",".",".",".","6",".",".",".","3"],["4",".",".","8",".","3",".",".","1"],["7",".",".",".","2",".",".",".","6"],[".","6",".",".",".",".","2","8","."],[".",".",".","4","1","9",".",".","5"],[".",".",".",".","8",".",".","7","9"]]
 <strong>输出：</strong>[["5","3","4","6","7","8","9","1","2"],["6","7","2","1","9","5","3","4","8"],["1","9","8","3","4","2","5","6","7"],["8","5","9","7","6","1","4","2","3"],["4","2","6","8","5","3","7","9","1"],["7","1","3","9","2","4","8","5","6"],["9","6","1","5","3","7","2","8","4"],["2","8","7","4","1","9","6","3","5"],["3","4","5","2","8","6","1","7","9"]]
 <strong>解释：</strong>输入的数独如上图所示，唯一有效的解决方案如下所示：
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-sudoku-by-l2g-20050714_solutionsvg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-sudoku-by-l2g-20050714_solutionsvg.png" style="height:250px; width:250px" />
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0000-0099/0037.Sudoku Solver/README_EN.md b/solution/0000-0099/0037.Sudoku Solver/README_EN.md
index fa57b94f170d3..377922cfc5c23 100644
--- a/solution/0000-0099/0037.Sudoku Solver/README_EN.md	
+++ b/solution/0000-0099/0037.Sudoku Solver/README_EN.md	
@@ -18,13 +18,13 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-Sudoku-by-L2G-20050714.svg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-Sudoku-by-L2G-20050714.svg.png" style="height:250px; width:250px" />
 <pre>
 <strong>Input:</strong> board = [[&quot;5&quot;,&quot;3&quot;,&quot;.&quot;,&quot;.&quot;,&quot;7&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;6&quot;,&quot;.&quot;,&quot;.&quot;,&quot;1&quot;,&quot;9&quot;,&quot;5&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;9&quot;,&quot;8&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;6&quot;,&quot;.&quot;],[&quot;8&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;6&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;3&quot;],[&quot;4&quot;,&quot;.&quot;,&quot;.&quot;,&quot;8&quot;,&quot;.&quot;,&quot;3&quot;,&quot;.&quot;,&quot;.&quot;,&quot;1&quot;],[&quot;7&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;2&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;6&quot;],[&quot;.&quot;,&quot;6&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;2&quot;,&quot;8&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;4&quot;,&quot;1&quot;,&quot;9&quot;,&quot;.&quot;,&quot;.&quot;,&quot;5&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;8&quot;,&quot;.&quot;,&quot;.&quot;,&quot;7&quot;,&quot;9&quot;]]
 <strong>Output:</strong> [[&quot;5&quot;,&quot;3&quot;,&quot;4&quot;,&quot;6&quot;,&quot;7&quot;,&quot;8&quot;,&quot;9&quot;,&quot;1&quot;,&quot;2&quot;],[&quot;6&quot;,&quot;7&quot;,&quot;2&quot;,&quot;1&quot;,&quot;9&quot;,&quot;5&quot;,&quot;3&quot;,&quot;4&quot;,&quot;8&quot;],[&quot;1&quot;,&quot;9&quot;,&quot;8&quot;,&quot;3&quot;,&quot;4&quot;,&quot;2&quot;,&quot;5&quot;,&quot;6&quot;,&quot;7&quot;],[&quot;8&quot;,&quot;5&quot;,&quot;9&quot;,&quot;7&quot;,&quot;6&quot;,&quot;1&quot;,&quot;4&quot;,&quot;2&quot;,&quot;3&quot;],[&quot;4&quot;,&quot;2&quot;,&quot;6&quot;,&quot;8&quot;,&quot;5&quot;,&quot;3&quot;,&quot;7&quot;,&quot;9&quot;,&quot;1&quot;],[&quot;7&quot;,&quot;1&quot;,&quot;3&quot;,&quot;9&quot;,&quot;2&quot;,&quot;4&quot;,&quot;8&quot;,&quot;5&quot;,&quot;6&quot;],[&quot;9&quot;,&quot;6&quot;,&quot;1&quot;,&quot;5&quot;,&quot;3&quot;,&quot;7&quot;,&quot;2&quot;,&quot;8&quot;,&quot;4&quot;],[&quot;2&quot;,&quot;8&quot;,&quot;7&quot;,&quot;4&quot;,&quot;1&quot;,&quot;9&quot;,&quot;6&quot;,&quot;3&quot;,&quot;5&quot;],[&quot;3&quot;,&quot;4&quot;,&quot;5&quot;,&quot;2&quot;,&quot;8&quot;,&quot;6&quot;,&quot;1&quot;,&quot;7&quot;,&quot;9&quot;]]
 <strong>Explanation:</strong>&nbsp;The input board is shown above and the only valid solution is shown below:
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-Sudoku-by-L2G-20050714_solution.svg.png" style="height:250px; width:250px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0037.Sudoku%20Solver/images/250px-Sudoku-by-L2G-20050714_solution.svg.png" style="height:250px; width:250px" />
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0000-0099/0038.Count and Say/README.md b/solution/0000-0099/0038.Count and Say/README.md
index 28b35c64eb32b..bc7a91605006e 100644
--- a/solution/0000-0099/0038.Count and Say/README.md	
+++ b/solution/0000-0099/0038.Count and Say/README.md	
@@ -35,7 +35,7 @@
 <p>要 <strong>描述</strong> 一个数字字符串，首先要将字符串分割为 <strong>最小</strong> 数量的组，每个组都由连续的最多 <strong>相同字符</strong> 组成。然后对于每个组，先描述字符的数量，然后描述字符，形成一个描述组。要将描述转换为数字字符串，先将每组中的字符数量用数字替换，再将所有描述组连接起来。</p>
 
 <p>例如，数字字符串 <code>"3322251"</code> 的描述如下图：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0038.Count%20and%20Say/images/1629874763-TGmKUh-image.png" style="width: 581px; height: 172px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0038.Count%20and%20Say/images/1629874763-TGmKUh-image.png" style="width: 581px; height: 172px;" />
 <ul>
 </ul>
 
diff --git a/solution/0000-0099/0038.Count and Say/README_EN.md b/solution/0000-0099/0038.Count and Say/README_EN.md
index 317317bff3987..b48e6de7dd176 100644
--- a/solution/0000-0099/0038.Count and Say/README_EN.md	
+++ b/solution/0000-0099/0038.Count and Say/README_EN.md	
@@ -14,7 +14,7 @@
 <p>To determine how you &quot;say&quot; a digit string, split it into the <strong>minimal</strong> number of groups so that each group is a contiguous section all of the <strong>same character.</strong> Then for each group, say the number of characters, then say the character. To convert the saying into a digit string, replace the counts with a number and concatenate every saying.</p>
 
 <p>For example, the saying and conversion for digit string <code>&quot;3322251&quot;</code>:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0038.Count%20and%20Say/images/countandsay.jpg" style="width: 581px; height: 172px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0038.Count%20and%20Say/images/countandsay.jpg" style="width: 581px; height: 172px;" />
 <p>Given a positive integer <code>n</code>, return <em>the </em><code>n<sup>th</sup></code><em> term of the <strong>count-and-say</strong> sequence</em>.</p>
 
 <p>&nbsp;</p>
diff --git a/solution/0000-0099/0042.Trapping Rain Water/README.md b/solution/0000-0099/0042.Trapping Rain Water/README.md
index 415815a2c5bbc..170fb1a583dbf 100644
--- a/solution/0000-0099/0042.Trapping Rain Water/README.md	
+++ b/solution/0000-0099/0042.Trapping Rain Water/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0042.Trapping%20Rain%20Water/images/rainwatertrap.png" style="height: 161px; width: 412px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0042.Trapping%20Rain%20Water/images/rainwatertrap.png" style="height: 161px; width: 412px;" /></p>
 
 <pre>
 <strong>输入：</strong>height = [0,1,0,2,1,0,1,3,2,1,2,1]
diff --git a/solution/0000-0099/0042.Trapping Rain Water/README_EN.md b/solution/0000-0099/0042.Trapping Rain Water/README_EN.md
index e5939087b5cb3..f7b517be1c8ff 100644
--- a/solution/0000-0099/0042.Trapping Rain Water/README_EN.md	
+++ b/solution/0000-0099/0042.Trapping Rain Water/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0042.Trapping%20Rain%20Water/images/rainwatertrap.png" style="width: 412px; height: 161px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0042.Trapping%20Rain%20Water/images/rainwatertrap.png" style="width: 412px; height: 161px;" />
 <pre>
 <strong>Input:</strong> height = [0,1,0,2,1,0,1,3,2,1,2,1]
 <strong>Output:</strong> 6
diff --git a/solution/0000-0099/0048.Rotate Image/README.md b/solution/0000-0099/0048.Rotate Image/README.md
index 23d06062a1904..c76878f1329e4 100644
--- a/solution/0000-0099/0048.Rotate Image/README.md	
+++ b/solution/0000-0099/0048.Rotate Image/README.md	
@@ -13,14 +13,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat1.jpg" style="height: 188px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat1.jpg" style="height: 188px; width: 500px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>输出：</strong>[[7,4,1],[8,5,2],[9,6,3]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat2.jpg" style="height: 201px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat2.jpg" style="height: 201px; width: 500px;" />
 <pre>
 <strong>输入：</strong>matrix = [[5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16]]
 <strong>输出：</strong>[[15,13,2,5],[14,3,4,1],[12,6,8,9],[16,7,10,11]]
diff --git a/solution/0000-0099/0048.Rotate Image/README_EN.md b/solution/0000-0099/0048.Rotate Image/README_EN.md
index 00340bdac4a59..af854f1d4e55c 100644
--- a/solution/0000-0099/0048.Rotate Image/README_EN.md	
+++ b/solution/0000-0099/0048.Rotate Image/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat1.jpg" style="width: 500px; height: 188px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat1.jpg" style="width: 500px; height: 188px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> [[7,4,1],[8,5,2],[9,6,3]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat2.jpg" style="width: 500px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0048.Rotate%20Image/images/mat2.jpg" style="width: 500px; height: 201px;" />
 <pre>
 <strong>Input:</strong> matrix = [[5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16]]
 <strong>Output:</strong> [[15,13,2,5],[14,3,4,1],[12,6,8,9],[16,7,10,11]]
diff --git a/solution/0000-0099/0051.N-Queens/README.md b/solution/0000-0099/0051.N-Queens/README.md
index f0d283bc64d8b..ee8f00ef9c3f0 100644
--- a/solution/0000-0099/0051.N-Queens/README.md
+++ b/solution/0000-0099/0051.N-Queens/README.md
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0051.N-Queens/images/queens.jpg" style="width: 600px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0051.N-Queens/images/queens.jpg" style="width: 600px; height: 268px;" />
 <pre>
 <strong>输入：</strong>n = 4
 <strong>输出：</strong>[[".Q..","...Q","Q...","..Q."],["..Q.","Q...","...Q",".Q.."]]
diff --git a/solution/0000-0099/0051.N-Queens/README_EN.md b/solution/0000-0099/0051.N-Queens/README_EN.md
index 6dc6c9365b508..1016940b1c9d7 100644
--- a/solution/0000-0099/0051.N-Queens/README_EN.md
+++ b/solution/0000-0099/0051.N-Queens/README_EN.md
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0051.N-Queens/images/queens.jpg" style="width: 600px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0051.N-Queens/images/queens.jpg" style="width: 600px; height: 268px;" />
 <pre>
 <strong>Input:</strong> n = 4
 <strong>Output:</strong> [[&quot;.Q..&quot;,&quot;...Q&quot;,&quot;Q...&quot;,&quot;..Q.&quot;],[&quot;..Q.&quot;,&quot;Q...&quot;,&quot;...Q&quot;,&quot;.Q..&quot;]]
diff --git a/solution/0000-0099/0052.N-Queens II/README.md b/solution/0000-0099/0052.N-Queens II/README.md
index f214f6f87a4bb..37a5654216631 100644
--- a/solution/0000-0099/0052.N-Queens II/README.md	
+++ b/solution/0000-0099/0052.N-Queens II/README.md	
@@ -15,7 +15,7 @@
 <div class="original__bRMd">
 <div>
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0052.N-Queens%20II/images/queens.jpg" style="width: 600px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0052.N-Queens%20II/images/queens.jpg" style="width: 600px; height: 268px;" />
 <pre>
 <strong>输入：</strong>n = 4
 <strong>输出：</strong>2
diff --git a/solution/0000-0099/0052.N-Queens II/README_EN.md b/solution/0000-0099/0052.N-Queens II/README_EN.md
index 64572e4da6cca..b78f13119d3c8 100644
--- a/solution/0000-0099/0052.N-Queens II/README_EN.md	
+++ b/solution/0000-0099/0052.N-Queens II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0052.N-Queens%20II/images/queens.jpg" style="width: 600px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0052.N-Queens%20II/images/queens.jpg" style="width: 600px; height: 268px;" />
 <pre>
 <strong>Input:</strong> n = 4
 <strong>Output:</strong> 2
diff --git a/solution/0000-0099/0054.Spiral Matrix/README.md b/solution/0000-0099/0054.Spiral Matrix/README.md
index a9c2ccf5bf281..2310dde01dfd1 100644
--- a/solution/0000-0099/0054.Spiral Matrix/README.md	
+++ b/solution/0000-0099/0054.Spiral Matrix/README.md	
@@ -11,14 +11,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>输出：</strong>[1,2,3,6,9,8,7,4,5]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,2,3,4],[5,6,7,8],[9,10,11,12]]
 <strong>输出：</strong>[1,2,3,4,8,12,11,10,9,5,6,7]
diff --git a/solution/0000-0099/0054.Spiral Matrix/README_EN.md b/solution/0000-0099/0054.Spiral Matrix/README_EN.md
index ae8b54901a462..72ed5e56c0f9e 100644
--- a/solution/0000-0099/0054.Spiral Matrix/README_EN.md	
+++ b/solution/0000-0099/0054.Spiral Matrix/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> [1,2,3,6,9,8,7,4,5]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0054.Spiral%20Matrix/images/spiral.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3,4],[5,6,7,8],[9,10,11,12]]
 <strong>Output:</strong> [1,2,3,4,8,12,11,10,9,5,6,7]
diff --git a/solution/0000-0099/0059.Spiral Matrix II/README.md b/solution/0000-0099/0059.Spiral Matrix II/README.md
index e4cc2f32d948c..134d378c1040b 100644
--- a/solution/0000-0099/0059.Spiral Matrix II/README.md	
+++ b/solution/0000-0099/0059.Spiral Matrix II/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0059.Spiral%20Matrix%20II/images/spiraln.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0059.Spiral%20Matrix%20II/images/spiraln.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>n = 3
 <strong>输出：</strong>[[1,2,3],[8,9,4],[7,6,5]]
diff --git a/solution/0000-0099/0059.Spiral Matrix II/README_EN.md b/solution/0000-0099/0059.Spiral Matrix II/README_EN.md
index 6023b4545d8e5..031b4bbbfec30 100644
--- a/solution/0000-0099/0059.Spiral Matrix II/README_EN.md	
+++ b/solution/0000-0099/0059.Spiral Matrix II/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0059.Spiral%20Matrix%20II/images/spiraln.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0059.Spiral%20Matrix%20II/images/spiraln.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> n = 3
 <strong>Output:</strong> [[1,2,3],[8,9,4],[7,6,5]]
diff --git a/solution/0000-0099/0061.Rotate List/README.md b/solution/0000-0099/0061.Rotate List/README.md
index b0494132cfba0..967217f81cd39 100644
--- a/solution/0000-0099/0061.Rotate List/README.md	
+++ b/solution/0000-0099/0061.Rotate List/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/rotate1.jpg" style="width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/rotate1.jpg" style="width: 450px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], k = 2
 <strong>输出：</strong>[4,5,1,2,3]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/roate2.jpg" style="width: 305px; height: 350px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/roate2.jpg" style="width: 305px; height: 350px;" />
 <pre>
 <strong>输入：</strong>head = [0,1,2], k = 4
 <strong>输出：</strong>[2,0,1]
diff --git a/solution/0000-0099/0061.Rotate List/README_EN.md b/solution/0000-0099/0061.Rotate List/README_EN.md
index 3a64c1132c019..fa9373490c898 100644
--- a/solution/0000-0099/0061.Rotate List/README_EN.md	
+++ b/solution/0000-0099/0061.Rotate List/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/rotate1.jpg" style="width: 450px; height: 191px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/rotate1.jpg" style="width: 450px; height: 191px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], k = 2
 <strong>Output:</strong> [4,5,1,2,3]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/roate2.jpg" style="width: 305px; height: 350px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0061.Rotate%20List/images/roate2.jpg" style="width: 305px; height: 350px;" />
 <pre>
 <strong>Input:</strong> head = [0,1,2], k = 4
 <strong>Output:</strong> [2,0,1]
diff --git a/solution/0000-0099/0062.Unique Paths/README.md b/solution/0000-0099/0062.Unique Paths/README.md
index 664acf21de845..5381c7f723b1d 100644
--- a/solution/0000-0099/0062.Unique Paths/README.md	
+++ b/solution/0000-0099/0062.Unique Paths/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0062.Unique%20Paths/images/robot_maze.png" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0062.Unique%20Paths/images/robot_maze.png" />
 <pre>
 <strong>输入：</strong>m = 3, n = 7
 <strong>输出：</strong>28</pre>
diff --git a/solution/0000-0099/0062.Unique Paths/README_EN.md b/solution/0000-0099/0062.Unique Paths/README_EN.md
index 508da3a373b13..0b03cea282399 100644
--- a/solution/0000-0099/0062.Unique Paths/README_EN.md	
+++ b/solution/0000-0099/0062.Unique Paths/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0062.Unique%20Paths/images/robot_maze.png" style="width: 400px; height: 183px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0062.Unique%20Paths/images/robot_maze.png" style="width: 400px; height: 183px;" />
 <pre>
 <strong>Input:</strong> m = 3, n = 7
 <strong>Output:</strong> 28
diff --git a/solution/0000-0099/0063.Unique Paths II/README.md b/solution/0000-0099/0063.Unique Paths II/README.md
index 8810449791617..7aa09346217fb 100644
--- a/solution/0000-0099/0063.Unique Paths II/README.md	
+++ b/solution/0000-0099/0063.Unique Paths II/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot1.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot1.jpg" />
 <pre>
 <strong>输入：</strong>obstacleGrid = [[0,0,0],[0,1,0],[0,0,0]]
 <strong>输出：</strong>2
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot2.jpg" />
 <pre>
 <strong>输入：</strong>obstacleGrid = [[0,1],[0,0]]
 <strong>输出：</strong>1
diff --git a/solution/0000-0099/0063.Unique Paths II/README_EN.md b/solution/0000-0099/0063.Unique Paths II/README_EN.md
index d9e67c677054b..e940f89defbd8 100644
--- a/solution/0000-0099/0063.Unique Paths II/README_EN.md	
+++ b/solution/0000-0099/0063.Unique Paths II/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> obstacleGrid = [[0,0,0],[0,1,0],[0,0,0]]
 <strong>Output:</strong> 2
@@ -25,7 +25,7 @@ There are two ways to reach the bottom-right corner:
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot2.jpg" style="width: 162px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0063.Unique%20Paths%20II/images/robot2.jpg" style="width: 162px; height: 162px;" />
 <pre>
 <strong>Input:</strong> obstacleGrid = [[0,1],[0,0]]
 <strong>Output:</strong> 1
diff --git a/solution/0000-0099/0064.Minimum Path Sum/README.md b/solution/0000-0099/0064.Minimum Path Sum/README.md
index 0a0164a277a65..7818584f47f84 100644
--- a/solution/0000-0099/0064.Minimum Path Sum/README.md	
+++ b/solution/0000-0099/0064.Minimum Path Sum/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0064.Minimum%20Path%20Sum/images/minpath.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0064.Minimum%20Path%20Sum/images/minpath.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>grid = [[1,3,1],[1,5,1],[4,2,1]]
 <strong>输出：</strong>7
diff --git a/solution/0000-0099/0064.Minimum Path Sum/README_EN.md b/solution/0000-0099/0064.Minimum Path Sum/README_EN.md
index 36bd00bb4c7c1..b525f2753dd44 100644
--- a/solution/0000-0099/0064.Minimum Path Sum/README_EN.md	
+++ b/solution/0000-0099/0064.Minimum Path Sum/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0064.Minimum%20Path%20Sum/images/minpath.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0064.Minimum%20Path%20Sum/images/minpath.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,3,1],[1,5,1],[4,2,1]]
 <strong>Output:</strong> 7
diff --git a/solution/0000-0099/0072.Edit Distance/README.md b/solution/0000-0099/0072.Edit Distance/README.md
index 456086166b549..1ed4a85765316 100644
--- a/solution/0000-0099/0072.Edit Distance/README.md	
+++ b/solution/0000-0099/0072.Edit Distance/README.md	
@@ -68,7 +68,7 @@ i, j 分别从 1 开始遍历，判断 `word1[i - 1]` 与 `word2[j - 1]` 是否
 
 递推公式如下：
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0072.Edit%20Distance/images/gif.gif)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0072.Edit%20Distance/images/gif.gif)
 
 最后返回 `dp[m][n]` 即可。
 
diff --git a/solution/0000-0099/0072.Edit Distance/README_EN.md b/solution/0000-0099/0072.Edit Distance/README_EN.md
index f7e169a38f15f..a410221802872 100644
--- a/solution/0000-0099/0072.Edit Distance/README_EN.md	
+++ b/solution/0000-0099/0072.Edit Distance/README_EN.md	
@@ -51,7 +51,7 @@ exection -&gt; execution (insert &#39;u&#39;)
 
 Dynamic programming.
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0072.Edit%20Distance/images/gif.gif)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0072.Edit%20Distance/images/gif.gif)
 
 <!-- tabs:start -->
 
diff --git a/solution/0000-0099/0073.Set Matrix Zeroes/README.md b/solution/0000-0099/0073.Set Matrix Zeroes/README.md
index ae80b0588544e..faf576b714bd8 100644
--- a/solution/0000-0099/0073.Set Matrix Zeroes/README.md	
+++ b/solution/0000-0099/0073.Set Matrix Zeroes/README.md	
@@ -14,14 +14,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat1.jpg" style="width: 450px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat1.jpg" style="width: 450px; height: 169px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>输出：</strong>[[1,0,1],[0,0,0],[1,0,1]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat2.jpg" style="width: 450px; height: 137px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat2.jpg" style="width: 450px; height: 137px;" />
 <pre>
 <strong>输入：</strong>matrix = [[0,1,2,0],[3,4,5,2],[1,3,1,5]]
 <strong>输出：</strong>[[0,0,0,0],[0,4,5,0],[0,3,1,0]]
diff --git a/solution/0000-0099/0073.Set Matrix Zeroes/README_EN.md b/solution/0000-0099/0073.Set Matrix Zeroes/README_EN.md
index 22b659f614ae8..41274bbd5f607 100644
--- a/solution/0000-0099/0073.Set Matrix Zeroes/README_EN.md	
+++ b/solution/0000-0099/0073.Set Matrix Zeroes/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat1.jpg" style="width: 450px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat1.jpg" style="width: 450px; height: 169px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>Output:</strong> [[1,0,1],[0,0,0],[1,0,1]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat2.jpg" style="width: 450px; height: 137px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0073.Set%20Matrix%20Zeroes/images/mat2.jpg" style="width: 450px; height: 137px;" />
 <pre>
 <strong>Input:</strong> matrix = [[0,1,2,0],[3,4,5,2],[1,3,1,5]]
 <strong>Output:</strong> [[0,0,0,0],[0,4,5,0],[0,3,1,0]]
diff --git a/solution/0000-0099/0074.Search a 2D Matrix/README.md b/solution/0000-0099/0074.Search a 2D Matrix/README.md
index 6b100495da6dc..dc8ee91d5c4f9 100644
--- a/solution/0000-0099/0074.Search a 2D Matrix/README.md	
+++ b/solution/0000-0099/0074.Search a 2D Matrix/README.md	
@@ -16,14 +16,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 3
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat2.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat2.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 13
 <strong>输出：</strong>false
diff --git a/solution/0000-0099/0074.Search a 2D Matrix/README_EN.md b/solution/0000-0099/0074.Search a 2D Matrix/README_EN.md
index b2cdc8d016cc1..fd29d419bee60 100644
--- a/solution/0000-0099/0074.Search a 2D Matrix/README_EN.md	
+++ b/solution/0000-0099/0074.Search a 2D Matrix/README_EN.md	
@@ -13,14 +13,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 3
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat2.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0074.Search%20a%202D%20Matrix/images/mat2.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]], target = 13
 <strong>Output:</strong> false
diff --git a/solution/0000-0099/0079.Word Search/README.md b/solution/0000-0099/0079.Word Search/README.md
index 1622a868ec948..32d7a49d01ea9 100644
--- a/solution/0000-0099/0079.Word Search/README.md	
+++ b/solution/0000-0099/0079.Word Search/README.md	
@@ -13,21 +13,21 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word2.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word2.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "ABCCED"
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word-1.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word-1.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "SEE"
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word3.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word3.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "ABCB"
 <strong>输出：</strong>false
diff --git a/solution/0000-0099/0079.Word Search/README_EN.md b/solution/0000-0099/0079.Word Search/README_EN.md
index 6d8b084dfc186..0cc8be99e6f66 100644
--- a/solution/0000-0099/0079.Word Search/README_EN.md	
+++ b/solution/0000-0099/0079.Word Search/README_EN.md	
@@ -10,21 +10,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word2.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word2.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;A&quot;,&quot;B&quot;,&quot;C&quot;,&quot;E&quot;],[&quot;S&quot;,&quot;F&quot;,&quot;C&quot;,&quot;S&quot;],[&quot;A&quot;,&quot;D&quot;,&quot;E&quot;,&quot;E&quot;]], word = &quot;ABCCED&quot;
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word-1.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word-1.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;A&quot;,&quot;B&quot;,&quot;C&quot;,&quot;E&quot;],[&quot;S&quot;,&quot;F&quot;,&quot;C&quot;,&quot;S&quot;],[&quot;A&quot;,&quot;D&quot;,&quot;E&quot;,&quot;E&quot;]], word = &quot;SEE&quot;
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word3.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0079.Word%20Search/images/word3.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;A&quot;,&quot;B&quot;,&quot;C&quot;,&quot;E&quot;],[&quot;S&quot;,&quot;F&quot;,&quot;C&quot;,&quot;S&quot;],[&quot;A&quot;,&quot;D&quot;,&quot;E&quot;,&quot;E&quot;]], word = &quot;ABCB&quot;
 <strong>Output:</strong> false
diff --git a/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README.md b/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README.md
index efbebb5767520..30694b505cd55 100644
--- a/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README.md	
+++ b/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist1.jpg" style="height: 142px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist1.jpg" style="height: 142px; width: 500px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,3,4,4,5]
 <strong>输出：</strong>[1,2,5]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist2.jpg" style="height: 164px; width: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist2.jpg" style="height: 164px; width: 400px;" />
 <pre>
 <strong>输入：</strong>head = [1,1,1,2,3]
 <strong>输出：</strong>[2,3]
diff --git a/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README_EN.md b/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README_EN.md
index 28ab5e3d94773..fb75a8823aa5d 100644
--- a/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README_EN.md	
+++ b/solution/0000-0099/0082.Remove Duplicates from Sorted List II/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist1.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist1.jpg" style="width: 500px; height: 142px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,3,4,4,5]
 <strong>Output:</strong> [1,2,5]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist2.jpg" style="width: 500px; height: 205px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0082.Remove%20Duplicates%20from%20Sorted%20List%20II/images/linkedlist2.jpg" style="width: 500px; height: 205px;" />
 <pre>
 <strong>Input:</strong> head = [1,1,1,2,3]
 <strong>Output:</strong> [2,3]
diff --git a/solution/0000-0099/0083.Remove Duplicates from Sorted List/README.md b/solution/0000-0099/0083.Remove Duplicates from Sorted List/README.md
index 363c818754836..964a43df2bd1e 100644
--- a/solution/0000-0099/0083.Remove Duplicates from Sorted List/README.md	
+++ b/solution/0000-0099/0083.Remove Duplicates from Sorted List/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list1.jpg" style="height: 160px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list1.jpg" style="height: 160px; width: 200px;" />
 <pre>
 <strong>输入：</strong>head = [1,1,2]
 <strong>输出：</strong>[1,2]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list2.jpg" style="height: 123px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list2.jpg" style="height: 123px; width: 300px;" />
 <pre>
 <strong>输入：</strong>head = [1,1,2,3,3]
 <strong>输出：</strong>[1,2,3]
diff --git a/solution/0000-0099/0083.Remove Duplicates from Sorted List/README_EN.md b/solution/0000-0099/0083.Remove Duplicates from Sorted List/README_EN.md
index c1c62c3a7de33..0e7e64cd75384 100644
--- a/solution/0000-0099/0083.Remove Duplicates from Sorted List/README_EN.md	
+++ b/solution/0000-0099/0083.Remove Duplicates from Sorted List/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list1.jpg" style="width: 302px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list1.jpg" style="width: 302px; height: 242px;" />
 <pre>
 <strong>Input:</strong> head = [1,1,2]
 <strong>Output:</strong> [1,2]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list2.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0083.Remove%20Duplicates%20from%20Sorted%20List/images/list2.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,1,2,3,3]
 <strong>Output:</strong> [1,2,3]
diff --git a/solution/0000-0099/0084.Largest Rectangle in Histogram/README.md b/solution/0000-0099/0084.Largest Rectangle in Histogram/README.md
index 68d1ab0a5c043..2c788fa6ab0e9 100644
--- a/solution/0000-0099/0084.Largest Rectangle in Histogram/README.md	
+++ b/solution/0000-0099/0084.Largest Rectangle in Histogram/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>heights = [2,1,5,6,2,3]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram-1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram-1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong> heights = [2,4]
diff --git a/solution/0000-0099/0084.Largest Rectangle in Histogram/README_EN.md b/solution/0000-0099/0084.Largest Rectangle in Histogram/README_EN.md
index 9f58d5cc3bf0c..38ec3a9c11e45 100644
--- a/solution/0000-0099/0084.Largest Rectangle in Histogram/README_EN.md	
+++ b/solution/0000-0099/0084.Largest Rectangle in Histogram/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram.jpg" style="width: 522px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram.jpg" style="width: 522px; height: 242px;" />
 <pre>
 <strong>Input:</strong> heights = [2,1,5,6,2,3]
 <strong>Output:</strong> 10
@@ -17,7 +17,7 @@ The largest rectangle is shown in the red area, which has an area = 10 units.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram-1.jpg" style="width: 202px; height: 362px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram-1.jpg" style="width: 202px; height: 362px;" />
 <pre>
 <strong>Input:</strong> heights = [2,4]
 <strong>Output:</strong> 4
diff --git a/solution/0000-0099/0085.Maximal Rectangle/README.md b/solution/0000-0099/0085.Maximal Rectangle/README.md
index a766f7cdbd8b6..669b1302bdd1e 100644
--- a/solution/0000-0099/0085.Maximal Rectangle/README.md	
+++ b/solution/0000-0099/0085.Maximal Rectangle/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0085.Maximal%20Rectangle/images/maximal.jpg" style="width: 402px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0085.Maximal%20Rectangle/images/maximal.jpg" style="width: 402px; height: 322px;" />
 <pre>
 <strong>输入：</strong>matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]]
 <strong>输出：</strong>6
diff --git a/solution/0000-0099/0085.Maximal Rectangle/README_EN.md b/solution/0000-0099/0085.Maximal Rectangle/README_EN.md
index d2b129401210e..c533870e0c0a9 100644
--- a/solution/0000-0099/0085.Maximal Rectangle/README_EN.md	
+++ b/solution/0000-0099/0085.Maximal Rectangle/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0085.Maximal%20Rectangle/images/maximal.jpg" style="width: 402px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0085.Maximal%20Rectangle/images/maximal.jpg" style="width: 402px; height: 322px;" />
 <pre>
 <strong>Input:</strong> matrix = [[&quot;1&quot;,&quot;0&quot;,&quot;1&quot;,&quot;0&quot;,&quot;0&quot;],[&quot;1&quot;,&quot;0&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;],[&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;],[&quot;1&quot;,&quot;0&quot;,&quot;0&quot;,&quot;1&quot;,&quot;0&quot;]]
 <strong>Output:</strong> 6
diff --git a/solution/0000-0099/0086.Partition List/README.md b/solution/0000-0099/0086.Partition List/README.md
index 07045cc0bf0cb..c09ec691f6e1e 100644
--- a/solution/0000-0099/0086.Partition List/README.md	
+++ b/solution/0000-0099/0086.Partition List/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0086.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0086.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,4,3,2,5,2], x = 3
 <strong>输出</strong>：[1,2,2,4,3,5]
diff --git a/solution/0000-0099/0086.Partition List/README_EN.md b/solution/0000-0099/0086.Partition List/README_EN.md
index 8231a8c23874e..e7b20afb38936 100644
--- a/solution/0000-0099/0086.Partition List/README_EN.md	
+++ b/solution/0000-0099/0086.Partition List/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0086.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0086.Partition%20List/images/partition.jpg" style="width: 662px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,4,3,2,5,2], x = 3
 <strong>Output:</strong> [1,2,2,4,3,5]
diff --git a/solution/0000-0099/0092.Reverse Linked List II/README.md b/solution/0000-0099/0092.Reverse Linked List II/README.md
index 5a91edee8dff3..f22d84345ae22 100644
--- a/solution/0000-0099/0092.Reverse Linked List II/README.md	
+++ b/solution/0000-0099/0092.Reverse Linked List II/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0092.Reverse%20Linked%20List%20II/images/rev2ex2.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0092.Reverse%20Linked%20List%20II/images/rev2ex2.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], left = 2, right = 4
 <strong>输出：</strong>[1,4,3,2,5]
diff --git a/solution/0000-0099/0092.Reverse Linked List II/README_EN.md b/solution/0000-0099/0092.Reverse Linked List II/README_EN.md
index e93e85f8830a6..d6905ef8ed81c 100644
--- a/solution/0000-0099/0092.Reverse Linked List II/README_EN.md	
+++ b/solution/0000-0099/0092.Reverse Linked List II/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0092.Reverse%20Linked%20List%20II/images/rev2ex2.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0092.Reverse%20Linked%20List%20II/images/rev2ex2.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], left = 2, right = 4
 <strong>Output:</strong> [1,4,3,2,5]
diff --git a/solution/0000-0099/0094.Binary Tree Inorder Traversal/README.md b/solution/0000-0099/0094.Binary Tree Inorder Traversal/README.md
index e41e24ea66332..5b1ec669d80c3 100644
--- a/solution/0000-0099/0094.Binary Tree Inorder Traversal/README.md	
+++ b/solution/0000-0099/0094.Binary Tree Inorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0094.Binary%20Tree%20Inorder%20Traversal/images/inorder_1.jpg" style="height: 200px; width: 125px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0094.Binary%20Tree%20Inorder%20Traversal/images/inorder_1.jpg" style="height: 200px; width: 125px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,3]
 <strong>输出：</strong>[1,3,2]
diff --git a/solution/0000-0099/0094.Binary Tree Inorder Traversal/README_EN.md b/solution/0000-0099/0094.Binary Tree Inorder Traversal/README_EN.md
index ae55f6d626493..931e26b51e933 100644
--- a/solution/0000-0099/0094.Binary Tree Inorder Traversal/README_EN.md	
+++ b/solution/0000-0099/0094.Binary Tree Inorder Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0094.Binary%20Tree%20Inorder%20Traversal/images/inorder_1.jpg" style="width: 125px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0094.Binary%20Tree%20Inorder%20Traversal/images/inorder_1.jpg" style="width: 125px; height: 200px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3]
 <strong>Output:</strong> [1,3,2]
diff --git a/solution/0000-0099/0095.Unique Binary Search Trees II/README.md b/solution/0000-0099/0095.Unique Binary Search Trees II/README.md
index c4c4d835189ce..817d59b7d693d 100644
--- a/solution/0000-0099/0095.Unique Binary Search Trees II/README.md	
+++ b/solution/0000-0099/0095.Unique Binary Search Trees II/README.md	
@@ -13,7 +13,7 @@
 <div class="original__bRMd">
 <div>
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0095.Unique%20Binary%20Search%20Trees%20II/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0095.Unique%20Binary%20Search%20Trees%20II/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
 <pre>
 <strong>输入：</strong>n = 3
 <strong>输出：</strong>[[1,null,2,null,3],[1,null,3,2],[2,1,3],[3,1,null,null,2],[3,2,null,1]]
diff --git a/solution/0000-0099/0095.Unique Binary Search Trees II/README_EN.md b/solution/0000-0099/0095.Unique Binary Search Trees II/README_EN.md
index 7aeac2d3378fd..2573a073ceb0e 100644
--- a/solution/0000-0099/0095.Unique Binary Search Trees II/README_EN.md	
+++ b/solution/0000-0099/0095.Unique Binary Search Trees II/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0095.Unique%20Binary%20Search%20Trees%20II/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0095.Unique%20Binary%20Search%20Trees%20II/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
 <pre>
 <strong>Input:</strong> n = 3
 <strong>Output:</strong> [[1,null,2,null,3],[1,null,3,2],[2,1,3],[3,1,null,null,2],[3,2,null,1]]
diff --git a/solution/0000-0099/0096.Unique Binary Search Trees/README.md b/solution/0000-0099/0096.Unique Binary Search Trees/README.md
index 4b94872efb399..66ec18876ca2c 100644
--- a/solution/0000-0099/0096.Unique Binary Search Trees/README.md	
+++ b/solution/0000-0099/0096.Unique Binary Search Trees/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0096.Unique%20Binary%20Search%20Trees/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0096.Unique%20Binary%20Search%20Trees/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
 <pre>
 <strong>输入：</strong>n = 3
 <strong>输出：</strong>5
diff --git a/solution/0000-0099/0096.Unique Binary Search Trees/README_EN.md b/solution/0000-0099/0096.Unique Binary Search Trees/README_EN.md
index d7838426074d8..9acc10e0adb1a 100644
--- a/solution/0000-0099/0096.Unique Binary Search Trees/README_EN.md	
+++ b/solution/0000-0099/0096.Unique Binary Search Trees/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0096.Unique%20Binary%20Search%20Trees/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0096.Unique%20Binary%20Search%20Trees/images/uniquebstn3.jpg" style="width: 600px; height: 148px;" />
 <pre>
 <strong>Input:</strong> n = 3
 <strong>Output:</strong> 5
diff --git a/solution/0000-0099/0097.Interleaving String/README.md b/solution/0000-0099/0097.Interleaving String/README.md
index 0475889c26a39..b984ab117ddab 100644
--- a/solution/0000-0099/0097.Interleaving String/README.md	
+++ b/solution/0000-0099/0097.Interleaving String/README.md	
@@ -22,7 +22,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0097.Interleaving%20String/images/interleave.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0097.Interleaving%20String/images/interleave.jpg" />
 <pre>
 <strong>输入：</strong>s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac"
 <strong>输出：</strong>true
diff --git a/solution/0000-0099/0097.Interleaving String/README_EN.md b/solution/0000-0099/0097.Interleaving String/README_EN.md
index c5076b84b5a61..4c3cb95fb0444 100644
--- a/solution/0000-0099/0097.Interleaving String/README_EN.md	
+++ b/solution/0000-0099/0097.Interleaving String/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0097.Interleaving%20String/images/interleave.jpg" style="width: 561px; height: 203px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0097.Interleaving%20String/images/interleave.jpg" style="width: 561px; height: 203px;" />
 <pre>
 <strong>Input:</strong> s1 = &quot;aabcc&quot;, s2 = &quot;dbbca&quot;, s3 = &quot;aadbbcbcac&quot;
 <strong>Output:</strong> true
diff --git a/solution/0000-0099/0098.Validate Binary Search Tree/README.md b/solution/0000-0099/0098.Validate Binary Search Tree/README.md
index 80c9c849babc3..58f1c6d3d8a70 100644
--- a/solution/0000-0099/0098.Validate Binary Search Tree/README.md	
+++ b/solution/0000-0099/0098.Validate Binary Search Tree/README.md	
@@ -19,14 +19,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 302px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 302px; height: 182px;" />
 <pre>
 <strong>输入：</strong>root = [2,1,3]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 292px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 292px;" />
 <pre>
 <strong>输入：</strong>root = [5,1,4,null,null,3,6]
 <strong>输出：</strong>false
diff --git a/solution/0000-0099/0098.Validate Binary Search Tree/README_EN.md b/solution/0000-0099/0098.Validate Binary Search Tree/README_EN.md
index 94fd1ef4487c7..ace9d74ead28f 100644
--- a/solution/0000-0099/0098.Validate Binary Search Tree/README_EN.md	
+++ b/solution/0000-0099/0098.Validate Binary Search Tree/README_EN.md	
@@ -16,14 +16,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 302px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 302px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 292px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0098.Validate%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 292px;" />
 <pre>
 <strong>Input:</strong> root = [5,1,4,null,null,3,6]
 <strong>Output:</strong> false
diff --git a/solution/0000-0099/0099.Recover Binary Search Tree/README.md b/solution/0000-0099/0099.Recover Binary Search Tree/README.md
index 91f2edd2e4dc9..ff892e02af72f 100644
--- a/solution/0000-0099/0099.Recover Binary Search Tree/README.md	
+++ b/solution/0000-0099/0099.Recover Binary Search Tree/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover1.jpg" style="width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover1.jpg" style="width: 300px;" />
 <pre>
 <strong>输入：</strong>root = [1,3,null,null,2]
 <strong>输出：</strong>[3,1,null,null,2]
@@ -19,7 +19,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover2.jpg" style="height: 208px; width: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover2.jpg" style="height: 208px; width: 400px;" />
 <pre>
 <strong>输入：</strong>root = [3,1,4,null,null,2]
 <strong>输出：</strong>[2,1,4,null,null,3]
diff --git a/solution/0000-0099/0099.Recover Binary Search Tree/README_EN.md b/solution/0000-0099/0099.Recover Binary Search Tree/README_EN.md
index 75f040226c63c..beb73be0a6ec4 100644
--- a/solution/0000-0099/0099.Recover Binary Search Tree/README_EN.md	
+++ b/solution/0000-0099/0099.Recover Binary Search Tree/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover1.jpg" style="width: 422px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover1.jpg" style="width: 422px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,null,null,2]
 <strong>Output:</strong> [3,1,null,null,2]
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover2.jpg" style="width: 581px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0099.Recover%20Binary%20Search%20Tree/images/recover2.jpg" style="width: 581px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,1,4,null,null,2]
 <strong>Output:</strong> [2,1,4,null,null,3]
diff --git a/solution/0100-0199/0100.Same Tree/README.md b/solution/0100-0199/0100.Same Tree/README.md
index 47486c16cbe92..8ac09e1a083a8 100644
--- a/solution/0100-0199/0100.Same Tree/README.md	
+++ b/solution/0100-0199/0100.Same Tree/README.md	
@@ -13,21 +13,21 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex1.jpg" style="width: 622px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex1.jpg" style="width: 622px; height: 182px;" />
 <pre>
 <strong>输入：</strong>p = [1,2,3], q = [1,2,3]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex2.jpg" style="width: 382px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex2.jpg" style="width: 382px; height: 182px;" />
 <pre>
 <strong>输入：</strong>p = [1,2], q = [1,null,2]
 <strong>输出：</strong>false
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex3.jpg" style="width: 622px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex3.jpg" style="width: 622px; height: 182px;" />
 <pre>
 <strong>输入：</strong>p = [1,2,1], q = [1,1,2]
 <strong>输出：</strong>false
diff --git a/solution/0100-0199/0100.Same Tree/README_EN.md b/solution/0100-0199/0100.Same Tree/README_EN.md
index 9a7691ce71af0..a989d1fbfd08b 100644
--- a/solution/0100-0199/0100.Same Tree/README_EN.md	
+++ b/solution/0100-0199/0100.Same Tree/README_EN.md	
@@ -10,21 +10,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex1.jpg" style="width: 622px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex1.jpg" style="width: 622px; height: 182px;" />
 <pre>
 <strong>Input:</strong> p = [1,2,3], q = [1,2,3]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex2.jpg" style="width: 382px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex2.jpg" style="width: 382px; height: 182px;" />
 <pre>
 <strong>Input:</strong> p = [1,2], q = [1,null,2]
 <strong>Output:</strong> false
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex3.jpg" style="width: 622px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0100.Same%20Tree/images/ex3.jpg" style="width: 622px; height: 182px;" />
 <pre>
 <strong>Input:</strong> p = [1,2,1], q = [1,1,2]
 <strong>Output:</strong> false
diff --git a/solution/0100-0199/0101.Symmetric Tree/README.md b/solution/0100-0199/0101.Symmetric Tree/README.md
index 186db3508937e..952cefc890058 100644
--- a/solution/0100-0199/0101.Symmetric Tree/README.md	
+++ b/solution/0100-0199/0101.Symmetric Tree/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree1.jpg" style="width: 354px; height: 291px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree1.jpg" style="width: 354px; height: 291px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,2,3,4,4,3]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree2.jpg" style="width: 308px; height: 258px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree2.jpg" style="width: 308px; height: 258px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,2,null,3,null,3]
 <strong>输出：</strong>false
diff --git a/solution/0100-0199/0101.Symmetric Tree/README_EN.md b/solution/0100-0199/0101.Symmetric Tree/README_EN.md
index 49c7c6219d16c..7ae9542a885fe 100644
--- a/solution/0100-0199/0101.Symmetric Tree/README_EN.md	
+++ b/solution/0100-0199/0101.Symmetric Tree/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree1.jpg" style="width: 354px; height: 291px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree1.jpg" style="width: 354px; height: 291px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,2,3,4,4,3]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree2.jpg" style="width: 308px; height: 258px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0101.Symmetric%20Tree/images/symtree2.jpg" style="width: 308px; height: 258px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,2,null,3,null,3]
 <strong>Output:</strong> false
diff --git a/solution/0100-0199/0102.Binary Tree Level Order Traversal/README.md b/solution/0100-0199/0102.Binary Tree Level Order Traversal/README.md
index 6855a92d833b9..c97d7fe9e6b63 100644
--- a/solution/0100-0199/0102.Binary Tree Level Order Traversal/README.md	
+++ b/solution/0100-0199/0102.Binary Tree Level Order Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0102.Binary%20Tree%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0102.Binary%20Tree%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>[[3],[9,20],[15,7]]
diff --git a/solution/0100-0199/0102.Binary Tree Level Order Traversal/README_EN.md b/solution/0100-0199/0102.Binary Tree Level Order Traversal/README_EN.md
index 9260ab2d8a3f6..8767f3f4f0b0f 100644
--- a/solution/0100-0199/0102.Binary Tree Level Order Traversal/README_EN.md	
+++ b/solution/0100-0199/0102.Binary Tree Level Order Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0102.Binary%20Tree%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0102.Binary%20Tree%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [[3],[9,20],[15,7]]
diff --git a/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README.md b/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README.md
index fb1a8e169566c..4ccb7462aee74 100644
--- a/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README.md	
+++ b/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>[[3],[20,9],[15,7]]
diff --git a/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README_EN.md b/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README_EN.md
index 41ae7dc0b52d5..f3e5f289eba2e 100644
--- a/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README_EN.md	
+++ b/solution/0100-0199/0103.Binary Tree Zigzag Level Order Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [[3],[20,9],[15,7]]
diff --git a/solution/0100-0199/0104.Maximum Depth of Binary Tree/README_EN.md b/solution/0100-0199/0104.Maximum Depth of Binary Tree/README_EN.md
index 7c0578abdb3ba..0f998376fda7f 100644
--- a/solution/0100-0199/0104.Maximum Depth of Binary Tree/README_EN.md	
+++ b/solution/0100-0199/0104.Maximum Depth of Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0104.Maximum%20Depth%20of%20Binary%20Tree/images/tmp-tree.jpg" style="width: 400px; height: 277px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0104.Maximum%20Depth%20of%20Binary%20Tree/images/tmp-tree.jpg" style="width: 400px; height: 277px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> 3
diff --git a/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README.md b/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README.md
index 9aba5ecf6736d..5bbcb60b6906c 100644
--- a/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README.md	
+++ b/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0105.Construct%20Binary%20Tree%20from%20Preorder%20and%20Inorder%20Traversal/images/tree.jpg" style="height: 302px; width: 277px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0105.Construct%20Binary%20Tree%20from%20Preorder%20and%20Inorder%20Traversal/images/tree.jpg" style="height: 302px; width: 277px;" />
 <pre>
 <strong>输入</strong><strong>:</strong> preorder = [3,9,20,15,7], inorder = [9,3,15,20,7]
 <strong>输出:</strong> [3,9,20,null,null,15,7]
diff --git a/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README_EN.md b/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README_EN.md
index d9cf003faaf03..f58f116436412 100644
--- a/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README_EN.md	
+++ b/solution/0100-0199/0105.Construct Binary Tree from Preorder and Inorder Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0105.Construct%20Binary%20Tree%20from%20Preorder%20and%20Inorder%20Traversal/images/tree.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0105.Construct%20Binary%20Tree%20from%20Preorder%20and%20Inorder%20Traversal/images/tree.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> preorder = [3,9,20,15,7], inorder = [9,3,15,20,7]
 <strong>Output:</strong> [3,9,20,null,null,15,7]
diff --git a/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README.md b/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README.md
index b47624a80b1b1..ebe52457502f3 100644
--- a/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README.md	
+++ b/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0106.Construct%20Binary%20Tree%20from%20Inorder%20and%20Postorder%20Traversal/images/tree.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0106.Construct%20Binary%20Tree%20from%20Inorder%20and%20Postorder%20Traversal/images/tree.jpg" />
 <pre>
 <b>输入：</b>inorder = [9,3,15,20,7], postorder = [9,15,7,20,3]
 <b>输出：</b>[3,9,20,null,null,15,7]
diff --git a/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README_EN.md b/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README_EN.md
index 0720d56d16f15..dd258e1ea7ac1 100644
--- a/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README_EN.md	
+++ b/solution/0100-0199/0106.Construct Binary Tree from Inorder and Postorder Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0106.Construct%20Binary%20Tree%20from%20Inorder%20and%20Postorder%20Traversal/images/tree.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0106.Construct%20Binary%20Tree%20from%20Inorder%20and%20Postorder%20Traversal/images/tree.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> inorder = [9,3,15,20,7], postorder = [9,15,7,20,3]
 <strong>Output:</strong> [3,9,20,null,null,15,7]
diff --git a/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README.md b/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README.md
index 905e1d5ccc803..ab06604d930b2 100644
--- a/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README.md	
+++ b/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0107.Binary%20Tree%20Level%20Order%20Traversal%20II/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0107.Binary%20Tree%20Level%20Order%20Traversal%20II/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>[[15,7],[9,20],[3]]
diff --git a/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README_EN.md b/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README_EN.md
index 1c48062638bf9..f7ce86a124042 100644
--- a/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README_EN.md	
+++ b/solution/0100-0199/0107.Binary Tree Level Order Traversal II/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0107.Binary%20Tree%20Level%20Order%20Traversal%20II/images/tree1.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0107.Binary%20Tree%20Level%20Order%20Traversal%20II/images/tree1.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [[15,7],[9,20],[3]]
diff --git a/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README.md b/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README.md
index 03c3fda782e5f..e08af8c999a4b 100644
--- a/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README.md	
+++ b/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README.md	
@@ -13,16 +13,16 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree1.jpg" style="width: 302px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree1.jpg" style="width: 302px; height: 222px;" />
 <pre>
 <strong>输入：</strong>nums = [-10,-3,0,5,9]
 <strong>输出：</strong>[0,-3,9,-10,null,5]
 <strong>解释：</strong>[0,-10,5,null,-3,null,9] 也将被视为正确答案：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree2.jpg" style="width: 302px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree2.jpg" style="width: 302px; height: 222px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree.jpg" style="width: 342px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree.jpg" style="width: 342px; height: 142px;" />
 <pre>
 <strong>输入：</strong>nums = [1,3]
 <strong>输出：</strong>[3,1]
diff --git a/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README_EN.md b/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README_EN.md
index 9acd0a4c30771..5fd6452a2b92d 100644
--- a/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README_EN.md	
+++ b/solution/0100-0199/0108.Convert Sorted Array to Binary Search Tree/README_EN.md	
@@ -10,16 +10,16 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree1.jpg" style="width: 302px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree1.jpg" style="width: 302px; height: 222px;" />
 <pre>
 <strong>Input:</strong> nums = [-10,-3,0,5,9]
 <strong>Output:</strong> [0,-3,9,-10,null,5]
 <strong>Explanation:</strong> [0,-10,5,null,-3,null,9] is also accepted:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree2.jpg" style="width: 302px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree2.jpg" style="width: 302px; height: 222px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree.jpg" style="width: 342px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/images/btree.jpg" style="width: 342px; height: 142px;" />
 <pre>
 <strong>Input:</strong> nums = [1,3]
 <strong>Output:</strong> [3,1]
diff --git a/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README.md b/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README.md
index 970efb1bd4178..132de1eb2774c 100644
--- a/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README.md	
+++ b/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0109.Convert%20Sorted%20List%20to%20Binary%20Search%20Tree/images/linked.jpg" style="height: 388px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0109.Convert%20Sorted%20List%20to%20Binary%20Search%20Tree/images/linked.jpg" style="height: 388px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> head = [-10,-3,0,5,9]
diff --git a/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README_EN.md b/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README_EN.md
index 1c6035b68f7cf..9c9bbf804255c 100644
--- a/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README_EN.md	
+++ b/solution/0100-0199/0109.Convert Sorted List to Binary Search Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0109.Convert%20Sorted%20List%20to%20Binary%20Search%20Tree/images/linked.jpg" style="width: 500px; height: 388px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0109.Convert%20Sorted%20List%20to%20Binary%20Search%20Tree/images/linked.jpg" style="width: 500px; height: 388px;" />
 <pre>
 <strong>Input:</strong> head = [-10,-3,0,5,9]
 <strong>Output:</strong> [0,-3,9,-10,null,5]
diff --git a/solution/0100-0199/0110.Balanced Binary Tree/README.md b/solution/0100-0199/0110.Balanced Binary Tree/README.md
index 04b55a8245d4a..b4adb1593784b 100644
--- a/solution/0100-0199/0110.Balanced Binary Tree/README.md	
+++ b/solution/0100-0199/0110.Balanced Binary Tree/README.md	
@@ -17,14 +17,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_1.jpg" style="width: 342px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_1.jpg" style="width: 342px; height: 221px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_2.jpg" style="width: 452px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_2.jpg" style="width: 452px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,2,3,3,null,null,4,4]
 <strong>输出：</strong>false
diff --git a/solution/0100-0199/0110.Balanced Binary Tree/README_EN.md b/solution/0100-0199/0110.Balanced Binary Tree/README_EN.md
index d06b03645b944..8bc8b6eed32bb 100644
--- a/solution/0100-0199/0110.Balanced Binary Tree/README_EN.md	
+++ b/solution/0100-0199/0110.Balanced Binary Tree/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_1.jpg" style="width: 342px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_1.jpg" style="width: 342px; height: 221px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_2.jpg" style="width: 452px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0110.Balanced%20Binary%20Tree/images/balance_2.jpg" style="width: 452px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,2,3,3,null,null,4,4]
 <strong>Output:</strong> false
diff --git a/solution/0100-0199/0111.Minimum Depth of Binary Tree/README.md b/solution/0100-0199/0111.Minimum Depth of Binary Tree/README.md
index 18738631c4828..4bed662c4a9f8 100644
--- a/solution/0100-0199/0111.Minimum Depth of Binary Tree/README.md	
+++ b/solution/0100-0199/0111.Minimum Depth of Binary Tree/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0111.Minimum%20Depth%20of%20Binary%20Tree/images/ex_depth.jpg" style="width: 432px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0111.Minimum%20Depth%20of%20Binary%20Tree/images/ex_depth.jpg" style="width: 432px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>2
diff --git a/solution/0100-0199/0111.Minimum Depth of Binary Tree/README_EN.md b/solution/0100-0199/0111.Minimum Depth of Binary Tree/README_EN.md
index 859f598fd451f..9158bde40e8e2 100644
--- a/solution/0100-0199/0111.Minimum Depth of Binary Tree/README_EN.md	
+++ b/solution/0100-0199/0111.Minimum Depth of Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0111.Minimum%20Depth%20of%20Binary%20Tree/images/ex_depth.jpg" style="width: 432px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0111.Minimum%20Depth%20of%20Binary%20Tree/images/ex_depth.jpg" style="width: 432px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> 2
diff --git a/solution/0100-0199/0112.Path Sum/README.md b/solution/0100-0199/0112.Path Sum/README.md
index 382745c5f09fe..7853075f20371 100644
--- a/solution/0100-0199/0112.Path Sum/README.md	
+++ b/solution/0100-0199/0112.Path Sum/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum1.jpg" style="width: 500px; height: 356px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum1.jpg" style="width: 500px; height: 356px;" />
 <pre>
 <strong>输入：</strong>root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22
 <strong>输出：</strong>true
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum2.jpg" />
 <pre>
 <strong>输入：</strong>root = [1,2,3], targetSum = 5
 <strong>输出：</strong>false
diff --git a/solution/0100-0199/0112.Path Sum/README_EN.md b/solution/0100-0199/0112.Path Sum/README_EN.md
index c4b9d9c66c387..c12819322c42d 100644
--- a/solution/0100-0199/0112.Path Sum/README_EN.md	
+++ b/solution/0100-0199/0112.Path Sum/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum1.jpg" style="width: 500px; height: 356px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum1.jpg" style="width: 500px; height: 356px;" />
 <pre>
 <strong>Input:</strong> root = [5,4,8,11,null,13,4,7,2,null,null,null,1], targetSum = 22
 <strong>Output:</strong> true
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0112.Path%20Sum/images/pathsum2.jpg" />
 <pre>
 <strong>Input:</strong> root = [1,2,3], targetSum = 5
 <strong>Output:</strong> false
diff --git a/solution/0100-0199/0113.Path Sum II/README.md b/solution/0100-0199/0113.Path Sum II/README.md
index ab4a46565a297..8269d3259a0bf 100644
--- a/solution/0100-0199/0113.Path Sum II/README.md	
+++ b/solution/0100-0199/0113.Path Sum II/README.md	
@@ -15,14 +15,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsumii1.jpg" style="width: 500px; height: 356px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsumii1.jpg" style="width: 500px; height: 356px;" />
 <pre>
 <strong>输入：</strong>root = [5,4,8,11,null,13,4,7,2,null,null,5,1], targetSum = 22
 <strong>输出：</strong>[[5,4,11,2],[5,8,4,5]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsum2.jpg" style="width: 212px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsum2.jpg" style="width: 212px; height: 181px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3], targetSum = 5
 <strong>输出：</strong>[]
diff --git a/solution/0100-0199/0113.Path Sum II/README_EN.md b/solution/0100-0199/0113.Path Sum II/README_EN.md
index 42ac3622cf626..c05d63787dd07 100644
--- a/solution/0100-0199/0113.Path Sum II/README_EN.md	
+++ b/solution/0100-0199/0113.Path Sum II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsumii1.jpg" style="width: 500px; height: 356px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsumii1.jpg" style="width: 500px; height: 356px;" />
 <pre>
 <strong>Input:</strong> root = [5,4,8,11,null,13,4,7,2,null,null,5,1], targetSum = 22
 <strong>Output:</strong> [[5,4,11,2],[5,8,4,5]]
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsum2.jpg" style="width: 212px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0113.Path%20Sum%20II/images/pathsum2.jpg" style="width: 212px; height: 181px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3], targetSum = 5
 <strong>Output:</strong> []
diff --git a/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README.md b/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README.md
index 4438fcbd7eff4..0d85ac6020817 100644
--- a/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README.md	
+++ b/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README.md	
@@ -16,7 +16,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0114.Flatten%20Binary%20Tree%20to%20Linked%20List/images/flaten.jpg" style="width: 500px; height: 226px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0114.Flatten%20Binary%20Tree%20to%20Linked%20List/images/flaten.jpg" style="width: 500px; height: 226px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,5,3,4,null,6]
 <strong>输出：</strong>[1,null,2,null,3,null,4,null,5,null,6]
diff --git a/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README_EN.md b/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README_EN.md
index 055cbf9d13478..371c06da7890d 100644
--- a/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README_EN.md	
+++ b/solution/0100-0199/0114.Flatten Binary Tree to Linked List/README_EN.md	
@@ -13,7 +13,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0114.Flatten%20Binary%20Tree%20to%20Linked%20List/images/flaten.jpg" style="width: 500px; height: 226px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0114.Flatten%20Binary%20Tree%20to%20Linked%20List/images/flaten.jpg" style="width: 500px; height: 226px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,5,3,4,null,6]
 <strong>Output:</strong> [1,null,2,null,3,null,4,null,5,null,6]
diff --git a/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README.md b/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README.md
index 740c7d3cc96b8..a6f033a511aec 100644
--- a/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README.md	
+++ b/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README.md	
@@ -24,7 +24,7 @@ struct Node {
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/images/116_sample.png" style="height: 171px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/images/116_sample.png" style="height: 171px; width: 500px;" /></p>
 
 <pre>
 <b>输入：</b>root = [1,2,3,4,5,6,7]
diff --git a/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README_EN.md b/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README_EN.md
index 85c9b281ed40d..255e7e01006dc 100644
--- a/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README_EN.md	
+++ b/solution/0100-0199/0116.Populating Next Right Pointers in Each Node/README_EN.md	
@@ -21,7 +21,7 @@ struct Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/images/116_sample.png" style="width: 500px; height: 171px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/images/116_sample.png" style="width: 500px; height: 171px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,7]
 <strong>Output:</strong> [1,#,2,3,#,4,5,6,7,#]
diff --git a/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README.md b/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README.md
index e93618dd3041b..a9a1b76080d15 100644
--- a/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README.md	
+++ b/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README.md	
@@ -33,7 +33,7 @@ struct Node {
 
 <p><strong>示例：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/images/117_sample.png" style="height: 218px; width: 640px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/images/117_sample.png" style="height: 218px; width: 640px;" /></p>
 
 <pre>
 <strong>输入</strong>：root = [1,2,3,4,5,null,7]
diff --git a/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README_EN.md b/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README_EN.md
index 67f11caa34f68..de34f8087e0fb 100644
--- a/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README_EN.md	
+++ b/solution/0100-0199/0117.Populating Next Right Pointers in Each Node II/README_EN.md	
@@ -21,7 +21,7 @@ struct Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/images/117_sample.png" style="width: 500px; height: 171px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/images/117_sample.png" style="width: 500px; height: 171px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,null,7]
 <strong>Output:</strong> [1,#,2,3,#,4,5,7,#]
diff --git a/solution/0100-0199/0118.Pascal's Triangle/README.md b/solution/0100-0199/0118.Pascal's Triangle/README.md
index edbefc5930b5b..6aeae161e4fec 100644
--- a/solution/0100-0199/0118.Pascal's Triangle/README.md	
+++ b/solution/0100-0199/0118.Pascal's Triangle/README.md	
@@ -10,7 +10,7 @@
 
 <p><small>在「杨辉三角」中，每个数是它左上方和右上方的数的和。</small></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0118.Pascal%27s%20Triangle/images/1626927345-DZmfxB-PascalTriangleAnimated2.gif" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0118.Pascal%27s%20Triangle/images/1626927345-DZmfxB-PascalTriangleAnimated2.gif" /></p>
 
 <p> </p>
 
diff --git a/solution/0100-0199/0118.Pascal's Triangle/README_EN.md b/solution/0100-0199/0118.Pascal's Triangle/README_EN.md
index 9db9a128385e3..6ef7c5bd71a93 100644
--- a/solution/0100-0199/0118.Pascal's Triangle/README_EN.md	
+++ b/solution/0100-0199/0118.Pascal's Triangle/README_EN.md	
@@ -7,7 +7,7 @@
 <p>Given an integer <code>numRows</code>, return the first numRows of <strong>Pascal&#39;s triangle</strong>.</p>
 
 <p>In <strong>Pascal&#39;s triangle</strong>, each number is the sum of the two numbers directly above it as shown:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0118.Pascal%27s%20Triangle/images/PascalTriangleAnimated2.gif" style="height:240px; width:260px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0118.Pascal%27s%20Triangle/images/PascalTriangleAnimated2.gif" style="height:240px; width:260px" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 <pre><strong>Input:</strong> numRows = 5
diff --git a/solution/0100-0199/0119.Pascal's Triangle II/README.md b/solution/0100-0199/0119.Pascal's Triangle II/README.md
index be71c52082749..786bba3b050e1 100644
--- a/solution/0100-0199/0119.Pascal's Triangle II/README.md	
+++ b/solution/0100-0199/0119.Pascal's Triangle II/README.md	
@@ -10,7 +10,7 @@
 
 <p><small>在「杨辉三角」中，每个数是它左上方和右上方的数的和。</small></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0119.Pascal%27s%20Triangle%20II/images/1626927345-DZmfxB-PascalTriangleAnimated2.gif" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0119.Pascal%27s%20Triangle%20II/images/1626927345-DZmfxB-PascalTriangleAnimated2.gif" /></p>
 
 <p> </p>
 
diff --git a/solution/0100-0199/0119.Pascal's Triangle II/README_EN.md b/solution/0100-0199/0119.Pascal's Triangle II/README_EN.md
index d2c7efaac7fdd..81ad9ee196306 100644
--- a/solution/0100-0199/0119.Pascal's Triangle II/README_EN.md	
+++ b/solution/0100-0199/0119.Pascal's Triangle II/README_EN.md	
@@ -7,7 +7,7 @@
 <p>Given an integer <code>rowIndex</code>, return the <code>rowIndex<sup>th</sup></code> (<strong>0-indexed</strong>) row of the <strong>Pascal&#39;s triangle</strong>.</p>
 
 <p>In <strong>Pascal&#39;s triangle</strong>, each number is the sum of the two numbers directly above it as shown:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0119.Pascal%27s%20Triangle%20II/images/PascalTriangleAnimated2.gif" style="height:240px; width:260px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0119.Pascal%27s%20Triangle%20II/images/PascalTriangleAnimated2.gif" style="height:240px; width:260px" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 <pre><strong>Input:</strong> rowIndex = 3
diff --git a/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README.md b/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README.md
index c6cfddebd41c8..1602f2f939900 100644
--- a/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README.md	
+++ b/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README.md	
@@ -15,14 +15,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx1.jpg" style="width: 322px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx1.jpg" style="width: 322px; height: 182px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3]
 <strong>输出：</strong>6
 <strong>解释：</strong>最优路径是 2 -> 1 -> 3 ，路径和为 2 + 1 + 3 = 6</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx2.jpg" />
 <pre>
 <strong>输入：</strong>root = [-10,9,20,null,null,15,7]
 <strong>输出：</strong>42
diff --git a/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README_EN.md b/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README_EN.md
index 05edb360895d4..e95c02ec02865 100644
--- a/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README_EN.md	
+++ b/solution/0100-0199/0124.Binary Tree Maximum Path Sum/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx1.jpg" style="width: 322px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx1.jpg" style="width: 322px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3]
 <strong>Output:</strong> 6
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0124.Binary%20Tree%20Maximum%20Path%20Sum/images/exx2.jpg" />
 <pre>
 <strong>Input:</strong> root = [-10,9,20,null,null,15,7]
 <strong>Output:</strong> 42
diff --git a/solution/0100-0199/0129.Sum Root to Leaf Numbers/README.md b/solution/0100-0199/0129.Sum Root to Leaf Numbers/README.md
index 9b476107b6852..77831cb5f68c6 100644
--- a/solution/0100-0199/0129.Sum Root to Leaf Numbers/README.md	
+++ b/solution/0100-0199/0129.Sum Root to Leaf Numbers/README.md	
@@ -23,7 +23,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num1tree.jpg" style="width: 212px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num1tree.jpg" style="width: 212px; height: 182px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3]
 <strong>输出：</strong>25
@@ -33,7 +33,7 @@
 因此，数字总和 = 12 + 13 = <code>25</code></pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num2tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num2tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [4,9,0,5,1]
 <strong>输出：</strong>1026
diff --git a/solution/0100-0199/0129.Sum Root to Leaf Numbers/README_EN.md b/solution/0100-0199/0129.Sum Root to Leaf Numbers/README_EN.md
index 6dd30118e19f2..d1881506dd7dd 100644
--- a/solution/0100-0199/0129.Sum Root to Leaf Numbers/README_EN.md	
+++ b/solution/0100-0199/0129.Sum Root to Leaf Numbers/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num1tree.jpg" style="width: 212px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num1tree.jpg" style="width: 212px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3]
 <strong>Output:</strong> 25
@@ -29,7 +29,7 @@ Therefore, sum = 12 + 13 = <code>25</code>.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num2tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0129.Sum%20Root%20to%20Leaf%20Numbers/images/num2tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [4,9,0,5,1]
 <strong>Output:</strong> 1026
diff --git a/solution/0100-0199/0130.Surrounded Regions/README.md b/solution/0100-0199/0130.Surrounded Regions/README.md
index 225d83322f7be..c851e717e24ff 100644
--- a/solution/0100-0199/0130.Surrounded Regions/README.md	
+++ b/solution/0100-0199/0130.Surrounded Regions/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0130.Surrounded%20Regions/images/xogrid.jpg" style="width: 550px; height: 237px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0130.Surrounded%20Regions/images/xogrid.jpg" style="width: 550px; height: 237px;" />
 <pre>
 <strong>输入：</strong>board = [["X","X","X","X"],["X","O","O","X"],["X","X","O","X"],["X","O","X","X"]]
 <strong>输出：</strong>[["X","X","X","X"],["X","X","X","X"],["X","X","X","X"],["X","O","X","X"]]
diff --git a/solution/0100-0199/0130.Surrounded Regions/README_EN.md b/solution/0100-0199/0130.Surrounded Regions/README_EN.md
index 17c179457093b..d26b8e5aa60fc 100644
--- a/solution/0100-0199/0130.Surrounded Regions/README_EN.md	
+++ b/solution/0100-0199/0130.Surrounded Regions/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0130.Surrounded%20Regions/images/xogrid.jpg" style="width: 550px; height: 237px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0130.Surrounded%20Regions/images/xogrid.jpg" style="width: 550px; height: 237px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;X&quot;,&quot;X&quot;]]
 <strong>Output:</strong> [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;X&quot;,&quot;X&quot;]]
diff --git a/solution/0100-0199/0133.Clone Graph/README.md b/solution/0100-0199/0133.Clone Graph/README.md
index 0c8c5dd9e698e..3ec49e83e8379 100644
--- a/solution/0100-0199/0133.Clone Graph/README.md	
+++ b/solution/0100-0199/0133.Clone Graph/README.md	
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/133_clone_graph_question.png" style="height: 500px; width: 500px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/133_clone_graph_question.png" style="height: 500px; width: 500px;"></p>
 
 <pre><strong>输入：</strong>adjList = [[2,4],[1,3],[2,4],[1,3]]
 <strong>输出：</strong>[[2,4],[1,3],[2,4],[1,3]]
@@ -43,7 +43,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph.png" style="height: 148px; width: 163px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph.png" style="height: 148px; width: 163px;"></p>
 
 <pre><strong>输入：</strong>adjList = [[]]
 <strong>输出：</strong>[[]]
@@ -59,7 +59,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph-1.png" style="height: 133px; width: 272px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph-1.png" style="height: 133px; width: 272px;"></p>
 
 <pre><strong>输入：</strong>adjList = [[2],[1]]
 <strong>输出：</strong>[[2],[1]]</pre>
diff --git a/solution/0100-0199/0133.Clone Graph/README_EN.md b/solution/0100-0199/0133.Clone Graph/README_EN.md
index 8229017e89077..1add7cbcc88bc 100644
--- a/solution/0100-0199/0133.Clone Graph/README_EN.md	
+++ b/solution/0100-0199/0133.Clone Graph/README_EN.md	
@@ -29,7 +29,7 @@ class Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/133_clone_graph_question.png" style="width: 454px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/133_clone_graph_question.png" style="width: 454px; height: 500px;" />
 <pre>
 <strong>Input:</strong> adjList = [[2,4],[1,3],[2,4],[1,3]]
 <strong>Output:</strong> [[2,4],[1,3],[2,4],[1,3]]
@@ -41,7 +41,7 @@ class Node {
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph.png" style="width: 163px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0133.Clone%20Graph/images/graph.png" style="width: 163px; height: 148px;" />
 <pre>
 <strong>Input:</strong> adjList = [[]]
 <strong>Output:</strong> [[]]
diff --git a/solution/0100-0199/0138.Copy List with Random Pointer/README.md b/solution/0100-0199/0138.Copy List with Random Pointer/README.md
index 68ef1e3be0163..a6edc71606468 100644
--- a/solution/0100-0199/0138.Copy List with Random Pointer/README.md	
+++ b/solution/0100-0199/0138.Copy List with Random Pointer/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e1.png" style="height: 142px; width: 700px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e1.png" style="height: 142px; width: 700px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [[7,null],[13,0],[11,4],[10,2],[1,0]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e2.png" style="height: 114px; width: 700px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e2.png" style="height: 114px; width: 700px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [[1,1],[2,1]]
@@ -45,7 +45,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e3.png" style="height: 122px; width: 700px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e3.png" style="height: 122px; width: 700px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>head = [[3,null],[3,0],[3,null]]
diff --git a/solution/0100-0199/0138.Copy List with Random Pointer/README_EN.md b/solution/0100-0199/0138.Copy List with Random Pointer/README_EN.md
index 2373c67d6e1cf..f72a2e95a5b36 100644
--- a/solution/0100-0199/0138.Copy List with Random Pointer/README_EN.md	
+++ b/solution/0100-0199/0138.Copy List with Random Pointer/README_EN.md	
@@ -23,14 +23,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e1.png" style="width: 700px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e1.png" style="width: 700px; height: 142px;" />
 <pre>
 <strong>Input:</strong> head = [[7,null],[13,0],[11,4],[10,2],[1,0]]
 <strong>Output:</strong> [[7,null],[13,0],[11,4],[10,2],[1,0]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e2.png" style="width: 700px; height: 114px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e2.png" style="width: 700px; height: 114px;" />
 <pre>
 <strong>Input:</strong> head = [[1,1],[2,1]]
 <strong>Output:</strong> [[1,1],[2,1]]
@@ -38,7 +38,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e3.png" style="width: 700px; height: 122px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0138.Copy%20List%20with%20Random%20Pointer/images/e3.png" style="width: 700px; height: 122px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> head = [[3,null],[3,0],[3,null]]
diff --git a/solution/0100-0199/0141.Linked List Cycle/README.md b/solution/0100-0199/0141.Linked List Cycle/README.md
index 4f92f06ed1ff1..89d6e3bbe2b25 100644
--- a/solution/0100-0199/0141.Linked List Cycle/README.md	
+++ b/solution/0100-0199/0141.Linked List Cycle/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [3,2,0,-4], pos = 1
@@ -26,7 +26,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test2.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2], pos = 0
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test3.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test3.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1], pos = -1
diff --git a/solution/0100-0199/0141.Linked List Cycle/README_EN.md b/solution/0100-0199/0141.Linked List Cycle/README_EN.md
index 064858ab84ff3..c9a4efd89fe94 100644
--- a/solution/0100-0199/0141.Linked List Cycle/README_EN.md	
+++ b/solution/0100-0199/0141.Linked List Cycle/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist.png" style="width: 300px; height: 97px; margin-top: 8px; margin-bottom: 8px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist.png" style="width: 300px; height: 97px; margin-top: 8px; margin-bottom: 8px;" />
 <pre>
 <strong>Input:</strong> head = [3,2,0,-4], pos = 1
 <strong>Output:</strong> true
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test2.png" style="width: 141px; height: 74px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test2.png" style="width: 141px; height: 74px;" />
 <pre>
 <strong>Input:</strong> head = [1,2], pos = 0
 <strong>Output:</strong> true
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test3.png" style="width: 45px; height: 45px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0141.Linked%20List%20Cycle/images/circularlinkedlist_test3.png" style="width: 45px; height: 45px;" />
 <pre>
 <strong>Input:</strong> head = [1], pos = -1
 <strong>Output:</strong> false
diff --git a/solution/0100-0199/0142.Linked List Cycle II/README.md b/solution/0100-0199/0142.Linked List Cycle II/README.md
index e53f2b1c6548f..7776c31a36ca1 100644
--- a/solution/0100-0199/0142.Linked List Cycle II/README.md	
+++ b/solution/0100-0199/0142.Linked List Cycle II/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [3,2,0,-4], pos = 1
@@ -29,7 +29,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test2.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2], pos = 0
@@ -39,7 +39,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test3.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test3.png" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1], pos = -1
diff --git a/solution/0100-0199/0142.Linked List Cycle II/README_EN.md b/solution/0100-0199/0142.Linked List Cycle II/README_EN.md
index 1ae8d4a052aed..f98e620098d10 100644
--- a/solution/0100-0199/0142.Linked List Cycle II/README_EN.md	
+++ b/solution/0100-0199/0142.Linked List Cycle II/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist.png" style="height: 145px; width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist.png" style="height: 145px; width: 450px;" />
 <pre>
 <strong>Input:</strong> head = [3,2,0,-4], pos = 1
 <strong>Output:</strong> tail connects to node index 1
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test2.png" style="height: 105px; width: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test2.png" style="height: 105px; width: 201px;" />
 <pre>
 <strong>Input:</strong> head = [1,2], pos = 0
 <strong>Output:</strong> tail connects to node index 0
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test3.png" style="height: 65px; width: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0142.Linked%20List%20Cycle%20II/images/circularlinkedlist_test3.png" style="height: 65px; width: 65px;" />
 <pre>
 <strong>Input:</strong> head = [1], pos = -1
 <strong>Output:</strong> no cycle
diff --git a/solution/0100-0199/0143.Reorder List/README.md b/solution/0100-0199/0143.Reorder List/README.md
index 5dde79b9d007d..ba1c84ab7940d 100644
--- a/solution/0100-0199/0143.Reorder List/README.md	
+++ b/solution/0100-0199/0143.Reorder List/README.md	
@@ -23,7 +23,7 @@ L<sub>0</sub> → L<sub>n</sub> → L<sub>1</sub> → L<sub>n - 1</sub> → L<su
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/1626420311-PkUiGI-image.png" style="width: 240px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/1626420311-PkUiGI-image.png" style="width: 240px; " /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4]
@@ -31,7 +31,7 @@ L<sub>0</sub> → L<sub>n</sub> → L<sub>1</sub> → L<sub>n - 1</sub> → L<su
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/1626420320-YUiulT-image.png" style="width: 320px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/1626420320-YUiulT-image.png" style="width: 320px; " /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5]
diff --git a/solution/0100-0199/0143.Reorder List/README_EN.md b/solution/0100-0199/0143.Reorder List/README_EN.md
index 2b3f006aea40b..cf74e8a8aea81 100644
--- a/solution/0100-0199/0143.Reorder List/README_EN.md	
+++ b/solution/0100-0199/0143.Reorder List/README_EN.md	
@@ -20,14 +20,14 @@ L<sub>0</sub> &rarr; L<sub>n</sub> &rarr; L<sub>1</sub> &rarr; L<sub>n - 1</sub>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/reorder1linked-list.jpg" style="width: 422px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/reorder1linked-list.jpg" style="width: 422px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4]
 <strong>Output:</strong> [1,4,2,3]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/reorder2-linked-list.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0143.Reorder%20List/images/reorder2-linked-list.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5]
 <strong>Output:</strong> [1,5,2,4,3]
diff --git a/solution/0100-0199/0144.Binary Tree Preorder Traversal/README.md b/solution/0100-0199/0144.Binary Tree Preorder Traversal/README.md
index a719bccf5ebe8..120acb4f6f1ff 100644
--- a/solution/0100-0199/0144.Binary Tree Preorder Traversal/README.md	
+++ b/solution/0100-0199/0144.Binary Tree Preorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_1.jpg" style="width: 202px; height: 324px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_1.jpg" style="width: 202px; height: 324px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,3]
 <strong>输出：</strong>[1,2,3]
@@ -32,14 +32,14 @@
 </pre>
 
 <p><strong>示例 4：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_5.jpg" style="width: 202px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_5.jpg" style="width: 202px; height: 202px;" />
 <pre>
 <strong>输入：</strong>root = [1,2]
 <strong>输出：</strong>[1,2]
 </pre>
 
 <p><strong>示例 5：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_4.jpg" style="width: 202px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_4.jpg" style="width: 202px; height: 202px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2]
 <strong>输出：</strong>[1,2]
diff --git a/solution/0100-0199/0144.Binary Tree Preorder Traversal/README_EN.md b/solution/0100-0199/0144.Binary Tree Preorder Traversal/README_EN.md
index c0cdc4e1bb114..b71809589a99f 100644
--- a/solution/0100-0199/0144.Binary Tree Preorder Traversal/README_EN.md	
+++ b/solution/0100-0199/0144.Binary Tree Preorder Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_1.jpg" style="width: 125px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0144.Binary%20Tree%20Preorder%20Traversal/images/inorder_1.jpg" style="width: 125px; height: 200px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3]
 <strong>Output:</strong> [1,2,3]
diff --git a/solution/0100-0199/0145.Binary Tree Postorder Traversal/README.md b/solution/0100-0199/0145.Binary Tree Postorder Traversal/README.md
index b34d5de99d730..f881022e52443 100644
--- a/solution/0100-0199/0145.Binary Tree Postorder Traversal/README.md	
+++ b/solution/0100-0199/0145.Binary Tree Postorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0145.Binary%20Tree%20Postorder%20Traversal/images/pre1.jpg" style="width: 127px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0145.Binary%20Tree%20Postorder%20Traversal/images/pre1.jpg" style="width: 127px; height: 200px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,3]
 <strong>输出：</strong>[3,2,1]
diff --git a/solution/0100-0199/0145.Binary Tree Postorder Traversal/README_EN.md b/solution/0100-0199/0145.Binary Tree Postorder Traversal/README_EN.md
index 863e861814ece..ecee73a23ac80 100644
--- a/solution/0100-0199/0145.Binary Tree Postorder Traversal/README_EN.md	
+++ b/solution/0100-0199/0145.Binary Tree Postorder Traversal/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0145.Binary%20Tree%20Postorder%20Traversal/images/pre1.jpg" style="width: 127px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0145.Binary%20Tree%20Postorder%20Traversal/images/pre1.jpg" style="width: 127px; height: 200px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3]
 <strong>Output:</strong> [3,2,1]
diff --git a/solution/0100-0199/0147.Insertion Sort List/README.md b/solution/0100-0199/0147.Insertion Sort List/README.md
index b0ac1bbcc4c19..d0d4f024ae956 100644
--- a/solution/0100-0199/0147.Insertion Sort List/README.md	
+++ b/solution/0100-0199/0147.Insertion Sort List/README.md	
@@ -20,13 +20,13 @@
 
 <p>对链表进行插入排序。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/Insertion-sort-example-300px.gif" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/Insertion-sort-example-300px.gif" /></p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort1linked-list.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort1linked-list.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> head = [4,2,1,3]
@@ -34,7 +34,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort2linked-list.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort2linked-list.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> head = [-1,5,3,4,0]
diff --git a/solution/0100-0199/0147.Insertion Sort List/README_EN.md b/solution/0100-0199/0147.Insertion Sort List/README_EN.md
index af5f5d12914a3..2a009ef304dd0 100644
--- a/solution/0100-0199/0147.Insertion Sort List/README_EN.md	
+++ b/solution/0100-0199/0147.Insertion Sort List/README_EN.md	
@@ -15,17 +15,17 @@
 </ol>
 
 <p>The following is a graphical example of the insertion sort algorithm. The partially sorted list (black) initially contains only the first element in the list. One element (red) is removed from the input data and inserted in-place into the sorted list with each iteration.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/Insertion-sort-example-300px.gif" style="height:180px; width:300px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/Insertion-sort-example-300px.gif" style="height:180px; width:300px" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort1linked-list.jpg" style="width: 422px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort1linked-list.jpg" style="width: 422px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [4,2,1,3]
 <strong>Output:</strong> [1,2,3,4]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort2linked-list.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0147.Insertion%20Sort%20List/images/sort2linked-list.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [-1,5,3,4,0]
 <strong>Output:</strong> [-1,0,3,4,5]
diff --git a/solution/0100-0199/0148.Sort List/README.md b/solution/0100-0199/0148.Sort List/README.md
index 23d849519e2de..07cdc0dbccd3c 100644
--- a/solution/0100-0199/0148.Sort List/README.md	
+++ b/solution/0100-0199/0148.Sort List/README.md	
@@ -14,14 +14,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_1.jpg" style="width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_1.jpg" style="width: 450px;" />
 <pre>
 <b>输入：</b>head = [4,2,1,3]
 <b>输出：</b>[1,2,3,4]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_2.jpg" style="width: 550px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_2.jpg" style="width: 550px;" />
 <pre>
 <b>输入：</b>head = [-1,5,3,4,0]
 <b>输出：</b>[-1,0,3,4,5]
diff --git a/solution/0100-0199/0148.Sort List/README_EN.md b/solution/0100-0199/0148.Sort List/README_EN.md
index 842c8a574f9cc..61f64c4d03e20 100644
--- a/solution/0100-0199/0148.Sort List/README_EN.md	
+++ b/solution/0100-0199/0148.Sort List/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_1.jpg" style="width: 450px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_1.jpg" style="width: 450px; height: 194px;" />
 <pre>
 <strong>Input:</strong> head = [4,2,1,3]
 <strong>Output:</strong> [1,2,3,4]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_2.jpg" style="width: 550px; height: 184px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0148.Sort%20List/images/sort_list_2.jpg" style="width: 550px; height: 184px;" />
 <pre>
 <strong>Input:</strong> head = [-1,5,3,4,0]
 <strong>Output:</strong> [-1,0,3,4,5]
diff --git a/solution/0100-0199/0149.Max Points on a Line/README.md b/solution/0100-0199/0149.Max Points on a Line/README.md
index 5efa9ddb99a98..7d0ca934af647 100644
--- a/solution/0100-0199/0149.Max Points on a Line/README.md	
+++ b/solution/0100-0199/0149.Max Points on a Line/README.md	
@@ -11,14 +11,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane1.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane1.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>输入：</strong>points = [[1,1],[2,2],[3,3]]
 <strong>输出：</strong>3
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane2.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane2.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>输入：</strong>points = [[1,1],[3,2],[5,3],[4,1],[2,3],[1,4]]
 <strong>输出：</strong>4
diff --git a/solution/0100-0199/0149.Max Points on a Line/README_EN.md b/solution/0100-0199/0149.Max Points on a Line/README_EN.md
index 7501374e70920..f4371268e487e 100644
--- a/solution/0100-0199/0149.Max Points on a Line/README_EN.md	
+++ b/solution/0100-0199/0149.Max Points on a Line/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane1.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane1.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[2,2],[3,3]]
 <strong>Output:</strong> 3
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane2.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0149.Max%20Points%20on%20a%20Line/images/plane2.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[3,2],[5,3],[4,1],[2,3],[1,4]]
 <strong>Output:</strong> 4
diff --git a/solution/0100-0199/0156.Binary Tree Upside Down/README.md b/solution/0100-0199/0156.Binary Tree Upside Down/README.md
index fe09fdf879192..2167d214252be 100644
--- a/solution/0100-0199/0156.Binary Tree Upside Down/README.md	
+++ b/solution/0100-0199/0156.Binary Tree Upside Down/README.md	
@@ -15,13 +15,13 @@
 	<li>原来的根节点变成新的右子节点</li>
 	<li>原来的右子节点变成新的左子节点</li>
 </ol>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/main.jpg" style="width: 600px; height: 95px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/main.jpg" style="width: 600px; height: 95px;" />
 <p>上面的步骤逐层进行。题目数据保证每个右节点都有一个同级节点（即共享同一父节点的左节点）且不存在子节点。</p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/updown.jpg" style="width: 800px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/updown.jpg" style="width: 800px; height: 161px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5]
 <strong>输出：</strong>[4,5,2,null,null,3,1]
diff --git a/solution/0100-0199/0156.Binary Tree Upside Down/README_EN.md b/solution/0100-0199/0156.Binary Tree Upside Down/README_EN.md
index 4715531feb453..dcb419dd8667c 100644
--- a/solution/0100-0199/0156.Binary Tree Upside Down/README_EN.md	
+++ b/solution/0100-0199/0156.Binary Tree Upside Down/README_EN.md	
@@ -13,12 +13,12 @@
 	<li>The original root becomes the new right child.</li>
 	<li>The original right child becomes the new left child.</li>
 </ol>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/main.jpg" style="width: 600px; height: 95px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/main.jpg" style="width: 600px; height: 95px;" />
 <p>The mentioned steps are done level by level. It is <strong>guaranteed</strong> that every right node has a sibling (a left node with the same parent) and has no children.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/updown.jpg" style="width: 800px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0156.Binary%20Tree%20Upside%20Down/images/updown.jpg" style="width: 800px; height: 161px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5]
 <strong>Output:</strong> [4,5,2,null,null,3,1]
diff --git a/solution/0100-0199/0157.Read N Characters Given Read4/README_EN.md b/solution/0100-0199/0157.Read N Characters Given Read4/README_EN.md
index 856240e4eedb8..8bdb12cbce860 100644
--- a/solution/0100-0199/0157.Read N Characters Given Read4/README_EN.md	
+++ b/solution/0100-0199/0157.Read N Characters Given Read4/README_EN.md	
@@ -24,7 +24,7 @@ buf4[] is a destination, not a source. The results from read4 will be copied to
 </pre>
 
 <p>Below is a high-level example of how <code>read4</code> works:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0157.Read%20N%20Characters%20Given%20Read4/images/157_example.png" style="width: 600px; height: 403px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0157.Read%20N%20Characters%20Given%20Read4/images/157_example.png" style="width: 600px; height: 403px;" />
 <pre>
 File file(&quot;abcde<code>&quot;); // File is &quot;</code>abcde<code>&quot;, initially file pointer (fp) points to &#39;a&#39;
 char[] buf4 = new char[4]; // Create buffer with enough space to store characters
diff --git a/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README.md b/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README.md
index 79af0f701c894..8c4fe5cf3d229 100644
--- a/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README.md	
+++ b/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README.md	
@@ -25,7 +25,7 @@
 
 <p>下列是一些使用 <code>read4</code> 的例子：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0158.Read%20N%20Characters%20Given%20read4%20II%20-%20Call%20Multiple%20Times/images/157_example.png" style="height: 403px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0158.Read%20N%20Characters%20Given%20read4%20II%20-%20Call%20Multiple%20Times/images/157_example.png" style="height: 403px; width: 600px;" /></p>
 
 <pre>
 <code>File file("abcde"); // 文件名为 "abcde"， 初始文件指针 (fp) 指向 'a' 
diff --git a/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README_EN.md b/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README_EN.md
index 736bb226cf0b3..9e1d6a38bf438 100644
--- a/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README_EN.md	
+++ b/solution/0100-0199/0158.Read N Characters Given read4 II - Call Multiple Times/README_EN.md	
@@ -24,7 +24,7 @@ buf4[] is a destination, not a source. The results from read4 will be copied to
 </pre>
 
 <p>Below is a high-level example of how <code>read4</code> works:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0158.Read%20N%20Characters%20Given%20read4%20II%20-%20Call%20Multiple%20Times/images/157_example.png" style="width: 600px; height: 403px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0158.Read%20N%20Characters%20Given%20read4%20II%20-%20Call%20Multiple%20Times/images/157_example.png" style="width: 600px; height: 403px;" />
 <pre>
 File file(&quot;abcde<code>&quot;); // File is &quot;</code>abcde<code>&quot;, initially file pointer (fp) points to &#39;a&#39;
 char[] buf4 = new char[4]; // Create buffer with enough space to store characters
diff --git a/solution/0100-0199/0160.Intersection of Two Linked Lists/README.md b/solution/0100-0199/0160.Intersection of Two Linked Lists/README.md
index 9be57f908c0a3..a59408ed141a3 100644
--- a/solution/0100-0199/0160.Intersection of Two Linked Lists/README.md	
+++ b/solution/0100-0199/0160.Intersection of Two Linked Lists/README.md	
@@ -10,7 +10,7 @@
 
 <p>图示两个链表在节点 <code>c1</code> 开始相交<strong>：</strong></p>
 
-<p><a href="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" style="height: 130px; width: 400px;" /></a></p>
+<p><a href="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" style="height: 130px; width: 400px;" /></a></p>
 
 <p>题目数据 <strong>保证</strong> 整个链式结构中不存在环。</p>
 
@@ -34,7 +34,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_1.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_1_1.png" style="height: 130px; width: 400px;" /></a></p>
+<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_1.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_1_1.png" style="height: 130px; width: 400px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal = 8, listA = [4,1,8,4,5], listB = [5,6,1,8,4,5], skipA = 2, skipB = 3
@@ -46,7 +46,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_2.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_2.png" style="height: 136px; width: 350px;" /></a></p>
+<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_2.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_2.png" style="height: 136px; width: 350px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal&nbsp;= 2, listA = [1,9,1,2,4], listB = [3,2,4], skipA = 3, skipB = 1
@@ -58,7 +58,7 @@
 
 <p><strong>示例&nbsp;3：</strong></p>
 
-<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_3.png" target="_blank"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_3.png" style="height: 126px; width: 200px;" /></a></p>
+<p><a href="https://assets.leetcode.com/uploads/2018/12/13/160_example_3.png" target="_blank"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_3.png" style="height: 126px; width: 200px;" /></a></p>
 
 <pre>
 <strong>输入：</strong>intersectVal = 0, listA = [2,6,4], listB = [1,5], skipA = 3, skipB = 2
diff --git a/solution/0100-0199/0160.Intersection of Two Linked Lists/README_EN.md b/solution/0100-0199/0160.Intersection of Two Linked Lists/README_EN.md
index d684b7cbe5592..95cc63462aba2 100644
--- a/solution/0100-0199/0160.Intersection of Two Linked Lists/README_EN.md	
+++ b/solution/0100-0199/0160.Intersection of Two Linked Lists/README_EN.md	
@@ -7,7 +7,7 @@
 <p>Given the heads of two singly linked-lists <code>headA</code> and <code>headB</code>, return <em>the node at which the two lists intersect</em>. If the two linked lists have no intersection at all, return <code>null</code>.</p>
 
 <p>For example, the following two linked lists begin to intersect at node <code>c1</code>:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" style="width: 500px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_statement.png" style="width: 500px; height: 162px;" />
 <p>The test cases are generated such that there are no cycles anywhere in the entire linked structure.</p>
 
 <p><strong>Note</strong> that the linked lists must <strong>retain their original structure</strong> after the function returns.</p>
@@ -28,7 +28,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_1_1.png" style="width: 500px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_1_1.png" style="width: 500px; height: 162px;" />
 <pre>
 <strong>Input:</strong> intersectVal = 8, listA = [4,1,8,4,5], listB = [5,6,1,8,4,5], skipA = 2, skipB = 3
 <strong>Output:</strong> Intersected at &#39;8&#39;
@@ -37,7 +37,7 @@ From the head of A, it reads as [4,1,8,4,5]. From the head of B, it reads as [5,
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_2.png" style="width: 500px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_2.png" style="width: 500px; height: 194px;" />
 <pre>
 <strong>Input:</strong> intersectVal = 2, listA = [1,9,1,2,4], listB = [3,2,4], skipA = 3, skipB = 1
 <strong>Output:</strong> Intersected at &#39;2&#39;
@@ -46,7 +46,7 @@ From the head of A, it reads as [1,9,1,2,4]. From the head of B, it reads as [3,
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_3.png" style="width: 300px; height: 189px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0160.Intersection%20of%20Two%20Linked%20Lists/images/160_example_3.png" style="width: 300px; height: 189px;" />
 <pre>
 <strong>Input:</strong> intersectVal = 0, listA = [2,6,4], listB = [1,5], skipA = 3, skipB = 2
 <strong>Output:</strong> No intersection
diff --git a/solution/0100-0199/0173.Binary Search Tree Iterator/README.md b/solution/0100-0199/0173.Binary Search Tree Iterator/README.md
index 63a300ab2f7be..c66889d0c2963 100644
--- a/solution/0100-0199/0173.Binary Search Tree Iterator/README.md	
+++ b/solution/0100-0199/0173.Binary Search Tree Iterator/README.md	
@@ -25,7 +25,7 @@
 <p> </p>
 
 <p><strong>示例：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0173.Binary%20Search%20Tree%20Iterator/images/bst-tree.png" style="width: 189px; height: 178px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0173.Binary%20Search%20Tree%20Iterator/images/bst-tree.png" style="width: 189px; height: 178px;" />
 <pre>
 <strong>输入</strong>
 ["BSTIterator", "next", "next", "hasNext", "next", "hasNext", "next", "hasNext", "next", "hasNext"]
diff --git a/solution/0100-0199/0173.Binary Search Tree Iterator/README_EN.md b/solution/0100-0199/0173.Binary Search Tree Iterator/README_EN.md
index 489980174ff39..748b3ea5558c6 100644
--- a/solution/0100-0199/0173.Binary Search Tree Iterator/README_EN.md	
+++ b/solution/0100-0199/0173.Binary Search Tree Iterator/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0173.Binary%20Search%20Tree%20Iterator/images/bst-tree.png" style="width: 189px; height: 178px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0173.Binary%20Search%20Tree%20Iterator/images/bst-tree.png" style="width: 189px; height: 178px;" />
 <pre>
 <strong>Input</strong>
 [&quot;BSTIterator&quot;, &quot;next&quot;, &quot;next&quot;, &quot;hasNext&quot;, &quot;next&quot;, &quot;hasNext&quot;, &quot;next&quot;, &quot;hasNext&quot;, &quot;next&quot;, &quot;hasNext&quot;]
diff --git a/solution/0100-0199/0174.Dungeon Game/README_EN.md b/solution/0100-0199/0174.Dungeon Game/README_EN.md
index e6daa64217314..6095f9833014e 100644
--- a/solution/0100-0199/0174.Dungeon Game/README_EN.md	
+++ b/solution/0100-0199/0174.Dungeon Game/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0174.Dungeon%20Game/images/dungeon-grid-1.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0174.Dungeon%20Game/images/dungeon-grid-1.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> dungeon = [[-2,-3,3],[-5,-10,1],[10,30,-5]]
 <strong>Output:</strong> 7
diff --git a/solution/0100-0199/0199.Binary Tree Right Side View/README.md b/solution/0100-0199/0199.Binary Tree Right Side View/README.md
index 9cb72234de76f..f7934cef1f0f3 100644
--- a/solution/0100-0199/0199.Binary Tree Right Side View/README.md	
+++ b/solution/0100-0199/0199.Binary Tree Right Side View/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0199.Binary%20Tree%20Right%20Side%20View/images/tree.jpg" style="width: 270px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0199.Binary%20Tree%20Right%20Side%20View/images/tree.jpg" style="width: 270px; " /></p>
 
 <pre>
 <strong>输入:</strong> [1,2,3,null,5,null,4]
diff --git a/solution/0100-0199/0199.Binary Tree Right Side View/README_EN.md b/solution/0100-0199/0199.Binary Tree Right Side View/README_EN.md
index 30c512b067d72..bbfb61fc1c571 100644
--- a/solution/0100-0199/0199.Binary Tree Right Side View/README_EN.md	
+++ b/solution/0100-0199/0199.Binary Tree Right Side View/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0199.Binary%20Tree%20Right%20Side%20View/images/tree.jpg" style="width: 401px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0100-0199/0199.Binary%20Tree%20Right%20Side%20View/images/tree.jpg" style="width: 401px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,5,null,4]
 <strong>Output:</strong> [1,3,4]
diff --git a/solution/0200-0299/0203.Remove Linked List Elements/README.md b/solution/0200-0299/0203.Remove Linked List Elements/README.md
index 4a53ca74c04b4..bb3cad28014dd 100644
--- a/solution/0200-0299/0203.Remove Linked List Elements/README.md	
+++ b/solution/0200-0299/0203.Remove Linked List Elements/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0203.Remove%20Linked%20List%20Elements/images/removelinked-list.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0203.Remove%20Linked%20List%20Elements/images/removelinked-list.jpg" style="width: 500px; height: 142px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,6,3,4,5,6], val = 6
 <strong>输出：</strong>[1,2,3,4,5]
diff --git a/solution/0200-0299/0203.Remove Linked List Elements/README_EN.md b/solution/0200-0299/0203.Remove Linked List Elements/README_EN.md
index 436bcc401d2fd..6c889eb927424 100644
--- a/solution/0200-0299/0203.Remove Linked List Elements/README_EN.md	
+++ b/solution/0200-0299/0203.Remove Linked List Elements/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0203.Remove%20Linked%20List%20Elements/images/removelinked-list.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0203.Remove%20Linked%20List%20Elements/images/removelinked-list.jpg" style="width: 500px; height: 142px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,6,3,4,5,6], val = 6
 <strong>Output:</strong> [1,2,3,4,5]
diff --git a/solution/0200-0299/0206.Reverse Linked List/README.md b/solution/0200-0299/0206.Reverse Linked List/README.md
index 41a4d9b7dfa16..e6168d92fe3b5 100644
--- a/solution/0200-0299/0206.Reverse Linked List/README.md	
+++ b/solution/0200-0299/0206.Reverse Linked List/README.md	
@@ -13,14 +13,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5]
 <strong>输出：</strong>[5,4,3,2,1]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex2.jpg" style="width: 182px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex2.jpg" style="width: 182px; height: 222px;" />
 <pre>
 <strong>输入：</strong>head = [1,2]
 <strong>输出：</strong>[2,1]
diff --git a/solution/0200-0299/0206.Reverse Linked List/README_EN.md b/solution/0200-0299/0206.Reverse Linked List/README_EN.md
index f489dcf54cad3..9deeda8bec098 100644
--- a/solution/0200-0299/0206.Reverse Linked List/README_EN.md	
+++ b/solution/0200-0299/0206.Reverse Linked List/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex1.jpg" style="width: 542px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex1.jpg" style="width: 542px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5]
 <strong>Output:</strong> [5,4,3,2,1]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex2.jpg" style="width: 182px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0206.Reverse%20Linked%20List/images/rev1ex2.jpg" style="width: 182px; height: 222px;" />
 <pre>
 <strong>Input:</strong> head = [1,2]
 <strong>Output:</strong> [2,1]
diff --git a/solution/0200-0299/0212.Word Search II/README.md b/solution/0200-0299/0212.Word Search II/README.md
index 1346b219ab8fa..3016b0e2ba661 100644
--- a/solution/0200-0299/0212.Word Search II/README.md	
+++ b/solution/0200-0299/0212.Word Search II/README.md	
@@ -13,14 +13,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search1.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search1.jpg" />
 <pre>
 <strong>输入：</strong>board = [["o","a","a","n"],["e","t","a","e"],["i","h","k","r"],["i","f","l","v"]], words = ["oath","pea","eat","rain"]
 <strong>输出：</strong>["eat","oath"]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search2.jpg" />
 <pre>
 <strong>输入：</strong>board = [["a","b"],["c","d"]], words = ["abcb"]
 <strong>输出：</strong>[]
diff --git a/solution/0200-0299/0212.Word Search II/README_EN.md b/solution/0200-0299/0212.Word Search II/README_EN.md
index 1c1a2470ba13b..58503a0feb91e 100644
--- a/solution/0200-0299/0212.Word Search II/README_EN.md	
+++ b/solution/0200-0299/0212.Word Search II/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search1.jpg" style="width: 322px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search1.jpg" style="width: 322px; height: 322px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;o&quot;,&quot;a&quot;,&quot;a&quot;,&quot;n&quot;],[&quot;e&quot;,&quot;t&quot;,&quot;a&quot;,&quot;e&quot;],[&quot;i&quot;,&quot;h&quot;,&quot;k&quot;,&quot;r&quot;],[&quot;i&quot;,&quot;f&quot;,&quot;l&quot;,&quot;v&quot;]], words = [&quot;oath&quot;,&quot;pea&quot;,&quot;eat&quot;,&quot;rain&quot;]
 <strong>Output:</strong> [&quot;eat&quot;,&quot;oath&quot;]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search2.jpg" style="width: 162px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0212.Word%20Search%20II/images/search2.jpg" style="width: 162px; height: 162px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;a&quot;,&quot;b&quot;],[&quot;c&quot;,&quot;d&quot;]], words = [&quot;abcb&quot;]
 <strong>Output:</strong> []
diff --git a/solution/0200-0299/0218.The Skyline Problem/README.md b/solution/0200-0299/0218.The Skyline Problem/README.md
index 33eeab75cf172..efdce3f83901f 100644
--- a/solution/0200-0299/0218.The Skyline Problem/README.md	
+++ b/solution/0200-0299/0218.The Skyline Problem/README.md	
@@ -25,7 +25,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0218.The%20Skyline%20Problem/images/merged.jpg" style="height: 331px; width: 800px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0218.The%20Skyline%20Problem/images/merged.jpg" style="height: 331px; width: 800px;" />
 <pre>
 <strong>输入：</strong>buildings = [[2,9,10],[3,7,15],[5,12,12],[15,20,10],[19,24,8]]
 <strong>输出：</strong>[[2,10],[3,15],[7,12],[12,0],[15,10],[20,8],[24,0]]
diff --git a/solution/0200-0299/0218.The Skyline Problem/README_EN.md b/solution/0200-0299/0218.The Skyline Problem/README_EN.md
index 4be50ae60e7f7..43e68a97a68c6 100644
--- a/solution/0200-0299/0218.The Skyline Problem/README_EN.md	
+++ b/solution/0200-0299/0218.The Skyline Problem/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0218.The%20Skyline%20Problem/images/merged.jpg" style="width: 800px; height: 331px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0218.The%20Skyline%20Problem/images/merged.jpg" style="width: 800px; height: 331px;" />
 <pre>
 <strong>Input:</strong> buildings = [[2,9,10],[3,7,15],[5,12,12],[15,20,10],[19,24,8]]
 <strong>Output:</strong> [[2,10],[3,15],[7,12],[12,0],[15,10],[20,8],[24,0]]
diff --git a/solution/0200-0299/0221.Maximal Square/README.md b/solution/0200-0299/0221.Maximal Square/README.md
index aafca28d6c263..2ec35647bb128 100644
--- a/solution/0200-0299/0221.Maximal Square/README.md	
+++ b/solution/0200-0299/0221.Maximal Square/README.md	
@@ -11,14 +11,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max1grid.jpg" style="width: 400px; height: 319px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max1grid.jpg" style="width: 400px; height: 319px;" />
 <pre>
 <strong>输入：</strong>matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]]
 <strong>输出：</strong>4
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max2grid.jpg" style="width: 165px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max2grid.jpg" style="width: 165px; height: 165px;" />
 <pre>
 <strong>输入：</strong>matrix = [["0","1"],["1","0"]]
 <strong>输出：</strong>1
diff --git a/solution/0200-0299/0221.Maximal Square/README_EN.md b/solution/0200-0299/0221.Maximal Square/README_EN.md
index 05c7ab74c6193..028fbed0420af 100644
--- a/solution/0200-0299/0221.Maximal Square/README_EN.md	
+++ b/solution/0200-0299/0221.Maximal Square/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max1grid.jpg" style="width: 400px; height: 319px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max1grid.jpg" style="width: 400px; height: 319px;" />
 <pre>
 <strong>Input:</strong> matrix = [[&quot;1&quot;,&quot;0&quot;,&quot;1&quot;,&quot;0&quot;,&quot;0&quot;],[&quot;1&quot;,&quot;0&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;],[&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;],[&quot;1&quot;,&quot;0&quot;,&quot;0&quot;,&quot;1&quot;,&quot;0&quot;]]
 <strong>Output:</strong> 4
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max2grid.jpg" style="width: 165px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0221.Maximal%20Square/images/max2grid.jpg" style="width: 165px; height: 165px;" />
 <pre>
 <strong>Input:</strong> matrix = [[&quot;0&quot;,&quot;1&quot;],[&quot;1&quot;,&quot;0&quot;]]
 <strong>Output:</strong> 1
diff --git a/solution/0200-0299/0222.Count Complete Tree Nodes/README.md b/solution/0200-0299/0222.Count Complete Tree Nodes/README.md
index 620c14a6ef102..4b5eb55c8b9cd 100644
--- a/solution/0200-0299/0222.Count Complete Tree Nodes/README.md	
+++ b/solution/0200-0299/0222.Count Complete Tree Nodes/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0222.Count%20Complete%20Tree%20Nodes/images/complete.jpg" style="width: 372px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0222.Count%20Complete%20Tree%20Nodes/images/complete.jpg" style="width: 372px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,6]
 <strong>输出：</strong>6
diff --git a/solution/0200-0299/0222.Count Complete Tree Nodes/README_EN.md b/solution/0200-0299/0222.Count Complete Tree Nodes/README_EN.md
index 4d4ba26977079..8cf0042f120e0 100644
--- a/solution/0200-0299/0222.Count Complete Tree Nodes/README_EN.md	
+++ b/solution/0200-0299/0222.Count Complete Tree Nodes/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0222.Count%20Complete%20Tree%20Nodes/images/complete.jpg" style="width: 372px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0222.Count%20Complete%20Tree%20Nodes/images/complete.jpg" style="width: 372px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6]
 <strong>Output:</strong> 6
diff --git a/solution/0200-0299/0223.Rectangle Area/README.md b/solution/0200-0299/0223.Rectangle Area/README.md
index 95d4b1691218e..0b0f07261fe4f 100644
--- a/solution/0200-0299/0223.Rectangle Area/README.md	
+++ b/solution/0200-0299/0223.Rectangle Area/README.md	
@@ -20,7 +20,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="Rectangle Area" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0223.Rectangle%20Area/images/rectangle-plane.png" style="width: 700px; height: 365px;" />
+<img alt="Rectangle Area" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0223.Rectangle%20Area/images/rectangle-plane.png" style="width: 700px; height: 365px;" />
 <pre>
 <strong>输入：</strong>ax1 = -3, ay1 = 0, ax2 = 3, ay2 = 4, bx1 = 0, by1 = -1, bx2 = 9, by2 = 2
 <strong>输出：</strong>45
diff --git a/solution/0200-0299/0223.Rectangle Area/README_EN.md b/solution/0200-0299/0223.Rectangle Area/README_EN.md
index 8056cf70abea7..bb3463c4e1126 100644
--- a/solution/0200-0299/0223.Rectangle Area/README_EN.md	
+++ b/solution/0200-0299/0223.Rectangle Area/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="Rectangle Area" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0223.Rectangle%20Area/images/rectangle-plane.png" style="width: 700px; height: 365px;" />
+<img alt="Rectangle Area" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0223.Rectangle%20Area/images/rectangle-plane.png" style="width: 700px; height: 365px;" />
 <pre>
 <strong>Input:</strong> ax1 = -3, ay1 = 0, ax2 = 3, ay2 = 4, bx1 = 0, by1 = -1, bx2 = 9, by2 = 2
 <strong>Output:</strong> 45
diff --git a/solution/0200-0299/0226.Invert Binary Tree/README.md b/solution/0200-0299/0226.Invert Binary Tree/README.md
index 29d9c05431b01..f84df43361aef 100644
--- a/solution/0200-0299/0226.Invert Binary Tree/README.md	
+++ b/solution/0200-0299/0226.Invert Binary Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert1-tree.jpg" style="height: 165px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert1-tree.jpg" style="height: 165px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [4,2,7,1,3,6,9]
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert2-tree.jpg" style="width: 500px; height: 120px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert2-tree.jpg" style="width: 500px; height: 120px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,1,3]
diff --git a/solution/0200-0299/0226.Invert Binary Tree/README_EN.md b/solution/0200-0299/0226.Invert Binary Tree/README_EN.md
index bebb351d239c9..8db785b403d39 100644
--- a/solution/0200-0299/0226.Invert Binary Tree/README_EN.md	
+++ b/solution/0200-0299/0226.Invert Binary Tree/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert1-tree.jpg" style="width: 500px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert1-tree.jpg" style="width: 500px; height: 165px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,7,1,3,6,9]
 <strong>Output:</strong> [4,7,2,9,6,3,1]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert2-tree.jpg" style="width: 500px; height: 120px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0226.Invert%20Binary%20Tree/images/invert2-tree.jpg" style="width: 500px; height: 120px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3]
 <strong>Output:</strong> [2,3,1]
diff --git a/solution/0200-0299/0230.Kth Smallest Element in a BST/README.md b/solution/0200-0299/0230.Kth Smallest Element in a BST/README.md
index 6bd6330d490ad..0fde05a39e61f 100644
--- a/solution/0200-0299/0230.Kth Smallest Element in a BST/README.md	
+++ b/solution/0200-0299/0230.Kth Smallest Element in a BST/README.md	
@@ -11,14 +11,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree1.jpg" style="width: 212px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree1.jpg" style="width: 212px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [3,1,4,null,2], k = 1
 <strong>输出：</strong>1
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree2.jpg" style="width: 382px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree2.jpg" style="width: 382px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,null,1], k = 3
 <strong>输出：</strong>3
diff --git a/solution/0200-0299/0230.Kth Smallest Element in a BST/README_EN.md b/solution/0200-0299/0230.Kth Smallest Element in a BST/README_EN.md
index b4258b2565f27..f7bbd161ce0ae 100644
--- a/solution/0200-0299/0230.Kth Smallest Element in a BST/README_EN.md	
+++ b/solution/0200-0299/0230.Kth Smallest Element in a BST/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree1.jpg" style="width: 212px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree1.jpg" style="width: 212px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [3,1,4,null,2], k = 1
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree2.jpg" style="width: 382px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0230.Kth%20Smallest%20Element%20in%20a%20BST/images/kthtree2.jpg" style="width: 382px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,null,1], k = 3
 <strong>Output:</strong> 3
diff --git a/solution/0200-0299/0234.Palindrome Linked List/README.md b/solution/0200-0299/0234.Palindrome Linked List/README.md
index f4af68ff9361c..69f4a8ed318c1 100644
--- a/solution/0200-0299/0234.Palindrome Linked List/README.md	
+++ b/solution/0200-0299/0234.Palindrome Linked List/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal1linked-list.jpg" style="width: 422px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal1linked-list.jpg" style="width: 422px; height: 62px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,2,1]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal2linked-list.jpg" style="width: 182px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal2linked-list.jpg" style="width: 182px; height: 62px;" />
 <pre>
 <strong>输入：</strong>head = [1,2]
 <strong>输出：</strong>false
diff --git a/solution/0200-0299/0234.Palindrome Linked List/README_EN.md b/solution/0200-0299/0234.Palindrome Linked List/README_EN.md
index 0e6a18dc3b8ae..04d0e8a7c9565 100644
--- a/solution/0200-0299/0234.Palindrome Linked List/README_EN.md	
+++ b/solution/0200-0299/0234.Palindrome Linked List/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal1linked-list.jpg" style="width: 422px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal1linked-list.jpg" style="width: 422px; height: 62px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,2,1]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal2linked-list.jpg" style="width: 182px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0234.Palindrome%20Linked%20List/images/pal2linked-list.jpg" style="width: 182px; height: 62px;" />
 <pre>
 <strong>Input:</strong> head = [1,2]
 <strong>Output:</strong> false
diff --git a/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README.md b/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README.md
index 3bc08064fb795..b002a5a3c4de4 100644
--- a/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README.md	
+++ b/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p>例如，给定如下二叉搜索树:&nbsp; root =&nbsp;[6,2,8,0,4,7,9,null,null,3,5]</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="height: 190px; width: 200px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="height: 190px; width: 200px;"></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README_EN.md b/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README_EN.md
index 7ef70fe4c5d3e..38ff61304e953 100644
--- a/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README_EN.md	
+++ b/solution/0200-0299/0235.Lowest Common Ancestor of a Binary Search Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [6,2,8,0,4,7,9,null,null,3,5], p = 2, q = 8
 <strong>Output:</strong> 6
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/images/binarysearchtree_improved.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [6,2,8,0,4,7,9,null,null,3,5], p = 2, q = 4
 <strong>Output:</strong> 2
diff --git a/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README.md b/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README.md
index 012cd1e329af5..db62a6207ae9b 100644
--- a/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README.md	
+++ b/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <strong>输出：</strong>3
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
 <strong>输出：</strong>5
diff --git a/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README_EN.md b/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README_EN.md
index 846a814abf8fe..cf382c699866a 100644
--- a/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README_EN.md	
+++ b/solution/0200-0299/0236.Lowest Common Ancestor of a Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
 <strong>Output:</strong> 5
diff --git a/solution/0200-0299/0237.Delete Node in a Linked List/README.md b/solution/0200-0299/0237.Delete Node in a Linked List/README.md
index b621f541cad14..1cfc3a19db7c1 100644
--- a/solution/0200-0299/0237.Delete Node in a Linked List/README.md	
+++ b/solution/0200-0299/0237.Delete Node in a Linked List/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node1.jpg" style="height: 215px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node1.jpg" style="height: 215px; width: 300px;" />
 <pre>
 <strong>输入：</strong>head = [4,5,1,9], node = 5
 <strong>输出：</strong>[4,1,9]
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node2.jpg" style="height: 236px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node2.jpg" style="height: 236px; width: 300px;" />
 <pre>
 <strong>输入：</strong>head = [4,5,1,9], node = 1
 <strong>输出：</strong>[4,5,9]
diff --git a/solution/0200-0299/0237.Delete Node in a Linked List/README_EN.md b/solution/0200-0299/0237.Delete Node in a Linked List/README_EN.md
index 151183b58c6a0..1bc8c98c31474 100644
--- a/solution/0200-0299/0237.Delete Node in a Linked List/README_EN.md	
+++ b/solution/0200-0299/0237.Delete Node in a Linked List/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node1.jpg" style="width: 300px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node1.jpg" style="width: 300px; height: 215px;" />
 <pre>
 <strong>Input:</strong> head = [4,5,1,9], node = 5
 <strong>Output:</strong> [4,1,9]
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node2.jpg" style="width: 300px; height: 236px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0237.Delete%20Node%20in%20a%20Linked%20List/images/node2.jpg" style="width: 300px; height: 236px;" />
 <pre>
 <strong>Input:</strong> head = [4,5,1,9], node = 1
 <strong>Output:</strong> [4,5,9]
diff --git a/solution/0200-0299/0240.Search a 2D Matrix II/README.md b/solution/0200-0299/0240.Search a 2D Matrix II/README.md
index 4c2f8bf32e48e..a794ba02b0ca5 100644
--- a/solution/0200-0299/0240.Search a 2D Matrix II/README.md	
+++ b/solution/0200-0299/0240.Search a 2D Matrix II/README.md	
@@ -16,14 +16,14 @@
 <p>&nbsp;</p>
 
 <p><b>示例 1：</b></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid2.jpg" />
 <pre>
 <b>输入：</b>matrix = [[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 5
 <b>输出：</b>true
 </pre>
 
 <p><b>示例 2：</b></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid.jpg" />
 <pre>
 <b>输入：</b>matrix = [[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 20
 <b>输出：</b>false
diff --git a/solution/0200-0299/0240.Search a 2D Matrix II/README_EN.md b/solution/0200-0299/0240.Search a 2D Matrix II/README_EN.md
index bf6c57db633df..1b89763c79f82 100644
--- a/solution/0200-0299/0240.Search a 2D Matrix II/README_EN.md	
+++ b/solution/0200-0299/0240.Search a 2D Matrix II/README_EN.md	
@@ -13,14 +13,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid2.jpg" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid2.jpg" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 5
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid.jpg" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0240.Search%20a%202D%20Matrix%20II/images/searchgrid.jpg" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,4,7,11,15],[2,5,8,12,19],[3,6,9,16,22],[10,13,14,17,24],[18,21,23,26,30]], target = 20
 <strong>Output:</strong> false
diff --git a/solution/0200-0299/0250.Count Univalue Subtrees/README_EN.md b/solution/0200-0299/0250.Count Univalue Subtrees/README_EN.md
index f6dbbfe9421b7..d195af21f5349 100644
--- a/solution/0200-0299/0250.Count Univalue Subtrees/README_EN.md	
+++ b/solution/0200-0299/0250.Count Univalue Subtrees/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0250.Count%20Univalue%20Subtrees/images/unival_e1.jpg" style="width: 450px; height: 258px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0250.Count%20Univalue%20Subtrees/images/unival_e1.jpg" style="width: 450px; height: 258px;" />
 <pre>
 <strong>Input:</strong> root = [5,1,5,5,5,null,5]
 <strong>Output:</strong> 4
diff --git a/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README.md b/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README.md
index 5aa3f3ece2cd3..96081a3e325d1 100644
--- a/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README.md	
+++ b/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0255.Verify%20Preorder%20Sequence%20in%20Binary%20Search%20Tree/images/preorder-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0255.Verify%20Preorder%20Sequence%20in%20Binary%20Search%20Tree/images/preorder-tree.jpg" /></p>
 
 <pre>
 <strong>输入: </strong>preorder = [5,2,1,3,6]
diff --git a/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README_EN.md b/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README_EN.md
index cc45ab32ceed4..ca37c464df8ae 100644
--- a/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README_EN.md	
+++ b/solution/0200-0299/0255.Verify Preorder Sequence in Binary Search Tree/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0255.Verify%20Preorder%20Sequence%20in%20Binary%20Search%20Tree/images/preorder-tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0255.Verify%20Preorder%20Sequence%20in%20Binary%20Search%20Tree/images/preorder-tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> preorder = [5,2,1,3,6]
 <strong>Output:</strong> true
diff --git a/solution/0200-0299/0257.Binary Tree Paths/README.md b/solution/0200-0299/0257.Binary Tree Paths/README.md
index 10298129a60fd..3ff5bc0ce0596 100644
--- a/solution/0200-0299/0257.Binary Tree Paths/README.md	
+++ b/solution/0200-0299/0257.Binary Tree Paths/README.md	
@@ -12,7 +12,7 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0257.Binary%20Tree%20Paths/images/paths-tree.jpg" style="width: 207px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0257.Binary%20Tree%20Paths/images/paths-tree.jpg" style="width: 207px; height: 293px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,5]
 <strong>输出：</strong>["1-&gt;2-&gt;5","1-&gt;3"]
diff --git a/solution/0200-0299/0257.Binary Tree Paths/README_EN.md b/solution/0200-0299/0257.Binary Tree Paths/README_EN.md
index c737cc8c0ccaa..df07e81aab952 100644
--- a/solution/0200-0299/0257.Binary Tree Paths/README_EN.md	
+++ b/solution/0200-0299/0257.Binary Tree Paths/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0257.Binary%20Tree%20Paths/images/paths-tree.jpg" style="width: 207px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0257.Binary%20Tree%20Paths/images/paths-tree.jpg" style="width: 207px; height: 293px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,5]
 <strong>Output:</strong> [&quot;1-&gt;2-&gt;5&quot;,&quot;1-&gt;3&quot;]
diff --git a/solution/0200-0299/0261.Graph Valid Tree/README.md b/solution/0200-0299/0261.Graph Valid Tree/README.md
index c421d73294467..f602c8efda42d 100644
--- a/solution/0200-0299/0261.Graph Valid Tree/README.md	
+++ b/solution/0200-0299/0261.Graph Valid Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree1-graph.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree1-graph.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> <code>n = 5</code>, edges<code> = [[0,1],[0,2],[0,3],[1,4]]</code>
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree2-graph.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree2-graph.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> <code>n = 5, </code>edges<code> = [[0,1],[1,2],[2,3],[1,3],[1,4]]</code>
diff --git a/solution/0200-0299/0261.Graph Valid Tree/README_EN.md b/solution/0200-0299/0261.Graph Valid Tree/README_EN.md
index 26f6115ca4809..42c230888584e 100644
--- a/solution/0200-0299/0261.Graph Valid Tree/README_EN.md	
+++ b/solution/0200-0299/0261.Graph Valid Tree/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree1-graph.jpg" style="width: 222px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree1-graph.jpg" style="width: 222px; height: 302px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1],[0,2],[0,3],[1,4]]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree2-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0261.Graph%20Valid%20Tree/images/tree2-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1],[1,2],[2,3],[1,3],[1,4]]
 <strong>Output:</strong> false
diff --git a/solution/0200-0299/0270.Closest Binary Search Tree Value/README_EN.md b/solution/0200-0299/0270.Closest Binary Search Tree Value/README_EN.md
index ae4e85387040a..05f57f2c6f0cf 100644
--- a/solution/0200-0299/0270.Closest Binary Search Tree Value/README_EN.md	
+++ b/solution/0200-0299/0270.Closest Binary Search Tree Value/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0270.Closest%20Binary%20Search%20Tree%20Value/images/closest1-1-tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0270.Closest%20Binary%20Search%20Tree%20Value/images/closest1-1-tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,5,1,3], target = 3.714286
 <strong>Output:</strong> 4
diff --git a/solution/0200-0299/0272.Closest Binary Search Tree Value II/README.md b/solution/0200-0299/0272.Closest Binary Search Tree Value II/README.md
index 0caa3873ecce8..bbba4145834a7 100644
--- a/solution/0200-0299/0272.Closest Binary Search Tree Value II/README.md	
+++ b/solution/0200-0299/0272.Closest Binary Search Tree Value II/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0272.Closest%20Binary%20Search%20Tree%20Value%20II/images/closest1-1-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0272.Closest%20Binary%20Search%20Tree%20Value%20II/images/closest1-1-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> root = [4,2,5,1,3]，目标值 = 3.714286，且 <em>k</em> = 2
diff --git a/solution/0200-0299/0272.Closest Binary Search Tree Value II/README_EN.md b/solution/0200-0299/0272.Closest Binary Search Tree Value II/README_EN.md
index 685720b8c5dd7..4c19ac344fe60 100644
--- a/solution/0200-0299/0272.Closest Binary Search Tree Value II/README_EN.md	
+++ b/solution/0200-0299/0272.Closest Binary Search Tree Value II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0272.Closest%20Binary%20Search%20Tree%20Value%20II/images/closest1-1-tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0272.Closest%20Binary%20Search%20Tree%20Value%20II/images/closest1-1-tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,5,1,3], target = 3.714286, k = 2
 <strong>Output:</strong> [4,3]
diff --git a/solution/0200-0299/0276.Paint Fence/README.md b/solution/0200-0299/0276.Paint Fence/README.md
index eba64c9e8f8fa..1b0b59a419759 100644
--- a/solution/0200-0299/0276.Paint Fence/README.md	
+++ b/solution/0200-0299/0276.Paint Fence/README.md	
@@ -18,7 +18,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0276.Paint%20Fence/images/paintfenceex1.png" style="width: 507px; height: 313px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0276.Paint%20Fence/images/paintfenceex1.png" style="width: 507px; height: 313px;" />
 <pre>
 <strong>输入：</strong>n = 3, k = 2
 <strong>输出：</strong>6
diff --git a/solution/0200-0299/0276.Paint Fence/README_EN.md b/solution/0200-0299/0276.Paint Fence/README_EN.md
index 10ca1e7611310..a1304759c8502 100644
--- a/solution/0200-0299/0276.Paint Fence/README_EN.md	
+++ b/solution/0200-0299/0276.Paint Fence/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0276.Paint%20Fence/images/paintfenceex1.png" style="width: 507px; height: 313px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0276.Paint%20Fence/images/paintfenceex1.png" style="width: 507px; height: 313px;" />
 <pre>
 <strong>Input:</strong> n = 3, k = 2
 <strong>Output:</strong> 6
diff --git a/solution/0200-0299/0277.Find the Celebrity/README.md b/solution/0200-0299/0277.Find the Celebrity/README.md
index 4289f479337dd..d7a90bb9b27a2 100644
--- a/solution/0200-0299/0277.Find the Celebrity/README.md	
+++ b/solution/0200-0299/0277.Find the Celebrity/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/277_example_1_bold.png" style="height: 181px; width: 186px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/277_example_1_bold.png" style="height: 181px; width: 186px;" /></p>
 
 <pre>
 <strong>输入: </strong>graph = [
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/277_example_2.png" style="height: 192px; width: 193px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/277_example_2.png" style="height: 192px; width: 193px;" /></p>
 
 <pre>
 <strong>输入: </strong>graph = [
diff --git a/solution/0200-0299/0277.Find the Celebrity/README_EN.md b/solution/0200-0299/0277.Find the Celebrity/README_EN.md
index a843021e0a4bb..641bcd921bd7d 100644
--- a/solution/0200-0299/0277.Find the Celebrity/README_EN.md	
+++ b/solution/0200-0299/0277.Find the Celebrity/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/g1.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/g1.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,1,0],[0,1,0],[1,1,1]]
 <strong>Output:</strong> 1
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/g2.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0277.Find%20the%20Celebrity/images/g2.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,0,1],[1,1,0],[0,1,1]]
 <strong>Output:</strong> -1
diff --git a/solution/0200-0299/0285.Inorder Successor in BST/README.md b/solution/0200-0299/0285.Inorder Successor in BST/README.md
index 73e75b8bb707a..bcf3bebe53c3d 100644
--- a/solution/0200-0299/0285.Inorder Successor in BST/README.md	
+++ b/solution/0200-0299/0285.Inorder Successor in BST/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,1,3], p = 1
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,null,1], p = 6
diff --git a/solution/0200-0299/0285.Inorder Successor in BST/README_EN.md b/solution/0200-0299/0285.Inorder Successor in BST/README_EN.md
index 434daf08d6085..fb9c0cff9ae82 100644
--- a/solution/0200-0299/0285.Inorder Successor in BST/README_EN.md	
+++ b/solution/0200-0299/0285.Inorder Successor in BST/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_1.png" style="width: 122px; height: 117px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_1.png" style="width: 122px; height: 117px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3], p = 1
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_2.png" style="width: 246px; height: 229px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0285.Inorder%20Successor%20in%20BST/images/285_example_2.png" style="width: 246px; height: 229px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,null,1], p = 6
 <strong>Output:</strong> null
diff --git a/solution/0200-0299/0286.Walls and Gates/README.md b/solution/0200-0299/0286.Walls and Gates/README.md
index 8dc89d85b365c..61dc953f64486 100644
--- a/solution/0200-0299/0286.Walls and Gates/README.md	
+++ b/solution/0200-0299/0286.Walls and Gates/README.md	
@@ -19,7 +19,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0286.Walls%20and%20Gates/images/grid.jpg" style="width: 500px; height: 223px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0286.Walls%20and%20Gates/images/grid.jpg" style="width: 500px; height: 223px;" />
 <pre>
 <strong>输入：</strong>rooms = [[2147483647,-1,0,2147483647],[2147483647,2147483647,2147483647,-1],[2147483647,-1,2147483647,-1],[0,-1,2147483647,2147483647]]
 <strong>输出：</strong>[[3,-1,0,1],[2,2,1,-1],[1,-1,2,-1],[0,-1,3,4]]
diff --git a/solution/0200-0299/0286.Walls and Gates/README_EN.md b/solution/0200-0299/0286.Walls and Gates/README_EN.md
index 20a88051c7ce5..5bcf4f54ae92d 100644
--- a/solution/0200-0299/0286.Walls and Gates/README_EN.md	
+++ b/solution/0200-0299/0286.Walls and Gates/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0286.Walls%20and%20Gates/images/grid.jpg" style="width: 500px; height: 223px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0286.Walls%20and%20Gates/images/grid.jpg" style="width: 500px; height: 223px;" />
 <pre>
 <strong>Input:</strong> rooms = [[2147483647,-1,0,2147483647],[2147483647,2147483647,2147483647,-1],[2147483647,-1,2147483647,-1],[0,-1,2147483647,2147483647]]
 <strong>Output:</strong> [[3,-1,0,1],[2,2,1,-1],[1,-1,2,-1],[0,-1,3,4]]
diff --git a/solution/0200-0299/0289.Game of Life/README.md b/solution/0200-0299/0289.Game of Life/README.md
index 680b606505d48..eb284f8634f55 100644
--- a/solution/0200-0299/0289.Game of Life/README.md	
+++ b/solution/0200-0299/0289.Game of Life/README.md	
@@ -22,14 +22,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid1.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid1.jpg" />
 <pre>
 <strong>输入：</strong>board = [[0,1,0],[0,0,1],[1,1,1],[0,0,0]]
 <strong>输出：</strong>[[0,0,0],[1,0,1],[0,1,1],[0,1,0]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid2.jpg" />
 <pre>
 <strong>输入：</strong>board = [[1,1],[1,0]]
 <strong>输出：</strong>[[1,1],[1,1]]
diff --git a/solution/0200-0299/0289.Game of Life/README_EN.md b/solution/0200-0299/0289.Game of Life/README_EN.md
index d88195da9092f..9540225f193f7 100644
--- a/solution/0200-0299/0289.Game of Life/README_EN.md	
+++ b/solution/0200-0299/0289.Game of Life/README_EN.md	
@@ -19,14 +19,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid1.jpg" style="width: 562px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid1.jpg" style="width: 562px; height: 322px;" />
 <pre>
 <strong>Input:</strong> board = [[0,1,0],[0,0,1],[1,1,1],[0,0,0]]
 <strong>Output:</strong> [[0,0,0],[1,0,1],[0,1,1],[0,1,0]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid2.jpg" style="width: 402px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0289.Game%20of%20Life/images/grid2.jpg" style="width: 402px; height: 162px;" />
 <pre>
 <strong>Input:</strong> board = [[1,1],[1,0]]
 <strong>Output:</strong> [[1,1],[1,1]]
diff --git a/solution/0200-0299/0296.Best Meeting Point/README.md b/solution/0200-0299/0296.Best Meeting Point/README.md
index 8000b3ad57a46..a6040dd0da60c 100644
--- a/solution/0200-0299/0296.Best Meeting Point/README.md	
+++ b/solution/0200-0299/0296.Best Meeting Point/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0296.Best%20Meeting%20Point/images/meetingpoint-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0296.Best%20Meeting%20Point/images/meetingpoint-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> grid = [[1,0,0,0,1],[0,0,0,0,0],[0,0,1,0,0]]
diff --git a/solution/0200-0299/0296.Best Meeting Point/README_EN.md b/solution/0200-0299/0296.Best Meeting Point/README_EN.md
index 8b48aa2c6fee2..ac21973355188 100644
--- a/solution/0200-0299/0296.Best Meeting Point/README_EN.md	
+++ b/solution/0200-0299/0296.Best Meeting Point/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0296.Best%20Meeting%20Point/images/meetingpoint-grid.jpg" style="width: 413px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0296.Best%20Meeting%20Point/images/meetingpoint-grid.jpg" style="width: 413px; height: 253px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0,1],[0,0,0,0,0],[0,0,1,0,0]]
 <strong>Output:</strong> 6
diff --git a/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README.md b/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README.md
index eac580d61a709..cbf534376e5e3 100644
--- a/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README.md	
+++ b/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0297.Serialize%20and%20Deserialize%20Binary%20Tree/images/serdeser.jpg" style="width: 442px; height: 324px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0297.Serialize%20and%20Deserialize%20Binary%20Tree/images/serdeser.jpg" style="width: 442px; height: 324px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,null,4,5]
 <strong>输出：</strong>[1,2,3,null,null,4,5]
diff --git a/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README_EN.md b/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README_EN.md
index a239ad4013ba1..583d80a5795cc 100644
--- a/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README_EN.md	
+++ b/solution/0200-0299/0297.Serialize and Deserialize Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0297.Serialize%20and%20Deserialize%20Binary%20Tree/images/serdeser.jpg" style="width: 442px; height: 324px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0297.Serialize%20and%20Deserialize%20Binary%20Tree/images/serdeser.jpg" style="width: 442px; height: 324px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,null,4,5]
 <strong>Output:</strong> [1,2,3,null,null,4,5]
diff --git a/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README.md b/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README.md
index c8bf65481e200..1acda244e1f0c 100644
--- a/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README.md	
+++ b/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README.md	
@@ -12,7 +12,7 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-1-tree.jpg" style="width: 322px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-1-tree.jpg" style="width: 322px; height: 421px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,null,null,5]
 <strong>输出：</strong>3
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-2-tree.jpg" style="width: 262px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-2-tree.jpg" style="width: 262px; height: 421px;" />
 <pre>
 <strong>输入：</strong>root = [2,null,3,2,null,1]
 <strong>输出：</strong>2
diff --git a/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README_EN.md b/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README_EN.md
index 9995803ed7cc9..3895cc7dc6d5b 100644
--- a/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README_EN.md	
+++ b/solution/0200-0299/0298.Binary Tree Longest Consecutive Sequence/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-1-tree.jpg" style="width: 322px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-1-tree.jpg" style="width: 322px; height: 421px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,null,null,5]
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-2-tree.jpg" style="width: 262px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0200-0299/0298.Binary%20Tree%20Longest%20Consecutive%20Sequence/images/consec1-2-tree.jpg" style="width: 262px; height: 421px;" />
 <pre>
 <strong>Input:</strong> root = [2,null,3,2,null,1]
 <strong>Output:</strong> 2
diff --git a/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README.md b/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README.md
index 2c90a326638d2..29c9a2f62ebd5 100644
--- a/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README.md	
+++ b/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0302.Smallest%20Rectangle%20Enclosing%20Black%20Pixels/images/pixel-grid.jpg" style="width: 333px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0302.Smallest%20Rectangle%20Enclosing%20Black%20Pixels/images/pixel-grid.jpg" style="width: 333px; height: 253px;" />
 <pre>
 <strong>输入：</strong>image = [["0","0","1","0"],["0","1","1","0"],["0","1","0","0"]], x = 0, y = 2
 <strong>输出：</strong>6
diff --git a/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README_EN.md b/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README_EN.md
index cd528e5de551b..009fccc7c97b0 100644
--- a/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README_EN.md	
+++ b/solution/0300-0399/0302.Smallest Rectangle Enclosing Black Pixels/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0302.Smallest%20Rectangle%20Enclosing%20Black%20Pixels/images/pixel-grid.jpg" style="width: 333px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0302.Smallest%20Rectangle%20Enclosing%20Black%20Pixels/images/pixel-grid.jpg" style="width: 333px; height: 253px;" />
 <pre>
 <strong>Input:</strong> image = [[&quot;0&quot;,&quot;0&quot;,&quot;1&quot;,&quot;0&quot;],[&quot;0&quot;,&quot;1&quot;,&quot;1&quot;,&quot;0&quot;],[&quot;0&quot;,&quot;1&quot;,&quot;0&quot;,&quot;0&quot;]], x = 0, y = 2
 <strong>Output:</strong> 6
diff --git a/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README.md b/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README.md
index bbad9422927d4..f994e1c5ce252 100644
--- a/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README.md	
+++ b/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/images/1626332422-wUpUHT-image.png" style="width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/images/1626332422-wUpUHT-image.png" style="width: 200px;" /></p>
 
 <pre>
 <strong>输入:</strong> 
diff --git a/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README_EN.md b/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README_EN.md
index 7c8b5f7c5379b..51fd1bb94075a 100644
--- a/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README_EN.md	
+++ b/solution/0300-0399/0304.Range Sum Query 2D - Immutable/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/images/sum-grid.jpg" style="width: 415px; height: 415px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0304.Range%20Sum%20Query%202D%20-%20Immutable/images/sum-grid.jpg" style="width: 415px; height: 415px;" />
 <pre>
 <strong>Input</strong>
 [&quot;NumMatrix&quot;, &quot;sumRegion&quot;, &quot;sumRegion&quot;, &quot;sumRegion&quot;]
diff --git a/solution/0300-0399/0305.Number of Islands II/README.md b/solution/0300-0399/0305.Number of Islands II/README.md
index b948a9c98163b..d67ab3f61a072 100644
--- a/solution/0300-0399/0305.Number of Islands II/README.md	
+++ b/solution/0300-0399/0305.Number of Islands II/README.md	
@@ -16,7 +16,7 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0305.Number%20of%20Islands%20II/images/tmp-grid.jpg" style="width: 500px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0305.Number%20of%20Islands%20II/images/tmp-grid.jpg" style="width: 500px; height: 294px;" />
 <pre>
 <strong>输入：</strong>m = 3, n = 3, positions = [[0,0],[0,1],[1,2],[2,1]]
 <strong>输出：</strong>[1,1,2,3]
diff --git a/solution/0300-0399/0305.Number of Islands II/README_EN.md b/solution/0300-0399/0305.Number of Islands II/README_EN.md
index 2d1a44a5a4130..86c89f3c05c52 100644
--- a/solution/0300-0399/0305.Number of Islands II/README_EN.md	
+++ b/solution/0300-0399/0305.Number of Islands II/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0305.Number%20of%20Islands%20II/images/tmp-grid.jpg" style="width: 500px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0305.Number%20of%20Islands%20II/images/tmp-grid.jpg" style="width: 500px; height: 294px;" />
 <pre>
 <strong>Input:</strong> m = 3, n = 3, positions = [[0,0],[0,1],[1,2],[2,1]]
 <strong>Output:</strong> [1,1,2,3]
diff --git a/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README.md b/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README.md
index 9a0d532777657..70742a2e0b685 100644
--- a/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README.md	
+++ b/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README.md	
@@ -24,7 +24,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0308.Range%20Sum%20Query%202D%20-%20Mutable/images/summut-grid.jpg" style="height: 222px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0308.Range%20Sum%20Query%202D%20-%20Mutable/images/summut-grid.jpg" style="height: 222px; width: 500px;" />
 <pre>
 <strong>输入</strong>
 ["NumMatrix", "sumRegion", "update", "sumRegion"]
diff --git a/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README_EN.md b/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README_EN.md
index 891236c0788f9..e7a6593e4c3aa 100644
--- a/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README_EN.md	
+++ b/solution/0300-0399/0308.Range Sum Query 2D - Mutable/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0308.Range%20Sum%20Query%202D%20-%20Mutable/images/summut-grid.jpg" style="width: 500px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0308.Range%20Sum%20Query%202D%20-%20Mutable/images/summut-grid.jpg" style="width: 500px; height: 222px;" />
 <pre>
 <strong>Input</strong>
 [&quot;NumMatrix&quot;, &quot;sumRegion&quot;, &quot;update&quot;, &quot;sumRegion&quot;]
diff --git a/solution/0300-0399/0310.Minimum Height Trees/README.md b/solution/0300-0399/0310.Minimum Height Trees/README.md
index 41d8590d753da..77a913bba9faf 100644
--- a/solution/0300-0399/0310.Minimum Height Trees/README.md	
+++ b/solution/0300-0399/0310.Minimum Height Trees/README.md	
@@ -18,14 +18,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e1.jpg" style="height: 213px; width: 800px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e1.jpg" style="height: 213px; width: 800px;" />
 <pre>
 <strong>输入：</strong>n = 4, edges = [[1,0],[1,2],[1,3]]
 <strong>输出：</strong>[1]
 <strong>解释：</strong>如图所示，当根是标签为 1 的节点时，树的高度是 1 ，这是唯一的最小高度树。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e2.jpg" style="height: 321px; width: 800px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e2.jpg" style="height: 321px; width: 800px;" />
 <pre>
 <strong>输入：</strong>n = 6, edges = [[3,0],[3,1],[3,2],[3,4],[5,4]]
 <strong>输出：</strong>[3,4]
diff --git a/solution/0300-0399/0310.Minimum Height Trees/README_EN.md b/solution/0300-0399/0310.Minimum Height Trees/README_EN.md
index f6987a9187679..cd9ac29f60f84 100644
--- a/solution/0300-0399/0310.Minimum Height Trees/README_EN.md	
+++ b/solution/0300-0399/0310.Minimum Height Trees/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e1.jpg" style="width: 800px; height: 213px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e1.jpg" style="width: 800px; height: 213px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[1,0],[1,2],[1,3]]
 <strong>Output:</strong> [1]
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e2.jpg" style="width: 800px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0310.Minimum%20Height%20Trees/images/e2.jpg" style="width: 800px; height: 321px;" />
 <pre>
 <strong>Input:</strong> n = 6, edges = [[3,0],[3,1],[3,2],[3,4],[5,4]]
 <strong>Output:</strong> [3,4]
diff --git a/solution/0300-0399/0311.Sparse Matrix Multiplication/README.md b/solution/0300-0399/0311.Sparse Matrix Multiplication/README.md
index 6da7628a1750f..2c8b0841fcd9d 100644
--- a/solution/0300-0399/0311.Sparse Matrix Multiplication/README.md	
+++ b/solution/0300-0399/0311.Sparse Matrix Multiplication/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0311.Sparse%20Matrix%20Multiplication/images/mult-grid.jpg" style="height: 142px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0311.Sparse%20Matrix%20Multiplication/images/mult-grid.jpg" style="height: 142px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat1 = [[1,0,0],[-1,0,3]], mat2 = [[7,0,0],[0,0,0],[0,0,1]]
diff --git a/solution/0300-0399/0311.Sparse Matrix Multiplication/README_EN.md b/solution/0300-0399/0311.Sparse Matrix Multiplication/README_EN.md
index 9ad08147da740..7c9ed80bbee5f 100644
--- a/solution/0300-0399/0311.Sparse Matrix Multiplication/README_EN.md	
+++ b/solution/0300-0399/0311.Sparse Matrix Multiplication/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0311.Sparse%20Matrix%20Multiplication/images/mult-grid.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0311.Sparse%20Matrix%20Multiplication/images/mult-grid.jpg" style="width: 500px; height: 142px;" />
 <pre>
 <strong>Input:</strong> mat1 = [[1,0,0],[-1,0,3]], mat2 = [[7,0,0],[0,0,0],[0,0,1]]
 <strong>Output:</strong> [[7,0,0],[-7,0,3]]
diff --git a/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README.md b/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README.md
index 1d1f949b3e0be..7c29966b99638 100644
--- a/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README.md	
+++ b/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README.md	
@@ -13,21 +13,21 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree1.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree1.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>[[9],[3,15],[20],[7]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2-1.jpg" style="width: 462px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2-1.jpg" style="width: 462px; height: 222px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,8,4,0,1,7]
 <strong>输出：</strong>[[4],[9],[3,0,1],[8],[7]]
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2.jpg" style="width: 462px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2.jpg" style="width: 462px; height: 302px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,8,4,0,1,7,null,null,null,2,5]
 <strong>输出：</strong>[[4],[9,5],[3,0,1],[8,2],[7]]
diff --git a/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README_EN.md b/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README_EN.md
index 1dc154c946e2d..376b845208ec4 100644
--- a/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README_EN.md	
+++ b/solution/0300-0399/0314.Binary Tree Vertical Order Traversal/README_EN.md	
@@ -10,21 +10,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree1.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree1.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [[9],[3,15],[20],[7]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2-1.jpg" style="width: 462px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2-1.jpg" style="width: 462px; height: 222px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,8,4,0,1,7]
 <strong>Output:</strong> [[4],[9],[3,0,1],[8],[7]]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2.jpg" style="width: 462px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0314.Binary%20Tree%20Vertical%20Order%20Traversal/images/vtree2.jpg" style="width: 462px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,8,4,0,1,7,null,null,null,2,5]
 <strong>Output:</strong> [[4],[9,5],[3,0,1],[8,2],[7]]
diff --git a/solution/0300-0399/0317.Shortest Distance from All Buildings/README.md b/solution/0300-0399/0317.Shortest Distance from All Buildings/README.md
index 8369439454518..67cf13df80d4e 100644
--- a/solution/0300-0399/0317.Shortest Distance from All Buildings/README.md	
+++ b/solution/0300-0399/0317.Shortest Distance from All Buildings/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例&nbsp; 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0317.Shortest%20Distance%20from%20All%20Buildings/images/buildings-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0317.Shortest%20Distance%20from%20All%20Buildings/images/buildings-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,0,2,0,1],[0,0,0,0,0],[0,0,1,0,0]]
diff --git a/solution/0300-0399/0317.Shortest Distance from All Buildings/README_EN.md b/solution/0300-0399/0317.Shortest Distance from All Buildings/README_EN.md
index 49d5b2df984d2..f3a2abae1b986 100644
--- a/solution/0300-0399/0317.Shortest Distance from All Buildings/README_EN.md	
+++ b/solution/0300-0399/0317.Shortest Distance from All Buildings/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0317.Shortest%20Distance%20from%20All%20Buildings/images/buildings-grid.jpg" style="width: 413px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0317.Shortest%20Distance%20from%20All%20Buildings/images/buildings-grid.jpg" style="width: 413px; height: 253px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,2,0,1],[0,0,0,0,0],[0,0,1,0,0]]
 <strong>Output:</strong> 7
diff --git a/solution/0300-0399/0319.Bulb Switcher/README.md b/solution/0300-0399/0319.Bulb Switcher/README.md
index 5e3e73d343642..0033359fc94ec 100644
--- a/solution/0300-0399/0319.Bulb Switcher/README.md	
+++ b/solution/0300-0399/0319.Bulb Switcher/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0319.Bulb%20Switcher/images/bulb.jpg" style="width: 421px; height: 321px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0319.Bulb%20Switcher/images/bulb.jpg" style="width: 421px; height: 321px;" /></p>
 
 <pre>
 <strong>输入：</strong>n =<strong> </strong>3
diff --git a/solution/0300-0399/0319.Bulb Switcher/README_EN.md b/solution/0300-0399/0319.Bulb Switcher/README_EN.md
index ce81665ec3543..101cefc42c387 100644
--- a/solution/0300-0399/0319.Bulb Switcher/README_EN.md	
+++ b/solution/0300-0399/0319.Bulb Switcher/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0319.Bulb%20Switcher/images/bulb.jpg" style="width: 421px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0319.Bulb%20Switcher/images/bulb.jpg" style="width: 421px; height: 321px;" />
 <pre>
 <strong>Input:</strong> n = 3
 <strong>Output:</strong> 1
diff --git a/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README.md b/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README.md
index 363ffdf754360..7ddd466c4edca 100644
--- a/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README.md	
+++ b/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn1-graph.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn1-graph.jpg" /></p>
 
 <pre>
 <strong>输入: </strong><code>n = 5</code>, <code>edges = [[0, 1], [1, 2], [3, 4]]</code>
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn2-graph.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn2-graph.jpg" /></p>
 
 <pre>
 <strong>输入: </strong><code>n = 5,</code> <code>edges = [[0,1], [1,2], [2,3], [3,4]]</code>
diff --git a/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README_EN.md b/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README_EN.md
index 2bbb1649f2ca9..084ba6d39be20 100644
--- a/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README_EN.md	
+++ b/solution/0300-0399/0323.Number of Connected Components in an Undirected Graph/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn1-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn1-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1],[1,2],[3,4]]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn2-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0323.Number%20of%20Connected%20Components%20in%20an%20Undirected%20Graph/images/conn2-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1],[1,2],[2,3],[3,4]]
 <strong>Output:</strong> 1
diff --git a/solution/0300-0399/0328.Odd Even Linked List/README.md b/solution/0300-0399/0328.Odd Even Linked List/README.md
index 6a801e96f496f..912ae2f95e3e9 100644
--- a/solution/0300-0399/0328.Odd Even Linked List/README.md	
+++ b/solution/0300-0399/0328.Odd Even Linked List/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven-linked-list.jpg" style="height: 123px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven-linked-list.jpg" style="height: 123px; width: 300px;" /></p>
 
 <pre>
 <strong>输入: </strong>head = [1,2,3,4,5]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven2-linked-list.jpg" style="height: 142px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven2-linked-list.jpg" style="height: 142px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> head = [2,1,3,5,6,4,7]
diff --git a/solution/0300-0399/0328.Odd Even Linked List/README_EN.md b/solution/0300-0399/0328.Odd Even Linked List/README_EN.md
index 71edb0f991f3d..e078ce8b118c0 100644
--- a/solution/0300-0399/0328.Odd Even Linked List/README_EN.md	
+++ b/solution/0300-0399/0328.Odd Even Linked List/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven-linked-list.jpg" style="width: 300px; height: 123px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven-linked-list.jpg" style="width: 300px; height: 123px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5]
 <strong>Output:</strong> [1,3,5,2,4]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven2-linked-list.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0328.Odd%20Even%20Linked%20List/images/oddeven2-linked-list.jpg" style="width: 500px; height: 142px;" />
 <pre>
 <strong>Input:</strong> head = [2,1,3,5,6,4,7]
 <strong>Output:</strong> [2,3,6,7,1,5,4]
diff --git a/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README.md b/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README.md
index aa979b01835b4..c3406a190f557 100644
--- a/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README.md	
+++ b/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README.md	
@@ -13,14 +13,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/grid1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/grid1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[9,9,4],[6,6,8],[2,1,1]]
 <strong>输出：</strong>4 
 <strong>解释：</strong>最长递增路径为 <code>[1, 2, 6, 9]</code>。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/tmp-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/tmp-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>matrix = [[3,4,5],[3,2,6],[2,2,1]]
 <strong>输出：</strong>4 
diff --git a/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README_EN.md b/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README_EN.md
index 1c8c1bd2c7efd..d870087ad16b2 100644
--- a/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README_EN.md	
+++ b/solution/0300-0399/0329.Longest Increasing Path in a Matrix/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/grid1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/grid1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[9,9,4],[6,6,8],[2,1,1]]
 <strong>Output:</strong> 4
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/tmp-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0329.Longest%20Increasing%20Path%20in%20a%20Matrix/images/tmp-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> matrix = [[3,4,5],[3,2,6],[2,2,1]]
 <strong>Output:</strong> 4
diff --git a/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README.md b/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README.md
index 535090c9873c6..08c48ad3a3ecd 100644
--- a/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README.md	
+++ b/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README.md	
@@ -8,7 +8,7 @@
 
 <p>序列化二叉树的一种方法是使用 <strong>前序遍历 </strong>。当我们遇到一个非空节点时，我们可以记录下这个节点的值。如果它是一个空节点，我们可以使用一个标记值记录，例如 <code>#</code>。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0331.Verify%20Preorder%20Serialization%20of%20a%20Binary%20Tree/images/pre-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0331.Verify%20Preorder%20Serialization%20of%20a%20Binary%20Tree/images/pre-tree.jpg" /></p>
 
 <p>例如，上面的二叉树可以被序列化为字符串 <code>"9,3,4,#,#,1,#,#,2,#,6,#,#"</code>，其中 <code>#</code> 代表一个空节点。</p>
 
diff --git a/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README_EN.md b/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README_EN.md
index 56734be58692d..494aba69b6de7 100644
--- a/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README_EN.md	
+++ b/solution/0300-0399/0331.Verify Preorder Serialization of a Binary Tree/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>One way to serialize a binary tree is to use <strong>preorder traversal</strong>. When we encounter a non-null node, we record the node&#39;s value. If it is a null node, we record using a sentinel value such as <code>&#39;#&#39;</code>.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0331.Verify%20Preorder%20Serialization%20of%20a%20Binary%20Tree/images/pre-tree.jpg" style="width: 362px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0331.Verify%20Preorder%20Serialization%20of%20a%20Binary%20Tree/images/pre-tree.jpg" style="width: 362px; height: 293px;" />
 <p>For example, the above binary tree can be serialized to the string <code>&quot;9,3,4,#,#,1,#,#,2,#,6,#,#&quot;</code>, where <code>&#39;#&#39;</code> represents a null node.</p>
 
 <p>Given a string of comma-separated values <code>preorder</code>, return <code>true</code> if it is a correct preorder traversal serialization of a binary tree.</p>
diff --git a/solution/0300-0399/0332.Reconstruct Itinerary/README.md b/solution/0300-0399/0332.Reconstruct Itinerary/README.md
index 7eaa70203a422..bd47fa1c4dca8 100644
--- a/solution/0300-0399/0332.Reconstruct Itinerary/README.md	
+++ b/solution/0300-0399/0332.Reconstruct Itinerary/README.md	
@@ -19,14 +19,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary1-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary1-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>输入：</strong>tickets = [["MUC","LHR"],["JFK","MUC"],["SFO","SJC"],["LHR","SFO"]]
 <strong>输出：</strong>["JFK","MUC","LHR","SFO","SJC"]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary2-graph.jpg" style="width: 222px; height: 230px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary2-graph.jpg" style="width: 222px; height: 230px;" />
 <pre>
 <strong>输入：</strong>tickets = [["JFK","SFO"],["JFK","ATL"],["SFO","ATL"],["ATL","JFK"],["ATL","SFO"]]
 <strong>输出：</strong>["JFK","ATL","JFK","SFO","ATL","SFO"]
diff --git a/solution/0300-0399/0332.Reconstruct Itinerary/README_EN.md b/solution/0300-0399/0332.Reconstruct Itinerary/README_EN.md
index a35a415bf216a..04ba08ceabb6b 100644
--- a/solution/0300-0399/0332.Reconstruct Itinerary/README_EN.md	
+++ b/solution/0300-0399/0332.Reconstruct Itinerary/README_EN.md	
@@ -16,14 +16,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary1-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary1-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> tickets = [[&quot;MUC&quot;,&quot;LHR&quot;],[&quot;JFK&quot;,&quot;MUC&quot;],[&quot;SFO&quot;,&quot;SJC&quot;],[&quot;LHR&quot;,&quot;SFO&quot;]]
 <strong>Output:</strong> [&quot;JFK&quot;,&quot;MUC&quot;,&quot;LHR&quot;,&quot;SFO&quot;,&quot;SJC&quot;]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary2-graph.jpg" style="width: 222px; height: 230px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0332.Reconstruct%20Itinerary/images/itinerary2-graph.jpg" style="width: 222px; height: 230px;" />
 <pre>
 <strong>Input:</strong> tickets = [[&quot;JFK&quot;,&quot;SFO&quot;],[&quot;JFK&quot;,&quot;ATL&quot;],[&quot;SFO&quot;,&quot;ATL&quot;],[&quot;ATL&quot;,&quot;JFK&quot;],[&quot;ATL&quot;,&quot;SFO&quot;]]
 <strong>Output:</strong> [&quot;JFK&quot;,&quot;ATL&quot;,&quot;JFK&quot;,&quot;SFO&quot;,&quot;ATL&quot;,&quot;SFO&quot;]
diff --git a/solution/0300-0399/0333.Largest BST Subtree/README.md b/solution/0300-0399/0333.Largest BST Subtree/README.md
index 942c3cb7f8481..947cc8ac7c133 100644
--- a/solution/0300-0399/0333.Largest BST Subtree/README.md	
+++ b/solution/0300-0399/0333.Largest BST Subtree/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0333.Largest%20BST%20Subtree/images/tmp.jpg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0333.Largest%20BST%20Subtree/images/tmp.jpg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [10,5,15,1,8,null,7]
diff --git a/solution/0300-0399/0333.Largest BST Subtree/README_EN.md b/solution/0300-0399/0333.Largest BST Subtree/README_EN.md
index 518e1244bf5bc..6fe4bf0641745 100644
--- a/solution/0300-0399/0333.Largest BST Subtree/README_EN.md	
+++ b/solution/0300-0399/0333.Largest BST Subtree/README_EN.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0333.Largest%20BST%20Subtree/images/tmp.jpg" style="width: 571px; height: 302px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0333.Largest%20BST%20Subtree/images/tmp.jpg" style="width: 571px; height: 302px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [10,5,15,1,8,null,7]
diff --git a/solution/0300-0399/0335.Self Crossing/README.md b/solution/0300-0399/0335.Self Crossing/README.md
index 55490f02d30d7..74a0aafe1e2cd 100644
--- a/solution/0300-0399/0335.Self Crossing/README.md	
+++ b/solution/0300-0399/0335.Self Crossing/README.md	
@@ -15,21 +15,21 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross1-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross1-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>输入：</strong>distance = [2,1,1,2]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross2-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross2-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>输入：</strong>distance = [1,2,3,4]
 <strong>输出：</strong>false
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross3-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross3-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>输入：</strong>distance = [1,1,1,1]
 <strong>输出：</strong>true</pre>
diff --git a/solution/0300-0399/0335.Self Crossing/README_EN.md b/solution/0300-0399/0335.Self Crossing/README_EN.md
index b50e3dc3403d4..19259894925f1 100644
--- a/solution/0300-0399/0335.Self Crossing/README_EN.md	
+++ b/solution/0300-0399/0335.Self Crossing/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross1-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross1-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>Input:</strong> distance = [2,1,1,2]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross2-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross2-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>Input:</strong> distance = [1,2,3,4]
 <strong>Output:</strong> false
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross3-plane.jpg" style="width: 400px; height: 435px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0335.Self%20Crossing/images/selfcross3-plane.jpg" style="width: 400px; height: 435px;" />
 <pre>
 <strong>Input:</strong> distance = [1,1,1,1]
 <strong>Output:</strong> true
diff --git a/solution/0300-0399/0337.House Robber III/README.md b/solution/0300-0399/0337.House Robber III/README.md
index 64f8d47df1904..8bc77609010af 100644
--- a/solution/0300-0399/0337.House Robber III/README.md	
+++ b/solution/0300-0399/0337.House Robber III/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob1-tree.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob1-tree.jpg" /></p>
 
 <pre>
 <strong>输入: </strong>root = [3,2,3,null,3,null,1]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob2-tree.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob2-tree.jpg" /></p>
 
 <pre>
 <strong>输入: </strong>root = [3,4,5,1,3,null,1]
diff --git a/solution/0300-0399/0337.House Robber III/README_EN.md b/solution/0300-0399/0337.House Robber III/README_EN.md
index 8820a93fc66b4..60bf1ffdf8a71 100644
--- a/solution/0300-0399/0337.House Robber III/README_EN.md	
+++ b/solution/0300-0399/0337.House Robber III/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob1-tree.jpg" style="width: 277px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob1-tree.jpg" style="width: 277px; height: 293px;" />
 <pre>
 <strong>Input:</strong> root = [3,2,3,null,3,null,1]
 <strong>Output:</strong> 7
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob2-tree.jpg" style="width: 357px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0337.House%20Robber%20III/images/rob2-tree.jpg" style="width: 357px; height: 293px;" />
 <pre>
 <strong>Input:</strong> root = [3,4,5,1,3,null,1]
 <strong>Output:</strong> 9
diff --git a/solution/0300-0399/0339.Nested List Weight Sum/README.md b/solution/0300-0399/0339.Nested List Weight Sum/README.md
index 14c512e1ad623..8606a809480d0 100644
--- a/solution/0300-0399/0339.Nested List Weight Sum/README.md	
+++ b/solution/0300-0399/0339.Nested List Weight Sum/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex1.png" style="width: 405px; height: 99px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex1.png" style="width: 405px; height: 99px;" /></p>
 
 <pre>
 <strong>输入：</strong>nestedList = [[1,1],2,[1,1]]
@@ -24,7 +24,7 @@
 <strong>解释：</strong>因为列表中有四个深度为 2 的 1 ，和一个深度为 1 的 2。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex2.png" style="width: 315px; height: 106px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex2.png" style="width: 315px; height: 106px;" />
 <pre>
 <strong>输入：</strong>nestedList = [1,[4,[6]]]
 <strong>输出：</strong>27 
diff --git a/solution/0300-0399/0339.Nested List Weight Sum/README_EN.md b/solution/0300-0399/0339.Nested List Weight Sum/README_EN.md
index 35a39953f9fa4..d8da19da10517 100644
--- a/solution/0300-0399/0339.Nested List Weight Sum/README_EN.md	
+++ b/solution/0300-0399/0339.Nested List Weight Sum/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex1.png" style="width: 405px; height: 99px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex1.png" style="width: 405px; height: 99px;" />
 <pre>
 <strong>Input:</strong> nestedList = [[1,1],2,[1,1]]
 <strong>Output:</strong> 10
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex2.png" style="width: 315px; height: 106px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0339.Nested%20List%20Weight%20Sum/images/nestedlistweightsumex2.png" style="width: 315px; height: 106px;" />
 <pre>
 <strong>Input:</strong> nestedList = [1,[4,[6]]]
 <strong>Output:</strong> 27
diff --git a/solution/0300-0399/0351.Android Unlock Patterns/README.md b/solution/0300-0399/0351.Android Unlock Patterns/README.md
index a5b2790f70682..fb7a9f9189413 100644
--- a/solution/0300-0399/0351.Android Unlock Patterns/README.md	
+++ b/solution/0300-0399/0351.Android Unlock Patterns/README.md	
@@ -20,7 +20,7 @@
 
 <p>以下是一些有效和无效解锁模式的示例：</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0351.Android%20Unlock%20Patterns/images/android-unlock.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0351.Android%20Unlock%20Patterns/images/android-unlock.png" /></p>
 
 <ul>
 	<li><strong>无效手势：</strong><code>[4,1,3,6]</code> ，连接点 1 和点&nbsp;3 时经过了未被连接过的&nbsp;2 号点。</li>
diff --git a/solution/0300-0399/0351.Android Unlock Patterns/README_EN.md b/solution/0300-0399/0351.Android Unlock Patterns/README_EN.md
index d27c2ba458804..60e5e92370b16 100644
--- a/solution/0300-0399/0351.Android Unlock Patterns/README_EN.md	
+++ b/solution/0300-0399/0351.Android Unlock Patterns/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>Here are some example valid and invalid unlock patterns:</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0351.Android%20Unlock%20Patterns/images/android-unlock.png" style="width: 418px; height: 128px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0351.Android%20Unlock%20Patterns/images/android-unlock.png" style="width: 418px; height: 128px;" /></p>
 
 <ul>
 	<li>The 1st pattern <code>[4,1,3,6]</code> is invalid because the line connecting dots <code>1</code> and <code>3</code> pass through dot <code>2</code>, but dot <code>2</code> did not previously appear in the sequence.</li>
diff --git a/solution/0300-0399/0353.Design Snake Game/README.md b/solution/0300-0399/0353.Design Snake Game/README.md
index ce375205d85a4..086b767aa14b1 100644
--- a/solution/0300-0399/0353.Design Snake Game/README.md	
+++ b/solution/0300-0399/0353.Design Snake Game/README.md	
@@ -27,7 +27,7 @@
  
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0353.Design%20Snake%20Game/images/snake.jpg" style="width: 800px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0353.Design%20Snake%20Game/images/snake.jpg" style="width: 800px; height: 302px;" />
 <pre>
 <strong>输入：</strong>
 ["SnakeGame", "move", "move", "move", "move", "move", "move"]
diff --git a/solution/0300-0399/0353.Design Snake Game/README_EN.md b/solution/0300-0399/0353.Design Snake Game/README_EN.md
index 4111c0234eafc..7536ce938a5ab 100644
--- a/solution/0300-0399/0353.Design Snake Game/README_EN.md	
+++ b/solution/0300-0399/0353.Design Snake Game/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0353.Design%20Snake%20Game/images/snake.jpg" style="width: 800px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0353.Design%20Snake%20Game/images/snake.jpg" style="width: 800px; height: 302px;" />
 <pre>
 <strong>Input</strong>
 [&quot;SnakeGame&quot;, &quot;move&quot;, &quot;move&quot;, &quot;move&quot;, &quot;move&quot;, &quot;move&quot;, &quot;move&quot;]
diff --git a/solution/0300-0399/0356.Line Reflection/README.md b/solution/0300-0399/0356.Line Reflection/README.md
index c0dfba94f063c..f848785122ec5 100644
--- a/solution/0300-0399/0356.Line Reflection/README.md	
+++ b/solution/0300-0399/0356.Line Reflection/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_1.png" style="width: 389px; height: 340px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_1.png" style="width: 389px; height: 340px;" />
 <pre>
 <strong>输入：</strong>points = [[1,1],[-1,1]]
 <strong>输出：</strong>true
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_2.png" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_2.png" style="width: 300px; height: 294px;" />
 <pre>
 <strong>输入：</strong>points = [[1,1],[-1,-1]]
 <strong>输出：</strong>false
diff --git a/solution/0300-0399/0356.Line Reflection/README_EN.md b/solution/0300-0399/0356.Line Reflection/README_EN.md
index af1b18db570b3..935b14ee9a366 100644
--- a/solution/0300-0399/0356.Line Reflection/README_EN.md	
+++ b/solution/0300-0399/0356.Line Reflection/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_1.png" style="width: 389px; height: 340px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_1.png" style="width: 389px; height: 340px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[-1,1]]
 <strong>Output:</strong> true
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_2.png" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0356.Line%20Reflection/images/356_example_2.png" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[-1,-1]]
 <strong>Output:</strong> false
diff --git a/solution/0300-0399/0361.Bomb Enemy/README.md b/solution/0300-0399/0361.Bomb Enemy/README.md
index 9cf78e6aed5f9..4b265373c7a9f 100644
--- a/solution/0300-0399/0361.Bomb Enemy/README.md	
+++ b/solution/0300-0399/0361.Bomb Enemy/README.md	
@@ -21,14 +21,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb1-grid.jpg" style="width: 600px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb1-grid.jpg" style="width: 600px; height: 187px;" />
 <pre>
 <strong>输入：</strong>grid = [["0","E","0","0"],["E","0","W","E"],["0","E","0","0"]]
 <strong>输出：</strong>3
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb2-grid.jpg" style="width: 500px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb2-grid.jpg" style="width: 500px; height: 194px;" />
 <pre>
 <strong>输入：</strong>grid = [["W","W","W"],["0","0","0"],["E","E","E"]]
 <strong>输出：</strong>1
diff --git a/solution/0300-0399/0361.Bomb Enemy/README_EN.md b/solution/0300-0399/0361.Bomb Enemy/README_EN.md
index f3155574d9544..a84d4e5c5b858 100644
--- a/solution/0300-0399/0361.Bomb Enemy/README_EN.md	
+++ b/solution/0300-0399/0361.Bomb Enemy/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb1-grid.jpg" style="width: 600px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb1-grid.jpg" style="width: 600px; height: 187px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;0&quot;,&quot;E&quot;,&quot;0&quot;,&quot;0&quot;],[&quot;E&quot;,&quot;0&quot;,&quot;W&quot;,&quot;E&quot;],[&quot;0&quot;,&quot;E&quot;,&quot;0&quot;,&quot;0&quot;]]
 <strong>Output:</strong> 3
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb2-grid.jpg" style="width: 500px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0361.Bomb%20Enemy/images/bomb2-grid.jpg" style="width: 500px; height: 194px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;W&quot;,&quot;W&quot;,&quot;W&quot;],[&quot;0&quot;,&quot;0&quot;,&quot;0&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;]]
 <strong>Output:</strong> 1
diff --git a/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README.md b/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README.md
index 802f389cdf519..3a065b71da04f 100644
--- a/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README.md	
+++ b/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0363.Max%20Sum%20of%20Rectangle%20No%20Larger%20Than%20K/images/sum-grid.jpg" style="width: 255px; height: 176px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0363.Max%20Sum%20of%20Rectangle%20No%20Larger%20Than%20K/images/sum-grid.jpg" style="width: 255px; height: 176px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,0,1],[0,-2,3]], k = 2
 <strong>输出：</strong>2
diff --git a/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README_EN.md b/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README_EN.md
index 71e5b43cad290..e6fa46f671241 100644
--- a/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README_EN.md	
+++ b/solution/0300-0399/0363.Max Sum of Rectangle No Larger Than K/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0363.Max%20Sum%20of%20Rectangle%20No%20Larger%20Than%20K/images/sum-grid.jpg" style="width: 255px; height: 176px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0363.Max%20Sum%20of%20Rectangle%20No%20Larger%20Than%20K/images/sum-grid.jpg" style="width: 255px; height: 176px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,0,1],[0,-2,3]], k = 2
 <strong>Output:</strong> 2
diff --git a/solution/0300-0399/0364.Nested List Weight Sum II/README.md b/solution/0300-0399/0364.Nested List Weight Sum II/README.md
index 1de1f1169d177..949341b87358c 100644
--- a/solution/0300-0399/0364.Nested List Weight Sum II/README.md	
+++ b/solution/0300-0399/0364.Nested List Weight Sum II/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex1.png" style="width: 426px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex1.png" style="width: 426px; height: 181px;" />
 <pre>
 <strong>输入：</strong>nestedList = [[1,1],2,[1,1]]
 <strong>输出：</strong>8
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex2.png" style="width: 349px; height: 192px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex2.png" style="width: 349px; height: 192px;" />
 <pre>
 <strong>输入：</strong>nestedList = [1,[4,[6]]]
 <strong>输出：</strong>17
diff --git a/solution/0300-0399/0364.Nested List Weight Sum II/README_EN.md b/solution/0300-0399/0364.Nested List Weight Sum II/README_EN.md
index 603be64f8c128..69a3392a1c2db 100644
--- a/solution/0300-0399/0364.Nested List Weight Sum II/README_EN.md	
+++ b/solution/0300-0399/0364.Nested List Weight Sum II/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex1.png" style="width: 426px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex1.png" style="width: 426px; height: 181px;" />
 <pre>
 <strong>Input:</strong> nestedList = [[1,1],2,[1,1]]
 <strong>Output:</strong> 8
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex2.png" style="width: 349px; height: 192px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0364.Nested%20List%20Weight%20Sum%20II/images/nestedlistweightsumiiex2.png" style="width: 349px; height: 192px;" />
 <pre>
 <strong>Input:</strong> nestedList = [1,[4,[6]]]
 <strong>Output:</strong> 17
diff --git a/solution/0300-0399/0366.Find Leaves of Binary Tree/README_EN.md b/solution/0300-0399/0366.Find Leaves of Binary Tree/README_EN.md
index a9cc90dfd4a35..b9e5eaee187b1 100644
--- a/solution/0300-0399/0366.Find Leaves of Binary Tree/README_EN.md	
+++ b/solution/0300-0399/0366.Find Leaves of Binary Tree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0366.Find%20Leaves%20of%20Binary%20Tree/images/remleaves-tree.jpg" style="width: 500px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0366.Find%20Leaves%20of%20Binary%20Tree/images/remleaves-tree.jpg" style="width: 500px; height: 215px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5]
 <strong>Output:</strong> [[4,5,3],[2],[1]]
diff --git a/solution/0300-0399/0370.Range Addition/README_EN.md b/solution/0300-0399/0370.Range Addition/README_EN.md
index ad928f924270d..df4be0d80faf0 100644
--- a/solution/0300-0399/0370.Range Addition/README_EN.md	
+++ b/solution/0300-0399/0370.Range Addition/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0370.Range%20Addition/images/rangeadd-grid.jpg" style="width: 413px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0370.Range%20Addition/images/rangeadd-grid.jpg" style="width: 413px; height: 573px;" />
 <pre>
 <strong>Input:</strong> length = 5, updates = [[1,3,2],[2,4,3],[0,2,-2]]
 <strong>Output:</strong> [-2,0,3,5,3]
diff --git a/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README.md b/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README.md
index df3e3bc343e92..9268f2ab5b942 100644
--- a/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README.md	
+++ b/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README.md	
@@ -55,7 +55,7 @@
 
 <!-- 这里可写通用的实现逻辑 -->
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0373.Find%20K%20Pairs%20with%20Smallest%20Sums/images/demo.png"/>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0373.Find%20K%20Pairs%20with%20Smallest%20Sums/images/demo.png"/>
 
 <!-- tabs:start -->
 
diff --git a/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README_EN.md b/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README_EN.md
index 7a3a060acd27e..2ac2bcd9d87b1 100644
--- a/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README_EN.md	
+++ b/solution/0300-0399/0373.Find K Pairs with Smallest Sums/README_EN.md	
@@ -47,7 +47,7 @@
 
 ## Solutions
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0373.Find%20K%20Pairs%20with%20Smallest%20Sums/images/demo.png"/>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0373.Find%20K%20Pairs%20with%20Smallest%20Sums/images/demo.png"/>
 
 <!-- tabs:start -->
 
diff --git a/solution/0300-0399/0375.Guess Number Higher or Lower II/README.md b/solution/0300-0399/0375.Guess Number Higher or Lower II/README.md
index 2eb571db599b0..6c92e64eee3c5 100644
--- a/solution/0300-0399/0375.Guess Number Higher or Lower II/README.md	
+++ b/solution/0300-0399/0375.Guess Number Higher or Lower II/README.md	
@@ -21,7 +21,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0375.Guess%20Number%20Higher%20or%20Lower%20II/images/graph.png" style="width: 505px; height: 388px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0375.Guess%20Number%20Higher%20or%20Lower%20II/images/graph.png" style="width: 505px; height: 388px;" />
 <pre>
 <strong>输入：</strong>n = 10
 <strong>输出：</strong>16
diff --git a/solution/0300-0399/0375.Guess Number Higher or Lower II/README_EN.md b/solution/0300-0399/0375.Guess Number Higher or Lower II/README_EN.md
index efa6389b2c6b7..7c7f9407c08ea 100644
--- a/solution/0300-0399/0375.Guess Number Higher or Lower II/README_EN.md	
+++ b/solution/0300-0399/0375.Guess Number Higher or Lower II/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0375.Guess%20Number%20Higher%20or%20Lower%20II/images/graph.png" style="width: 505px; height: 388px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0375.Guess%20Number%20Higher%20or%20Lower%20II/images/graph.png" style="width: 505px; height: 388px;" />
 <pre>
 <strong>Input:</strong> n = 10
 <strong>Output:</strong> 16
diff --git a/solution/0300-0399/0382.Linked List Random Node/README.md b/solution/0300-0399/0382.Linked List Random Node/README.md
index f44a001a6ca5c..2d859d3a35e37 100644
--- a/solution/0300-0399/0382.Linked List Random Node/README.md	
+++ b/solution/0300-0399/0382.Linked List Random Node/README.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/getrand-linked-list.jpg" style="width: 302px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/getrand-linked-list.jpg" style="width: 302px; height: 62px;" />
 <pre>
 <strong>输入</strong>
 ["Solution", "getRandom", "getRandom", "getRandom", "getRandom", "getRandom"]
@@ -64,7 +64,7 @@ solution.getRandom(); // 返回 3
 
 **证明**：第 m 个对象最终被选中的概率 P = `选择 m 的概率 × 其后面所有对象不被选择的概率`，即：
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/demo.gif"/>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/demo.gif"/>
 
 思路同：[398. 随机数索引](/solution/0300-0399/0398.Random%20Pick%20Index/README.md)
 
diff --git a/solution/0300-0399/0382.Linked List Random Node/README_EN.md b/solution/0300-0399/0382.Linked List Random Node/README_EN.md
index 7566030acc0e1..d6942597b0430 100644
--- a/solution/0300-0399/0382.Linked List Random Node/README_EN.md	
+++ b/solution/0300-0399/0382.Linked List Random Node/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/getrand-linked-list.jpg" style="width: 302px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0382.Linked%20List%20Random%20Node/images/getrand-linked-list.jpg" style="width: 302px; height: 62px;" />
 <pre>
 <strong>Input</strong>
 [&quot;Solution&quot;, &quot;getRandom&quot;, &quot;getRandom&quot;, &quot;getRandom&quot;, &quot;getRandom&quot;, &quot;getRandom&quot;]
diff --git a/solution/0300-0399/0388.Longest Absolute File Path/README.md b/solution/0300-0399/0388.Longest Absolute File Path/README.md
index 075a6a9eb4146..f6e90a70ac063 100644
--- a/solution/0300-0399/0388.Longest Absolute File Path/README.md	
+++ b/solution/0300-0399/0388.Longest Absolute File Path/README.md	
@@ -8,7 +8,7 @@
 
 <p>假设有一个同时存储文件和目录的文件系统。下图展示了文件系统的一个示例：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/mdir.jpg" style="height: 142px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/mdir.jpg" style="height: 142px; width: 300px;" /></p>
 
 <p>这里将 <code>dir</code> 作为根目录中的唯一目录。<code>dir</code> 包含两个子目录 <code>subdir1</code> 和 <code>subdir2</code> 。<code>subdir1</code> 包含文件 <code>file1.ext</code> 和子目录 <code>subsubdir1</code>；<code>subdir2</code> 包含子目录 <code>subsubdir2</code>，该子目录下包含文件 <code>file2.ext</code> 。</p>
 
@@ -33,7 +33,7 @@ dir
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir1.jpg" style="height: 101px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir1.jpg" style="height: 101px; width: 200px;" />
 <pre>
 <strong>输入：</strong>input = "dir\n\tsubdir1\n\tsubdir2\n\t\tfile.ext"
 <strong>输出：</strong>20
@@ -41,7 +41,7 @@ dir
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir2.jpg" style="height: 151px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir2.jpg" style="height: 151px; width: 300px;" />
 <pre>
 <strong>输入：</strong>input = "dir\n\tsubdir1\n\t\tfile1.ext\n\t\tsubsubdir1\n\tsubdir2\n\t\tsubsubdir2\n\t\t\tfile2.ext"
 <strong>输出：</strong>32
diff --git a/solution/0300-0399/0388.Longest Absolute File Path/README_EN.md b/solution/0300-0399/0388.Longest Absolute File Path/README_EN.md
index ec75f88847d40..8b0a9f6b2af55 100644
--- a/solution/0300-0399/0388.Longest Absolute File Path/README_EN.md	
+++ b/solution/0300-0399/0388.Longest Absolute File Path/README_EN.md	
@@ -6,7 +6,7 @@
 
 <p>Suppose we have a file system that stores both files and directories. An example of one system is represented in the following picture:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/mdir.jpg" style="width: 681px; height: 322px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/mdir.jpg" style="width: 681px; height: 322px;" /></p>
 
 <p>Here, we have <code>dir</code> as the only directory in the root. <code>dir</code> contains two subdirectories, <code>subdir1</code> and <code>subdir2</code>. <code>subdir1</code> contains a file <code>file1.ext</code> and subdirectory <code>subsubdir1</code>. <code>subdir2</code> contains a subdirectory <code>subsubdir2</code>, which contains a file <code>file2.ext</code>.</p>
 
@@ -32,7 +32,7 @@ dir
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir1.jpg" style="width: 401px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir1.jpg" style="width: 401px; height: 202px;" />
 <pre>
 <strong>Input:</strong> input = &quot;dir\n\tsubdir1\n\tsubdir2\n\t\tfile.ext&quot;
 <strong>Output:</strong> 20
@@ -40,7 +40,7 @@ dir
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir2.jpg" style="width: 641px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0388.Longest%20Absolute%20File%20Path/images/dir2.jpg" style="width: 641px; height: 322px;" />
 <pre>
 <strong>Input:</strong> input = &quot;dir\n\tsubdir1\n\t\tfile1.ext\n\t\tsubsubdir1\n\tsubdir2\n\t\tsubsubdir2\n\t\t\tfile2.ext&quot;
 <strong>Output:</strong> 32
diff --git a/solution/0300-0399/0391.Perfect Rectangle/README.md b/solution/0300-0399/0391.Perfect Rectangle/README.md
index 2fe0cb8e7c377..02e3f2ee147ad 100644
--- a/solution/0300-0399/0391.Perfect Rectangle/README.md	
+++ b/solution/0300-0399/0391.Perfect Rectangle/README.md	
@@ -12,7 +12,7 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perectrec1-plane.jpg" style="height: 294px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perectrec1-plane.jpg" style="height: 294px; width: 300px;" />
 <pre>
 <strong>输入：</strong>rectangles = [[1,1,3,3],[3,1,4,2],[3,2,4,4],[1,3,2,4],[2,3,3,4]]
 <strong>输出：</strong>true
@@ -20,14 +20,14 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfectrec2-plane.jpg" style="height: 294px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfectrec2-plane.jpg" style="height: 294px; width: 300px;" />
 <pre>
 <strong>输入：</strong>rectangles = [[1,1,2,3],[1,3,2,4],[3,1,4,2],[3,2,4,4]]
 <strong>输出：</strong>false
 <strong>解释：</strong>两个矩形之间有间隔，无法覆盖成一个矩形。</pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfecrrec4-plane.jpg" style="height: 294px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfecrrec4-plane.jpg" style="height: 294px; width: 300px;" />
 <pre>
 <strong>输入：</strong>rectangles = [[1,1,3,3],[3,1,4,2],[1,3,2,4],[2,2,4,4]]
 <strong>输出：</strong>false
diff --git a/solution/0300-0399/0391.Perfect Rectangle/README_EN.md b/solution/0300-0399/0391.Perfect Rectangle/README_EN.md
index e618bce73c8fd..c6e1afb6e4f7b 100644
--- a/solution/0300-0399/0391.Perfect Rectangle/README_EN.md	
+++ b/solution/0300-0399/0391.Perfect Rectangle/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perectrec1-plane.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perectrec1-plane.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[1,1,3,3],[3,1,4,2],[3,2,4,4],[1,3,2,4],[2,3,3,4]]
 <strong>Output:</strong> true
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfectrec2-plane.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfectrec2-plane.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[1,1,2,3],[1,3,2,4],[3,1,4,2],[3,2,4,4]]
 <strong>Output:</strong> false
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfecrrec4-plane.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0391.Perfect%20Rectangle/images/perfecrrec4-plane.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[1,1,3,3],[3,1,4,2],[1,3,2,4],[2,2,4,4]]
 <strong>Output:</strong> false
diff --git a/solution/0300-0399/0398.Random Pick Index/README.md b/solution/0300-0399/0398.Random Pick Index/README.md
index 74ed36a8dfbf6..89f8b8b9baef5 100644
--- a/solution/0300-0399/0398.Random Pick Index/README.md	
+++ b/solution/0300-0399/0398.Random Pick Index/README.md	
@@ -62,7 +62,7 @@ solution.pick(3); // 随机返回索引 2, 3 或者 4 之一。每个索引的
 
 **证明**：第 m 个对象最终被选中的概率 P = `选择 m 的概率 × 其后面所有对象不被选择的概率`，即：
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0398.Random%20Pick%20Index/images/demo.gif"/>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0300-0399/0398.Random%20Pick%20Index/images/demo.gif"/>
 
 思路同：[382. 链表随机节点](/solution/0300-0399/0382.Linked%20List%20Random%20Node/README.md)
 
diff --git a/solution/0400-0499/0401.Binary Watch/README.md b/solution/0400-0499/0401.Binary Watch/README.md
index 959c531255a79..f4763cbf6c9be 100644
--- a/solution/0400-0499/0401.Binary Watch/README.md	
+++ b/solution/0400-0499/0401.Binary Watch/README.md	
@@ -12,7 +12,7 @@
 	<li>例如，下面的二进制手表读取 <code>"3:25"</code> 。</li>
 </ul>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0401.Binary%20Watch/images/binary_clock_samui_moon.jpg" style="height: 300px; width" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0401.Binary%20Watch/images/binary_clock_samui_moon.jpg" style="height: 300px; width" /></p>
 
 <p><small><em>（图源：<a href="https://commons.m.wikimedia.org/wiki/File:Binary_clock_samui_moon.jpg">WikiMedia - Binary clock samui moon.jpg</a> ，许可协议：<a href="https://creativecommons.org/licenses/by-sa/3.0/deed.en">Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)</a> ）</em></small></p>
 
diff --git a/solution/0400-0499/0401.Binary Watch/README_EN.md b/solution/0400-0499/0401.Binary Watch/README_EN.md
index 4dfec064ba725..1960358466757 100644
--- a/solution/0400-0499/0401.Binary Watch/README_EN.md	
+++ b/solution/0400-0499/0401.Binary Watch/README_EN.md	
@@ -10,7 +10,7 @@
 	<li>For example, the below binary watch reads <code>&quot;4:51&quot;</code>.</li>
 </ul>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0401.Binary%20Watch/images/binarywatch.jpg" style="width: 500px; height: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0401.Binary%20Watch/images/binarywatch.jpg" style="width: 500px; height: 500px;" /></p>
 
 <p>Given an integer <code>turnedOn</code> which represents the number of LEDs that are currently on, return <em>all possible times the watch could represent</em>. You may return the answer in <strong>any order</strong>.</p>
 
diff --git a/solution/0400-0499/0404.Sum of Left Leaves/README.md b/solution/0400-0499/0404.Sum of Left Leaves/README.md
index e00f7820d22f4..411c50e1e02d7 100644
--- a/solution/0400-0499/0404.Sum of Left Leaves/README.md	
+++ b/solution/0400-0499/0404.Sum of Left Leaves/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0404.Sum%20of%20Left%20Leaves/images/leftsum-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0404.Sum%20of%20Left%20Leaves/images/leftsum-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> root = [3,9,20,null,null,15,7] 
diff --git a/solution/0400-0499/0404.Sum of Left Leaves/README_EN.md b/solution/0400-0499/0404.Sum of Left Leaves/README_EN.md
index 4b7612ec78315..3fd8c6af72b8c 100644
--- a/solution/0400-0499/0404.Sum of Left Leaves/README_EN.md	
+++ b/solution/0400-0499/0404.Sum of Left Leaves/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0404.Sum%20of%20Left%20Leaves/images/leftsum-tree.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0404.Sum%20of%20Left%20Leaves/images/leftsum-tree.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> 24
diff --git a/solution/0400-0499/0407.Trapping Rain Water II/README.md b/solution/0400-0499/0407.Trapping Rain Water II/README.md
index f9ba4c0f114c6..8fd7693b3c095 100644
--- a/solution/0400-0499/0407.Trapping Rain Water II/README.md	
+++ b/solution/0400-0499/0407.Trapping Rain Water II/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap1-3d.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap1-3d.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> heightMap = [[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]]
@@ -22,7 +22,7 @@
 
 <p><strong>示例&nbsp;2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap2-3d.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap2-3d.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> heightMap = [[3,3,3,3,3],[3,2,2,2,3],[3,2,1,2,3],[3,2,2,2,3],[3,3,3,3,3]]
diff --git a/solution/0400-0499/0407.Trapping Rain Water II/README_EN.md b/solution/0400-0499/0407.Trapping Rain Water II/README_EN.md
index 2fcef0be99d65..86267532334a7 100644
--- a/solution/0400-0499/0407.Trapping Rain Water II/README_EN.md	
+++ b/solution/0400-0499/0407.Trapping Rain Water II/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap1-3d.jpg" style="width: 361px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap1-3d.jpg" style="width: 361px; height: 321px;" />
 <pre>
 <strong>Input:</strong> heightMap = [[1,4,3,1,3,2],[3,2,1,3,2,4],[2,3,3,2,3,1]]
 <strong>Output:</strong> 4
@@ -18,7 +18,7 @@ The total volume of water trapped is 4.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap2-3d.jpg" style="width: 401px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0407.Trapping%20Rain%20Water%20II/images/trap2-3d.jpg" style="width: 401px; height: 321px;" />
 <pre>
 <strong>Input:</strong> heightMap = [[3,3,3,3,3],[3,2,2,2,3],[3,2,1,2,3],[3,2,2,2,3],[3,3,3,3,3]]
 <strong>Output:</strong> 10
diff --git a/solution/0400-0499/0417.Pacific Atlantic Water Flow/README.md b/solution/0400-0499/0417.Pacific Atlantic Water Flow/README.md
index 6670596eaefb7..a9db096af53e2 100644
--- a/solution/0400-0499/0417.Pacific Atlantic Water Flow/README.md	
+++ b/solution/0400-0499/0417.Pacific Atlantic Water Flow/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0417.Pacific%20Atlantic%20Water%20Flow/images/waterflow-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0417.Pacific%20Atlantic%20Water%20Flow/images/waterflow-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> heights = [[1,2,2,3,5],[3,2,3,4,4],[2,4,5,3,1],[6,7,1,4,5],[5,1,1,2,4]]
diff --git a/solution/0400-0499/0417.Pacific Atlantic Water Flow/README_EN.md b/solution/0400-0499/0417.Pacific Atlantic Water Flow/README_EN.md
index c06dcf498a5f9..18bad3f9084e4 100644
--- a/solution/0400-0499/0417.Pacific Atlantic Water Flow/README_EN.md	
+++ b/solution/0400-0499/0417.Pacific Atlantic Water Flow/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0417.Pacific%20Atlantic%20Water%20Flow/images/waterflow-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0417.Pacific%20Atlantic%20Water%20Flow/images/waterflow-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> heights = [[1,2,2,3,5],[3,2,3,4,4],[2,4,5,3,1],[6,7,1,4,5],[5,1,1,2,4]]
 <strong>Output:</strong> [[0,4],[1,3],[1,4],[2,2],[3,0],[3,1],[4,0]]
diff --git a/solution/0400-0499/0419.Battleships in a Board/README.md b/solution/0400-0499/0419.Battleships in a Board/README.md
index 428faa5912641..6c72e2caa4398 100644
--- a/solution/0400-0499/0419.Battleships in a Board/README.md	
+++ b/solution/0400-0499/0419.Battleships in a Board/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0419.Battleships%20in%20a%20Board/images/battelship-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0419.Battleships%20in%20a%20Board/images/battelship-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>输入：</strong>board = [["X",".",".","X"],[".",".",".","X"],[".",".",".","X"]]
 <strong>输出：</strong>2
diff --git a/solution/0400-0499/0419.Battleships in a Board/README_EN.md b/solution/0400-0499/0419.Battleships in a Board/README_EN.md
index a359308c9cf8e..b0c19f97ec576 100644
--- a/solution/0400-0499/0419.Battleships in a Board/README_EN.md	
+++ b/solution/0400-0499/0419.Battleships in a Board/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0419.Battleships%20in%20a%20Board/images/battelship-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0419.Battleships%20in%20a%20Board/images/battelship-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;X&quot;,&quot;.&quot;,&quot;.&quot;,&quot;X&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;X&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;X&quot;]]
 <strong>Output:</strong> 2
diff --git a/solution/0400-0499/0422.Valid Word Square/README_EN.md b/solution/0400-0499/0422.Valid Word Square/README_EN.md
index 1999516765e60..9bd69442f22a7 100644
--- a/solution/0400-0499/0422.Valid Word Square/README_EN.md	
+++ b/solution/0400-0499/0422.Valid Word Square/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq1-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq1-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> words = [&quot;abcd&quot;,&quot;bnrt&quot;,&quot;crmy&quot;,&quot;dtye&quot;]
 <strong>Output:</strong> true
@@ -23,7 +23,7 @@ Therefore, it is a valid word square.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq2-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq2-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> words = [&quot;abcd&quot;,&quot;bnrt&quot;,&quot;crm&quot;,&quot;dt&quot;]
 <strong>Output:</strong> true
@@ -36,7 +36,7 @@ Therefore, it is a valid word square.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq3-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0422.Valid%20Word%20Square/images/validsq3-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> words = [&quot;ball&quot;,&quot;area&quot;,&quot;read&quot;,&quot;lady&quot;]
 <strong>Output:</strong> false
diff --git a/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README.md b/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README.md
index 19bb17c39ea0f..5f2f84c4d8daf 100644
--- a/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README.md	
+++ b/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README.md	
@@ -19,11 +19,11 @@
 <pre>
 <strong>输入：</strong>root = [4,2,5,1,3] 
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturndll.png" style="width: 400px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturndll.png" style="width: 400px;" />
 <strong>输出：</strong>[1,2,3,4,5]
 
 <strong>解释：</strong>下图显示了转化后的二叉搜索树，实线表示后继关系，虚线表示前驱关系。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturnbst.png" style="width: 400px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturnbst.png" style="width: 400px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README_EN.md b/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README_EN.md
index 5416c628314e2..68c68be1096e3 100644
--- a/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README_EN.md	
+++ b/solution/0400-0499/0426.Convert Binary Search Tree to Sorted Doubly Linked List/README_EN.md	
@@ -13,16 +13,16 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdlloriginalbst.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdlloriginalbst.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [4,2,5,1,3]
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturndll.png" style="width: 100%; max-width: 450px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturndll.png" style="width: 100%; max-width: 450px;" />
 <strong>Output:</strong> [1,2,3,4,5]
 
 <strong>Explanation:</strong> The figure below shows the transformed BST. The solid line indicates the successor relationship, while the dashed line means the predecessor relationship.
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturnbst.png" style="width: 100%; max-width: 450px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0426.Convert%20Binary%20Search%20Tree%20to%20Sorted%20Doubly%20Linked%20List/images/bstdllreturnbst.png" style="width: 100%; max-width: 450px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0400-0499/0427.Construct Quad Tree/README.md b/solution/0400-0499/0427.Construct Quad Tree/README.md
index 83653ea40da99..00917306f0e24 100644
--- a/solution/0400-0499/0427.Construct Quad Tree/README.md	
+++ b/solution/0400-0499/0427.Construct Quad Tree/README.md	
@@ -36,7 +36,7 @@
 	<li>使用适当的子网格递归每个子节点。</li>
 </ol>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/new_top.png" style="height: 181px; width: 777px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/new_top.png" style="height: 181px; width: 777px;"></p>
 
 <p>如果你想了解更多关于四叉树的内容，可以参考 <a href="https://en.wikipedia.org/wiki/Quadtree">wiki</a> 。</p>
 
@@ -52,18 +52,18 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/grid1.png" style="height: 99px; width: 777px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/grid1.png" style="height: 99px; width: 777px;"></p>
 
 <pre><strong>输入：</strong>grid = [[0,1],[1,0]]
 <strong>输出：</strong>[[0,1],[1,0],[1,1],[1,1],[1,0]]
 <strong>解释：</strong>此示例的解释如下：
 请注意，在下面四叉树的图示中，0 表示 false，1 表示 True 。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e1tree.png" style="height: 186px; width: 777px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e1tree.png" style="height: 186px; width: 777px;">
 </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2mat.png" style="height: 343px; width: 777px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2mat.png" style="height: 343px; width: 777px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,1,1,1,1],[1,1,1,1,1,1,1,1],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0]]
 <strong>输出：</strong>[[0,1],[1,1],[0,1],[1,1],[1,0],null,null,null,null,[1,0],[1,0],[1,1],[1,1]]
@@ -71,7 +71,7 @@
 topLeft，bottomLeft 和 bottomRight 均具有相同的值。
 topRight 具有不同的值，因此我们将其再分为 4 个子网格，这样每个子网格都具有相同的值。
 解释如下图所示：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2tree.png" style="height: 328px; width: 777px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2tree.png" style="height: 328px; width: 777px;">
 </pre>
 
 <p><strong>示例 3：</strong></p>
diff --git a/solution/0400-0499/0427.Construct Quad Tree/README_EN.md b/solution/0400-0499/0427.Construct Quad Tree/README_EN.md
index 4f9424b4feefb..b37a57c631200 100644
--- a/solution/0400-0499/0427.Construct Quad Tree/README_EN.md	
+++ b/solution/0400-0499/0427.Construct Quad Tree/README_EN.md	
@@ -34,7 +34,7 @@ class Node {
 	<li>If the current grid has different values, set <code>isLeaf</code> to False and set <code>val</code> to any value and divide the current grid into four sub-grids as shown in the photo.</li>
 	<li>Recurse for each of the children with the proper sub-grid.</li>
 </ol>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/new_top.png" style="width: 777px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/new_top.png" style="width: 777px; height: 181px;" />
 <p>If you want to know more about the Quad-Tree, you can refer to the <a href="https://en.wikipedia.org/wiki/Quadtree">wiki</a>.</p>
 
 <p><strong>Quad-Tree format:</strong></p>
@@ -47,18 +47,18 @@ class Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/grid1.png" style="width: 777px; height: 99px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/grid1.png" style="width: 777px; height: 99px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1],[1,0]]
 <strong>Output:</strong> [[0,1],[1,0],[1,1],[1,1],[1,0]]
 <strong>Explanation:</strong> The explanation of this example is shown below:
 Notice that 0 represnts False and 1 represents True in the photo representing the Quad-Tree.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e1tree.png" style="width: 777px; height: 186px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e1tree.png" style="width: 777px; height: 186px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2mat.png" style="width: 777px; height: 343px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2mat.png" style="width: 777px; height: 343px;" /></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,1,1,1,1],[1,1,1,1,1,1,1,1],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0],[1,1,1,1,0,0,0,0]]
@@ -67,7 +67,7 @@ Notice that 0 represnts False and 1 represents True in the photo representing th
 The topLeft, bottomLeft and bottomRight each has the same value.
 The topRight have different values so we divide it into 4 sub-grids where each has the same value.
 Explanation is shown in the photo below:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2tree.png" style="width: 777px; height: 328px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0427.Construct%20Quad%20Tree/images/e2tree.png" style="width: 777px; height: 328px;" />
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README.md b/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README.md
index 3de9020a0b2dd..f61dcb43d53d7 100644
--- a/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README.md	
+++ b/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/narytreeexample.png" style="height: 321px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/narytreeexample.png" style="height: 321px; width: 500px;" /></p>
 
 <p>&nbsp;</p>
 
@@ -22,7 +22,7 @@
 
 <p>或者，您可以遵循 LeetCode 的层序遍历序列化格式，其中每组孩子节点由空值分隔。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/sample_4_964.png" style="height: 454px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/sample_4_964.png" style="height: 454px; width: 500px;" /></p>
 
 <p>例如，上面的树可以序列化为 <code>[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]</code></p>
 
diff --git a/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README_EN.md b/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README_EN.md
index ac3cfe5d345c4..80fa5d5b3d854 100644
--- a/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README_EN.md	
+++ b/solution/0400-0499/0428.Serialize and Deserialize N-ary Tree/README_EN.md	
@@ -9,13 +9,13 @@
 <p>Design an algorithm to serialize and deserialize an N-ary tree. An N-ary tree is a rooted tree in which each node has no more than N children. There is no restriction on how your serialization/deserialization algorithm should work. You just need to ensure that an N-ary tree can be serialized to a string and this string can be deserialized to the original tree structure.</p>
 
 <p>For example, you may serialize the following <code>3-ary</code> tree</p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/narytreeexample.png" style="width: 500px; max-width: 300px; height: 321px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/narytreeexample.png" style="width: 500px; max-width: 300px; height: 321px;" />
 <p>&nbsp;</p>
 
 <p>as <code>[1 [3[5 6] 2 4]]</code>. Note that this is just an example, you do not necessarily need to follow this format.</p>
 
 <p>Or you can follow LeetCode&#39;s level order traversal serialization format, where each group of children is separated by the null value.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/sample_4_964.png" style="width: 500px; height: 454px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0428.Serialize%20and%20Deserialize%20N-ary%20Tree/images/sample_4_964.png" style="width: 500px; height: 454px;" />
 <p>&nbsp;</p>
 
 <p>For example, the above tree may be serialized as <code>[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]</code>.</p>
diff --git a/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README.md b/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README.md
index bedd637f9ec41..9f36c922d3afd 100644
--- a/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README.md	
+++ b/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README_EN.md b/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README_EN.md
index 52d1bb193f949..f5680b44c4a6f 100644
--- a/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README_EN.md	
+++ b/solution/0400-0499/0429.N-ary Tree Level Order Traversal/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
@@ -20,7 +20,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0429.N-ary%20Tree%20Level%20Order%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README.md b/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README.md
index edc382ceb5acb..93eed7ad621bb 100644
--- a/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README.md	
+++ b/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README.md	
@@ -16,26 +16,26 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten11.jpg" style="height:339px; width:700px" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten11.jpg" style="height:339px; width:700px" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5,6,null,null,null,7,8,9,10,null,null,11,12]
 <strong>输出：</strong>[1,2,3,7,8,11,12,9,10,4,5,6]
 <strong>解释：</strong>输入的多级列表如上图所示。
 扁平化后的链表如下图：
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten12.jpg" style="height:69px; width:1000px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten12.jpg" style="height:69px; width:1000px" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten2.1jpg" style="height:200px; width:200px" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten2.1jpg" style="height:200px; width:200px" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,null,3]
 <strong>输出：</strong>[1,3,2]
 <strong>解释：</strong>输入的多级列表如上图所示。
 扁平化后的链表如下图：
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/list.jpg" style="height:87px; width:300px" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/list.jpg" style="height:87px; width:300px" />
 </pre>
 
 <p><strong>示例 3：</strong></p>
diff --git a/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README_EN.md b/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README_EN.md
index c3d17b8afd42d..c6855243591dc 100644
--- a/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README_EN.md	
+++ b/solution/0400-0499/0430.Flatten a Multilevel Doubly Linked List/README_EN.md	
@@ -12,23 +12,23 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten11.jpg" style="width: 700px; height: 339px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten11.jpg" style="width: 700px; height: 339px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5,6,null,null,null,7,8,9,10,null,null,11,12]
 <strong>Output:</strong> [1,2,3,7,8,11,12,9,10,4,5,6]
 <strong>Explanation:</strong> The multilevel linked list in the input is shown.
 After flattening the multilevel linked list it becomes:
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten12.jpg" style="width: 1000px; height: 69px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten12.jpg" style="width: 1000px; height: 69px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten2.1jpg" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/flatten2.1jpg" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,null,3]
 <strong>Output:</strong> [1,3,2]
 <strong>Explanation:</strong> The multilevel linked list in the input is shown.
 After flattening the multilevel linked list it becomes:
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/list.jpg" style="width: 300px; height: 87px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/images/list.jpg" style="width: 300px; height: 87px;" />
 </pre>
 
 <p><strong>Example 3:</strong></p>
diff --git a/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README.md b/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README.md
index cb672026c2cf0..1e1ee9918a5b4 100644
--- a/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README.md	
+++ b/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0431.Encode%20N-ary%20Tree%20to%20Binary%20Tree/images/narytreebinarytreeexample.png" style="width: 500px;"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0431.Encode%20N-ary%20Tree%20to%20Binary%20Tree/images/narytreebinarytreeexample.png" style="width: 500px;"></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README_EN.md b/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README_EN.md
index c9b87d49ddcd2..bb32de7afeb07 100644
--- a/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README_EN.md	
+++ b/solution/0400-0499/0431.Encode N-ary Tree to Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>For example, you may encode the following <code>3-ary</code> tree to a binary tree in this way:</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0431.Encode%20N-ary%20Tree%20to%20Binary%20Tree/images/narytreebinarytreeexample.png" style="width: 100%; max-width: 640px" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0431.Encode%20N-ary%20Tree%20to%20Binary%20Tree/images/narytreebinarytreeexample.png" style="width: 100%; max-width: 640px" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
diff --git a/solution/0400-0499/0437.Path Sum III/README.md b/solution/0400-0499/0437.Path Sum III/README.md
index 1cecd20920e09..618d83b1aa1e2 100644
--- a/solution/0400-0499/0437.Path Sum III/README.md	
+++ b/solution/0400-0499/0437.Path Sum III/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0437.Path%20Sum%20III/images/pathsum3-1-tree.jpg" style="width: 452px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0437.Path%20Sum%20III/images/pathsum3-1-tree.jpg" style="width: 452px; " /></p>
 
 <pre>
 <strong>输入：</strong>root = [10,5,-3,3,2,null,11,3,-2,null,1], targetSum = 8
diff --git a/solution/0400-0499/0437.Path Sum III/README_EN.md b/solution/0400-0499/0437.Path Sum III/README_EN.md
index fec7a49d77e48..7598f93fe7a4e 100644
--- a/solution/0400-0499/0437.Path Sum III/README_EN.md	
+++ b/solution/0400-0499/0437.Path Sum III/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0437.Path%20Sum%20III/images/pathsum3-1-tree.jpg" style="width: 450px; height: 386px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0437.Path%20Sum%20III/images/pathsum3-1-tree.jpg" style="width: 450px; height: 386px;" />
 <pre>
 <strong>Input:</strong> root = [10,5,-3,3,2,null,11,3,-2,null,1], targetSum = 8
 <strong>Output:</strong> 3
diff --git a/solution/0400-0499/0441.Arranging Coins/README.md b/solution/0400-0499/0441.Arranging Coins/README.md
index 774a42929097c..4c97bb59868c9 100644
--- a/solution/0400-0499/0441.Arranging Coins/README.md	
+++ b/solution/0400-0499/0441.Arranging Coins/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>n = 5
 <strong>输出：</strong>2
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins2-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins2-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>输入：</strong>n = 8
 <strong>输出：</strong>3
diff --git a/solution/0400-0499/0441.Arranging Coins/README_EN.md b/solution/0400-0499/0441.Arranging Coins/README_EN.md
index 89b316a6d70df..8da45fe63df35 100644
--- a/solution/0400-0499/0441.Arranging Coins/README_EN.md	
+++ b/solution/0400-0499/0441.Arranging Coins/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> n = 5
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins2-grid.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0441.Arranging%20Coins/images/arrangecoins2-grid.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> n = 8
 <strong>Output:</strong> 3
diff --git a/solution/0400-0499/0445.Add Two Numbers II/README.md b/solution/0400-0499/0445.Add Two Numbers II/README.md
index 0a842e96a016e..5c2da04451a81 100644
--- a/solution/0400-0499/0445.Add Two Numbers II/README.md	
+++ b/solution/0400-0499/0445.Add Two Numbers II/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0445.Add%20Two%20Numbers%20II/images/1626420025-fZfzMX-image.png" style="width: 302px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0445.Add%20Two%20Numbers%20II/images/1626420025-fZfzMX-image.png" style="width: 302px; " /></p>
 
 <pre>
 <strong>输入：</strong>l1 = [7,2,4,3], l2 = [5,6,4]
diff --git a/solution/0400-0499/0445.Add Two Numbers II/README_EN.md b/solution/0400-0499/0445.Add Two Numbers II/README_EN.md
index 1ed7449b7c250..9f87f150e1c66 100644
--- a/solution/0400-0499/0445.Add Two Numbers II/README_EN.md	
+++ b/solution/0400-0499/0445.Add Two Numbers II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0445.Add%20Two%20Numbers%20II/images/sumii-linked-list.jpg" style="width: 523px; height: 342px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0445.Add%20Two%20Numbers%20II/images/sumii-linked-list.jpg" style="width: 523px; height: 342px;" />
 <pre>
 <strong>Input:</strong> l1 = [7,2,4,3], l2 = [5,6,4]
 <strong>Output:</strong> [7,8,0,7]
diff --git a/solution/0400-0499/0450.Delete Node in a BST/README.md b/solution/0400-0499/0450.Delete Node in a BST/README.md
index dd9d16ed4f5b3..5fb4293855b69 100644
--- a/solution/0400-0499/0450.Delete Node in a BST/README.md	
+++ b/solution/0400-0499/0450.Delete Node in a BST/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_1.jpg" style="width: 800px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_1.jpg" style="width: 800px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,7], key = 3
@@ -28,7 +28,7 @@
 一个正确的答案是 [5,4,6,2,null,null,7], 如下图所示。
 另一个正确答案是 [5,2,6,null,4,null,7]。
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_supp.jpg" style="width: 350px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_supp.jpg" style="width: 350px;" />
 </pre>
 
 <p><strong>示例 2:</strong></p>
diff --git a/solution/0400-0499/0450.Delete Node in a BST/README_EN.md b/solution/0400-0499/0450.Delete Node in a BST/README_EN.md
index 97ab6670f0514..284122e63ea0c 100644
--- a/solution/0400-0499/0450.Delete Node in a BST/README_EN.md	
+++ b/solution/0400-0499/0450.Delete Node in a BST/README_EN.md	
@@ -15,14 +15,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_1.jpg" style="width: 800px; height: 214px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_1.jpg" style="width: 800px; height: 214px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,7], key = 3
 <strong>Output:</strong> [5,4,6,2,null,null,7]
 <strong>Explanation:</strong> Given key to delete is 3. So we find the node with value 3 and delete it.
 One valid answer is [5,4,6,2,null,null,7], shown in the above BST.
 Please notice that another valid answer is [5,2,6,null,4,null,7] and it&#39;s also accepted.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_supp.jpg" style="width: 350px; height: 255px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0450.Delete%20Node%20in%20a%20BST/images/del_node_supp.jpg" style="width: 350px; height: 255px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0400-0499/0463.Island Perimeter/README.md b/solution/0400-0499/0463.Island Perimeter/README.md
index 418622e1d4c11..5d07005f6a51a 100644
--- a/solution/0400-0499/0463.Island Perimeter/README.md	
+++ b/solution/0400-0499/0463.Island Perimeter/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0463.Island%20Perimeter/images/island.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0463.Island%20Perimeter/images/island.png" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[0,1,0,0],[1,1,1,0],[0,1,0,0],[1,1,0,0]]
diff --git a/solution/0400-0499/0463.Island Perimeter/README_EN.md b/solution/0400-0499/0463.Island Perimeter/README_EN.md
index ab50609e04ad1..5bff163e3d9da 100644
--- a/solution/0400-0499/0463.Island Perimeter/README_EN.md	
+++ b/solution/0400-0499/0463.Island Perimeter/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0463.Island%20Perimeter/images/island.png" style="width: 221px; height: 213px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0463.Island%20Perimeter/images/island.png" style="width: 221px; height: 213px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,0,0],[1,1,1,0],[0,1,0,0],[1,1,0,0]]
 <strong>Output:</strong> 16
diff --git a/solution/0400-0499/0469.Convex Polygon/README.md b/solution/0400-0499/0469.Convex Polygon/README.md
index b4f9864c7383e..7d45a19bfbfd5 100644
--- a/solution/0400-0499/0469.Convex Polygon/README.md	
+++ b/solution/0400-0499/0469.Convex Polygon/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly1-plane.jpg" style="height: 294px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly1-plane.jpg" style="height: 294px; width: 300px;" /></p>
 
 <pre>
 <strong>输入:</strong> points = [[0,0],[0,5],[5,5],[5,0]]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly2-plane.jpg" style="height: 303px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly2-plane.jpg" style="height: 303px; width: 300px;" /></p>
 
 <pre>
 <strong>输入:</strong> points = [[0,0],[0,10],[10,10],[10,0],[5,5]]
diff --git a/solution/0400-0499/0469.Convex Polygon/README_EN.md b/solution/0400-0499/0469.Convex Polygon/README_EN.md
index 6a98e74f786d2..e36b0bff947d4 100644
--- a/solution/0400-0499/0469.Convex Polygon/README_EN.md	
+++ b/solution/0400-0499/0469.Convex Polygon/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly1-plane.jpg" style="width: 300px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly1-plane.jpg" style="width: 300px; height: 294px;" />
 <pre>
 <strong>Input:</strong> points = [[0,0],[0,5],[5,5],[5,0]]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly2-plane.jpg" style="width: 300px; height: 303px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0469.Convex%20Polygon/images/covpoly2-plane.jpg" style="width: 300px; height: 303px;" />
 <pre>
 <strong>Input:</strong> points = [[0,0],[0,10],[10,10],[10,0],[5,5]]
 <strong>Output:</strong> false
diff --git a/solution/0400-0499/0473.Matchsticks to Square/README.md b/solution/0400-0499/0473.Matchsticks to Square/README.md
index 9098f2f34870a..7398dc4abe01a 100644
--- a/solution/0400-0499/0473.Matchsticks to Square/README.md	
+++ b/solution/0400-0499/0473.Matchsticks to Square/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例&nbsp;1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0473.Matchsticks%20to%20Square/images/matchsticks1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0473.Matchsticks%20to%20Square/images/matchsticks1-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> matchsticks = [1,1,2,2,2]
diff --git a/solution/0400-0499/0473.Matchsticks to Square/README_EN.md b/solution/0400-0499/0473.Matchsticks to Square/README_EN.md
index fe80dc913c1e6..aed5d1d6c1a61 100644
--- a/solution/0400-0499/0473.Matchsticks to Square/README_EN.md	
+++ b/solution/0400-0499/0473.Matchsticks to Square/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0473.Matchsticks%20to%20Square/images/matchsticks1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0473.Matchsticks%20to%20Square/images/matchsticks1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> matchsticks = [1,1,2,2,2]
 <strong>Output:</strong> true
diff --git a/solution/0400-0499/0489.Robot Room Cleaner/README_EN.md b/solution/0400-0499/0489.Robot Room Cleaner/README_EN.md
index ca2bb27b79b89..3c6dc1bcb80ef 100644
--- a/solution/0400-0499/0489.Robot Room Cleaner/README_EN.md	
+++ b/solution/0400-0499/0489.Robot Room Cleaner/README_EN.md	
@@ -40,7 +40,7 @@ interface Robot {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0489.Robot%20Room%20Cleaner/images/lc-grid.jpg" style="width: 500px; height: 314px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0489.Robot%20Room%20Cleaner/images/lc-grid.jpg" style="width: 500px; height: 314px;" />
 <pre>
 <strong>Input:</strong> room = [[1,1,1,1,1,0,1,1],[1,1,1,1,1,0,1,1],[1,0,1,1,1,1,1,1],[0,0,0,1,0,0,0,0],[1,1,1,1,1,1,1,1]], row = 1, col = 3
 <strong>Output:</strong> Robot cleaned all rooms.
diff --git a/solution/0400-0499/0490.The Maze/README.md b/solution/0400-0499/0490.The Maze/README.md
index 02d5d5fcba638..e103afd15dd9c 100644
--- a/solution/0400-0499/0490.The Maze/README.md	
+++ b/solution/0400-0499/0490.The Maze/README.md	
@@ -18,7 +18,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>输入：</strong>maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [4,4]
 <strong>输出：</strong>true
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>输入：</strong>maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [3,2]
 <strong>输出：</strong>false
diff --git a/solution/0400-0499/0490.The Maze/README_EN.md b/solution/0400-0499/0490.The Maze/README_EN.md
index 759c91fdebbd1..bd9c31d6390a6 100644
--- a/solution/0400-0499/0490.The Maze/README_EN.md	
+++ b/solution/0400-0499/0490.The Maze/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [4,4]
 <strong>Output:</strong> true
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0490.The%20Maze/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [3,2]
 <strong>Output:</strong> false
diff --git a/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README.md b/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README.md
index fc7442e279dbb..24c049dd6dcac 100644
--- a/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README.md	
+++ b/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0497.Random%20Point%20in%20Non-overlapping%20Rectangles/images/lc-pickrandomrec.jpg" style="height: 539px; width: 419px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0497.Random%20Point%20in%20Non-overlapping%20Rectangles/images/lc-pickrandomrec.jpg" style="height: 539px; width: 419px;" /></p>
 
 <pre>
 <strong>输入: 
diff --git a/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README_EN.md b/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README_EN.md
index 9c9e7cdc0066e..d597089bcb497 100644
--- a/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README_EN.md	
+++ b/solution/0400-0499/0497.Random Point in Non-overlapping Rectangles/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0497.Random%20Point%20in%20Non-overlapping%20Rectangles/images/lc-pickrandomrec.jpg" style="width: 419px; height: 539px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0497.Random%20Point%20in%20Non-overlapping%20Rectangles/images/lc-pickrandomrec.jpg" style="width: 419px; height: 539px;" />
 <pre>
 <strong>Input</strong>
 [&quot;Solution&quot;, &quot;pick&quot;, &quot;pick&quot;, &quot;pick&quot;, &quot;pick&quot;, &quot;pick&quot;]
diff --git a/solution/0400-0499/0498.Diagonal Traverse/README.md b/solution/0400-0499/0498.Diagonal Traverse/README.md
index 20787661fb1dc..7f9966baa1ab4 100644
--- a/solution/0400-0499/0498.Diagonal Traverse/README.md	
+++ b/solution/0400-0499/0498.Diagonal Traverse/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0498.Diagonal%20Traverse/images/diag1-grid.jpg" style="width: 334px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0498.Diagonal%20Traverse/images/diag1-grid.jpg" style="width: 334px; height: 334px;" />
 <pre>
 <strong>输入：</strong>mat = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>输出：</strong>[1,2,4,7,5,3,6,8,9]
diff --git a/solution/0400-0499/0498.Diagonal Traverse/README_EN.md b/solution/0400-0499/0498.Diagonal Traverse/README_EN.md
index 47f33ec1fe9cc..9fa69aa13e9c4 100644
--- a/solution/0400-0499/0498.Diagonal Traverse/README_EN.md	
+++ b/solution/0400-0499/0498.Diagonal Traverse/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0498.Diagonal%20Traverse/images/diag1-grid.jpg" style="width: 334px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0498.Diagonal%20Traverse/images/diag1-grid.jpg" style="width: 334px; height: 334px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> [1,2,4,7,5,3,6,8,9]
diff --git a/solution/0400-0499/0499.The Maze III/README.md b/solution/0400-0499/0499.The Maze III/README.md
index 050ae47ab6907..caee4a03103d5 100644
--- a/solution/0400-0499/0499.The Maze III/README.md	
+++ b/solution/0400-0499/0499.The Maze III/README.md	
@@ -33,7 +33,7 @@
 第一条路径是 左 -&gt; 上 -&gt; 左, 记为 &quot;lul&quot;.
 第二条路径是 上 -&gt; 左, 记为 &#39;ul&#39;.
 两条路径都具有最短距离6, 但&#39;l&#39; &lt; &#39;u&#39;，故第一条路径字典序更小。因此输出&quot;lul&quot;。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze_2_example_1.png" style="width: 100%;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze_2_example_1.png" style="width: 100%;">
 </pre>
 
 <p><strong>示例&nbsp;2:</strong></p>
@@ -52,7 +52,7 @@
 <strong>输出:</strong> &quot;impossible&quot;
 
 <strong>示例:</strong> 球无法到达洞。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze_2_example_2.png" style="width: 100%;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze_2_example_2.png" style="width: 100%;">
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0400-0499/0499.The Maze III/README_EN.md b/solution/0400-0499/0499.The Maze III/README_EN.md
index 74a29d98f2f23..b97f0b8e8605a 100644
--- a/solution/0400-0499/0499.The Maze III/README_EN.md	
+++ b/solution/0400-0499/0499.The Maze III/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze3-1-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze3-1-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,0,0,0],[1,1,0,0,1],[0,0,0,0,0],[0,1,0,0,1],[0,1,0,0,0]], ball = [4,3], hole = [0,1]
 <strong>Output:</strong> &quot;lul&quot;
@@ -27,7 +27,7 @@ Both ways have shortest distance 6, but the first way is lexicographically small
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze3-2-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0400-0499/0499.The%20Maze%20III/images/maze3-2-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,0,0,0],[1,1,0,0,1],[0,0,0,0,0],[0,1,0,0,1],[0,1,0,0,0]], ball = [4,3], hole = [3,0]
 <strong>Output:</strong> &quot;impossible&quot;
diff --git a/solution/0500-0599/0500.Keyboard Row/README.md b/solution/0500-0599/0500.Keyboard Row/README.md
index 48e889034f760..342d15d82cae9 100644
--- a/solution/0500-0599/0500.Keyboard Row/README.md	
+++ b/solution/0500-0599/0500.Keyboard Row/README.md	
@@ -16,7 +16,7 @@
 	<li>第三行由字符 <code>"zxcvbnm"</code> 组成。</li>
 </ul>
 
-<p><img alt="American keyboard" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0500.Keyboard%20Row/images/keyboard.png" style="width: 100%; max-width: 600px" /></p>
+<p><img alt="American keyboard" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0500.Keyboard%20Row/images/keyboard.png" style="width: 100%; max-width: 600px" /></p>
 
 <p> </p>
 
diff --git a/solution/0500-0599/0500.Keyboard Row/README_EN.md b/solution/0500-0599/0500.Keyboard Row/README_EN.md
index c2d39718646b1..b61f3187025f8 100644
--- a/solution/0500-0599/0500.Keyboard Row/README_EN.md	
+++ b/solution/0500-0599/0500.Keyboard Row/README_EN.md	
@@ -13,7 +13,7 @@
 	<li>the second row consists of the characters <code>&quot;asdfghjkl&quot;</code>, and</li>
 	<li>the third row consists of the characters <code>&quot;zxcvbnm&quot;</code>.</li>
 </ul>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0500.Keyboard%20Row/images/keyboard.png" style="width: 800px; max-width: 600px; height: 267px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0500.Keyboard%20Row/images/keyboard.png" style="width: 800px; max-width: 600px; height: 267px;" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
diff --git a/solution/0500-0599/0501.Find Mode in Binary Search Tree/README.md b/solution/0500-0599/0501.Find Mode in Binary Search Tree/README.md
index 6dd40c0a419e6..a97f1ddfb0ea9 100644
--- a/solution/0500-0599/0501.Find Mode in Binary Search Tree/README.md	
+++ b/solution/0500-0599/0501.Find Mode in Binary Search Tree/README.md	
@@ -21,7 +21,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0501.Find%20Mode%20in%20Binary%20Search%20Tree/images/mode-tree.jpg" style="width: 142px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0501.Find%20Mode%20in%20Binary%20Search%20Tree/images/mode-tree.jpg" style="width: 142px; height: 222px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,2]
 <strong>输出：</strong>[2]
diff --git a/solution/0500-0599/0501.Find Mode in Binary Search Tree/README_EN.md b/solution/0500-0599/0501.Find Mode in Binary Search Tree/README_EN.md
index 9add31fb4afaf..43e1d6a56dccf 100644
--- a/solution/0500-0599/0501.Find Mode in Binary Search Tree/README_EN.md	
+++ b/solution/0500-0599/0501.Find Mode in Binary Search Tree/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0501.Find%20Mode%20in%20Binary%20Search%20Tree/images/mode-tree.jpg" style="width: 142px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0501.Find%20Mode%20in%20Binary%20Search%20Tree/images/mode-tree.jpg" style="width: 142px; height: 222px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,2]
 <strong>Output:</strong> [2]
diff --git a/solution/0500-0599/0505.The Maze II/README.md b/solution/0500-0599/0505.The Maze II/README.md
index d78dcaee9f95b..6651b539bef90 100644
--- a/solution/0500-0599/0505.The Maze II/README.md	
+++ b/solution/0500-0599/0505.The Maze II/README.md	
@@ -31,7 +31,7 @@
 
 <strong>解析:</strong> 一条最短路径 : left -&gt; down -&gt; left -&gt; down -&gt; right -&gt; down -&gt; right。
              总距离为 1 + 1 + 3 + 1 + 2 + 2 + 2 = 12。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze_1_example_1.png" style="width: 100%;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze_1_example_1.png" style="width: 100%;">
 </pre>
 
 <p><strong>示例&nbsp;2:</strong></p>
@@ -50,7 +50,7 @@
 <strong>输出:</strong> -1
 
 <strong>解析:</strong> 没有能够使球停在目的地的路径。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze_1_example_2.png" style="width: 100%;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze_1_example_2.png" style="width: 100%;">
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0500-0599/0505.The Maze II/README_EN.md b/solution/0500-0599/0505.The Maze II/README_EN.md
index 5aaf48d23d06f..7c7ac339ad9da 100644
--- a/solution/0500-0599/0505.The Maze II/README_EN.md	
+++ b/solution/0500-0599/0505.The Maze II/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze1-1-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [4,4]
 <strong>Output:</strong> 12
@@ -23,7 +23,7 @@ The length of the path is 1 + 1 + 3 + 1 + 2 + 2 + 2 = 12.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0505.The%20Maze%20II/images/maze1-2-grid.jpg" style="width: 573px; height: 573px;" />
 <pre>
 <strong>Input:</strong> maze = [[0,0,1,0,0],[0,0,0,0,0],[0,0,0,1,0],[1,1,0,1,1],[0,0,0,0,0]], start = [0,4], destination = [3,2]
 <strong>Output:</strong> -1
diff --git a/solution/0500-0599/0508.Most Frequent Subtree Sum/README.md b/solution/0500-0599/0508.Most Frequent Subtree Sum/README.md
index 503205eb7a8c8..57e7b1d706b43 100644
--- a/solution/0500-0599/0508.Most Frequent Subtree Sum/README.md	
+++ b/solution/0500-0599/0508.Most Frequent Subtree Sum/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq1-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq1-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> root = [5,2,-3]
@@ -23,7 +23,7 @@
 
 <p><strong>示例&nbsp;2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq2-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq2-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> root = [5,2,-5]
diff --git a/solution/0500-0599/0508.Most Frequent Subtree Sum/README_EN.md b/solution/0500-0599/0508.Most Frequent Subtree Sum/README_EN.md
index 09f9fff14fdd3..ebd9ac3827301 100644
--- a/solution/0500-0599/0508.Most Frequent Subtree Sum/README_EN.md	
+++ b/solution/0500-0599/0508.Most Frequent Subtree Sum/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq1-tree.jpg" style="width: 207px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq1-tree.jpg" style="width: 207px; height: 183px;" />
 <pre>
 <strong>Input:</strong> root = [5,2,-3]
 <strong>Output:</strong> [2,-3,4]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq2-tree.jpg" style="width: 207px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0508.Most%20Frequent%20Subtree%20Sum/images/freq2-tree.jpg" style="width: 207px; height: 183px;" />
 <pre>
 <strong>Input:</strong> root = [5,2,-5]
 <strong>Output:</strong> [2]
diff --git a/solution/0500-0599/0510.Inorder Successor in BST II/README.md b/solution/0500-0599/0510.Inorder Successor in BST II/README.md
index 34dd91bb60937..97561e51ff1d9 100644
--- a/solution/0500-0599/0510.Inorder Successor in BST II/README.md	
+++ b/solution/0500-0599/0510.Inorder Successor in BST II/README.md	
@@ -24,7 +24,7 @@ class Node {
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_1.png" style="height: 117px; width: 122px;" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [2,1,3], node = 1
@@ -34,7 +34,7 @@ class Node {
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_2.png" style="height: 229px; width: 246px;" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [5,3,6,2,4,null,null,1], node = 6
@@ -44,7 +44,7 @@ class Node {
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_34.png" style="height: 335px; width: 438px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_34.png" style="height: 335px; width: 438px;" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [15,6,18,3,7,17,20,2,4,null,13,null,null,null,null,null,null,null,null,9], node = 15
@@ -53,7 +53,7 @@ class Node {
 
 <p><strong>示例 4：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_34.png" style="height: 335px; width: 438px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_34.png" style="height: 335px; width: 438px;" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [15,6,18,3,7,17,20,2,4,null,13,null,null,null,null,null,null,null,null,9], node = 13
diff --git a/solution/0500-0599/0510.Inorder Successor in BST II/README_EN.md b/solution/0500-0599/0510.Inorder Successor in BST II/README_EN.md
index 815b35ffb061c..45ef5e100abda 100644
--- a/solution/0500-0599/0510.Inorder Successor in BST II/README_EN.md	
+++ b/solution/0500-0599/0510.Inorder Successor in BST II/README_EN.md	
@@ -21,7 +21,7 @@ class Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_1.png" style="width: 122px; height: 117px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_1.png" style="width: 122px; height: 117px;" />
 <pre>
 <strong>Input:</strong> tree = [2,1,3], node = 1
 <strong>Output:</strong> 2
@@ -29,7 +29,7 @@ class Node {
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_2.png" style="width: 246px; height: 229px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0510.Inorder%20Successor%20in%20BST%20II/images/285_example_2.png" style="width: 246px; height: 229px;" />
 <pre>
 <strong>Input:</strong> tree = [5,3,6,2,4,null,null,1], node = 6
 <strong>Output:</strong> null
diff --git a/solution/0500-0599/0513.Find Bottom Left Tree Value/README.md b/solution/0500-0599/0513.Find Bottom Left Tree Value/README.md
index 891e295fbb789..c34434d57113a 100644
--- a/solution/0500-0599/0513.Find Bottom Left Tree Value/README.md	
+++ b/solution/0500-0599/0513.Find Bottom Left Tree Value/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree1.jpg" style="width: 182px; " /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree1.jpg" style="width: 182px; " /></p>
 
 <pre>
 <strong>输入: </strong>root = [2,1,3]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree2.jpg" style="width: 242px; " /><strong> </strong></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree2.jpg" style="width: 242px; " /><strong> </strong></p>
 
 <pre>
 <strong>输入: </strong>[1,2,3,4,null,5,6,null,null,7]
diff --git a/solution/0500-0599/0513.Find Bottom Left Tree Value/README_EN.md b/solution/0500-0599/0513.Find Bottom Left Tree Value/README_EN.md
index ef1136d2b04bd..56acabf8139a1 100644
--- a/solution/0500-0599/0513.Find Bottom Left Tree Value/README_EN.md	
+++ b/solution/0500-0599/0513.Find Bottom Left Tree Value/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree1.jpg" style="width: 302px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree1.jpg" style="width: 302px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree2.jpg" style="width: 432px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0513.Find%20Bottom%20Left%20Tree%20Value/images/tree2.jpg" style="width: 432px; height: 421px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,null,5,6,null,null,7]
 <strong>Output:</strong> 7
diff --git a/solution/0500-0599/0514.Freedom Trail/README.md b/solution/0500-0599/0514.Freedom Trail/README.md
index c355f08a2b0ab..061bd3b820eb2 100644
--- a/solution/0500-0599/0514.Freedom Trail/README.md	
+++ b/solution/0500-0599/0514.Freedom Trail/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0514.Freedom%20Trail/images/ring.jpg" style="height: 450px; width: 450px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0514.Freedom%20Trail/images/ring.jpg" style="height: 450px; width: 450px;" /></p>
 
 <center>&nbsp;</center>
 
diff --git a/solution/0500-0599/0514.Freedom Trail/README_EN.md b/solution/0500-0599/0514.Freedom Trail/README_EN.md
index ba5752177dd5e..b3044bccf8bc9 100644
--- a/solution/0500-0599/0514.Freedom Trail/README_EN.md	
+++ b/solution/0500-0599/0514.Freedom Trail/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0514.Freedom%20Trail/images/ring.jpg" style="width: 450px; height: 450px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0514.Freedom%20Trail/images/ring.jpg" style="width: 450px; height: 450px;" />
 <pre>
 <strong>Input:</strong> ring = &quot;godding&quot;, key = &quot;gd&quot;
 <strong>Output:</strong> 4
diff --git a/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README.md b/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README.md
index ded8339b018f3..a2610a6440355 100644
--- a/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README.md	
+++ b/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/images/largest_e1.jpg" style="height: 172px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/images/largest_e1.jpg" style="height: 172px; width: 300px;" /></p>
 
 <pre>
 <strong>输入: </strong>root = [1,3,2,5,3,null,9]
diff --git a/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README_EN.md b/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README_EN.md
index e95e2f0dbca3a..6d30649f04ddc 100644
--- a/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README_EN.md	
+++ b/solution/0500-0599/0515.Find Largest Value in Each Tree Row/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/images/largest_e1.jpg" style="width: 300px; height: 172px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/images/largest_e1.jpg" style="width: 300px; height: 172px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,2,5,3,null,9]
 <strong>Output:</strong> [1,3,9]
diff --git a/solution/0500-0599/0529.Minesweeper/README.md b/solution/0500-0599/0529.Minesweeper/README.md
index 7d180e8e86f01..30b5876a0621a 100644
--- a/solution/0500-0599/0529.Minesweeper/README.md
+++ b/solution/0500-0599/0529.Minesweeper/README.md
@@ -32,14 +32,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_1.png" style="width: 500px; max-width: 400px; height: 269px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_1.png" style="width: 500px; max-width: 400px; height: 269px;" />
 <pre>
 <strong>输入：</strong>board = [["E","E","E","E","E"],["E","E","M","E","E"],["E","E","E","E","E"],["E","E","E","E","E"]], click = [3,0]
 <strong>输出：</strong>[["B","1","E","1","B"],["B","1","M","1","B"],["B","1","1","1","B"],["B","B","B","B","B"]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_2.png" style="width: 500px; max-width: 400px; height: 275px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_2.png" style="width: 500px; max-width: 400px; height: 275px;" />
 <pre>
 <strong>输入：</strong>board = [["B","1","E","1","B"],["B","1","M","1","B"],["B","1","1","1","B"],["B","B","B","B","B"]], click = [1,2]
 <strong>输出：</strong>[["B","1","E","1","B"],["B","1","X","1","B"],["B","1","1","1","B"],["B","B","B","B","B"]]
diff --git a/solution/0500-0599/0529.Minesweeper/README_EN.md b/solution/0500-0599/0529.Minesweeper/README_EN.md
index 12aa0e736ec8a..1345ebb0e6407 100644
--- a/solution/0500-0599/0529.Minesweeper/README_EN.md
+++ b/solution/0500-0599/0529.Minesweeper/README_EN.md
@@ -29,14 +29,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_1.png" style="width: 500px; max-width: 400px; height: 269px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_1.png" style="width: 500px; max-width: 400px; height: 269px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;M&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;],[&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;,&quot;E&quot;]], click = [3,0]
 <strong>Output:</strong> [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;M&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_2.png" style="width: 500px; max-width: 400px; height: 275px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0529.Minesweeper/images/minesweeper_example_2.png" style="width: 500px; max-width: 400px; height: 275px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;M&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]], click = [1,2]
 <strong>Output:</strong> [[&quot;B&quot;,&quot;1&quot;,&quot;E&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;X&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;1&quot;,&quot;1&quot;,&quot;1&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]]
diff --git a/solution/0500-0599/0530.Minimum Absolute Difference in BST/README.md b/solution/0500-0599/0530.Minimum Absolute Difference in BST/README.md
index 9797cf091f6fa..e1989cd98b551 100644
--- a/solution/0500-0599/0530.Minimum Absolute Difference in BST/README.md	
+++ b/solution/0500-0599/0530.Minimum Absolute Difference in BST/README.md	
@@ -13,14 +13,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst1.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst1.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [4,2,6,1,3]
 <strong>输出：</strong>1
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst2.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst2.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [1,0,48,null,null,12,49]
 <strong>输出：</strong>1
diff --git a/solution/0500-0599/0530.Minimum Absolute Difference in BST/README_EN.md b/solution/0500-0599/0530.Minimum Absolute Difference in BST/README_EN.md
index 5b6998995e0cc..64468eef4112b 100644
--- a/solution/0500-0599/0530.Minimum Absolute Difference in BST/README_EN.md	
+++ b/solution/0500-0599/0530.Minimum Absolute Difference in BST/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst1.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst1.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,6,1,3]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst2.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0530.Minimum%20Absolute%20Difference%20in%20BST/images/bst2.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [1,0,48,null,null,12,49]
 <strong>Output:</strong> 1
diff --git a/solution/0500-0599/0531.Lonely Pixel I/README.md b/solution/0500-0599/0531.Lonely Pixel I/README.md
index 3efa67486c41e..722b9d062b39d 100644
--- a/solution/0500-0599/0531.Lonely Pixel I/README.md	
+++ b/solution/0500-0599/0531.Lonely Pixel I/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>picture = [["W","W","B"],["W","B","W"],["B","W","W"]]
 <strong>输出：</strong>3
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel2.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel2.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>picture = [["B","B","B"],["B","B","W"],["B","B","B"]]
 <strong>输出：</strong>0
diff --git a/solution/0500-0599/0531.Lonely Pixel I/README_EN.md b/solution/0500-0599/0531.Lonely Pixel I/README_EN.md
index 76feaf9341467..cd6eef0c9ba22 100644
--- a/solution/0500-0599/0531.Lonely Pixel I/README_EN.md	
+++ b/solution/0500-0599/0531.Lonely Pixel I/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> picture = [[&quot;W&quot;,&quot;W&quot;,&quot;B&quot;],[&quot;W&quot;,&quot;B&quot;,&quot;W&quot;],[&quot;B&quot;,&quot;W&quot;,&quot;W&quot;]]
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel2.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0531.Lonely%20Pixel%20I/images/pixel2.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> picture = [[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;W&quot;],[&quot;B&quot;,&quot;B&quot;,&quot;B&quot;]]
 <strong>Output:</strong> 0
diff --git a/solution/0500-0599/0533.Lonely Pixel II/README.md b/solution/0500-0599/0533.Lonely Pixel II/README.md
index 2d0fc107c884e..037ccaf203b85 100644
--- a/solution/0500-0599/0533.Lonely Pixel II/README.md	
+++ b/solution/0500-0599/0533.Lonely Pixel II/README.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-1-grid.jpg" style="width: 493px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-1-grid.jpg" style="width: 493px; height: 333px;" />
 <pre>
 <strong>输入：</strong>picture = [["W","B","W","B","B","W"],["W","B","W","B","B","W"],["W","B","W","B","B","W"],["W","W","B","W","B","W"]], target = 3
 <strong>输出：</strong>6
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>picture = [["W","W","B"],["W","W","B"],["W","W","B"]], target = 1
 <strong>输出：</strong>0
diff --git a/solution/0500-0599/0533.Lonely Pixel II/README_EN.md b/solution/0500-0599/0533.Lonely Pixel II/README_EN.md
index 9e705e04fc630..0865b7ce0545c 100644
--- a/solution/0500-0599/0533.Lonely Pixel II/README_EN.md	
+++ b/solution/0500-0599/0533.Lonely Pixel II/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-1-grid.jpg" style="width: 493px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-1-grid.jpg" style="width: 493px; height: 333px;" />
 <pre>
 <strong>Input:</strong> picture = [[&quot;W&quot;,&quot;B&quot;,&quot;W&quot;,&quot;B&quot;,&quot;B&quot;,&quot;W&quot;],[&quot;W&quot;,&quot;B&quot;,&quot;W&quot;,&quot;B&quot;,&quot;B&quot;,&quot;W&quot;],[&quot;W&quot;,&quot;B&quot;,&quot;W&quot;,&quot;B&quot;,&quot;B&quot;,&quot;W&quot;],[&quot;W&quot;,&quot;W&quot;,&quot;B&quot;,&quot;W&quot;,&quot;B&quot;,&quot;W&quot;]], target = 3
 <strong>Output:</strong> 6
@@ -26,7 +26,7 @@ Take &#39;B&#39; at row r = 0 and column c = 1 as an example:
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0533.Lonely%20Pixel%20II/images/pixel2-2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> picture = [[&quot;W&quot;,&quot;W&quot;,&quot;B&quot;],[&quot;W&quot;,&quot;W&quot;,&quot;B&quot;],[&quot;W&quot;,&quot;W&quot;,&quot;B&quot;]], target = 1
 <strong>Output:</strong> 0
diff --git a/solution/0500-0599/0536.Construct Binary Tree from String/README.md b/solution/0500-0599/0536.Construct Binary Tree from String/README.md
index 6f97d58d9631e..90ca8c17ebb98 100644
--- a/solution/0500-0599/0536.Construct Binary Tree from String/README.md	
+++ b/solution/0500-0599/0536.Construct Binary Tree from String/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0536.Construct%20Binary%20Tree%20from%20String/images/butree.jpg" style="height: 322px; width: 382px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0536.Construct%20Binary%20Tree%20from%20String/images/butree.jpg" style="height: 322px; width: 382px;" />
 <pre>
 <strong>输入：</strong> s = "4(2(3)(1))(6(5))"
 <strong>输出：</strong> [4,2,6,3,1,5]
diff --git a/solution/0500-0599/0536.Construct Binary Tree from String/README_EN.md b/solution/0500-0599/0536.Construct Binary Tree from String/README_EN.md
index 99f7b6a922397..0d66ceb675492 100644
--- a/solution/0500-0599/0536.Construct Binary Tree from String/README_EN.md	
+++ b/solution/0500-0599/0536.Construct Binary Tree from String/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0536.Construct%20Binary%20Tree%20from%20String/images/butree.jpg" style="width: 382px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0536.Construct%20Binary%20Tree%20from%20String/images/butree.jpg" style="width: 382px; height: 322px;" />
 <pre>
 <strong>Input:</strong> s = &quot;4(2(3)(1))(6(5))&quot;
 <strong>Output:</strong> [4,2,6,3,1,5]
diff --git a/solution/0500-0599/0538.Convert BST to Greater Tree/README.md b/solution/0500-0599/0538.Convert BST to Greater Tree/README.md
index 9c123d1797247..a2b27f7dad07d 100644
--- a/solution/0500-0599/0538.Convert BST to Greater Tree/README.md	
+++ b/solution/0500-0599/0538.Convert BST to Greater Tree/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0538.Convert%20BST%20to%20Greater%20Tree/images/tree.png" style="height: 364px; width: 534px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0538.Convert%20BST%20to%20Greater%20Tree/images/tree.png" style="height: 364px; width: 534px;"></strong></p>
 
 <pre><strong>输入：</strong>[4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
 <strong>输出：</strong>[30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
diff --git a/solution/0500-0599/0538.Convert BST to Greater Tree/README_EN.md b/solution/0500-0599/0538.Convert BST to Greater Tree/README_EN.md
index 6c59ad4f77299..93069dee31f71 100644
--- a/solution/0500-0599/0538.Convert BST to Greater Tree/README_EN.md	
+++ b/solution/0500-0599/0538.Convert BST to Greater Tree/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0538.Convert%20BST%20to%20Greater%20Tree/images/tree.png" style="width: 500px; height: 341px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0538.Convert%20BST%20to%20Greater%20Tree/images/tree.png" style="width: 500px; height: 341px;" />
 <pre>
 <strong>Input:</strong> root = [4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
 <strong>Output:</strong> [30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
diff --git a/solution/0500-0599/0542.01 Matrix/README.md b/solution/0500-0599/0542.01 Matrix/README.md
index 20df3a2329815..09f53afa2bb70 100644
--- a/solution/0500-0599/0542.01 Matrix/README.md	
+++ b/solution/0500-0599/0542.01 Matrix/README.md	
@@ -14,7 +14,7 @@
 
 <p><b>示例 1：</b></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/1626667201-NCWmuP-image.png" style="width: 150px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/1626667201-NCWmuP-image.png" style="width: 150px; " /></p>
 
 <pre>
 <strong>输入：</strong>mat =<strong> </strong>[[0,0,0],[0,1,0],[0,0,0]]
@@ -23,7 +23,7 @@
 
 <p><b>示例 2：</b></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/1626667205-xFxIeK-image.png" style="width: 150px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/1626667205-xFxIeK-image.png" style="width: 150px; " /></p>
 
 <pre>
 <b>输入：</b>mat =<b> </b>[[0,0,0],[0,1,0],[1,1,1]]
diff --git a/solution/0500-0599/0542.01 Matrix/README_EN.md b/solution/0500-0599/0542.01 Matrix/README_EN.md
index 23bc49ce9e413..aaa6bfd9367d3 100644
--- a/solution/0500-0599/0542.01 Matrix/README_EN.md	
+++ b/solution/0500-0599/0542.01 Matrix/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/01-1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/01-1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0,0],[0,1,0],[0,0,0]]
 <strong>Output:</strong> [[0,0,0],[0,1,0],[0,0,0]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/01-2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0542.01%20Matrix/images/01-2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0,0],[0,1,0],[1,1,1]]
 <strong>Output:</strong> [[0,0,0],[0,1,0],[1,2,1]]
diff --git a/solution/0500-0599/0543.Diameter of Binary Tree/README_EN.md b/solution/0500-0599/0543.Diameter of Binary Tree/README_EN.md
index 264ad796792ad..f4bf4018ca0ef 100644
--- a/solution/0500-0599/0543.Diameter of Binary Tree/README_EN.md	
+++ b/solution/0500-0599/0543.Diameter of Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0543.Diameter%20of%20Binary%20Tree/images/diamtree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0543.Diameter%20of%20Binary%20Tree/images/diamtree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5]
 <strong>Output:</strong> 3
diff --git a/solution/0500-0599/0545.Boundary of Binary Tree/README.md b/solution/0500-0599/0545.Boundary of Binary Tree/README.md
index 5408a327bdd79..64e1a02546894 100644
--- a/solution/0500-0599/0545.Boundary of Binary Tree/README.md	
+++ b/solution/0500-0599/0545.Boundary of Binary Tree/README.md	
@@ -26,7 +26,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary1.jpg" style="width: 299px; height: 290px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary1.jpg" style="width: 299px; height: 290px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4]
 <strong>输出：</strong>[1,3,4,2]
@@ -37,7 +37,7 @@
 按题目要求依序连接得到结果 [1] + [] + [3,4] + [2] = [1,3,4,2] 。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary2.jpg" style="width: 599px; height: 411px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary2.jpg" style="width: 599px; height: 411px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,6,null,null,null,7,8,9,10]
 <strong>输出：</strong>[1,2,4,7,8,9,10,6,3]
diff --git a/solution/0500-0599/0545.Boundary of Binary Tree/README_EN.md b/solution/0500-0599/0545.Boundary of Binary Tree/README_EN.md
index 45688a33b12e9..bb27d0be9406b 100644
--- a/solution/0500-0599/0545.Boundary of Binary Tree/README_EN.md	
+++ b/solution/0500-0599/0545.Boundary of Binary Tree/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary1.jpg" style="width: 299px; height: 290px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary1.jpg" style="width: 299px; height: 290px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4]
 <strong>Output:</strong> [1,3,4,2]
@@ -36,7 +36,7 @@ Concatenating everything results in [1] + [] + [3,4] + [2] = [1,3,4,2].
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary2.jpg" style="width: 599px; height: 411px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0545.Boundary%20of%20Binary%20Tree/images/boundary2.jpg" style="width: 599px; height: 411px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,null,null,null,7,8,9,10]
 <strong>Output:</strong> [1,2,4,7,8,9,10,6,3]
diff --git a/solution/0500-0599/0547.Number of Provinces/README.md b/solution/0500-0599/0547.Number of Provinces/README.md
index f7eae181ee203..c35fef2261237 100644
--- a/solution/0500-0599/0547.Number of Provinces/README.md	
+++ b/solution/0500-0599/0547.Number of Provinces/README.md	
@@ -19,14 +19,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph1.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph1.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>输入：</strong>isConnected = [[1,1,0],[1,1,0],[0,0,1]]
 <strong>输出：</strong>2
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph2.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph2.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>输入：</strong>isConnected = [[1,0,0],[0,1,0],[0,0,1]]
 <strong>输出：</strong>3
diff --git a/solution/0500-0599/0547.Number of Provinces/README_EN.md b/solution/0500-0599/0547.Number of Provinces/README_EN.md
index a1b5e25c65f2f..951c25914cfbb 100644
--- a/solution/0500-0599/0547.Number of Provinces/README_EN.md	
+++ b/solution/0500-0599/0547.Number of Provinces/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph1.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph1.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>Input:</strong> isConnected = [[1,1,0],[1,1,0],[0,0,1]]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph2.jpg" style="width: 222px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0547.Number%20of%20Provinces/images/graph2.jpg" style="width: 222px; height: 142px;" />
 <pre>
 <strong>Input:</strong> isConnected = [[1,0,0],[0,1,0],[0,0,1]]
 <strong>Output:</strong> 3
diff --git a/solution/0500-0599/0549.Binary Tree Longest Consecutive Sequence II/README_EN.md b/solution/0500-0599/0549.Binary Tree Longest Consecutive Sequence II/README_EN.md
index 63af66f4b4d9a..2acbd75005f3a 100644
--- a/solution/0500-0599/0549.Binary Tree Longest Consecutive Sequence II/README_EN.md	
+++ b/solution/0500-0599/0549.Binary Tree Longest Consecutive Sequence II/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0549.Binary%20Tree%20Longest%20Consecutive%20Sequence%20II/images/consec2-1-tree.jpg" style="width: 207px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0549.Binary%20Tree%20Longest%20Consecutive%20Sequence%20II/images/consec2-1-tree.jpg" style="width: 207px; height: 183px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3]
 <strong>Output:</strong> 2
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0549.Binary%20Tree%20Longest%20Consecutive%20Sequence%20II/images/consec2-2-tree.jpg" style="width: 207px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0549.Binary%20Tree%20Longest%20Consecutive%20Sequence%20II/images/consec2-2-tree.jpg" style="width: 207px; height: 183px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3]
 <strong>Output:</strong> 3
diff --git a/solution/0500-0599/0554.Brick Wall/README.md b/solution/0500-0599/0554.Brick Wall/README.md
index 19181889659cd..ce93ccf142b95 100644
--- a/solution/0500-0599/0554.Brick Wall/README.md	
+++ b/solution/0500-0599/0554.Brick Wall/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0554.Brick%20Wall/images/cutwall-grid.jpg" style="width: 493px; height: 577px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0554.Brick%20Wall/images/cutwall-grid.jpg" style="width: 493px; height: 577px;" />
 <pre>
 <strong>输入：</strong>wall = [[1,2,2,1],[3,1,2],[1,3,2],[2,4],[3,1,2],[1,3,1,1]]
 <strong>输出：</strong>2
diff --git a/solution/0500-0599/0554.Brick Wall/README_EN.md b/solution/0500-0599/0554.Brick Wall/README_EN.md
index 061f603f58938..6b9a865653388 100644
--- a/solution/0500-0599/0554.Brick Wall/README_EN.md	
+++ b/solution/0500-0599/0554.Brick Wall/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0554.Brick%20Wall/images/cutwall-grid.jpg" style="width: 493px; height: 577px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0554.Brick%20Wall/images/cutwall-grid.jpg" style="width: 493px; height: 577px;" />
 <pre>
 <strong>Input:</strong> wall = [[1,2,2,1],[3,1,2],[1,3,2],[2,4],[3,1,2],[1,3,1,1]]
 <strong>Output:</strong> 2
diff --git a/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README.md b/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README.md
index 32e1ddcfa7dcd..b8f10389b6ad6 100644
--- a/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README.md	
+++ b/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README.md	
@@ -39,7 +39,7 @@ class Node {
 	<li>使用适当的子网格递归每个子节点。</li>
 </ol>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/new_top.png" style="height: 181px; width: 777px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/new_top.png" style="height: 181px; width: 777px;" /></p>
 
 <p>如果你想了解更多关于四叉树的内容，可以参考 <a href="https://en.wikipedia.org/wiki/Quadtree">wiki</a> 。</p>
 
@@ -55,7 +55,7 @@ class Node {
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt1.png" style="height: 196px; width: 550px;" /> <img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt2.png" style="height: 278px; width: 550px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt1.png" style="height: 196px; width: 550px;" /> <img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt2.png" style="height: 278px; width: 550px;" /></p>
 
 <pre>
 <strong>输入：</strong>quadTree1 = [[0,1],[1,1],[1,1],[1,0],[1,0]]
@@ -64,7 +64,7 @@ class Node {
 <strong>解释：</strong>quadTree1 和 quadTree2 如上所示。由四叉树所表示的二进制矩阵也已经给出。
 如果我们对这两个矩阵进行按位逻辑或运算，则可以得到下面的二进制矩阵，由一个作为结果的四叉树表示。
 注意，我们展示的二进制矩阵仅仅是为了更好地说明题意，你无需构造二进制矩阵来获得结果四叉树。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qtr.png" style="height: 222px; width: 777px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qtr.png" style="height: 222px; width: 777px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README_EN.md b/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README_EN.md
index bc3329626ee5f..484ac7384ded3 100644
--- a/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README_EN.md	
+++ b/solution/0500-0599/0558.Logical OR of Two Binary Grids Represented as Quad-Trees/README_EN.md	
@@ -36,7 +36,7 @@ class Node {
 	<li>If the current grid has different values, set <code>isLeaf</code> to False and set <code>val</code> to any value and divide the current grid into four sub-grids as shown in the photo.</li>
 	<li>Recurse for each of the children with the proper sub-grid.</li>
 </ol>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/new_top.png" style="width: 777px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/new_top.png" style="width: 777px; height: 181px;" />
 <p>If you want to know more about the Quad-Tree, you can refer to the <a href="https://en.wikipedia.org/wiki/Quadtree">wiki</a>.</p>
 
 <p><strong>Quad-Tree format:</strong></p>
@@ -49,7 +49,7 @@ class Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt1.png" style="width: 550px; height: 196px;" /> <img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt2.png" style="width: 550px; height: 278px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt1.png" style="width: 550px; height: 196px;" /> <img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qt2.png" style="width: 550px; height: 278px;" />
 <pre>
 <strong>Input:</strong> quadTree1 = [[0,1],[1,1],[1,1],[1,0],[1,0]]
 , quadTree2 = [[0,1],[1,1],[0,1],[1,1],[1,0],null,null,null,null,[1,0],[1,0],[1,1],[1,1]]
@@ -57,7 +57,7 @@ class Node {
 <strong>Explanation:</strong> quadTree1 and quadTree2 are shown above. You can see the binary matrix which is represented by each Quad-Tree.
 If we apply logical bitwise OR on the two binary matrices we get the binary matrix below which is represented by the result Quad-Tree.
 Notice that the binary matrices shown are only for illustration, you don&#39;t have to construct the binary matrix to get the result tree.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qtr.png" style="width: 777px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0558.Logical%20OR%20of%20Two%20Binary%20Grids%20Represented%20as%20Quad-Trees/images/qtr.png" style="width: 777px; height: 222px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README.md b/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README.md
index ff22051a4dcdf..c7a3150ca2187 100644
--- a/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README.md	
+++ b/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README_EN.md b/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README_EN.md
index 4adcbd8aa3829..fc3423169af5a 100644
--- a/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README_EN.md	
+++ b/solution/0500-0599/0559.Maximum Depth of N-ary Tree/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
@@ -22,7 +22,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0559.Maximum%20Depth%20of%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README.md b/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README.md
index f0b019cd28831..34e8d853cde1d 100644
--- a/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README.md	
+++ b/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long1-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong>&nbsp;mat = [[0,1,1,0],[0,1,1,0],[0,0,0,1]]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long2-grid.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long2-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> mat = [[1,1,1,1],[0,1,1,0],[0,0,0,1]]
diff --git a/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README_EN.md b/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README_EN.md
index 3e66e14a2806d..43291f6f9005a 100644
--- a/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README_EN.md	
+++ b/solution/0500-0599/0562.Longest Line of Consecutive One in Matrix/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long1-grid.jpg" style="width: 333px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long1-grid.jpg" style="width: 333px; height: 253px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,1,1,0],[0,1,1,0],[0,0,0,1]]
 <strong>Output:</strong> 3
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long2-grid.jpg" style="width: 333px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0562.Longest%20Line%20of%20Consecutive%20One%20in%20Matrix/images/long2-grid.jpg" style="width: 333px; height: 253px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,1,1,1],[0,1,1,0],[0,0,0,1]]
 <strong>Output:</strong> 4
diff --git a/solution/0500-0599/0563.Binary Tree Tilt/README.md b/solution/0500-0599/0563.Binary Tree Tilt/README.md
index 2ceeea15c5c24..c41b8fe5ed629 100644
--- a/solution/0500-0599/0563.Binary Tree Tilt/README.md	
+++ b/solution/0500-0599/0563.Binary Tree Tilt/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt1.jpg" style="width: 712px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt1.jpg" style="width: 712px; height: 182px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3]
 <strong>输出：</strong>1
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt2.jpg" style="width: 800px; height: 203px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt2.jpg" style="width: 800px; height: 203px;" />
 <pre>
 <strong>输入：</strong>root = [4,2,9,3,5,null,7]
 <strong>输出：</strong>15
@@ -42,7 +42,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt3.jpg" style="width: 800px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt3.jpg" style="width: 800px; height: 293px;" />
 <pre>
 <strong>输入：</strong>root = [21,7,14,1,1,2,2,3,3]
 <strong>输出：</strong>9
diff --git a/solution/0500-0599/0563.Binary Tree Tilt/README_EN.md b/solution/0500-0599/0563.Binary Tree Tilt/README_EN.md
index ec55df04a1e6b..2d48508caf69d 100644
--- a/solution/0500-0599/0563.Binary Tree Tilt/README_EN.md	
+++ b/solution/0500-0599/0563.Binary Tree Tilt/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt1.jpg" style="width: 712px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt1.jpg" style="width: 712px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3]
 <strong>Output:</strong> 1
@@ -22,7 +22,7 @@ Sum of every tilt : 0 + 0 + 1 = 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt2.jpg" style="width: 800px; height: 203px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt2.jpg" style="width: 800px; height: 203px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,9,3,5,null,7]
 <strong>Output:</strong> 15
@@ -37,7 +37,7 @@ Sum of every tilt : 0 + 0 + 0 + 2 + 7 + 6 = 15
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt3.jpg" style="width: 800px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0563.Binary%20Tree%20Tilt/images/tilt3.jpg" style="width: 800px; height: 293px;" />
 <pre>
 <strong>Input:</strong> root = [21,7,14,1,1,2,2,3,3]
 <strong>Output:</strong> 9
diff --git a/solution/0500-0599/0566.Reshape the Matrix/README.md b/solution/0500-0599/0566.Reshape the Matrix/README.md
index f259314033ca2..f50cd113ffbd5 100644
--- a/solution/0500-0599/0566.Reshape the Matrix/README.md	
+++ b/solution/0500-0599/0566.Reshape the Matrix/README.md	
@@ -17,14 +17,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape1-grid.jpg" style="width: 613px; height: 173px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape1-grid.jpg" style="width: 613px; height: 173px;" />
 <pre>
 <strong>输入：</strong>mat = [[1,2],[3,4]], r = 1, c = 4
 <strong>输出：</strong>[[1,2,3,4]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape2-grid.jpg" style="width: 453px; height: 173px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape2-grid.jpg" style="width: 453px; height: 173px;" />
 <pre>
 <strong>输入：</strong>mat = [[1,2],[3,4]], r = 2, c = 4
 <strong>输出：</strong>[[1,2],[3,4]]
diff --git a/solution/0500-0599/0566.Reshape the Matrix/README_EN.md b/solution/0500-0599/0566.Reshape the Matrix/README_EN.md
index 9a39a5193ab62..feb1e6448bdc8 100644
--- a/solution/0500-0599/0566.Reshape the Matrix/README_EN.md	
+++ b/solution/0500-0599/0566.Reshape the Matrix/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape1-grid.jpg" style="width: 613px; height: 173px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape1-grid.jpg" style="width: 613px; height: 173px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,2],[3,4]], r = 1, c = 4
 <strong>Output:</strong> [[1,2,3,4]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape2-grid.jpg" style="width: 453px; height: 173px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0566.Reshape%20the%20Matrix/images/reshape2-grid.jpg" style="width: 453px; height: 173px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,2],[3,4]], r = 2, c = 4
 <strong>Output:</strong> [[1,2],[3,4]]
diff --git a/solution/0500-0599/0572.Subtree of Another Tree/README.md b/solution/0500-0599/0572.Subtree of Another Tree/README.md
index b4b35044cdfa0..9f979862156ab 100644
--- a/solution/0500-0599/0572.Subtree of Another Tree/README.md	
+++ b/solution/0500-0599/0572.Subtree of Another Tree/README.md	
@@ -15,14 +15,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree1-tree.jpg" style="width: 532px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree1-tree.jpg" style="width: 532px; height: 400px;" />
 <pre>
 <strong>输入：</strong>root = [3,4,5,1,2], subRoot = [4,1,2]
 <strong>输出：</strong>true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree2-tree.jpg" style="width: 502px; height: 458px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree2-tree.jpg" style="width: 502px; height: 458px;" />
 <pre>
 <strong>输入：</strong>root = [3,4,5,1,2,null,null,null,null,0], subRoot = [4,1,2]
 <strong>输出：</strong>false
diff --git a/solution/0500-0599/0572.Subtree of Another Tree/README_EN.md b/solution/0500-0599/0572.Subtree of Another Tree/README_EN.md
index 1d1bb0c206f3c..802a47463eca7 100644
--- a/solution/0500-0599/0572.Subtree of Another Tree/README_EN.md	
+++ b/solution/0500-0599/0572.Subtree of Another Tree/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree1-tree.jpg" style="width: 532px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree1-tree.jpg" style="width: 532px; height: 400px;" />
 <pre>
 <strong>Input:</strong> root = [3,4,5,1,2], subRoot = [4,1,2]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree2-tree.jpg" style="width: 502px; height: 458px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0572.Subtree%20of%20Another%20Tree/images/subtree2-tree.jpg" style="width: 502px; height: 458px;" />
 <pre>
 <strong>Input:</strong> root = [3,4,5,1,2,null,null,null,null,0], subRoot = [4,1,2]
 <strong>Output:</strong> false
diff --git a/solution/0500-0599/0573.Squirrel Simulation/README.md b/solution/0500-0599/0573.Squirrel Simulation/README.md
index 9b787defb2117..1ddcc391c0667 100644
--- a/solution/0500-0599/0573.Squirrel Simulation/README.md	
+++ b/solution/0500-0599/0573.Squirrel Simulation/README.md	
@@ -18,7 +18,7 @@
 坚果 : [[3,0], [2,5]]
 <strong>输出:</strong> 12
 <strong>解释:</strong>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel_simulation.png" style="width: 40%;">​​​​​
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel_simulation.png" style="width: 40%;">​​​​​
 </pre>
 
 <p><strong>注意:</strong></p>
diff --git a/solution/0500-0599/0573.Squirrel Simulation/README_EN.md b/solution/0500-0599/0573.Squirrel Simulation/README_EN.md
index 5125c2584a6ce..ab72f9aba8bf0 100644
--- a/solution/0500-0599/0573.Squirrel Simulation/README_EN.md	
+++ b/solution/0500-0599/0573.Squirrel Simulation/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel1-grid.jpg" style="width: 573px; height: 413px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel1-grid.jpg" style="width: 573px; height: 413px;" />
 <pre>
 <strong>Input:</strong> height = 5, width = 7, tree = [2,2], squirrel = [4,4], nuts = [[3,0], [2,5]]
 <strong>Output:</strong> 12
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel2-grid.jpg" style="width: 253px; height: 93px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0573.Squirrel%20Simulation/images/squirrel2-grid.jpg" style="width: 253px; height: 93px;" />
 <pre>
 <strong>Input:</strong> height = 1, width = 3, tree = [0,1], squirrel = [0,0], nuts = [[0,2]]
 <strong>Output:</strong> 3
diff --git a/solution/0500-0599/0576.Out of Boundary Paths/README.md b/solution/0500-0599/0576.Out of Boundary Paths/README.md
index 6ceb2257c2fd7..d9e090d41127b 100644
--- a/solution/0500-0599/0576.Out of Boundary Paths/README.md	
+++ b/solution/0500-0599/0576.Out of Boundary Paths/README.md	
@@ -13,14 +13,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_1.png" style="width: 500px; height: 296px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_1.png" style="width: 500px; height: 296px;" />
 <pre>
 <strong>输入：</strong>m = 2, n = 2, maxMove = 2, startRow = 0, startColumn = 0
 <strong>输出：</strong>6
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_2.png" style="width: 500px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_2.png" style="width: 500px; height: 293px;" />
 <pre>
 <strong>输入：</strong>m = 1, n = 3, maxMove = 3, startRow = 0, startColumn = 1
 <strong>输出：</strong>12
diff --git a/solution/0500-0599/0576.Out of Boundary Paths/README_EN.md b/solution/0500-0599/0576.Out of Boundary Paths/README_EN.md
index 1753d734d976d..eedb9c6bc1f6a 100644
--- a/solution/0500-0599/0576.Out of Boundary Paths/README_EN.md	
+++ b/solution/0500-0599/0576.Out of Boundary Paths/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_1.png" style="width: 500px; height: 296px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_1.png" style="width: 500px; height: 296px;" />
 <pre>
 <strong>Input:</strong> m = 2, n = 2, maxMove = 2, startRow = 0, startColumn = 0
 <strong>Output:</strong> 6
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_2.png" style="width: 500px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0576.Out%20of%20Boundary%20Paths/images/out_of_boundary_paths_2.png" style="width: 500px; height: 293px;" />
 <pre>
 <strong>Input:</strong> m = 1, n = 3, maxMove = 3, startRow = 0, startColumn = 1
 <strong>Output:</strong> 12
diff --git a/solution/0500-0599/0582.Kill Process/README.md b/solution/0500-0599/0582.Kill Process/README.md
index 805a60e042e5d..36ea236438ec3 100644
--- a/solution/0500-0599/0582.Kill Process/README.md	
+++ b/solution/0500-0599/0582.Kill Process/README.md	
@@ -16,7 +16,7 @@
  
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0582.Kill%20Process/images/ptree.jpg" style="width: 207px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0582.Kill%20Process/images/ptree.jpg" style="width: 207px; height: 302px;" />
 <pre>
 <strong>输入：</strong>pid = [1,3,10,5], ppid = [3,0,5,3], kill = 5
 <strong>输出：</strong>[5,10]
diff --git a/solution/0500-0599/0582.Kill Process/README_EN.md b/solution/0500-0599/0582.Kill Process/README_EN.md
index 39578c1630d98..3e5fa72371224 100644
--- a/solution/0500-0599/0582.Kill Process/README_EN.md	
+++ b/solution/0500-0599/0582.Kill Process/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0582.Kill%20Process/images/ptree.jpg" style="width: 207px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0582.Kill%20Process/images/ptree.jpg" style="width: 207px; height: 302px;" />
 <pre>
 <strong>Input:</strong> pid = [1,3,10,5], ppid = [3,0,5,3], kill = 5
 <strong>Output:</strong> [5,10]
diff --git a/solution/0500-0599/0587.Erect the Fence/README.md b/solution/0500-0599/0587.Erect the Fence/README.md
index 213cddfd1d010..f85b639a3a489 100644
--- a/solution/0500-0599/0587.Erect the Fence/README.md	
+++ b/solution/0500-0599/0587.Erect the Fence/README.md	
@@ -18,7 +18,7 @@
 
 <strong>解释:</strong>
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect_the_fence_1.png" style="width: 100%; max-width: 320px">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect_the_fence_1.png" style="width: 100%; max-width: 320px">
 
 </pre>
 
@@ -30,7 +30,7 @@
 
 <strong>解释:</strong>
 
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect_the_fence_2.png" style="width: 100%; max-width: 320px">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect_the_fence_2.png" style="width: 100%; max-width: 320px">
 
 即使树都在一条直线上，你也需要先用绳子包围它们。
 
diff --git a/solution/0500-0599/0587.Erect the Fence/README_EN.md b/solution/0500-0599/0587.Erect the Fence/README_EN.md
index 28cb9be54633d..040f6ee51b8bb 100644
--- a/solution/0500-0599/0587.Erect the Fence/README_EN.md	
+++ b/solution/0500-0599/0587.Erect the Fence/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect2-plane.jpg" style="width: 509px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect2-plane.jpg" style="width: 509px; height: 500px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[2,2],[2,0],[2,4],[3,3],[4,2]]
 <strong>Output:</strong> [[1,1],[2,0],[3,3],[2,4],[4,2]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect1-plane.jpg" style="width: 509px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0587.Erect%20the%20Fence/images/erect1-plane.jpg" style="width: 509px; height: 500px;" />
 <pre>
 <strong>Input:</strong> points = [[1,2],[2,2],[4,2]]
 <strong>Output:</strong> [[4,2],[2,2],[1,2]]
diff --git a/solution/0500-0599/0588.Design In-Memory File System/README.md b/solution/0500-0599/0588.Design In-Memory File System/README.md
index a0ca75d1b5273..ced3a4e6c5b78 100644
--- a/solution/0500-0599/0588.Design In-Memory File System/README.md	
+++ b/solution/0500-0599/0588.Design In-Memory File System/README.md	
@@ -37,7 +37,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0588.Design%20In-Memory%20File%20System/images/filesystem.png" style="height: 315px; width: 650px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0588.Design%20In-Memory%20File%20System/images/filesystem.png" style="height: 315px; width: 650px;" /></p>
 
 <pre>
 <strong>输入:</strong> 
diff --git a/solution/0500-0599/0588.Design In-Memory File System/README_EN.md b/solution/0500-0599/0588.Design In-Memory File System/README_EN.md
index cafc61421b073..0d7be622d42b9 100644
--- a/solution/0500-0599/0588.Design In-Memory File System/README_EN.md	
+++ b/solution/0500-0599/0588.Design In-Memory File System/README_EN.md	
@@ -28,7 +28,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0588.Design%20In-Memory%20File%20System/images/filesystem.png" style="width: 650px; height: 315px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0588.Design%20In-Memory%20File%20System/images/filesystem.png" style="width: 650px; height: 315px;" />
 <pre>
 <strong>Input</strong>
 [&quot;FileSystem&quot;, &quot;ls&quot;, &quot;mkdir&quot;, &quot;addContentToFile&quot;, &quot;ls&quot;, &quot;readContentFromFile&quot;]
diff --git a/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README.md b/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README.md
index 07564ad104b5e..7705020c45a7d 100644
--- a/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README.md	
+++ b/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README.md	
@@ -13,7 +13,7 @@
 <p><br />
 <strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/narytreeexample.png" style="height: 193px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/narytreeexample.png" style="height: 193px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/sample_4_964.png" style="height: 272px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/sample_4_964.png" style="height: 272px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README_EN.md b/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README_EN.md
index 92937c94986a6..7c65a69dde0cd 100644
--- a/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README_EN.md	
+++ b/solution/0500-0599/0589.N-ary Tree Preorder Traversal/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
@@ -20,7 +20,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0589.N-ary%20Tree%20Preorder%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README.md b/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README.md
index 6fbc8cf1f089f..58a49a7041f52 100644
--- a/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README.md	
+++ b/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/narytreeexample.png" style="height: 193px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/narytreeexample.png" style="height: 193px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/sample_4_964.png" style="height: 269px; width: 296px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/sample_4_964.png" style="height: 269px; width: 296px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README_EN.md b/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README_EN.md
index 7ad486e309a09..8b552170a9038 100644
--- a/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README_EN.md	
+++ b/solution/0500-0599/0590.N-ary Tree Postorder Traversal/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/narytreeexample.png" style="width: 100%; max-width: 300px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
 <strong>Output:</strong> [5,6,3,2,4,1]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0590.N-ary%20Tree%20Postorder%20Traversal/images/sample_4_964.png" style="width: 296px; height: 241px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
 <strong>Output:</strong> [2,6,14,11,7,3,12,8,4,13,9,10,5,1]
diff --git a/solution/0500-0599/0598.Range Addition II/README.md b/solution/0500-0599/0598.Range Addition II/README.md
index d33173ad422a4..a6e204f95f992 100644
--- a/solution/0500-0599/0598.Range Addition II/README.md	
+++ b/solution/0500-0599/0598.Range Addition II/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0598.Range%20Addition%20II/images/ex1.jpg" style="height: 176px; width: 750px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0598.Range%20Addition%20II/images/ex1.jpg" style="height: 176px; width: 750px;" /></p>
 
 <pre>
 <strong>输入:</strong> m = 3, n = 3，ops = [[2,2],[3,3]]
diff --git a/solution/0500-0599/0598.Range Addition II/README_EN.md b/solution/0500-0599/0598.Range Addition II/README_EN.md
index 2e191baa5770f..948ff598b8879 100644
--- a/solution/0500-0599/0598.Range Addition II/README_EN.md	
+++ b/solution/0500-0599/0598.Range Addition II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0598.Range%20Addition%20II/images/ex1.jpg" style="width: 750px; height: 176px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0500-0599/0598.Range%20Addition%20II/images/ex1.jpg" style="width: 750px; height: 176px;" />
 <pre>
 <strong>Input:</strong> m = 3, n = 3, ops = [[2,2],[3,3]]
 <strong>Output:</strong> 4
diff --git a/solution/0600-0699/0606.Construct String from Binary Tree/README.md b/solution/0600-0699/0606.Construct String from Binary Tree/README.md
index 6d1318df00a8d..1771184171d05 100644
--- a/solution/0600-0699/0606.Construct String from Binary Tree/README.md	
+++ b/solution/0600-0699/0606.Construct String from Binary Tree/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons1-tree.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons1-tree.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4]
 <strong>输出：</strong>"1(2(4))(3)"
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons2-tree.jpg" style="width: 207px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons2-tree.jpg" style="width: 207px; height: 293px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,4]
 <strong>输出：</strong>"1(2()(4))(3)"
diff --git a/solution/0600-0699/0606.Construct String from Binary Tree/README_EN.md b/solution/0600-0699/0606.Construct String from Binary Tree/README_EN.md
index fa35313c7ce15..6798c6312d412 100644
--- a/solution/0600-0699/0606.Construct String from Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0606.Construct String from Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons1-tree.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons1-tree.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4]
 <strong>Output:</strong> &quot;1(2(4))(3)&quot;
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons2-tree.jpg" style="width: 207px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0606.Construct%20String%20from%20Binary%20Tree/images/cons2-tree.jpg" style="width: 207px; height: 293px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4]
 <strong>Output:</strong> &quot;1(2()(4))(3)&quot;
diff --git a/solution/0600-0699/0608.Tree Node/README_EN.md b/solution/0600-0699/0608.Tree Node/README_EN.md
index bcc1d96822e4a..823eba1112f6e 100644
--- a/solution/0600-0699/0608.Tree Node/README_EN.md	
+++ b/solution/0600-0699/0608.Tree Node/README_EN.md	
@@ -36,7 +36,7 @@ The given structure is always a valid tree.
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0608.Tree%20Node/images/tree1.jpg" style="width: 304px; height: 224px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0608.Tree%20Node/images/tree1.jpg" style="width: 304px; height: 224px;" />
 <pre>
 <strong>Input:</strong> 
 Tree table:
@@ -66,7 +66,7 @@ Nodes 3, 4, and 5 are leaf nodes because they have parent nodes and they do not
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0608.Tree%20Node/images/tree2.jpg" style="width: 64px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0608.Tree%20Node/images/tree2.jpg" style="width: 64px; height: 65px;" />
 <pre>
 <strong>Input:</strong> 
 Tree table:
diff --git a/solution/0600-0699/0617.Merge Two Binary Trees/README.md b/solution/0600-0699/0617.Merge Two Binary Trees/README.md
index 418a6730667e2..3f6e7a93de4f2 100644
--- a/solution/0600-0699/0617.Merge Two Binary Trees/README.md	
+++ b/solution/0600-0699/0617.Merge Two Binary Trees/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0617.Merge%20Two%20Binary%20Trees/images/merge.jpg" style="height: 163px; width: 600px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0617.Merge%20Two%20Binary%20Trees/images/merge.jpg" style="height: 163px; width: 600px;" />
 <pre>
 <strong>输入：</strong>root1 = [1,3,2,5], root2 = [2,1,3,null,4,null,7]
 <strong>输出：</strong>[3,4,5,5,4,null,7]
diff --git a/solution/0600-0699/0617.Merge Two Binary Trees/README_EN.md b/solution/0600-0699/0617.Merge Two Binary Trees/README_EN.md
index 060b7a5427e16..44a827ef2b933 100644
--- a/solution/0600-0699/0617.Merge Two Binary Trees/README_EN.md	
+++ b/solution/0600-0699/0617.Merge Two Binary Trees/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0617.Merge%20Two%20Binary%20Trees/images/merge.jpg" style="width: 600px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0617.Merge%20Two%20Binary%20Trees/images/merge.jpg" style="width: 600px; height: 163px;" />
 <pre>
 <strong>Input:</strong> root1 = [1,3,2,5], root2 = [2,1,3,null,4,null,7]
 <strong>Output:</strong> [3,4,5,5,4,null,7]
diff --git a/solution/0600-0699/0623.Add One Row to Tree/README.md b/solution/0600-0699/0623.Add One Row to Tree/README.md
index e6789a2bf31c8..6c9e8876d5ed9 100644
--- a/solution/0600-0699/0623.Add One Row to Tree/README.md	
+++ b/solution/0600-0699/0623.Add One Row to Tree/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/addrow-tree.jpg" style="height: 231px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/addrow-tree.jpg" style="height: 231px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [4,2,6,3,1,5], val = 1, depth = 2
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/add2-tree.jpg" style="height: 277px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/add2-tree.jpg" style="height: 277px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [4,2,null,3,1], val = 1, depth = 3
diff --git a/solution/0600-0699/0623.Add One Row to Tree/README_EN.md b/solution/0600-0699/0623.Add One Row to Tree/README_EN.md
index b10fbf2fd2b52..dc339a62f1ffd 100644
--- a/solution/0600-0699/0623.Add One Row to Tree/README_EN.md	
+++ b/solution/0600-0699/0623.Add One Row to Tree/README_EN.md	
@@ -19,14 +19,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/addrow-tree.jpg" style="width: 500px; height: 231px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/addrow-tree.jpg" style="width: 500px; height: 231px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,6,3,1,5], val = 1, depth = 2
 <strong>Output:</strong> [4,1,1,2,null,null,6,3,1,5]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/add2-tree.jpg" style="width: 500px; height: 277px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0623.Add%20One%20Row%20to%20Tree/images/add2-tree.jpg" style="width: 500px; height: 277px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,null,3,1], val = 1, depth = 3
 <strong>Output:</strong> [4,2,null,1,1,3,null,null,1]
diff --git a/solution/0600-0699/0633.Sum of Square Numbers/README.md b/solution/0600-0699/0633.Sum of Square Numbers/README.md
index e109d7fe0aba5..9aa58bb134459 100644
--- a/solution/0600-0699/0633.Sum of Square Numbers/README.md	
+++ b/solution/0600-0699/0633.Sum of Square Numbers/README.md	
@@ -37,7 +37,7 @@
 
 <!-- 这里可写通用的实现逻辑 -->
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0633.Sum%20of%20Square%20Numbers/images/table.png)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0633.Sum%20of%20Square%20Numbers/images/table.png)
 
 上图为 a，b，c 之间的关系，这题其实就是在这张“表”里查找 c。
 
diff --git a/solution/0600-0699/0633.Sum of Square Numbers/README_EN.md b/solution/0600-0699/0633.Sum of Square Numbers/README_EN.md
index 12bc935101e20..90b55cb7c8e6d 100644
--- a/solution/0600-0699/0633.Sum of Square Numbers/README_EN.md	
+++ b/solution/0600-0699/0633.Sum of Square Numbers/README_EN.md	
@@ -31,7 +31,7 @@
 
 ## Solutions
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0633.Sum%20of%20Square%20Numbers/images/table.png)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0633.Sum%20of%20Square%20Numbers/images/table.png)
 
 The picture above shows the relationship between `a`, `b`, and `c`. This question is actually looking up `c` in this table
 
diff --git a/solution/0600-0699/0636.Exclusive Time of Functions/README.md b/solution/0600-0699/0636.Exclusive Time of Functions/README.md
index e40aae3654cd6..b00d34f827570 100644
--- a/solution/0600-0699/0636.Exclusive Time of Functions/README.md	
+++ b/solution/0600-0699/0636.Exclusive Time of Functions/README.md	
@@ -18,7 +18,7 @@
  
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0636.Exclusive%20Time%20of%20Functions/images/diag1b.png" style="width: 550px; height: 239px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0636.Exclusive%20Time%20of%20Functions/images/diag1b.png" style="width: 550px; height: 239px;" />
 <pre>
 <strong>输入：</strong>n = 2, logs = ["0:start:0","1:start:2","1:end:5","0:end:6"]
 <strong>输出：</strong>[3,4]
diff --git a/solution/0600-0699/0636.Exclusive Time of Functions/README_EN.md b/solution/0600-0699/0636.Exclusive Time of Functions/README_EN.md
index 89006049ce3aa..3e23a4f867365 100644
--- a/solution/0600-0699/0636.Exclusive Time of Functions/README_EN.md	
+++ b/solution/0600-0699/0636.Exclusive Time of Functions/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0636.Exclusive%20Time%20of%20Functions/images/diag1b.png" style="width: 550px; height: 239px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0636.Exclusive%20Time%20of%20Functions/images/diag1b.png" style="width: 550px; height: 239px;" />
 <pre>
 <strong>Input:</strong> n = 2, logs = [&quot;0:start:0&quot;,&quot;1:start:2&quot;,&quot;1:end:5&quot;,&quot;0:end:6&quot;]
 <strong>Output:</strong> [3,4]
diff --git a/solution/0600-0699/0637.Average of Levels in Binary Tree/README.md b/solution/0600-0699/0637.Average of Levels in Binary Tree/README.md
index 77f2e86bd4f6c..7fa9c0589064b 100644
--- a/solution/0600-0699/0637.Average of Levels in Binary Tree/README.md	
+++ b/solution/0600-0699/0637.Average of Levels in Binary Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg1-tree.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg1-tree.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg2-tree.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg2-tree.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [3,9,20,15,7]
diff --git a/solution/0600-0699/0637.Average of Levels in Binary Tree/README_EN.md b/solution/0600-0699/0637.Average of Levels in Binary Tree/README_EN.md
index c8eec01accf78..287c73169a6cf 100644
--- a/solution/0600-0699/0637.Average of Levels in Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0637.Average of Levels in Binary Tree/README_EN.md	
@@ -8,7 +8,7 @@ Given the <code>root</code> of a binary tree, return <em>the average value of th
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg1-tree.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg1-tree.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [3.00000,14.50000,11.00000]
@@ -17,7 +17,7 @@ Hence return [3, 14.5, 11].
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg2-tree.jpg" style="width: 292px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0637.Average%20of%20Levels%20in%20Binary%20Tree/images/avg2-tree.jpg" style="width: 292px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,15,7]
 <strong>Output:</strong> [3.00000,14.50000,11.00000]
diff --git a/solution/0600-0699/0652.Find Duplicate Subtrees/README.md b/solution/0600-0699/0652.Find Duplicate Subtrees/README.md
index 3b47480d3591c..f68ff5a6ceb46 100644
--- a/solution/0600-0699/0652.Find Duplicate Subtrees/README.md	
+++ b/solution/0600-0699/0652.Find Duplicate Subtrees/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e1.jpg" style="height: 236px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e1.jpg" style="height: 236px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,null,2,4,null,null,4]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e2.jpg" style="height: 125px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e2.jpg" style="height: 125px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,1,1]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e33.jpg" style="height: 202px; width: 300px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e33.jpg" style="height: 202px; width: 300px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [2,2,2,3,null,3,null]
diff --git a/solution/0600-0699/0652.Find Duplicate Subtrees/README_EN.md b/solution/0600-0699/0652.Find Duplicate Subtrees/README_EN.md
index febc60ff8fa8d..12a6a3f0fd77e 100644
--- a/solution/0600-0699/0652.Find Duplicate Subtrees/README_EN.md	
+++ b/solution/0600-0699/0652.Find Duplicate Subtrees/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e1.jpg" style="width: 450px; height: 354px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e1.jpg" style="width: 450px; height: 354px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,null,2,4,null,null,4]
 <strong>Output:</strong> [[2,4],[4]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e2.jpg" style="width: 321px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e2.jpg" style="width: 321px; height: 201px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,1]
 <strong>Output:</strong> [[1]]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e33.jpg" style="width: 450px; height: 303px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0652.Find%20Duplicate%20Subtrees/images/e33.jpg" style="width: 450px; height: 303px;" />
 <pre>
 <strong>Input:</strong> root = [2,2,2,3,null,3,null]
 <strong>Output:</strong> [[2,3],[3]]
diff --git a/solution/0600-0699/0653.Two Sum IV - Input is a BST/README.md b/solution/0600-0699/0653.Two Sum IV - Input is a BST/README.md
index f9d441d736071..97b76b4ffb2e1 100644
--- a/solution/0600-0699/0653.Two Sum IV - Input is a BST/README.md	
+++ b/solution/0600-0699/0653.Two Sum IV - Input is a BST/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_1.jpg" style="height: 229px; width: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_1.jpg" style="height: 229px; width: 400px;" />
 <pre>
 <strong>输入:</strong> root = [5,3,6,2,4,null,7], k = 9
 <strong>输出:</strong> true
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_2.jpg" style="height: 229px; width: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_2.jpg" style="height: 229px; width: 400px;" />
 <pre>
 <strong>输入:</strong> root = [5,3,6,2,4,null,7], k = 28
 <strong>输出:</strong> false
diff --git a/solution/0600-0699/0653.Two Sum IV - Input is a BST/README_EN.md b/solution/0600-0699/0653.Two Sum IV - Input is a BST/README_EN.md
index 310a9486cda6c..809e854376dd1 100644
--- a/solution/0600-0699/0653.Two Sum IV - Input is a BST/README_EN.md	
+++ b/solution/0600-0699/0653.Two Sum IV - Input is a BST/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_1.jpg" style="width: 400px; height: 229px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_1.jpg" style="width: 400px; height: 229px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,7], k = 9
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_2.jpg" style="width: 400px; height: 229px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0653.Two%20Sum%20IV%20-%20Input%20is%20a%20BST/images/sum_tree_2.jpg" style="width: 400px; height: 229px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,7], k = 28
 <strong>Output:</strong> false
diff --git a/solution/0600-0699/0654.Maximum Binary Tree/README.md b/solution/0600-0699/0654.Maximum Binary Tree/README.md
index 96fd91b315da3..607a57122533e 100644
--- a/solution/0600-0699/0654.Maximum Binary Tree/README.md	
+++ b/solution/0600-0699/0654.Maximum Binary Tree/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree1.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree1.jpg" />
 <pre>
 <strong>输入：</strong>nums = [3,2,1,6,0,5]
 <strong>输出：</strong>[6,3,5,null,2,0,null,null,1]
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree2.jpg" />
 <pre>
 <strong>输入：</strong>nums = [3,2,1]
 <strong>输出：</strong>[3,null,2,null,1]
diff --git a/solution/0600-0699/0654.Maximum Binary Tree/README_EN.md b/solution/0600-0699/0654.Maximum Binary Tree/README_EN.md
index 06d560aab0d40..28d04b44112f7 100644
--- a/solution/0600-0699/0654.Maximum Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0654.Maximum Binary Tree/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree1.jpg" style="width: 302px; height: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree1.jpg" style="width: 302px; height: 421px;" />
 <pre>
 <strong>Input:</strong> nums = [3,2,1,6,0,5]
 <strong>Output:</strong> [6,3,5,null,2,0,null,null,1]
@@ -33,7 +33,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree2.jpg" style="width: 182px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0654.Maximum%20Binary%20Tree/images/tree2.jpg" style="width: 182px; height: 301px;" />
 <pre>
 <strong>Input:</strong> nums = [3,2,1]
 <strong>Output:</strong> [3,null,2,null,1]
diff --git a/solution/0600-0699/0655.Print Binary Tree/README_EN.md b/solution/0600-0699/0655.Print Binary Tree/README_EN.md
index 6d727ee680c9a..fa7e9140168be 100644
--- a/solution/0600-0699/0655.Print Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0655.Print Binary Tree/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0655.Print%20Binary%20Tree/images/print1-tree.jpg" style="width: 141px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0655.Print%20Binary%20Tree/images/print1-tree.jpg" style="width: 141px; height: 181px;" />
 <pre>
 <strong>Input:</strong> root = [1,2]
 <strong>Output:</strong> 
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0655.Print%20Binary%20Tree/images/print2-tree.jpg" style="width: 207px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0655.Print%20Binary%20Tree/images/print2-tree.jpg" style="width: 207px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4]
 <strong>Output:</strong> 
diff --git a/solution/0600-0699/0661.Image Smoother/README.md b/solution/0600-0699/0661.Image Smoother/README.md
index a74a934d287be..60d0d5387ff56 100644
--- a/solution/0600-0699/0661.Image Smoother/README.md	
+++ b/solution/0600-0699/0661.Image Smoother/README.md	
@@ -12,7 +12,7 @@
 
 <p>如果一个单元格周围存在单元格缺失的情况，则计算平均灰度时不考虑缺失的单元格（即，需要计算红色平滑器中 4 个单元格的平均值）。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smoother-grid.jpg" style="height: 493px; width: 493px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smoother-grid.jpg" style="height: 493px; width: 493px;" /></p>
 
 <p>给你一个表示图像灰度的 <code>m x n</code> 整数矩阵 <code>img</code> ，返回对图像的每个单元格平滑处理后的图像&nbsp;。</p>
 
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong>img = [[1,1,1],[1,0,1],[1,1,1]]
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth2-grid.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth2-grid.jpg" />
 <pre>
 <strong>输入:</strong> img = [[100,200,100],[200,50,200],[100,200,100]]
 <strong>输出:</strong> [[137,141,137],[141,138,141],[137,141,137]]
diff --git a/solution/0600-0699/0661.Image Smoother/README_EN.md b/solution/0600-0699/0661.Image Smoother/README_EN.md
index f64d06d67aca4..0695e4dbdcf12 100644
--- a/solution/0600-0699/0661.Image Smoother/README_EN.md	
+++ b/solution/0600-0699/0661.Image Smoother/README_EN.md	
@@ -5,12 +5,12 @@
 ## Description
 
 <p>An <strong>image smoother</strong> is a filter of the size <code>3 x 3</code> that can be applied to each cell of an image by rounding down the average of the cell and the eight surrounding cells (i.e., the average of the nine cells in the blue smoother). If one or more of the surrounding cells of a cell is not present, we do not consider it in the average (i.e., the average of the four cells in the red smoother).</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smoother-grid.jpg" style="width: 493px; height: 493px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smoother-grid.jpg" style="width: 493px; height: 493px;" />
 <p>Given an <code>m x n</code> integer matrix <code>img</code> representing the grayscale of an image, return <em>the image after applying the smoother on each cell of it</em>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth-grid.jpg" style="width: 613px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth-grid.jpg" style="width: 613px; height: 253px;" />
 <pre>
 <strong>Input:</strong> img = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>Output:</strong> [[0,0,0],[0,0,0],[0,0,0]]
@@ -21,7 +21,7 @@ For the point (1,1): floor(8/9) = floor(0.88888889) = 0
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth2-grid.jpg" style="width: 613px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0661.Image%20Smoother/images/smooth2-grid.jpg" style="width: 613px; height: 253px;" />
 <pre>
 <strong>Input:</strong> img = [[100,200,100],[200,50,200],[100,200,100]]
 <strong>Output:</strong> [[137,141,137],[141,138,141],[137,141,137]]
diff --git a/solution/0600-0699/0662.Maximum Width of Binary Tree/README_EN.md b/solution/0600-0699/0662.Maximum Width of Binary Tree/README_EN.md
index ec5d701c17131..34e00ce8da3e4 100644
--- a/solution/0600-0699/0662.Maximum Width of Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0662.Maximum Width of Binary Tree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/width1-tree.jpg" style="width: 359px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/width1-tree.jpg" style="width: 359px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,2,5,3,null,9]
 <strong>Output:</strong> 4
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/maximum-width-of-binary-tree-v3.jpg" style="width: 442px; height: 422px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/maximum-width-of-binary-tree-v3.jpg" style="width: 442px; height: 422px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,2,5,null,null,9,6,null,7]
 <strong>Output:</strong> 7
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/width3-tree.jpg" style="width: 289px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0662.Maximum%20Width%20of%20Binary%20Tree/images/width3-tree.jpg" style="width: 289px; height: 299px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,2,5]
 <strong>Output:</strong> 2
diff --git a/solution/0600-0699/0663.Equal Tree Partition/README_EN.md b/solution/0600-0699/0663.Equal Tree Partition/README_EN.md
index 6b363de5b3d75..d3dfbc44dd582 100644
--- a/solution/0600-0699/0663.Equal Tree Partition/README_EN.md	
+++ b/solution/0600-0699/0663.Equal Tree Partition/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0663.Equal%20Tree%20Partition/images/split1-tree.jpg" style="width: 500px; height: 204px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0663.Equal%20Tree%20Partition/images/split1-tree.jpg" style="width: 500px; height: 204px;" />
 <pre>
 <strong>Input:</strong> root = [5,10,10,null,null,2,3]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0663.Equal%20Tree%20Partition/images/split2-tree.jpg" style="width: 277px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0663.Equal%20Tree%20Partition/images/split2-tree.jpg" style="width: 277px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,10,null,null,2,20]
 <strong>Output:</strong> false
diff --git a/solution/0600-0699/0666.Path Sum IV/README.md b/solution/0600-0699/0666.Path Sum IV/README.md
index b87317f1a8fbe..9b36b219ffcd8 100644
--- a/solution/0600-0699/0666.Path Sum IV/README.md	
+++ b/solution/0600-0699/0666.Path Sum IV/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-1-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-1-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> nums = [113, 215, 221]
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-2-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-2-tree.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> nums = [113, 221]
diff --git a/solution/0600-0699/0666.Path Sum IV/README_EN.md b/solution/0600-0699/0666.Path Sum IV/README_EN.md
index e4b27868563c9..ec6dc3b6d0be6 100644
--- a/solution/0600-0699/0666.Path Sum IV/README_EN.md	
+++ b/solution/0600-0699/0666.Path Sum IV/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-1-tree.jpg" style="width: 212px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-1-tree.jpg" style="width: 212px; height: 183px;" />
 <pre>
 <strong>Input:</strong> nums = [113,215,221]
 <strong>Output:</strong> 12
@@ -27,7 +27,7 @@ The path sum is (3 + 5) + (3 + 1) = 12.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-2-tree.jpg" style="width: 132px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0666.Path%20Sum%20IV/images/pathsum4-2-tree.jpg" style="width: 132px; height: 183px;" />
 <pre>
 <strong>Input:</strong> nums = [113,221]
 <strong>Output:</strong> 4
diff --git a/solution/0600-0699/0668.Kth Smallest Number in Multiplication Table/README_EN.md b/solution/0600-0699/0668.Kth Smallest Number in Multiplication Table/README_EN.md
index a4ceaad9573b9..7e7152b3041af 100644
--- a/solution/0600-0699/0668.Kth Smallest Number in Multiplication Table/README_EN.md	
+++ b/solution/0600-0699/0668.Kth Smallest Number in Multiplication Table/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0668.Kth%20Smallest%20Number%20in%20Multiplication%20Table/images/multtable1-grid.jpg" style="width: 500px; height: 254px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0668.Kth%20Smallest%20Number%20in%20Multiplication%20Table/images/multtable1-grid.jpg" style="width: 500px; height: 254px;" />
 <pre>
 <strong>Input:</strong> m = 3, n = 3, k = 5
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0668.Kth%20Smallest%20Number%20in%20Multiplication%20Table/images/multtable2-grid.jpg" style="width: 493px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0668.Kth%20Smallest%20Number%20in%20Multiplication%20Table/images/multtable2-grid.jpg" style="width: 493px; height: 293px;" />
 <pre>
 <strong>Input:</strong> m = 2, n = 3, k = 6
 <strong>Output:</strong> 6
diff --git a/solution/0600-0699/0669.Trim a Binary Search Tree/README.md b/solution/0600-0699/0669.Trim a Binary Search Tree/README.md
index debc261959170..5af57bd81c49d 100644
--- a/solution/0600-0699/0669.Trim a Binary Search Tree/README.md	
+++ b/solution/0600-0699/0669.Trim a Binary Search Tree/README.md	
@@ -13,14 +13,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim1.jpg" style="height: 126px; width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim1.jpg" style="height: 126px; width: 450px;" />
 <pre>
 <strong>输入：</strong>root = [1,0,2], low = 1, high = 2
 <strong>输出：</strong>[1,null,2]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim2.jpg" style="height: 277px; width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim2.jpg" style="height: 277px; width: 450px;" />
 <pre>
 <strong>输入：</strong>root = [3,0,4,null,2,null,null,1], low = 1, high = 3
 <strong>输出：</strong>[3,2,null,1]
diff --git a/solution/0600-0699/0669.Trim a Binary Search Tree/README_EN.md b/solution/0600-0699/0669.Trim a Binary Search Tree/README_EN.md
index ff6ef0cebcf21..e09b130f6c8b5 100644
--- a/solution/0600-0699/0669.Trim a Binary Search Tree/README_EN.md	
+++ b/solution/0600-0699/0669.Trim a Binary Search Tree/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim1.jpg" style="width: 450px; height: 126px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim1.jpg" style="width: 450px; height: 126px;" />
 <pre>
 <strong>Input:</strong> root = [1,0,2], low = 1, high = 2
 <strong>Output:</strong> [1,null,2]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim2.jpg" style="width: 450px; height: 277px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0669.Trim%20a%20Binary%20Search%20Tree/images/trim2.jpg" style="width: 450px; height: 277px;" />
 <pre>
 <strong>Input:</strong> root = [3,0,4,null,2,null,null,1], low = 1, high = 3
 <strong>Output:</strong> [3,2,null,1]
diff --git a/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README.md b/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README.md
index 900b07460bad2..6a335b2b9925f 100644
--- a/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README.md	
+++ b/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt1.jpg" style="height: 210px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt1.jpg" style="height: 210px; width: 300px;" />
 <pre>
 <strong>输入：</strong>root = [2,2,5,null,null,5,7]
 <strong>输出：</strong>5
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt2.jpg" style="height: 113px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt2.jpg" style="height: 113px; width: 200px;" />
 <pre>
 <strong>输入：</strong>root = [2,2,2]
 <strong>输出：</strong>-1
diff --git a/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README_EN.md b/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README_EN.md
index 81833dfcdea46..c9fb827be352f 100644
--- a/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README_EN.md	
+++ b/solution/0600-0699/0671.Second Minimum Node In a Binary Tree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt1.jpg" style="width: 431px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt1.jpg" style="width: 431px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [2,2,5,null,null,5,7]
 <strong>Output:</strong> 5
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt2.jpg" style="width: 321px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0671.Second%20Minimum%20Node%20In%20a%20Binary%20Tree/images/smbt2.jpg" style="width: 321px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [2,2,2]
 <strong>Output:</strong> -1
diff --git a/solution/0600-0699/0675.Cut Off Trees for Golf Event/README.md b/solution/0600-0699/0675.Cut Off Trees for Golf Event/README.md
index 951ce5677523c..806e864f0cefc 100644
--- a/solution/0600-0699/0675.Cut Off Trees for Golf Event/README.md	
+++ b/solution/0600-0699/0675.Cut Off Trees for Golf Event/README.md	
@@ -25,14 +25,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>forest = [[1,2,3],[0,0,4],[7,6,5]]
 <strong>输出：</strong>6
 <strong>解释：</strong>沿着上面的路径，你可以用 6 步，按从最矮到最高的顺序砍掉这些树。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees2.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees2.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>输入：</strong>forest = [[1,2,3],[0,0,0],[7,6,5]]
 <strong>输出：</strong>-1
diff --git a/solution/0600-0699/0675.Cut Off Trees for Golf Event/README_EN.md b/solution/0600-0699/0675.Cut Off Trees for Golf Event/README_EN.md
index e09fad5afc149..ca690de0fb43f 100644
--- a/solution/0600-0699/0675.Cut Off Trees for Golf Event/README_EN.md	
+++ b/solution/0600-0699/0675.Cut Off Trees for Golf Event/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> forest = [[1,2,3],[0,0,4],[7,6,5]]
 <strong>Output:</strong> 6
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees2.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0675.Cut%20Off%20Trees%20for%20Golf%20Event/images/trees2.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> forest = [[1,2,3],[0,0,0],[7,6,5]]
 <strong>Output:</strong> -1
diff --git a/solution/0600-0699/0684.Redundant Connection/README.md b/solution/0600-0699/0684.Redundant Connection/README.md
index 282234c5e6cde..04e75556b22c0 100644
--- a/solution/0600-0699/0684.Redundant Connection/README.md	
+++ b/solution/0600-0699/0684.Redundant Connection/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/1626676174-hOEVUL-image.png" style="width: 152px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/1626676174-hOEVUL-image.png" style="width: 152px; " /></p>
 
 <pre>
 <strong>输入:</strong> edges = [[1,2], [1,3], [2,3]]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/1626676179-kGxcmu-image.png" style="width: 250px; " /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/1626676179-kGxcmu-image.png" style="width: 250px; " /></p>
 
 <pre>
 <strong>输入:</strong> edges = [[1,2], [2,3], [3,4], [1,4], [1,5]]
diff --git a/solution/0600-0699/0684.Redundant Connection/README_EN.md b/solution/0600-0699/0684.Redundant Connection/README_EN.md
index ff27167be7da8..3c7f779857eec 100644
--- a/solution/0600-0699/0684.Redundant Connection/README_EN.md	
+++ b/solution/0600-0699/0684.Redundant Connection/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/reduntant1-1-graph.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/reduntant1-1-graph.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> edges = [[1,2],[1,3],[2,3]]
 <strong>Output:</strong> [2,3]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/reduntant1-2-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0684.Redundant%20Connection/images/reduntant1-2-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> edges = [[1,2],[2,3],[3,4],[1,4],[1,5]]
 <strong>Output:</strong> [1,4]
diff --git a/solution/0600-0699/0685.Redundant Connection II/README.md b/solution/0600-0699/0685.Redundant Connection II/README.md
index 14eb6beceef33..2b57386b6ab09 100644
--- a/solution/0600-0699/0685.Redundant Connection II/README.md	
+++ b/solution/0600-0699/0685.Redundant Connection II/README.md	
@@ -17,14 +17,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph1.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph1.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>输入：</strong>edges = [[1,2],[1,3],[2,3]]
 <strong>输出：</strong>[2,3]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph2.jpg" style="width: 222px; height: 382px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph2.jpg" style="width: 222px; height: 382px;" />
 <pre>
 <strong>输入：</strong>edges = [[1,2],[2,3],[3,4],[4,1],[1,5]]
 <strong>输出：</strong>[4,1]
diff --git a/solution/0600-0699/0685.Redundant Connection II/README_EN.md b/solution/0600-0699/0685.Redundant Connection II/README_EN.md
index 399f49ae03243..2ba23375cf8c2 100644
--- a/solution/0600-0699/0685.Redundant Connection II/README_EN.md	
+++ b/solution/0600-0699/0685.Redundant Connection II/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph1.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph1.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> edges = [[1,2],[1,3],[2,3]]
 <strong>Output:</strong> [2,3]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph2.jpg" style="width: 222px; height: 382px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0685.Redundant%20Connection%20II/images/graph2.jpg" style="width: 222px; height: 382px;" />
 <pre>
 <strong>Input:</strong> edges = [[1,2],[2,3],[3,4],[4,1],[1,5]]
 <strong>Output:</strong> [4,1]
diff --git a/solution/0600-0699/0687.Longest Univalue Path/README.md b/solution/0600-0699/0687.Longest Univalue Path/README.md
index c11091a6ae81c..242381e2e60b3 100644
--- a/solution/0600-0699/0687.Longest Univalue Path/README.md	
+++ b/solution/0600-0699/0687.Longest Univalue Path/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,4,5,1,1,5]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex2.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,4,5,4,4,5]
diff --git a/solution/0600-0699/0687.Longest Univalue Path/README_EN.md b/solution/0600-0699/0687.Longest Univalue Path/README_EN.md
index 361361e041e22..e2b088cf00220 100644
--- a/solution/0600-0699/0687.Longest Univalue Path/README_EN.md	
+++ b/solution/0600-0699/0687.Longest Univalue Path/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex1.jpg" style="width: 571px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex1.jpg" style="width: 571px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [5,4,5,1,1,5]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex2.jpg" style="width: 571px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0687.Longest%20Univalue%20Path/images/ex2.jpg" style="width: 571px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [1,4,5,4,4,5]
 <strong>Output:</strong> 2
diff --git a/solution/0600-0699/0688.Knight Probability in Chessboard/README.md b/solution/0600-0699/0688.Knight Probability in Chessboard/README.md
index bfd0b6538776b..96a8afc0596c9 100644
--- a/solution/0600-0699/0688.Knight Probability in Chessboard/README.md	
+++ b/solution/0600-0699/0688.Knight Probability in Chessboard/README.md	
@@ -10,7 +10,7 @@
 
 <p>象棋骑士有8种可能的走法，如下图所示。每次移动在基本方向上是两个单元格，然后在正交方向上是一个单元格。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0688.Knight%20Probability%20in%20Chessboard/images/knight.png" style="height: 300px; width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0688.Knight%20Probability%20in%20Chessboard/images/knight.png" style="height: 300px; width: 300px;" /></p>
 
 <p>每次骑士要移动时，它都会随机从8种可能的移动中选择一种(即使棋子会离开棋盘)，然后移动到那里。</p>
 
diff --git a/solution/0600-0699/0688.Knight Probability in Chessboard/README_EN.md b/solution/0600-0699/0688.Knight Probability in Chessboard/README_EN.md
index 365b579d77b4b..36f796c46a5f4 100644
--- a/solution/0600-0699/0688.Knight Probability in Chessboard/README_EN.md	
+++ b/solution/0600-0699/0688.Knight Probability in Chessboard/README_EN.md	
@@ -7,7 +7,7 @@
 <p>On an <code>n x n</code> chessboard, a knight starts at the cell <code>(row, column)</code> and attempts to make exactly <code>k</code> moves. The rows and columns are <strong>0-indexed</strong>, so the top-left cell is <code>(0, 0)</code>, and the bottom-right cell is <code>(n - 1, n - 1)</code>.</p>
 
 <p>A chess knight has eight possible moves it can make, as illustrated below. Each move is two cells in a cardinal direction, then one cell in an orthogonal direction.</p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0688.Knight%20Probability%20in%20Chessboard/images/knight.png" style="width: 300px; height: 300px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0688.Knight%20Probability%20in%20Chessboard/images/knight.png" style="width: 300px; height: 300px;" />
 <p>Each time the knight is to move, it chooses one of eight possible moves uniformly at random (even if the piece would go off the chessboard) and moves there.</p>
 
 <p>The knight continues moving until it has made exactly <code>k</code> moves or has moved off the chessboard.</p>
diff --git a/solution/0600-0699/0690.Employee Importance/README_EN.md b/solution/0600-0699/0690.Employee Importance/README_EN.md
index 4415b40e88373..d2a6b0d154f5c 100644
--- a/solution/0600-0699/0690.Employee Importance/README_EN.md	
+++ b/solution/0600-0699/0690.Employee Importance/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0690.Employee%20Importance/images/emp1-tree.jpg" style="width: 400px; height: 258px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0690.Employee%20Importance/images/emp1-tree.jpg" style="width: 400px; height: 258px;" />
 <pre>
 <strong>Input:</strong> employees = [[1,5,[2,3]],[2,3,[]],[3,3,[]]], id = 1
 <strong>Output:</strong> 11
@@ -28,7 +28,7 @@ Thus, the total importance value of employee 1 is 5 + 3 + 3 = 11.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0690.Employee%20Importance/images/emp2-tree.jpg" style="width: 362px; height: 361px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0690.Employee%20Importance/images/emp2-tree.jpg" style="width: 362px; height: 361px;" />
 <pre>
 <strong>Input:</strong> employees = [[1,2,[5]],[5,-3,[]]], id = 5
 <strong>Output:</strong> -3
diff --git a/solution/0600-0699/0694.Number of Distinct Islands/README_EN.md b/solution/0600-0699/0694.Number of Distinct Islands/README_EN.md
index 1ec54e1a94b7e..b61bded56dd1e 100644
--- a/solution/0600-0699/0694.Number of Distinct Islands/README_EN.md	
+++ b/solution/0600-0699/0694.Number of Distinct Islands/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0694.Number%20of%20Distinct%20Islands/images/distinctisland1-1-grid.jpg" style="width: 413px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0694.Number%20of%20Distinct%20Islands/images/distinctisland1-1-grid.jpg" style="width: 413px; height: 334px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0,0,0],[1,1,0,0,0],[0,0,0,1,1],[0,0,0,1,1]]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0694.Number%20of%20Distinct%20Islands/images/distinctisland1-2-grid.jpg" style="width: 413px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0694.Number%20of%20Distinct%20Islands/images/distinctisland1-2-grid.jpg" style="width: 413px; height: 334px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0,1,1],[1,0,0,0,0],[0,0,0,0,1],[1,1,0,1,1]]
 <strong>Output:</strong> 3
diff --git a/solution/0600-0699/0695.Max Area of Island/README.md b/solution/0600-0699/0695.Max Area of Island/README.md
index 8f4cf954ced13..7f9bfbf4c6ecd 100644
--- a/solution/0600-0699/0695.Max Area of Island/README.md	
+++ b/solution/0600-0699/0695.Max Area of Island/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0695.Max%20Area%20of%20Island/images/maxarea1-grid.jpg" style="width: 500px; height: 310px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0695.Max%20Area%20of%20Island/images/maxarea1-grid.jpg" style="width: 500px; height: 310px;" />
 <pre>
 <strong>输入：</strong>grid = [[0,0,1,0,0,0,0,1,0,0,0,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,1,1,0,1,0,0,0,0,0,0,0,0],[0,1,0,0,1,1,0,0,1,0,1,0,0],[0,1,0,0,1,1,0,0,1,1,1,0,0],[0,0,0,0,0,0,0,0,0,0,1,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,0,0,0,0,0,0,1,1,0,0,0,0]]
 <strong>输出：</strong>6
diff --git a/solution/0600-0699/0695.Max Area of Island/README_EN.md b/solution/0600-0699/0695.Max Area of Island/README_EN.md
index 02455b5f259ea..2924ec5bab518 100644
--- a/solution/0600-0699/0695.Max Area of Island/README_EN.md	
+++ b/solution/0600-0699/0695.Max Area of Island/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0695.Max%20Area%20of%20Island/images/maxarea1-grid.jpg" style="width: 500px; height: 310px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0695.Max%20Area%20of%20Island/images/maxarea1-grid.jpg" style="width: 500px; height: 310px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,1,0,0,0,0,1,0,0,0,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,1,1,0,1,0,0,0,0,0,0,0,0],[0,1,0,0,1,1,0,0,1,0,1,0,0],[0,1,0,0,1,1,0,0,1,1,1,0,0],[0,0,0,0,0,0,0,0,0,0,1,0,0],[0,0,0,0,0,0,0,1,1,1,0,0,0],[0,0,0,0,0,0,0,1,1,0,0,0,0]]
 <strong>Output:</strong> 6
diff --git a/solution/0600-0699/0699.Falling Squares/README_EN.md b/solution/0600-0699/0699.Falling Squares/README_EN.md
index 25251dbdc931c..5fa0721dbb649 100644
--- a/solution/0600-0699/0699.Falling Squares/README_EN.md	
+++ b/solution/0600-0699/0699.Falling Squares/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0699.Falling%20Squares/images/fallingsq1-plane.jpg" style="width: 500px; height: 505px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0600-0699/0699.Falling%20Squares/images/fallingsq1-plane.jpg" style="width: 500px; height: 505px;" />
 <pre>
 <strong>Input:</strong> positions = [[1,2],[2,3],[6,1]]
 <strong>Output:</strong> [2,5,5]
diff --git a/solution/0700-0799/0700.Search in a Binary Search Tree/README.md b/solution/0700-0799/0700.Search in a Binary Search Tree/README.md
index 26fb4228ec57b..0647fbe570efb 100644
--- a/solution/0700-0799/0700.Search in a Binary Search Tree/README.md	
+++ b/solution/0700-0799/0700.Search in a Binary Search Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree1.jpg" style="height: 179px; width: 250px;" /><meta charset="UTF-8" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree1.jpg" style="height: 179px; width: 250px;" /><meta charset="UTF-8" /></p>
 
 <pre>
 <b>输入：</b>root = [4,2,7,1,3], val = 2
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree2.jpg" style="height: 179px; width: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree2.jpg" style="height: 179px; width: 250px;" />
 <pre>
 <b>输入：</b>root = [4,2,7,1,3], val = 5
 <b>输出：</b>[]
diff --git a/solution/0700-0799/0700.Search in a Binary Search Tree/README_EN.md b/solution/0700-0799/0700.Search in a Binary Search Tree/README_EN.md
index a0f40866e59fd..07a8ae9c71da6 100644
--- a/solution/0700-0799/0700.Search in a Binary Search Tree/README_EN.md	
+++ b/solution/0700-0799/0700.Search in a Binary Search Tree/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 422px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree1.jpg" style="width: 422px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,7,1,3], val = 2
 <strong>Output:</strong> [2,1,3]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0700.Search%20in%20a%20Binary%20Search%20Tree/images/tree2.jpg" style="width: 422px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,7,1,3], val = 5
 <strong>Output:</strong> []
diff --git a/solution/0700-0799/0701.Insert into a Binary Search Tree/README.md b/solution/0700-0799/0701.Insert into a Binary Search Tree/README.md
index 9ad95c241fe6f..07c70c93269dc 100644
--- a/solution/0700-0799/0701.Insert into a Binary Search Tree/README.md	
+++ b/solution/0700-0799/0701.Insert into a Binary Search Tree/README.md	
@@ -13,12 +13,12 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/insertbst.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/insertbst.jpg" />
 <pre>
 <strong>输入：</strong>root = [4,2,7,1,3], val = 5
 <strong>输出：</strong>[4,2,7,1,3,5]
 <strong>解释：</strong>另一个满足题目要求可以通过的树是：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/bst.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/bst.jpg" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/0700-0799/0701.Insert into a Binary Search Tree/README_EN.md b/solution/0700-0799/0701.Insert into a Binary Search Tree/README_EN.md
index 20e5c9b6e1bba..781ca0c018a67 100644
--- a/solution/0700-0799/0701.Insert into a Binary Search Tree/README_EN.md	
+++ b/solution/0700-0799/0701.Insert into a Binary Search Tree/README_EN.md	
@@ -10,12 +10,12 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/insertbst.jpg" style="width: 752px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/insertbst.jpg" style="width: 752px; height: 221px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,7,1,3], val = 5
 <strong>Output:</strong> [4,2,7,1,3,5]
 <strong>Explanation:</strong> Another accepted tree is:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/bst.jpg" style="width: 352px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0701.Insert%20into%20a%20Binary%20Search%20Tree/images/bst.jpg" style="width: 352px; height: 301px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README.md b/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README.md
index 73d167219d6db..e5d3572434bf9 100644
--- a/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README.md	
+++ b/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README.md	
@@ -17,14 +17,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_before_65p.jpg" style="height: 149px; width: 250px;" /><br />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_before_65p.jpg" style="height: 149px; width: 250px;" /><br />
 &nbsp;
 <pre>
 <strong>输入：</strong>head = [3,4,1], insertVal = 2
 <strong>输出：</strong>[3,4,1,2]
 <strong>解释：</strong>在上图中，有一个包含三个元素的循环有序列表，你获得值为 3 的节点的指针，我们需要向表中插入元素 2 。新插入的节点应该在 1 和 3 之间，插入之后，整个列表如上图所示，最后返回节点 3 。
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_after_65p.jpg" style="height: 149px; width: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_after_65p.jpg" style="height: 149px; width: 250px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README_EN.md b/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README_EN.md
index 5cdcb5ed2564b..60808150c4c86 100644
--- a/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README_EN.md	
+++ b/solution/0700-0799/0708.Insert into a Sorted Circular Linked List/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_before_65p.jpg" style="width: 250px; height: 149px;" /><br />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_before_65p.jpg" style="width: 250px; height: 149px;" /><br />
 &nbsp;
 <pre>
 <strong>Input:</strong> head = [3,4,1], insertVal = 2
 <strong>Output:</strong> [3,4,1,2]
 <strong>Explanation:</strong> In the figure above, there is a sorted circular list of three elements. You are given a reference to the node with value 3, and we need to insert 2 into the list. The new node should be inserted between node 1 and node 3. After the insertion, the list should look like this, and we should still return node 3.
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_after_65p.jpg" style="width: 250px; height: 149px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0708.Insert%20into%20a%20Sorted%20Circular%20Linked%20List/images/example_1_after_65p.jpg" style="width: 250px; height: 149px;" />
 
 </pre>
 
diff --git a/solution/0700-0799/0711.Number of Distinct Islands II/README.md b/solution/0700-0799/0711.Number of Distinct Islands II/README.md
index 471c7748c0ab0..52cdfbd110203 100644
--- a/solution/0700-0799/0711.Number of Distinct Islands II/README.md	
+++ b/solution/0700-0799/0711.Number of Distinct Islands II/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland2-1-grid.jpg" style="height: 162px; width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland2-1-grid.jpg" style="height: 162px; width: 200px;" /></p>
 
 <pre>
 <strong>输入:</strong> grid = [[1,1,0,0,0],[1,0,0,0,0],[0,0,0,0,1],[0,0,0,1,1]]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland1-1-grid.jpg" style="height: 162px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland1-1-grid.jpg" style="height: 162px; width: 200px;" /></p>
 
 <pre>
 <strong>输入:</strong> grid = [[1,1,0,0,0],[1,1,0,0,0],[0,0,0,1,1],[0,0,0,1,1]]
diff --git a/solution/0700-0799/0711.Number of Distinct Islands II/README_EN.md b/solution/0700-0799/0711.Number of Distinct Islands II/README_EN.md
index 768e27ce423d9..a7298c3d8500f 100644
--- a/solution/0700-0799/0711.Number of Distinct Islands II/README_EN.md	
+++ b/solution/0700-0799/0711.Number of Distinct Islands II/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland2-1-grid.jpg" style="width: 413px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland2-1-grid.jpg" style="width: 413px; height: 334px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0,0,0],[1,0,0,0,0],[0,0,0,0,1],[0,0,0,1,1]]
 <strong>Output:</strong> 1
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland1-1-grid.jpg" style="width: 413px; height: 334px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0711.Number%20of%20Distinct%20Islands%20II/images/distinctisland1-1-grid.jpg" style="width: 413px; height: 334px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0,0,0],[1,1,0,0,0],[0,0,0,1,1],[0,0,0,1,1]]
 <strong>Output:</strong> 1
diff --git a/solution/0700-0799/0723.Candy Crush/README.md b/solution/0700-0799/0723.Candy Crush/README.md
index eab076bc52e1d..a27c3e4072803 100644
--- a/solution/0700-0799/0723.Candy Crush/README.md	
+++ b/solution/0700-0799/0723.Candy Crush/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1 :</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0723.Candy%20Crush/images/candy_crush_example_2.png" style="height: 411px; width: 600px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0723.Candy%20Crush/images/candy_crush_example_2.png" style="height: 411px; width: 600px;" /></p>
 
 <pre>
 <strong>输入: </strong>board = [[110,5,112,113,114],[210,211,5,213,214],[310,311,3,313,314],[410,411,412,5,414],[5,1,512,3,3],[610,4,1,613,614],[710,1,2,713,714],[810,1,2,1,1],[1,1,2,2,2],[4,1,4,4,1014]]
diff --git a/solution/0700-0799/0723.Candy Crush/README_EN.md b/solution/0700-0799/0723.Candy Crush/README_EN.md
index e094cdbb2535a..9046e6a4243cd 100644
--- a/solution/0700-0799/0723.Candy Crush/README_EN.md	
+++ b/solution/0700-0799/0723.Candy Crush/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0723.Candy%20Crush/images/candy_crush_example_2.png" style="width: 600px; height: 411px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0723.Candy%20Crush/images/candy_crush_example_2.png" style="width: 600px; height: 411px;" />
 <pre>
 <strong>Input:</strong> board = [[110,5,112,113,114],[210,211,5,213,214],[310,311,3,313,314],[410,411,412,5,414],[5,1,512,3,3],[610,4,1,613,614],[710,1,2,713,714],[810,1,2,1,1],[1,1,2,2,2],[4,1,4,4,1014]]
 <strong>Output:</strong> [[0,0,0,0,0],[0,0,0,0,0],[0,0,0,0,0],[110,0,0,0,114],[210,0,0,0,214],[310,0,0,113,314],[410,0,0,213,414],[610,211,112,313,614],[710,311,412,613,714],[810,411,512,713,1014]]
diff --git a/solution/0700-0799/0725.Split Linked List in Parts/README.md b/solution/0700-0799/0725.Split Linked List in Parts/README.md
index 3787e8dee9de1..2205b75c76316 100644
--- a/solution/0700-0799/0725.Split Linked List in Parts/README.md	
+++ b/solution/0700-0799/0725.Split Linked List in Parts/README.md	
@@ -16,7 +16,7 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split1-lc.jpg" style="width: 400px; height: 134px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split1-lc.jpg" style="width: 400px; height: 134px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3], k = 5
 <strong>输出：</strong>[[1],[2],[3],[],[]]
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split2-lc.jpg" style="width: 600px; height: 60px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split2-lc.jpg" style="width: 600px; height: 60px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5,6,7,8,9,10], k = 3
 <strong>输出：</strong>[[1,2,3,4],[5,6,7],[8,9,10]]
diff --git a/solution/0700-0799/0725.Split Linked List in Parts/README_EN.md b/solution/0700-0799/0725.Split Linked List in Parts/README_EN.md
index c2141b718361b..ef0bc19853ae5 100644
--- a/solution/0700-0799/0725.Split Linked List in Parts/README_EN.md	
+++ b/solution/0700-0799/0725.Split Linked List in Parts/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split1-lc.jpg" style="width: 400px; height: 134px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split1-lc.jpg" style="width: 400px; height: 134px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3], k = 5
 <strong>Output:</strong> [[1],[2],[3],[],[]]
@@ -24,7 +24,7 @@ The last element output[4] is null, but its string representation as a ListNode
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split2-lc.jpg" style="width: 600px; height: 60px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0725.Split%20Linked%20List%20in%20Parts/images/split2-lc.jpg" style="width: 600px; height: 60px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5,6,7,8,9,10], k = 3
 <strong>Output:</strong> [[1,2,3,4],[5,6,7],[8,9,10]]
diff --git a/solution/0700-0799/0733.Flood Fill/README.md b/solution/0700-0799/0733.Flood Fill/README.md
index f3c21634a361b..3e2fe3b23924c 100644
--- a/solution/0700-0799/0733.Flood Fill/README.md	
+++ b/solution/0700-0799/0733.Flood Fill/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0733.Flood%20Fill/images/flood1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0733.Flood%20Fill/images/flood1-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> image = [[1,1,1],[1,1,0],[1,0,1]]，sr = 1, sc = 1, newColor = 2
diff --git a/solution/0700-0799/0733.Flood Fill/README_EN.md b/solution/0700-0799/0733.Flood Fill/README_EN.md
index ecff6a401196e..db321b1d81268 100644
--- a/solution/0700-0799/0733.Flood Fill/README_EN.md	
+++ b/solution/0700-0799/0733.Flood Fill/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0733.Flood%20Fill/images/flood1-grid.jpg" style="width: 613px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0733.Flood%20Fill/images/flood1-grid.jpg" style="width: 613px; height: 253px;" />
 <pre>
 <strong>Input:</strong> image = [[1,1,1],[1,1,0],[1,0,1]], sr = 1, sc = 1, newColor = 2
 <strong>Output:</strong> [[2,2,2],[2,2,0],[2,0,1]]
diff --git a/solution/0700-0799/0741.Cherry Pickup/README_EN.md b/solution/0700-0799/0741.Cherry Pickup/README_EN.md
index b35f63511170a..7000cc48452f9 100644
--- a/solution/0700-0799/0741.Cherry Pickup/README_EN.md	
+++ b/solution/0700-0799/0741.Cherry Pickup/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0741.Cherry%20Pickup/images/grid.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0741.Cherry%20Pickup/images/grid.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,-1],[1,0,-1],[1,1,1]]
 <strong>Output:</strong> 5
diff --git a/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README.md b/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README.md
index f2c0de4ed8a0c..6ffd2a55375bf 100644
--- a/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README.md	
+++ b/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest1-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest1-tree.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1, 3, 2], k = 1
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest2-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest2-tree.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1], k = 1
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest3-tree.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest3-tree.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,null,null,null,5,null,6], k = 2
diff --git a/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README_EN.md b/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README_EN.md
index f4d6c8df8c048..4d301f02b6646 100644
--- a/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README_EN.md	
+++ b/solution/0700-0799/0742.Closest Leaf in a Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest1-tree.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest1-tree.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> root = [1,3,2], k = 1
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest2-tree.jpg" style="width: 64px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest2-tree.jpg" style="width: 64px; height: 65px;" />
 <pre>
 <strong>Input:</strong> root = [1], k = 1
 <strong>Output:</strong> 1
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest3-tree.jpg" style="width: 464px; height: 384px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0742.Closest%20Leaf%20in%20a%20Binary%20Tree/images/closest3-tree.jpg" style="width: 464px; height: 384px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,null,null,null,5,null,6], k = 2
 <strong>Output:</strong> 3
diff --git a/solution/0700-0799/0743.Network Delay Time/README.md b/solution/0700-0799/0743.Network Delay Time/README.md
index 94893e4d411d8..2e7c2acc50547 100644
--- a/solution/0700-0799/0743.Network Delay Time/README.md	
+++ b/solution/0700-0799/0743.Network Delay Time/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0743.Network%20Delay%20Time/images/931_example_1.png" style="height: 220px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0743.Network%20Delay%20Time/images/931_example_1.png" style="height: 220px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>times = [[2,1,1],[2,3,1],[3,4,1]], n = 4, k = 2
diff --git a/solution/0700-0799/0743.Network Delay Time/README_EN.md b/solution/0700-0799/0743.Network Delay Time/README_EN.md
index b529925dd6365..61d1a8cc71776 100644
--- a/solution/0700-0799/0743.Network Delay Time/README_EN.md	
+++ b/solution/0700-0799/0743.Network Delay Time/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0743.Network%20Delay%20Time/images/931_example_1.png" style="width: 217px; height: 239px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0743.Network%20Delay%20Time/images/931_example_1.png" style="width: 217px; height: 239px;" />
 <pre>
 <strong>Input:</strong> times = [[2,1,1],[2,3,1],[3,4,1]], n = 4, k = 2
 <strong>Output:</strong> 2
diff --git a/solution/0700-0799/0749.Contain Virus/README.md b/solution/0700-0799/0749.Contain Virus/README.md
index 305758ba9d2f8..30c1833486c89 100644
--- a/solution/0700-0799/0749.Contain Virus/README.md	
+++ b/solution/0700-0799/0749.Contain Virus/README.md	
@@ -18,21 +18,21 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus11-grid.jpg" style="height: 255px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus11-grid.jpg" style="height: 255px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> isInfected = [[0,1,0,0,0,0,0,1],[0,1,0,0,0,0,0,1],[0,0,0,0,0,0,0,1],[0,0,0,0,0,0,0,0]]
 <strong>输出:</strong> 10
 <strong>解释:</strong>一共有两块被病毒感染的区域。
 在第一天，添加 5 墙隔离病毒区域的左侧。病毒传播后的状态是:
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus12edited-grid.jpg" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus12edited-grid.jpg" />
 第二天，在右侧添加 5 个墙来隔离病毒区域。此时病毒已经被完全控制住了。
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus13edited-grid.jpg" style="height: 261px; width: 500px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus13edited-grid.jpg" style="height: 261px; width: 500px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus2-grid.jpg" style="height: 253px; width: https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/653px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus2-grid.jpg" style="height: 253px; width: https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/653px;" /></p>
 
 <pre>
 <strong>输入:</strong> isInfected = [[1,1,1],[1,0,1],[1,1,1]]
diff --git a/solution/0700-0799/0749.Contain Virus/README_EN.md b/solution/0700-0799/0749.Contain Virus/README_EN.md
index d6324451cff4d..4dcb446adb815 100644
--- a/solution/0700-0799/0749.Contain Virus/README_EN.md	
+++ b/solution/0700-0799/0749.Contain Virus/README_EN.md	
@@ -14,19 +14,19 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus11-grid.jpg" style="width: 500px; height: 255px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus11-grid.jpg" style="width: 500px; height: 255px;" />
 <pre>
 <strong>Input:</strong> isInfected = [[0,1,0,0,0,0,0,1],[0,1,0,0,0,0,0,1],[0,0,0,0,0,0,0,1],[0,0,0,0,0,0,0,0]]
 <strong>Output:</strong> 10
 <strong>Explanation:</strong> There are 2 contaminated regions.
 On the first day, add 5 walls to quarantine the viral region on the left. The board after the virus spreads is:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus12edited-grid.jpg" style="width: 500px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus12edited-grid.jpg" style="width: 500px; height: 257px;" />
 On the second day, add 5 walls to quarantine the viral region on the right. The virus is fully contained.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus13edited-grid.jpg" style="width: 500px; height: 261px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus13edited-grid.jpg" style="width: 500px; height: 261px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus2-grid.jpg" style="width: 653px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0749.Contain%20Virus/images/virus2-grid.jpg" style="width: 653px; height: 253px;" />
 <pre>
 <strong>Input:</strong> isInfected = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>Output:</strong> 4
diff --git a/solution/0700-0799/0750.Number Of Corner Rectangles/README.md b/solution/0700-0799/0750.Number Of Corner Rectangles/README.md
index c026697d6bfeb..fc0aa2d9a7072 100644
--- a/solution/0700-0799/0750.Number Of Corner Rectangles/README.md	
+++ b/solution/0700-0799/0750.Number Of Corner Rectangles/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec1-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,0,0,1,0],[0,0,1,0,1],[0,0,0,1,0],[1,0,1,0,1]]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec2-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,1,1],[1,1,1],[1,1,1]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec3-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec3-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,1,1,1]]
diff --git a/solution/0700-0799/0750.Number Of Corner Rectangles/README_EN.md b/solution/0700-0799/0750.Number Of Corner Rectangles/README_EN.md
index 8684e537a1224..2bd6b930db1a5 100644
--- a/solution/0700-0799/0750.Number Of Corner Rectangles/README_EN.md	
+++ b/solution/0700-0799/0750.Number Of Corner Rectangles/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec1-grid.jpg" style="width: 413px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec1-grid.jpg" style="width: 413px; height: 333px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,1,0],[0,0,1,0,1],[0,0,0,1,0],[1,0,1,0,1]]
 <strong>Output:</strong> 1
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[1,1,1],[1,1,1]]
 <strong>Output:</strong> 9
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec3-grid.jpg" style="width: 333px; height: 93px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0750.Number%20Of%20Corner%20Rectangles/images/cornerrec3-grid.jpg" style="width: 333px; height: 93px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,1]]
 <strong>Output:</strong> 0
diff --git a/solution/0700-0799/0755.Pour Water/README_EN.md b/solution/0700-0799/0755.Pour Water/README_EN.md
index 17bb01bfbb2c9..147316c4e8157 100644
--- a/solution/0700-0799/0755.Pour Water/README_EN.md	
+++ b/solution/0700-0799/0755.Pour Water/README_EN.md	
@@ -20,20 +20,20 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour11-grid.jpg" style="width: 450px; height: 303px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour11-grid.jpg" style="width: 450px; height: 303px;" />
 <pre>
 <strong>Input:</strong> heights = [2,1,1,2,1,2,2], volume = 4, k = 3
 <strong>Output:</strong> [2,2,2,3,2,2,2]
 <strong>Explanation:</strong>
 The first drop of water lands at index k = 3. When moving left or right, the water can only move to the same level or a lower level. (By level, we mean the total height of the terrain plus any water in that column.)
 Since moving left will eventually make it fall, it moves left. (A droplet &quot;made to fall&quot; means go to a lower height than it was at previously.) Since moving left will not make it fall, it stays in place.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour12-grid.jpg" style="width: 400px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour12-grid.jpg" style="width: 400px; height: 269px;" />
 The next droplet falls at index k = 3. Since the new droplet moving left will eventually make it fall, it moves left. Notice that the droplet still preferred to move left, even though it could move right (and moving right makes it fall quicker.)
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour13-grid.jpg" style="width: 400px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour13-grid.jpg" style="width: 400px; height: 269px;" />
 The third droplet falls at index k = 3. Since moving left would not eventually make it fall, it tries to move right. Since moving right would eventually make it fall, it moves right.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour14-grid.jpg" style="width: 400px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour14-grid.jpg" style="width: 400px; height: 269px;" />
 Finally, the fourth droplet falls at index k = 3. Since moving left would not eventually make it fall, it tries to move right. Since moving right would not eventually make it fall, it stays in place.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour15-grid.jpg" style="width: 400px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0755.Pour%20Water/images/pour15-grid.jpg" style="width: 400px; height: 269px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0700-0799/0756.Pyramid Transition Matrix/README.md b/solution/0700-0799/0756.Pyramid Transition Matrix/README.md
index 726f9c439bfc5..2bb4881b6a5a9 100644
--- a/solution/0700-0799/0756.Pyramid Transition Matrix/README.md	
+++ b/solution/0700-0799/0756.Pyramid Transition Matrix/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid1-grid.jpg" style="height: 232px; width: 600px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid1-grid.jpg" style="height: 232px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>bottom = "BCD", allowed = ["BCG", "CDE", "GEA", "FFF"]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid2-grid.jpg" style="height: 359px; width: 600px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid2-grid.jpg" style="height: 359px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>bottom = "AABA", allowed = ["AAA", "AAB", "ABA", "ABB", "BAC"]
diff --git a/solution/0700-0799/0756.Pyramid Transition Matrix/README_EN.md b/solution/0700-0799/0756.Pyramid Transition Matrix/README_EN.md
index 56f25b87f3e8b..c0cafd719b8c5 100644
--- a/solution/0700-0799/0756.Pyramid Transition Matrix/README_EN.md	
+++ b/solution/0700-0799/0756.Pyramid Transition Matrix/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid1-grid.jpg" style="width: 600px; height: 232px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid1-grid.jpg" style="width: 600px; height: 232px;" />
 <pre>
 <strong>Input:</strong> bottom = &quot;BCD&quot;, allowed = [&quot;BCC&quot;,&quot;CDE&quot;,&quot;CEA&quot;,&quot;FFF&quot;]
 <strong>Output:</strong> true
@@ -28,7 +28,7 @@ There are three triangular patterns in the pyramid, which are &quot;BCC&quot;, &
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid2-grid.jpg" style="width: 600px; height: 359px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0756.Pyramid%20Transition%20Matrix/images/pyramid2-grid.jpg" style="width: 600px; height: 359px;" />
 <pre>
 <strong>Input:</strong> bottom = &quot;AAAA&quot;, allowed = [&quot;AAB&quot;,&quot;AAC&quot;,&quot;BCD&quot;,&quot;BBE&quot;,&quot;DEF&quot;]
 <strong>Output:</strong> false
diff --git a/solution/0700-0799/0764.Largest Plus Sign/README.md b/solution/0700-0799/0764.Largest Plus Sign/README.md
index 5db09f4768b5c..73ae728fae115 100644
--- a/solution/0700-0799/0764.Largest Plus Sign/README.md	
+++ b/solution/0700-0799/0764.Largest Plus Sign/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus1-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> n = 5, mines = [[4, 2]]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus2-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> n = 1, mines = [[0, 0]]
diff --git a/solution/0700-0799/0764.Largest Plus Sign/README_EN.md b/solution/0700-0799/0764.Largest Plus Sign/README_EN.md
index 11ba6170f602a..be48f3188220b 100644
--- a/solution/0700-0799/0764.Largest Plus Sign/README_EN.md	
+++ b/solution/0700-0799/0764.Largest Plus Sign/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus1-grid.jpg" style="width: 404px; height: 405px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus1-grid.jpg" style="width: 404px; height: 405px;" />
 <pre>
 <strong>Input:</strong> n = 5, mines = [[4,2]]
 <strong>Output:</strong> 2
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus2-grid.jpg" style="width: 84px; height: 85px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0764.Largest%20Plus%20Sign/images/plus2-grid.jpg" style="width: 84px; height: 85px;" />
 <pre>
 <strong>Input:</strong> n = 1, mines = [[0,0]]
 <strong>Output:</strong> 0
diff --git a/solution/0700-0799/0766.Toeplitz Matrix/README.md b/solution/0700-0799/0766.Toeplitz Matrix/README.md
index f6007afff750c..782a31ed10efd 100644
--- a/solution/0700-0799/0766.Toeplitz Matrix/README.md	
+++ b/solution/0700-0799/0766.Toeplitz Matrix/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex1.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex1.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,2,3,4],[5,1,2,3],[9,5,1,2]]
 <strong>输出：</strong>true
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex2.jpg" style="width: 162px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex2.jpg" style="width: 162px; height: 162px;" />
 <pre>
 <strong>输入：</strong>matrix = [[1,2],[2,2]]
 <strong>输出：</strong>false
diff --git a/solution/0700-0799/0766.Toeplitz Matrix/README_EN.md b/solution/0700-0799/0766.Toeplitz Matrix/README_EN.md
index c9b39fd484542..f03fab9c8b927 100644
--- a/solution/0700-0799/0766.Toeplitz Matrix/README_EN.md	
+++ b/solution/0700-0799/0766.Toeplitz Matrix/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex1.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex1.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3,4],[5,1,2,3],[9,5,1,2]]
 <strong>Output:</strong> true
@@ -21,7 +21,7 @@ In each diagonal all elements are the same, so the answer is True.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex2.jpg" style="width: 162px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0766.Toeplitz%20Matrix/images/ex2.jpg" style="width: 162px; height: 162px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2],[2,2]]
 <strong>Output:</strong> false
diff --git a/solution/0700-0799/0773.Sliding Puzzle/README.md b/solution/0700-0799/0773.Sliding Puzzle/README.md
index aaea7361d2ee1..91c1e0621614c 100644
--- a/solution/0700-0799/0773.Sliding Puzzle/README.md	
+++ b/solution/0700-0799/0773.Sliding Puzzle/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide1-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>board = [[1,2,3],[4,0,5]]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide2-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>board = [[1,2,3],[5,4,0]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide3-grid.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide3-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>board = [[4,1,2],[5,0,3]]
diff --git a/solution/0700-0799/0773.Sliding Puzzle/README_EN.md b/solution/0700-0799/0773.Sliding Puzzle/README_EN.md
index 3cdebd0aaa111..dbbc5049a51d0 100644
--- a/solution/0700-0799/0773.Sliding Puzzle/README_EN.md	
+++ b/solution/0700-0799/0773.Sliding Puzzle/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide1-grid.jpg" style="width: 244px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide1-grid.jpg" style="width: 244px; height: 165px;" />
 <pre>
 <strong>Input:</strong> board = [[1,2,3],[4,0,5]]
 <strong>Output:</strong> 1
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide2-grid.jpg" style="width: 244px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide2-grid.jpg" style="width: 244px; height: 165px;" />
 <pre>
 <strong>Input:</strong> board = [[1,2,3],[5,4,0]]
 <strong>Output:</strong> -1
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide3-grid.jpg" style="width: 244px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0773.Sliding%20Puzzle/images/slide3-grid.jpg" style="width: 244px; height: 165px;" />
 <pre>
 <strong>Input:</strong> board = [[4,1,2],[5,0,3]]
 <strong>Output:</strong> 5
diff --git a/solution/0700-0799/0776.Split BST/README.md b/solution/0700-0799/0776.Split BST/README.md
index 60299c6336a14..20c03b00a2ade 100644
--- a/solution/0700-0799/0776.Split BST/README.md	
+++ b/solution/0700-0799/0776.Split BST/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0776.Split%20BST/images/split-tree.jpg" style="height: 193px; width: 600px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0776.Split%20BST/images/split-tree.jpg" style="height: 193px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [4,2,6,1,3,5,7], target = 2
diff --git a/solution/0700-0799/0776.Split BST/README_EN.md b/solution/0700-0799/0776.Split BST/README_EN.md
index a686b27a271f4..6255c12111389 100644
--- a/solution/0700-0799/0776.Split BST/README_EN.md	
+++ b/solution/0700-0799/0776.Split BST/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0776.Split%20BST/images/split-tree.jpg" style="width: 600px; height: 193px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0776.Split%20BST/images/split-tree.jpg" style="width: 600px; height: 193px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,6,1,3,5,7], target = 2
 <strong>Output:</strong> [[2,1],[4,3,6,null,null,5,7]]
diff --git a/solution/0700-0799/0778.Swim in Rising Water/README.md b/solution/0700-0799/0778.Swim in Rising Water/README.md
index 44e8aab42dbb9..418f678d90051 100644
--- a/solution/0700-0799/0778.Swim in Rising Water/README.md	
+++ b/solution/0700-0799/0778.Swim in Rising Water/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim1-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> grid = [[0,2],[1,3]]
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim2-grid-1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim2-grid-1.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> grid = [[0,1,2,3,4],[24,23,22,21,5],[12,13,14,15,16],[11,17,18,19,20],[10,9,8,7,6]]
diff --git a/solution/0700-0799/0778.Swim in Rising Water/README_EN.md b/solution/0700-0799/0778.Swim in Rising Water/README_EN.md
index 5bef059aa1f19..97e5e119ddbc7 100644
--- a/solution/0700-0799/0778.Swim in Rising Water/README_EN.md	
+++ b/solution/0700-0799/0778.Swim in Rising Water/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim1-grid.jpg" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim1-grid.jpg" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,2],[1,3]]
 <strong>Output:</strong> 3
@@ -24,7 +24,7 @@ When the depth of water is 3, we can swim anywhere inside the grid.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim2-grid-1.jpg" style="width: 404px; height: 405px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0778.Swim%20in%20Rising%20Water/images/swim2-grid-1.jpg" style="width: 404px; height: 405px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,2,3,4],[24,23,22,21,5],[12,13,14,15,16],[11,17,18,19,20],[10,9,8,7,6]]
 <strong>Output:</strong> 16
diff --git a/solution/0700-0799/0782.Transform to Chessboard/README.md b/solution/0700-0799/0782.Transform to Chessboard/README.md
index f152cdbc90b28..aa5cf53534e1d 100644
--- a/solution/0700-0799/0782.Transform to Chessboard/README.md	
+++ b/solution/0700-0799/0782.Transform to Chessboard/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard1-grid.jpg" style="height: 145px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard1-grid.jpg" style="height: 145px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> board = [[0,1,1,0],[0,1,1,0],[1,0,0,1],[1,0,0,1]]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard2-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> board = [[0, 1], [1, 0]]
@@ -38,7 +38,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard3-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard3-grid.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> board = [[1, 0], [1, 0]]
diff --git a/solution/0700-0799/0782.Transform to Chessboard/README_EN.md b/solution/0700-0799/0782.Transform to Chessboard/README_EN.md
index f6a4ab3596645..9f56b0dcd9187 100644
--- a/solution/0700-0799/0782.Transform to Chessboard/README_EN.md	
+++ b/solution/0700-0799/0782.Transform to Chessboard/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard1-grid.jpg" style="width: 500px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard1-grid.jpg" style="width: 500px; height: 145px;" />
 <pre>
 <strong>Input:</strong> board = [[0,1,1,0],[0,1,1,0],[1,0,0,1],[1,0,0,1]]
 <strong>Output:</strong> 2
@@ -22,7 +22,7 @@ The second move swaps the second and third row.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard2-grid.jpg" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard2-grid.jpg" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> board = [[0,1],[1,0]]
 <strong>Output:</strong> 0
@@ -30,7 +30,7 @@ The second move swaps the second and third row.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard3-grid.jpg" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0782.Transform%20to%20Chessboard/images/chessboard3-grid.jpg" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> board = [[1,0],[1,0]]
 <strong>Output:</strong> -1
diff --git a/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README.md b/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README.md
index 3bf9f0d4973c2..031426b0c5c20 100644
--- a/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README.md	
+++ b/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README.md	
@@ -15,14 +15,14 @@
 <div class="original__bRMd">
 <div>
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst1.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst1.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [4,2,6,1,3]
 <strong>输出：</strong>1
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst2.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst2.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>输入：</strong>root = [1,0,48,null,null,12,49]
 <strong>输出：</strong>1
diff --git a/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README_EN.md b/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README_EN.md
index 9add500957860..e5615bf94147b 100644
--- a/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README_EN.md	
+++ b/solution/0700-0799/0783.Minimum Distance Between BST Nodes/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst1.jpg" style="width: 292px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst1.jpg" style="width: 292px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [4,2,6,1,3]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst2.jpg" style="width: 282px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0783.Minimum%20Distance%20Between%20BST%20Nodes/images/bst2.jpg" style="width: 282px; height: 301px;" />
 <pre>
 <strong>Input:</strong> root = [1,0,48,null,null,12,49]
 <strong>Output:</strong> 1
diff --git a/solution/0700-0799/0785.Is Graph Bipartite/README.md b/solution/0700-0799/0785.Is Graph Bipartite/README.md
index 3273921558d00..c1890fa2f5c94 100644
--- a/solution/0700-0799/0785.Is Graph Bipartite/README.md	
+++ b/solution/0700-0799/0785.Is Graph Bipartite/README.md	
@@ -22,14 +22,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi2.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi2.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>输入：</strong>graph = [[1,2,3],[0,2],[0,1,3],[0,2]]
 <strong>输出：</strong>false
 <strong>解释：</strong><code>不能将节点分割成两个独立的子集，</code>以使每条边都连通一个子集中的一个节点与另一个子集中的一个节点。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi1.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi1.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>输入：</strong>graph = [[1,3],[0,2],[1,3],[0,2]]
 <strong>输出：</strong>true
diff --git a/solution/0700-0799/0785.Is Graph Bipartite/README_EN.md b/solution/0700-0799/0785.Is Graph Bipartite/README_EN.md
index 85c37ad44f23c..2938bb4fa61b2 100644
--- a/solution/0700-0799/0785.Is Graph Bipartite/README_EN.md	
+++ b/solution/0700-0799/0785.Is Graph Bipartite/README_EN.md	
@@ -19,14 +19,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi2.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi2.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,2,3],[0,2],[0,1,3],[0,2]]
 <strong>Output:</strong> false
 <strong>Explanation:</strong> There is no way to partition the nodes into two independent sets such that every edge connects a node in one and a node in the other.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi1.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0785.Is%20Graph%20Bipartite/images/bi1.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,3],[0,2],[1,3],[0,2]]
 <strong>Output:</strong> true
diff --git a/solution/0700-0799/0787.Cheapest Flights Within K Stops/README.md b/solution/0700-0799/0787.Cheapest Flights Within K Stops/README.md
index b57062bf85583..a88da778d7235 100644
--- a/solution/0700-0799/0787.Cheapest Flights Within K Stops/README.md	
+++ b/solution/0700-0799/0787.Cheapest Flights Within K Stops/README.md	
@@ -21,7 +21,7 @@ src = 0, dst = 2, k = 1
 <strong>输出:</strong> 200
 <strong>解释:</strong> 
 城市航班图如下
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/995.png" style="height: 180px; width: 246px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/995.png" style="height: 180px; width: 246px;" />
 
 从城市 0 到城市 2 在 1 站中转以内的最便宜价格是 200，如图中红色所示。</pre>
 
@@ -34,7 +34,7 @@ src = 0, dst = 2, k = 0
 <strong>输出:</strong> 500
 <strong>解释:</strong> 
 城市航班图如下
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/995.png" style="height: 180px; width: 246px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/995.png" style="height: 180px; width: 246px;" />
 
 从城市 0 到城市 2 在 0 站中转以内的最便宜价格是 500，如图中蓝色所示。</pre>
 
diff --git a/solution/0700-0799/0787.Cheapest Flights Within K Stops/README_EN.md b/solution/0700-0799/0787.Cheapest Flights Within K Stops/README_EN.md
index b7dd87d6546ea..7058cc9446cd8 100644
--- a/solution/0700-0799/0787.Cheapest Flights Within K Stops/README_EN.md	
+++ b/solution/0700-0799/0787.Cheapest Flights Within K Stops/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-3drawio.png" style="width: 332px; height: 392px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-3drawio.png" style="width: 332px; height: 392px;" />
 <pre>
 <strong>Input:</strong> n = 4, flights = [[0,1,100],[1,2,100],[2,0,100],[1,3,600],[2,3,200]], src = 0, dst = 3, k = 1
 <strong>Output:</strong> 700
@@ -21,7 +21,7 @@ Note that the path through cities [0,1,2,3] is cheaper but is invalid because it
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-1drawio.png" style="width: 332px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-1drawio.png" style="width: 332px; height: 242px;" />
 <pre>
 <strong>Input:</strong> n = 3, flights = [[0,1,100],[1,2,100],[0,2,500]], src = 0, dst = 2, k = 1
 <strong>Output:</strong> 200
@@ -31,7 +31,7 @@ The optimal path with at most 1 stop from city 0 to 2 is marked in red and has c
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-2drawio.png" style="width: 332px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0787.Cheapest%20Flights%20Within%20K%20Stops/images/cheapest-flights-within-k-stops-2drawio.png" style="width: 332px; height: 242px;" />
 <pre>
 <strong>Input:</strong> n = 3, flights = [[0,1,100],[1,2,100],[0,2,500]], src = 0, dst = 2, k = 0
 <strong>Output:</strong> 500
diff --git a/solution/0700-0799/0790.Domino and Tromino Tiling/README.md b/solution/0700-0799/0790.Domino and Tromino Tiling/README.md
index 70eca4e9a3910..55e9fe8b4c601 100644
--- a/solution/0700-0799/0790.Domino and Tromino Tiling/README.md	
+++ b/solution/0700-0799/0790.Domino and Tromino Tiling/README.md	
@@ -8,7 +8,7 @@
 
 <p>有两种形状的瓷砖：一种是&nbsp;<code>2 x 1</code> 的多米诺形，另一种是形如&nbsp;"L" 的托米诺形。两种形状都可以旋转。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino.jpg" style="height: 195px; width: 362px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino.jpg" style="height: 195px; width: 362px;" /></p>
 
 <p>给定整数 n ，返回可以平铺&nbsp;<code>2 x n</code> 的面板的方法的数量。<strong>返回对</strong>&nbsp;<code>10<sup>9</sup>&nbsp;+ 7</code>&nbsp;<strong>取模&nbsp;</strong>的值。</p>
 
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino1.jpg" style="height: 226px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino1.jpg" style="height: 226px; width: 500px;" /></p>
 
 <pre>
 <strong>输入:</strong> n = 3
diff --git a/solution/0700-0799/0790.Domino and Tromino Tiling/README_EN.md b/solution/0700-0799/0790.Domino and Tromino Tiling/README_EN.md
index a1e18c77c8cd7..4bba24eae44fb 100644
--- a/solution/0700-0799/0790.Domino and Tromino Tiling/README_EN.md	
+++ b/solution/0700-0799/0790.Domino and Tromino Tiling/README_EN.md	
@@ -5,14 +5,14 @@
 ## Description
 
 <p>You have two types of tiles: a <code>2 x 1</code> domino shape and a tromino shape. You may rotate these shapes.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino.jpg" style="width: 362px; height: 195px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino.jpg" style="width: 362px; height: 195px;" />
 <p>Given an integer n, return <em>the number of ways to tile an</em> <code>2 x n</code> <em>board</em>. Since the answer may be very large, return it <strong>modulo</strong> <code>10<sup>9</sup> + 7</code>.</p>
 
 <p>In a tiling, every square must be covered by a tile. Two tilings are different if and only if there are two 4-directionally adjacent cells on the board such that exactly one of the tilings has both squares occupied by a tile.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino1.jpg" style="width: 500px; height: 226px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0790.Domino%20and%20Tromino%20Tiling/images/lc-domino1.jpg" style="width: 500px; height: 226px;" />
 <pre>
 <strong>Input:</strong> n = 3
 <strong>Output:</strong> 5
diff --git a/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README.md b/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README.md
index ee210376a3305..1aee8f26cf497 100644
--- a/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README.md	
+++ b/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README.md	
@@ -24,7 +24,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>board = ["O  ","   ","   "]
 <strong>输出：</strong>false
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>board = ["XOX"," X ","   "]
 <strong>输出：</strong>false
@@ -40,7 +40,7 @@
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe4-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe4-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>输入：</strong>board = ["XOX","O O","XOX"]
 <strong>输出：</strong>true
diff --git a/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README_EN.md b/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README_EN.md
index 28bd52ea23e63..853271702b2a2 100644
--- a/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README_EN.md	
+++ b/solution/0700-0799/0794.Valid Tic-Tac-Toe State/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe1-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe1-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> board = [&quot;O  &quot;,&quot;   &quot;,&quot;   &quot;]
 <strong>Output:</strong> false
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> board = [&quot;XOX&quot;,&quot; X &quot;,&quot;   &quot;]
 <strong>Output:</strong> false
@@ -37,7 +37,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe4-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0794.Valid%20Tic-Tac-Toe%20State/images/tictactoe4-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> board = [&quot;XOX&quot;,&quot;O O&quot;,&quot;XOX&quot;]
 <strong>Output:</strong> true
diff --git a/solution/0700-0799/0797.All Paths From Source to Target/README.md b/solution/0700-0799/0797.All Paths From Source to Target/README.md
index 8747118ed5df9..04062ab846088 100644
--- a/solution/0700-0799/0797.All Paths From Source to Target/README.md	
+++ b/solution/0700-0799/0797.All Paths From Source to Target/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1,2],[3],[3],[]]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_2.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[4,3,1],[3,2,4],[3],[4],[]]
diff --git a/solution/0700-0799/0797.All Paths From Source to Target/README_EN.md b/solution/0700-0799/0797.All Paths From Source to Target/README_EN.md
index e2bdbd67eaab5..5c3dde81dbb65 100644
--- a/solution/0700-0799/0797.All Paths From Source to Target/README_EN.md	
+++ b/solution/0700-0799/0797.All Paths From Source to Target/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,2],[3],[3],[]]
 <strong>Output:</strong> [[0,1,3],[0,2,3]]
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_2.jpg" style="width: 423px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0797.All%20Paths%20From%20Source%20to%20Target/images/all_2.jpg" style="width: 423px; height: 301px;" />
 <pre>
 <strong>Input:</strong> graph = [[4,3,1],[3,2,4],[3],[4],[]]
 <strong>Output:</strong> [[0,4],[0,3,4],[0,1,3,4],[0,1,2,3,4],[0,1,4]]
diff --git a/solution/0700-0799/0799.Champagne Tower/README.md b/solution/0700-0799/0799.Champagne Tower/README.md
index 233b0488bac13..32e9441ef42f4 100644
--- a/solution/0700-0799/0799.Champagne Tower/README.md	
+++ b/solution/0700-0799/0799.Champagne Tower/README.md	
@@ -12,7 +12,7 @@
 
 <p>例如，在倾倒一杯香槟后，最顶层的玻璃杯满了。倾倒了两杯香槟后，第二层的两个玻璃杯各自盛放一半的香槟。在倒三杯香槟后，第二层的香槟满了 - 此时总共有三个满的玻璃杯。在倒第四杯后，第三层中间的玻璃杯盛放了一半的香槟，他两边的玻璃杯各自盛放了四分之一的香槟，如下图所示。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0799.Champagne%20Tower/images/tower.png" style="height: 241px; width: 350px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0799.Champagne%20Tower/images/tower.png" style="height: 241px; width: 350px;" /></p>
 
 <p>现在当倾倒了非负整数杯香槟后，返回第 <code>i</code> 行 <code>j</code>&nbsp;个玻璃杯所盛放的香槟占玻璃杯容积的比例（ <code>i</code> 和 <code>j</code>&nbsp;都从0开始）。</p>
 
diff --git a/solution/0700-0799/0799.Champagne Tower/README_EN.md b/solution/0700-0799/0799.Champagne Tower/README_EN.md
index b0e43e8e2058a..312fbd78b3327 100644
--- a/solution/0700-0799/0799.Champagne Tower/README_EN.md	
+++ b/solution/0700-0799/0799.Champagne Tower/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>For example, after one cup of champagne is poured, the top most glass is full.&nbsp; After two cups of champagne are poured, the two glasses on the second row are half full.&nbsp; After three cups of champagne are poured, those two cups become full - there are 3 full glasses total now.&nbsp; After four cups of champagne are poured, the third row has the middle glass half full, and the two outside glasses are a quarter full, as pictured below.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0799.Champagne%20Tower/images/tower.png" style="height: 241px; width: 350px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0700-0799/0799.Champagne%20Tower/images/tower.png" style="height: 241px; width: 350px;" /></p>
 
 <p>Now after pouring some non-negative integer cups of champagne, return how full the <code>j<sup>th</sup></code> glass in the <code>i<sup>th</sup></code> row is (both <code>i</code> and <code>j</code> are 0-indexed.)</p>
 
diff --git a/solution/0800-0899/0802.Find Eventual Safe States/README.md b/solution/0800-0899/0802.Find Eventual Safe States/README.md
index f2656a1f93b25..a81e5b60b5150 100644
--- a/solution/0800-0899/0802.Find Eventual Safe States/README.md	
+++ b/solution/0800-0899/0802.Find Eventual Safe States/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="Illustration of graph" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0802.Find%20Eventual%20Safe%20States/images/picture1.png" /></p>
+<p><img alt="Illustration of graph" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0802.Find%20Eventual%20Safe%20States/images/picture1.png" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1,2],[2,3],[5],[0],[5],[],[]]
diff --git a/solution/0800-0899/0802.Find Eventual Safe States/README_EN.md b/solution/0800-0899/0802.Find Eventual Safe States/README_EN.md
index 9e72850334b9f..8687b952b4acb 100644
--- a/solution/0800-0899/0802.Find Eventual Safe States/README_EN.md	
+++ b/solution/0800-0899/0802.Find Eventual Safe States/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="Illustration of graph" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0802.Find%20Eventual%20Safe%20States/images/picture1.png" style="height: 171px; width: 600px;" />
+<img alt="Illustration of graph" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0802.Find%20Eventual%20Safe%20States/images/picture1.png" style="height: 171px; width: 600px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,2],[2,3],[5],[0],[5],[],[]]
 <strong>Output:</strong> [2,4,5,6]
diff --git a/solution/0800-0899/0807.Max Increase to Keep City Skyline/README.md b/solution/0800-0899/0807.Max Increase to Keep City Skyline/README.md
index f37783bb151f5..880a658f61577 100644
--- a/solution/0800-0899/0807.Max Increase to Keep City Skyline/README.md	
+++ b/solution/0800-0899/0807.Max Increase to Keep City Skyline/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0807.Max%20Increase%20to%20Keep%20City%20Skyline/images/807-ex1.png" style="width: 700px; height: 603px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0807.Max%20Increase%20to%20Keep%20City%20Skyline/images/807-ex1.png" style="width: 700px; height: 603px;" />
 <pre>
 <strong>输入：</strong>grid = [[3,0,8,4],[2,4,5,7],[9,2,6,3],[0,3,1,0]]
 <strong>输出：</strong>35
diff --git a/solution/0800-0899/0807.Max Increase to Keep City Skyline/README_EN.md b/solution/0800-0899/0807.Max Increase to Keep City Skyline/README_EN.md
index 18ae5d02cb3ff..e182f6a66d82c 100644
--- a/solution/0800-0899/0807.Max Increase to Keep City Skyline/README_EN.md	
+++ b/solution/0800-0899/0807.Max Increase to Keep City Skyline/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0807.Max%20Increase%20to%20Keep%20City%20Skyline/images/807-ex1.png" style="width: 700px; height: 603px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0807.Max%20Increase%20to%20Keep%20City%20Skyline/images/807-ex1.png" style="width: 700px; height: 603px;" />
 <pre>
 <strong>Input:</strong> grid = [[3,0,8,4],[2,4,5,7],[9,2,6,3],[0,3,1,0]]
 <strong>Output:</strong> 35
diff --git a/solution/0800-0899/0812.Largest Triangle Area/README.md b/solution/0800-0899/0812.Largest Triangle Area/README.md
index 79349cfddf0a3..8c7a3d7d7deb7 100644
--- a/solution/0800-0899/0812.Largest Triangle Area/README.md	
+++ b/solution/0800-0899/0812.Largest Triangle Area/README.md	
@@ -16,7 +16,7 @@
 这五个点如下图所示。组成的橙色三角形是最大的，面积为2。
 </pre>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0812.Largest%20Triangle%20Area/images/1027.png" style="height:328px; width:400px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0812.Largest%20Triangle%20Area/images/1027.png" style="height:328px; width:400px" /></p>
 
 <p><strong>注意: </strong></p>
 
diff --git a/solution/0800-0899/0812.Largest Triangle Area/README_EN.md b/solution/0800-0899/0812.Largest Triangle Area/README_EN.md
index e446179698302..061ffb78a6bca 100644
--- a/solution/0800-0899/0812.Largest Triangle Area/README_EN.md	
+++ b/solution/0800-0899/0812.Largest Triangle Area/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0812.Largest%20Triangle%20Area/images/1027.png" style="height: 369px; width: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0812.Largest%20Triangle%20Area/images/1027.png" style="height: 369px; width: 450px;" />
 <pre>
 <strong>Input:</strong> points = [[0,0],[0,1],[1,0],[0,2],[2,0]]
 <strong>Output:</strong> 2.00000
diff --git a/solution/0800-0899/0814.Binary Tree Pruning/README.md b/solution/0800-0899/0814.Binary Tree Pruning/README.md
index 149d08ac9a3c5..4f16617edf8a1 100644
--- a/solution/0800-0899/0814.Binary Tree Pruning/README.md	
+++ b/solution/0800-0899/0814.Binary Tree Pruning/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_2.png" style="width: 500px; height: 140px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_2.png" style="width: 500px; height: 140px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,0,0,1]
 <strong>输出：</strong>[1,null,0,null,1]
@@ -24,14 +24,14 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_1.png" style="width: 500px; height: 115px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_1.png" style="width: 500px; height: 115px;" />
 <pre>
 <strong>输入：</strong>root = [1,0,1,0,0,0,1]
 <strong>输出：</strong>[1,null,1,null,1]
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028.png" style="width: 500px; height: 134px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028.png" style="width: 500px; height: 134px;" />
 <pre>
 <strong>输入：</strong>root = [1,1,0,1,1,0,1,0]
 <strong>输出：</strong>[1,1,0,1,1,null,1]
diff --git a/solution/0800-0899/0814.Binary Tree Pruning/README_EN.md b/solution/0800-0899/0814.Binary Tree Pruning/README_EN.md
index bc2283948507e..dae403268176b 100644
--- a/solution/0800-0899/0814.Binary Tree Pruning/README_EN.md	
+++ b/solution/0800-0899/0814.Binary Tree Pruning/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_2.png" style="width: 500px; height: 140px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_2.png" style="width: 500px; height: 140px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,0,0,1]
 <strong>Output:</strong> [1,null,0,null,1]
@@ -20,14 +20,14 @@ The diagram on the right represents the answer.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_1.png" style="width: 500px; height: 115px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028_1.png" style="width: 500px; height: 115px;" />
 <pre>
 <strong>Input:</strong> root = [1,0,1,0,0,0,1]
 <strong>Output:</strong> [1,null,1,null,1]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028.png" style="width: 500px; height: 134px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0814.Binary%20Tree%20Pruning/images/1028.png" style="width: 500px; height: 134px;" />
 <pre>
 <strong>Input:</strong> root = [1,1,0,1,1,0,1,0]
 <strong>Output:</strong> [1,1,0,1,1,null,1]
diff --git a/solution/0800-0899/0817.Linked List Components/README.md b/solution/0800-0899/0817.Linked List Components/README.md
index eb440fa892dae..fec90c531e00f 100644
--- a/solution/0800-0899/0817.Linked List Components/README.md	
+++ b/solution/0800-0899/0817.Linked List Components/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例&nbsp;1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom1.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> head = [0,1,2,3], nums = [0,1,3]
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong>&nbsp;</strong><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom2.jpg" /></p>
+<p><strong>&nbsp;</strong><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom2.jpg" /></p>
 
 <pre>
 <strong>输入:</strong> head = [0,1,2,3,4], nums = [0,3,1,4]
diff --git a/solution/0800-0899/0817.Linked List Components/README_EN.md b/solution/0800-0899/0817.Linked List Components/README_EN.md
index 4453d9d5c7538..443b7ada5a84d 100644
--- a/solution/0800-0899/0817.Linked List Components/README_EN.md	
+++ b/solution/0800-0899/0817.Linked List Components/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom1.jpg" style="width: 424px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom1.jpg" style="width: 424px; height: 65px;" />
 <pre>
 <strong>Input:</strong> head = [0,1,2,3], nums = [0,1,3]
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom2.jpg" style="width: 544px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0817.Linked%20List%20Components/images/lc-linkedlistcom2.jpg" style="width: 544px; height: 65px;" />
 <pre>
 <strong>Input:</strong> head = [0,1,2,3,4], nums = [0,3,1,4]
 <strong>Output:</strong> 2
diff --git a/solution/0800-0899/0833.Find And Replace in String/README.md b/solution/0800-0899/0833.Find And Replace in String/README.md
index f6e2233097036..4bedfb3a45969 100644
--- a/solution/0800-0899/0833.Find And Replace in String/README.md	
+++ b/solution/0800-0899/0833.Find And Replace in String/README.md	
@@ -32,7 +32,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex1.png" style="height: 251px; width: 411px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex1.png" style="height: 251px; width: 411px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "abcd", indexes = [0,2], sources = ["a","cd"], targets = ["eee","ffff"]
@@ -42,7 +42,7 @@
 "cd" 从 s 中的索引 2 开始，所以它被替换为 "ffff"。
 </pre>
 
-<p><strong>示例 2：</strong><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex2-1.png" style="height: 251px; width: 411px;" /></p>
+<p><strong>示例 2：</strong><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex2-1.png" style="height: 251px; width: 411px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "abcd", indexes = [0,2], sources = ["ab","ec"], targets = ["eee","ffff"]
diff --git a/solution/0800-0899/0833.Find And Replace in String/README_EN.md b/solution/0800-0899/0833.Find And Replace in String/README_EN.md
index f13ba14e30bfe..84a1b72905294 100644
--- a/solution/0800-0899/0833.Find And Replace in String/README_EN.md	
+++ b/solution/0800-0899/0833.Find And Replace in String/README_EN.md	
@@ -28,7 +28,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex1.png" style="width: 411px; height: 251px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex1.png" style="width: 411px; height: 251px;" />
 <pre>
 <strong>Input:</strong> s = &quot;abcd&quot;, indices = [0, 2], sources = [&quot;a&quot;, &quot;cd&quot;], targets = [&quot;eee&quot;, &quot;ffff&quot;]
 <strong>Output:</strong> &quot;eeebffff&quot;
@@ -38,7 +38,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex2-1.png" style="width: 411px; height: 251px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0833.Find%20And%20Replace%20in%20String/images/833-ex2-1.png" style="width: 411px; height: 251px;" />
 <pre>
 <strong>Input:</strong> s = &quot;abcd&quot;, indices = [0, 2], sources = [&quot;ab&quot;,&quot;ec&quot;], targets = [&quot;eee&quot;,&quot;ffff&quot;]
 <strong>Output:</strong> &quot;eeecd&quot;
diff --git a/solution/0800-0899/0834.Sum of Distances in Tree/README.md b/solution/0800-0899/0834.Sum of Distances in Tree/README.md
index a47457a0406d5..6acf7e9195cd6 100644
--- a/solution/0800-0899/0834.Sum of Distances in Tree/README.md	
+++ b/solution/0800-0899/0834.Sum of Distances in Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist1.jpg" /></p>
 
 <pre>
 <strong>输入: </strong>n = 6, edges = [[0,1],[0,2],[2,3],[2,4],[2,5]]
@@ -27,14 +27,14 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist2.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist2.jpg" />
 <pre>
 <strong>输入:</strong> n = 1, edges = []
 <strong>输出:</strong> [0]
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist3.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist3.jpg" />
 <pre>
 <strong>输入:</strong> n = 2, edges = [[1,0]]
 <strong>输出:</strong> [1,1]
diff --git a/solution/0800-0899/0834.Sum of Distances in Tree/README_EN.md b/solution/0800-0899/0834.Sum of Distances in Tree/README_EN.md
index 755e457b91848..3136642155979 100644
--- a/solution/0800-0899/0834.Sum of Distances in Tree/README_EN.md	
+++ b/solution/0800-0899/0834.Sum of Distances in Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist1.jpg" style="width: 304px; height: 224px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist1.jpg" style="width: 304px; height: 224px;" />
 <pre>
 <strong>Input:</strong> n = 6, edges = [[0,1],[0,2],[2,3],[2,4],[2,5]]
 <strong>Output:</strong> [8,12,6,10,10,10]
@@ -23,14 +23,14 @@ Hence, answer[0] = 8, and so on.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist2.jpg" style="width: 64px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist2.jpg" style="width: 64px; height: 65px;" />
 <pre>
 <strong>Input:</strong> n = 1, edges = []
 <strong>Output:</strong> [0]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist3.jpg" style="width: 144px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0834.Sum%20of%20Distances%20in%20Tree/images/lc-sumdist3.jpg" style="width: 144px; height: 145px;" />
 <pre>
 <strong>Input:</strong> n = 2, edges = [[1,0]]
 <strong>Output:</strong> [1,1]
diff --git a/solution/0800-0899/0835.Image Overlap/README.md b/solution/0800-0899/0835.Image Overlap/README.md
index ada196c0781e5..224a53d55cd0a 100644
--- a/solution/0800-0899/0835.Image Overlap/README.md	
+++ b/solution/0800-0899/0835.Image Overlap/README.md	
@@ -19,14 +19,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap1.jpg" style="width: 450px; height: 231px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap1.jpg" style="width: 450px; height: 231px;" />
 <pre>
 <strong>输入：</strong>img1 = [[1,1,0],[0,1,0],[0,1,0]], img2 = [[0,0,0],[0,1,1],[0,0,1]]
 <strong>输出：</strong>3
 <strong>解释：</strong>将 img1 向右移动 1 个单位，再向下移动 1 个单位。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step1.jpg" style="width: 450px; height: 105px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step1.jpg" style="width: 450px; height: 105px;" />
 两个图像都具有 <code>1</code> 的位置的数目是 3（用红色标识）。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step2.jpg" style="width: 450px; height: 231px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step2.jpg" style="width: 450px; height: 231px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/0800-0899/0835.Image Overlap/README_EN.md b/solution/0800-0899/0835.Image Overlap/README_EN.md
index accc5615edabb..1eea5661a0996 100644
--- a/solution/0800-0899/0835.Image Overlap/README_EN.md	
+++ b/solution/0800-0899/0835.Image Overlap/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap1.jpg" style="width: 450px; height: 231px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap1.jpg" style="width: 450px; height: 231px;" />
 <pre>
 <strong>Input:</strong> img1 = [[1,1,0],[0,1,0],[0,1,0]], img2 = [[0,0,0],[0,1,1],[0,0,1]]
 <strong>Output:</strong> 3
 <strong>Explanation:</strong> We translate img1 to right by 1 unit and down by 1 unit.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step1.jpg" style="width: 450px; height: 105px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step1.jpg" style="width: 450px; height: 105px;" />
 The number of positions that have a 1 in both images is 3 (shown in red).
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step2.jpg" style="width: 450px; height: 231px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0835.Image%20Overlap/images/overlap_step2.jpg" style="width: 450px; height: 231px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/0800-0899/0838.Push Dominoes/README.md b/solution/0800-0899/0838.Push Dominoes/README.md
index d4c4574d08aa8..c7905a12e5427 100644
--- a/solution/0800-0899/0838.Push Dominoes/README.md	
+++ b/solution/0800-0899/0838.Push Dominoes/README.md	
@@ -34,7 +34,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0838.Push%20Dominoes/images/domino.png" style="height: 196px; width: 512px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0838.Push%20Dominoes/images/domino.png" style="height: 196px; width: 512px;" />
 <pre>
 <strong>输入：</strong>dominoes = ".L.R...LR..L.."
 <strong>输出：</strong>"LL.RR.LLRRLL.."
diff --git a/solution/0800-0899/0838.Push Dominoes/README_EN.md b/solution/0800-0899/0838.Push Dominoes/README_EN.md
index ba6c3e7a2b5dc..a79baa4c4f9f6 100644
--- a/solution/0800-0899/0838.Push Dominoes/README_EN.md	
+++ b/solution/0800-0899/0838.Push Dominoes/README_EN.md	
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0838.Push%20Dominoes/images/domino.png" style="height: 196px; width: 512px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0838.Push%20Dominoes/images/domino.png" style="height: 196px; width: 512px;" />
 <pre>
 <strong>Input:</strong> dominoes = &quot;.L.R...LR..L..&quot;
 <strong>Output:</strong> &quot;LL.RR.LLRRLL..&quot;
diff --git a/solution/0800-0899/0840.Magic Squares In Grid/README.md b/solution/0800-0899/0840.Magic Squares In Grid/README.md
index b6ab85a5941ee..e5a37b0e93c13 100644
--- a/solution/0800-0899/0840.Magic Squares In Grid/README.md	
+++ b/solution/0800-0899/0840.Magic Squares In Grid/README.md	
@@ -14,16 +14,16 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_main.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_main.jpg" /></p>
 
 <pre>
 <strong>输入: </strong>grid = [[4,3,8,4],[9,5,1,9],[2,7,6,2]
 <strong>输出: </strong>1
 <strong>解释: </strong>
 下面的子矩阵是一个 3 x 3 的幻方：
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_valid.jpg" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_valid.jpg" />
 而这一个不是：
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_invalid.jpg" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_invalid.jpg" />
 总的来说，在本示例所给定的矩阵中只有一个 3 x 3 的幻方子矩阵。
 </pre>
 
diff --git a/solution/0800-0899/0840.Magic Squares In Grid/README_EN.md b/solution/0800-0899/0840.Magic Squares In Grid/README_EN.md
index fcf16634344fb..e90449d744658 100644
--- a/solution/0800-0899/0840.Magic Squares In Grid/README_EN.md	
+++ b/solution/0800-0899/0840.Magic Squares In Grid/README_EN.md	
@@ -10,15 +10,15 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_main.jpg" style="width: 322px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_main.jpg" style="width: 322px; height: 242px;" />
 <pre>
 <strong>Input:</strong> grid = [[4,3,8,4],[9,5,1,9],[2,7,6,2]]
 <strong>Output:</strong> 1
 <strong>Explanation: </strong>
 The following subgrid is a 3 x 3 magic square:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_valid.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_valid.jpg" style="width: 242px; height: 242px;" />
 while this one is not:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_invalid.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0840.Magic%20Squares%20In%20Grid/images/magic_invalid.jpg" style="width: 242px; height: 242px;" />
 In total, there is only one magic square inside the given grid.
 </pre>
 
diff --git a/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README.md b/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README.md
index e16e7d6b19c82..332a2f2caa78f 100644
--- a/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README.md	
+++ b/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README.md	
@@ -18,7 +18,7 @@
 </ol>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest1-graph.jpg" style="width: 222px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest1-graph.jpg" style="width: 222px; height: 183px;" />
 <pre>
 <strong>输入：</strong>graph = [[1,2,3],[0],[0],[0]]
 <strong>输出：</strong>4
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest2-graph.jpg" style="width: 382px; height: 222px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest2-graph.jpg" style="width: 382px; height: 222px;" /></p>
 
 <pre>
 <strong>输入：</strong>graph = [[1],[0,2,4],[1,3,4],[2],[1,2]]
diff --git a/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README_EN.md b/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README_EN.md
index d0c6f1d20e8d8..366aa2c33301c 100644
--- a/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README_EN.md	
+++ b/solution/0800-0899/0847.Shortest Path Visiting All Nodes/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest1-graph.jpg" style="width: 222px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest1-graph.jpg" style="width: 222px; height: 183px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,2,3],[0],[0],[0]]
 <strong>Output:</strong> 4
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest2-graph.jpg" style="width: 382px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0847.Shortest%20Path%20Visiting%20All%20Nodes/images/shortest2-graph.jpg" style="width: 382px; height: 222px;" />
 <pre>
 <strong>Input:</strong> graph = [[1],[0,2,4],[1,3,4],[2],[1,2]]
 <strong>Output:</strong> 4
diff --git a/solution/0800-0899/0849.Maximize Distance to Closest Person/README.md b/solution/0800-0899/0849.Maximize Distance to Closest Person/README.md
index cab3699422328..df5d60e87f19a 100644
--- a/solution/0800-0899/0849.Maximize Distance to Closest Person/README.md	
+++ b/solution/0800-0899/0849.Maximize Distance to Closest Person/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0849.Maximize%20Distance%20to%20Closest%20Person/images/distance.jpg" style="width: 650px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0849.Maximize%20Distance%20to%20Closest%20Person/images/distance.jpg" style="width: 650px; height: 257px;" />
 <pre>
 <strong>输入：</strong>seats = [1,0,0,0,1,0,1]
 <strong>输出：</strong>2
diff --git a/solution/0800-0899/0849.Maximize Distance to Closest Person/README_EN.md b/solution/0800-0899/0849.Maximize Distance to Closest Person/README_EN.md
index a59bcdd22e6da..27638b1db758a 100644
--- a/solution/0800-0899/0849.Maximize Distance to Closest Person/README_EN.md	
+++ b/solution/0800-0899/0849.Maximize Distance to Closest Person/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0849.Maximize%20Distance%20to%20Closest%20Person/images/distance.jpg" style="width: 650px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0849.Maximize%20Distance%20to%20Closest%20Person/images/distance.jpg" style="width: 650px; height: 257px;" />
 <pre>
 <strong>Input:</strong> seats = [1,0,0,0,1,0,1]
 <strong>Output:</strong> 2
diff --git a/solution/0800-0899/0850.Rectangle Area II/README.md b/solution/0800-0899/0850.Rectangle Area II/README.md
index 04fd65c613fb6..411ee9c3cbc7f 100644
--- a/solution/0800-0899/0850.Rectangle Area II/README.md	
+++ b/solution/0800-0899/0850.Rectangle Area II/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0850.Rectangle%20Area%20II/images/rectangle_area_ii_pic.png" style="height: 300px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0850.Rectangle%20Area%20II/images/rectangle_area_ii_pic.png" style="height: 300px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>rectangles = [[0,0,2,2],[1,0,2,3],[1,0,3,1]]
diff --git a/solution/0800-0899/0850.Rectangle Area II/README_EN.md b/solution/0800-0899/0850.Rectangle Area II/README_EN.md
index 024805d69e471..f0ec94c601766 100644
--- a/solution/0800-0899/0850.Rectangle Area II/README_EN.md	
+++ b/solution/0800-0899/0850.Rectangle Area II/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0850.Rectangle%20Area%20II/images/rectangle_area_ii_pic.png" style="width: 600px; height: 450px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0850.Rectangle%20Area%20II/images/rectangle_area_ii_pic.png" style="width: 600px; height: 450px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[0,0,2,2],[1,0,2,3],[1,0,3,1]]
 <strong>Output:</strong> 6
diff --git a/solution/0800-0899/0858.Mirror Reflection/README.md b/solution/0800-0899/0858.Mirror Reflection/README.md
index 60281057cb66b..143e04d401125 100644
--- a/solution/0800-0899/0858.Mirror Reflection/README.md	
+++ b/solution/0800-0899/0858.Mirror Reflection/README.md	
@@ -20,7 +20,7 @@
 <strong>输入： </strong>p = 2, q = 1
 <strong>输出： </strong>2
 <strong>解释： </strong>这条光线在第一次被反射回左边的墙时就遇到了接收器 2 。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0858.Mirror%20Reflection/images/reflection.png" style="height: 217px; width: 218px;" /></pre>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0858.Mirror%20Reflection/images/reflection.png" style="height: 217px; width: 218px;" /></pre>
 
 <p> </p>
 
diff --git a/solution/0800-0899/0858.Mirror Reflection/README_EN.md b/solution/0800-0899/0858.Mirror Reflection/README_EN.md
index 6b394cc195d46..fe88ec0db1025 100644
--- a/solution/0800-0899/0858.Mirror Reflection/README_EN.md	
+++ b/solution/0800-0899/0858.Mirror Reflection/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0858.Mirror%20Reflection/images/reflection.png" style="width: 218px; height: 217px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0858.Mirror%20Reflection/images/reflection.png" style="width: 218px; height: 217px;" />
 <pre>
 <strong>Input:</strong> p = 2, q = 1
 <strong>Output:</strong> 2
diff --git a/solution/0800-0899/0861.Score After Flipping Matrix/README_EN.md b/solution/0800-0899/0861.Score After Flipping Matrix/README_EN.md
index dce054515d1d8..c169e3a333cf3 100644
--- a/solution/0800-0899/0861.Score After Flipping Matrix/README_EN.md	
+++ b/solution/0800-0899/0861.Score After Flipping Matrix/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0861.Score%20After%20Flipping%20Matrix/images/lc-toogle1.jpg" style="width: 500px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0861.Score%20After%20Flipping%20Matrix/images/lc-toogle1.jpg" style="width: 500px; height: 299px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,1,1],[1,0,1,0],[1,1,0,0]]
 <strong>Output:</strong> 39
diff --git a/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README.md b/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README.md
index 2851ce986eec5..a5b5f6422077e 100644
--- a/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README.md	
+++ b/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README.md	
@@ -17,7 +17,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0863.All%20Nodes%20Distance%20K%20in%20Binary%20Tree/images/sketch0.png" style="height: 429px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0863.All%20Nodes%20Distance%20K%20in%20Binary%20Tree/images/sketch0.png" style="height: 429px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], target = 5, k = 2
diff --git a/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README_EN.md b/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README_EN.md
index ce0282722ebcd..fbc302cc61979 100644
--- a/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README_EN.md	
+++ b/solution/0800-0899/0863.All Nodes Distance K in Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0863.All%20Nodes%20Distance%20K%20in%20Binary%20Tree/images/sketch0.png" style="width: 500px; height: 429px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0863.All%20Nodes%20Distance%20K%20in%20Binary%20Tree/images/sketch0.png" style="width: 500px; height: 429px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], target = 5, k = 2
 <strong>Output:</strong> [7,4,1]
diff --git a/solution/0800-0899/0864.Shortest Path to Get All Keys/README.md b/solution/0800-0899/0864.Shortest Path to Get All Keys/README.md
index 100ce0c581acc..92190f7a50af3 100644
--- a/solution/0800-0899/0864.Shortest Path to Get All Keys/README.md	
+++ b/solution/0800-0899/0864.Shortest Path to Get All Keys/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys2.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = ["@.a.#","###.#","b.A.B"]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-key2.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-key2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = ["@..aA","..B#.","....b"]
@@ -44,7 +44,7 @@
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys3.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys3.jpg" />
 <pre>
 <strong>输入:</strong> grid = ["@Aa"]
 <strong>输出:</strong> -1</pre>
diff --git a/solution/0800-0899/0864.Shortest Path to Get All Keys/README_EN.md b/solution/0800-0899/0864.Shortest Path to Get All Keys/README_EN.md
index cc54c4a0e54d5..7ab0a0eff5348 100644
--- a/solution/0800-0899/0864.Shortest Path to Get All Keys/README_EN.md	
+++ b/solution/0800-0899/0864.Shortest Path to Get All Keys/README_EN.md	
@@ -24,7 +24,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys2.jpg" style="width: 404px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys2.jpg" style="width: 404px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;@.a.#&quot;,&quot;###.#&quot;,&quot;b.A.B&quot;]
 <strong>Output:</strong> 8
@@ -32,14 +32,14 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-key2.jpg" style="width: 404px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-key2.jpg" style="width: 404px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;@..aA&quot;,&quot;..B#.&quot;,&quot;....b&quot;]
 <strong>Output:</strong> 6
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys3.jpg" style="width: 244px; height: 85px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0864.Shortest%20Path%20to%20Get%20All%20Keys/images/lc-keys3.jpg" style="width: 244px; height: 85px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;@Aa&quot;]
 <strong>Output:</strong> -1
diff --git a/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README.md b/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README.md
index ec41999bdacb3..2d23902e15dfe 100644
--- a/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README.md	
+++ b/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0865.Smallest%20Subtree%20with%20all%20the%20Deepest%20Nodes/images/sketch1.png" style="width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0865.Smallest%20Subtree%20with%20all%20the%20Deepest%20Nodes/images/sketch1.png" style="width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4]
diff --git a/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README_EN.md b/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README_EN.md
index d5b53690e6e7b..2f41378384853 100644
--- a/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README_EN.md	
+++ b/solution/0800-0899/0865.Smallest Subtree with all the Deepest Nodes/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0865.Smallest%20Subtree%20with%20all%20the%20Deepest%20Nodes/images/sketch1.png" style="width: 600px; height: 510px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0865.Smallest%20Subtree%20with%20all%20the%20Deepest%20Nodes/images/sketch1.png" style="width: 600px; height: 510px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4]
 <strong>Output:</strong> [2,7,4]
diff --git a/solution/0800-0899/0867.Transpose Matrix/README.md b/solution/0800-0899/0867.Transpose Matrix/README.md
index bddbcfb9448b0..60ee645a5264e 100644
--- a/solution/0800-0899/0867.Transpose Matrix/README.md	
+++ b/solution/0800-0899/0867.Transpose Matrix/README.md	
@@ -10,7 +10,7 @@
 
 <p>矩阵的 <strong>转置</strong> 是指将矩阵的主对角线翻转，交换矩阵的行索引与列索引。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0867.Transpose%20Matrix/images/hint_transpose.png" style="width: 600px; height: 197px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0867.Transpose%20Matrix/images/hint_transpose.png" style="width: 600px; height: 197px;" /></p>
 
 <p> </p>
 
diff --git a/solution/0800-0899/0867.Transpose Matrix/README_EN.md b/solution/0800-0899/0867.Transpose Matrix/README_EN.md
index 66e46cd1aff2e..e97143d7ece46 100644
--- a/solution/0800-0899/0867.Transpose Matrix/README_EN.md	
+++ b/solution/0800-0899/0867.Transpose Matrix/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>The <strong>transpose</strong> of a matrix is the matrix flipped over its main diagonal, switching the matrix&#39;s row and column indices.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0867.Transpose%20Matrix/images/hint_transpose.png" style="width: 600px; height: 197px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0867.Transpose%20Matrix/images/hint_transpose.png" style="width: 600px; height: 197px;" /></p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
diff --git a/solution/0800-0899/0872.Leaf-Similar Trees/README.md b/solution/0800-0899/0872.Leaf-Similar Trees/README.md
index e855cd714cbc6..ce31471165450 100644
--- a/solution/0800-0899/0872.Leaf-Similar Trees/README.md	
+++ b/solution/0800-0899/0872.Leaf-Similar Trees/README.md	
@@ -8,7 +8,7 @@
 
 <p>请考虑一棵二叉树上所有的叶子，这些叶子的值按从左到右的顺序排列形成一个&nbsp;<strong>叶值序列 </strong>。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/tree.png" style="height: 336px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/tree.png" style="height: 336px; width: 400px;" /></p>
 
 <p>举个例子，如上图所示，给定一棵叶值序列为&nbsp;<code>(6, 7, 4, 9, 8)</code>&nbsp;的树。</p>
 
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-1.jpg" style="height: 237px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-1.jpg" style="height: 237px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [3,5,1,6,2,9,8,null,null,7,4], root2 = [3,5,1,6,7,4,2,null,null,null,null,null,null,9,8]
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-2.jpg" style="height: 110px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-2.jpg" style="height: 110px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [1,2,3], root2 = [1,3,2]
diff --git a/solution/0800-0899/0872.Leaf-Similar Trees/README_EN.md b/solution/0800-0899/0872.Leaf-Similar Trees/README_EN.md
index eb71ca017b838..53861472a9e16 100644
--- a/solution/0800-0899/0872.Leaf-Similar Trees/README_EN.md	
+++ b/solution/0800-0899/0872.Leaf-Similar Trees/README_EN.md	
@@ -6,7 +6,7 @@
 
 <p>Consider all the leaves of a binary tree, from&nbsp;left to right order, the values of those&nbsp;leaves form a <strong>leaf value sequence</strong><em>.</em></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/tree.png" style="width: 400px; height: 336px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/tree.png" style="width: 400px; height: 336px;" /></p>
 
 <p>For example, in the given tree above, the leaf value sequence is <code>(6, 7, 4, 9, 8)</code>.</p>
 
@@ -16,14 +16,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-1.jpg" style="width: 600px; height: 237px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-1.jpg" style="width: 600px; height: 237px;" />
 <pre>
 <strong>Input:</strong> root1 = [3,5,1,6,2,9,8,null,null,7,4], root2 = [3,5,1,6,7,4,2,null,null,null,null,null,null,9,8]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-2.jpg" style="width: 300px; height: 110px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0872.Leaf-Similar%20Trees/images/leaf-similar-2.jpg" style="width: 300px; height: 110px;" />
 <pre>
 <strong>Input:</strong> root1 = [1,2,3], root2 = [1,3,2]
 <strong>Output:</strong> false
diff --git a/solution/0800-0899/0876.Middle of the Linked List/README_EN.md b/solution/0800-0899/0876.Middle of the Linked List/README_EN.md
index fcc6c73cfb6e1..db3cd037d9058 100644
--- a/solution/0800-0899/0876.Middle of the Linked List/README_EN.md	
+++ b/solution/0800-0899/0876.Middle of the Linked List/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0876.Middle%20of%20the%20Linked%20List/images/lc-midlist1.jpg" style="width: 544px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0876.Middle%20of%20the%20Linked%20List/images/lc-midlist1.jpg" style="width: 544px; height: 65px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5]
 <strong>Output:</strong> [3,4,5]
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0876.Middle%20of%20the%20Linked%20List/images/lc-midlist2.jpg" style="width: 664px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0876.Middle%20of%20the%20Linked%20List/images/lc-midlist2.jpg" style="width: 664px; height: 65px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5,6]
 <strong>Output:</strong> [4,5,6]
diff --git a/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README.md b/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README.md
index 8a470e01d7c99..3974f5524fa31 100644
--- a/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README.md	
+++ b/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0882.Reachable%20Nodes%20In%20Subdivided%20Graph/images/origfinal.png" style="height: 247px; width: 600px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0882.Reachable%20Nodes%20In%20Subdivided%20Graph/images/origfinal.png" style="height: 247px; width: 600px;" />
 <pre>
 <strong>输入：</strong>edges = [[0,1,10],[0,2,1],[1,2,2]], maxMoves = 6, n = 3
 <strong>输出：</strong>13
diff --git a/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README_EN.md b/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README_EN.md
index 7c18a210e17c4..f1c745f623776 100644
--- a/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README_EN.md	
+++ b/solution/0800-0899/0882.Reachable Nodes In Subdivided Graph/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0882.Reachable%20Nodes%20In%20Subdivided%20Graph/images/origfinal.png" style="width: 600px; height: 247px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0882.Reachable%20Nodes%20In%20Subdivided%20Graph/images/origfinal.png" style="width: 600px; height: 247px;" />
 <pre>
 <strong>Input:</strong> edges = [[0,1,10],[0,2,1],[1,2,2]], maxMoves = 6, n = 3
 <strong>Output:</strong> 13
diff --git a/solution/0800-0899/0883.Projection Area of 3D Shapes/README.md b/solution/0800-0899/0883.Projection Area of 3D Shapes/README.md
index 21a5a02332375..f09a9970699ca 100644
--- a/solution/0800-0899/0883.Projection Area of 3D Shapes/README.md	
+++ b/solution/0800-0899/0883.Projection Area of 3D Shapes/README.md	
@@ -32,7 +32,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0883.Projection%20Area%20of%203D%20Shapes/images/shadow.png" style="height: 214px; width: 800px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0883.Projection%20Area%20of%203D%20Shapes/images/shadow.png" style="height: 214px; width: 800px;" /></p>
 
 <pre>
 <strong>输入：</strong>[[1,2],[3,4]]
diff --git a/solution/0800-0899/0883.Projection Area of 3D Shapes/README_EN.md b/solution/0800-0899/0883.Projection Area of 3D Shapes/README_EN.md
index bcbc8f37c28a2..37281eadf44b7 100644
--- a/solution/0800-0899/0883.Projection Area of 3D Shapes/README_EN.md	
+++ b/solution/0800-0899/0883.Projection Area of 3D Shapes/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0883.Projection%20Area%20of%203D%20Shapes/images/shadow.png" style="width: 800px; height: 214px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0883.Projection%20Area%20of%203D%20Shapes/images/shadow.png" style="width: 800px; height: 214px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2],[3,4]]
 <strong>Output:</strong> 17
diff --git a/solution/0800-0899/0885.Spiral Matrix III/README.md b/solution/0800-0899/0885.Spiral Matrix III/README.md
index 58aee98c7b318..3173cd5e821c2 100644
--- a/solution/0800-0899/0885.Spiral Matrix III/README.md	
+++ b/solution/0800-0899/0885.Spiral Matrix III/README.md	
@@ -25,7 +25,7 @@
 <pre><strong>输入：</strong>R = 1, C = 4, r0 = 0, c0 = 0
 <strong>输出：</strong>[[0,0],[0,1],[0,2],[0,3]]
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_1.png" style="height: 99px; width: 174px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_1.png" style="height: 99px; width: 174px;">
 </pre>
 
 <p>&nbsp;</p>
@@ -35,7 +35,7 @@
 <pre><strong>输入：</strong>R = 5, C = 6, r0 = 1, c0 = 4
 <strong>输出：</strong>[[1,4],[1,5],[2,5],[2,4],[2,3],[1,3],[0,3],[0,4],[0,5],[3,5],[3,4],[3,3],[3,2],[2,2],[1,2],[0,2],[4,5],[4,4],[4,3],[4,2],[4,1],[3,1],[2,1],[1,1],[0,1],[4,0],[3,0],[2,0],[1,0],[0,0]]
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_2.png" style="height: 142px; width: 202px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_2.png" style="height: 142px; width: 202px;">
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0800-0899/0885.Spiral Matrix III/README_EN.md b/solution/0800-0899/0885.Spiral Matrix III/README_EN.md
index 00358ece8563e..bcead20dbcf3e 100644
--- a/solution/0800-0899/0885.Spiral Matrix III/README_EN.md	
+++ b/solution/0800-0899/0885.Spiral Matrix III/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_1.png" style="width: 174px; height: 99px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_1.png" style="width: 174px; height: 99px;" />
 <pre>
 <strong>Input:</strong> rows = 1, cols = 4, rStart = 0, cStart = 0
 <strong>Output:</strong> [[0,0],[0,1],[0,2],[0,3]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_2.png" style="width: 202px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0885.Spiral%20Matrix%20III/images/example_2.png" style="width: 202px; height: 142px;" />
 <pre>
 <strong>Input:</strong> rows = 5, cols = 6, rStart = 1, cStart = 4
 <strong>Output:</strong> [[1,4],[1,5],[2,5],[2,4],[2,3],[1,3],[0,3],[0,4],[0,5],[3,5],[3,4],[3,3],[3,2],[2,2],[1,2],[0,2],[4,5],[4,4],[4,3],[4,2],[4,1],[3,1],[2,1],[1,1],[0,1],[4,0],[3,0],[2,0],[1,0],[0,0]]
diff --git a/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README.md b/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README.md
index 3c191c649540e..c032f2fa644fa 100644
--- a/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README.md	
+++ b/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0889.Construct%20Binary%20Tree%20from%20Preorder%20and%20Postorder%20Traversal/images/lc-prepost.jpg" style="height: 265px; width: 304px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0889.Construct%20Binary%20Tree%20from%20Preorder%20and%20Postorder%20Traversal/images/lc-prepost.jpg" style="height: 265px; width: 304px;" /></p>
 
 <pre>
 <strong>输入：</strong>preorder = [1,2,4,5,3,6,7], postorder = [4,5,2,6,7,3,1]
diff --git a/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README_EN.md b/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README_EN.md
index 3446fc5273e9a..264e2a1393646 100644
--- a/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README_EN.md	
+++ b/solution/0800-0899/0889.Construct Binary Tree from Preorder and Postorder Traversal/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0889.Construct%20Binary%20Tree%20from%20Preorder%20and%20Postorder%20Traversal/images/lc-prepost.jpg" style="width: 304px; height: 265px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0889.Construct%20Binary%20Tree%20from%20Preorder%20and%20Postorder%20Traversal/images/lc-prepost.jpg" style="width: 304px; height: 265px;" />
 <pre>
 <strong>Input:</strong> preorder = [1,2,4,5,3,6,7], postorder = [4,5,2,6,7,3,1]
 <strong>Output:</strong> [1,2,3,4,5,6,7]
diff --git a/solution/0800-0899/0892.Surface Area of 3D Shapes/README.md b/solution/0800-0899/0892.Surface Area of 3D Shapes/README.md
index a8bcb86a89037..6d7131984fcea 100644
--- a/solution/0800-0899/0892.Surface Area of 3D Shapes/README.md	
+++ b/solution/0800-0899/0892.Surface Area of 3D Shapes/README.md	
@@ -20,21 +20,21 @@
 </ul>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid2.jpg" style="height: 80px; width: 80px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid2.jpg" style="height: 80px; width: 80px;" />
 <pre>
 <strong>输入：</strong>grid = [[1,2],[3,4]]
 <strong>输出：</strong>34
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid4.jpg" style="height: 100px; width: 100px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid4.jpg" style="height: 100px; width: 100px;" />
 <pre>
 <strong>输入：</strong>grid = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>输出：</strong>32
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid5.jpg" style="height: 100px; width: 100px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid5.jpg" style="height: 100px; width: 100px;" />
 <pre>
 <strong>输入：</strong>grid = [[2,2,2],[2,1,2],[2,2,2]]
 <strong>输出：</strong>46
diff --git a/solution/0800-0899/0892.Surface Area of 3D Shapes/README_EN.md b/solution/0800-0899/0892.Surface Area of 3D Shapes/README_EN.md
index e848e027ee8fb..6c4a9a9a27c50 100644
--- a/solution/0800-0899/0892.Surface Area of 3D Shapes/README_EN.md	
+++ b/solution/0800-0899/0892.Surface Area of 3D Shapes/README_EN.md	
@@ -14,21 +14,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid2.jpg" style="width: 162px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid2.jpg" style="width: 162px; height: 162px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2],[3,4]]
 <strong>Output:</strong> 34
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid4.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid4.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[1,0,1],[1,1,1]]
 <strong>Output:</strong> 32
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid5.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0892.Surface%20Area%20of%203D%20Shapes/images/tmp-grid5.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,2,2],[2,1,2],[2,2,2]]
 <strong>Output:</strong> 46
diff --git a/solution/0800-0899/0894.All Possible Full Binary Trees/README.md b/solution/0800-0899/0894.All Possible Full Binary Trees/README.md
index b452477cbab15..748bd0534f0ce 100644
--- a/solution/0800-0899/0894.All Possible Full Binary Trees/README.md	
+++ b/solution/0800-0899/0894.All Possible Full Binary Trees/README.md	
@@ -21,7 +21,7 @@
 <pre><strong>输入：</strong>7
 <strong>输出：</strong>[[0,0,0,null,null,0,0,null,null,0,0],[0,0,0,null,null,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,null,null,null,null,0,0],[0,0,0,0,0,null,null,0,0]]
 <strong>解释：</strong>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0894.All%20Possible%20Full%20Binary%20Trees/images/fivetrees.png" style="height: 400px; width: 700px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0894.All%20Possible%20Full%20Binary%20Trees/images/fivetrees.png" style="height: 400px; width: 700px;">
 </pre>
 
 <p>&nbsp;</p>
diff --git a/solution/0800-0899/0894.All Possible Full Binary Trees/README_EN.md b/solution/0800-0899/0894.All Possible Full Binary Trees/README_EN.md
index 4a02bee26db95..e61155f634ede 100644
--- a/solution/0800-0899/0894.All Possible Full Binary Trees/README_EN.md	
+++ b/solution/0800-0899/0894.All Possible Full Binary Trees/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0894.All%20Possible%20Full%20Binary%20Trees/images/fivetrees.png" style="width: 700px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0894.All%20Possible%20Full%20Binary%20Trees/images/fivetrees.png" style="width: 700px; height: 400px;" />
 <pre>
 <strong>Input:</strong> n = 7
 <strong>Output:</strong> [[0,0,0,null,null,0,0,null,null,0,0],[0,0,0,null,null,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,null,null,null,null,0,0],[0,0,0,0,0,null,null,0,0]]
diff --git a/solution/0800-0899/0897.Increasing Order Search Tree/README.md b/solution/0800-0899/0897.Increasing Order Search Tree/README.md
index 44f15e9742a92..fb42eb019871c 100644
--- a/solution/0800-0899/0897.Increasing Order Search Tree/README.md	
+++ b/solution/0800-0899/0897.Increasing Order Search Tree/README.md	
@@ -11,14 +11,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex1.jpg" style="height: 350px; width: 600px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex1.jpg" style="height: 350px; width: 600px;" />
 <pre>
 <strong>输入：</strong>root = [5,3,6,2,4,null,8,1,null,null,null,7,9]
 <strong>输出：</strong>[1,null,2,null,3,null,4,null,5,null,6,null,7,null,8,null,9]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex2.jpg" style="height: 114px; width: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex2.jpg" style="height: 114px; width: 300px;" />
 <pre>
 <strong>输入：</strong>root = [5,1,7]
 <strong>输出：</strong>[1,null,5,null,7]
diff --git a/solution/0800-0899/0897.Increasing Order Search Tree/README_EN.md b/solution/0800-0899/0897.Increasing Order Search Tree/README_EN.md
index c5c666ad0d258..3bec91d91115f 100644
--- a/solution/0800-0899/0897.Increasing Order Search Tree/README_EN.md	
+++ b/solution/0800-0899/0897.Increasing Order Search Tree/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex1.jpg" style="width: 600px; height: 350px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex1.jpg" style="width: 600px; height: 350px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,6,2,4,null,8,1,null,null,null,7,9]
 <strong>Output:</strong> [1,null,2,null,3,null,4,null,5,null,6,null,7,null,8,null,9]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex2.jpg" style="width: 300px; height: 114px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0800-0899/0897.Increasing%20Order%20Search%20Tree/images/ex2.jpg" style="width: 300px; height: 114px;" />
 <pre>
 <strong>Input:</strong> root = [5,1,7]
 <strong>Output:</strong> [1,null,5,null,7]
diff --git a/solution/0900-0999/0909.Snakes and Ladders/README.md b/solution/0900-0999/0909.Snakes and Ladders/README.md
index e15a36bf471c1..e4a7e37ea9720 100644
--- a/solution/0900-0999/0909.Snakes and Ladders/README.md	
+++ b/solution/0900-0999/0909.Snakes and Ladders/README.md	
@@ -36,7 +36,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0909.Snakes%20and%20Ladders/images/snakes.png" style="width: 500px; height: 394px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0909.Snakes%20and%20Ladders/images/snakes.png" style="width: 500px; height: 394px;" />
 <pre>
 <strong>输入：</strong>board = [[-1,-1,-1,-1,-1,-1],[-1,-1,-1,-1,-1,-1],[-1,-1,-1,-1,-1,-1],[-1,35,-1,-1,13,-1],[-1,-1,-1,-1,-1,-1],[-1,15,-1,-1,-1,-1]]
 <strong>输出：</strong>4
diff --git a/solution/0900-0999/0909.Snakes and Ladders/README_EN.md b/solution/0900-0999/0909.Snakes and Ladders/README_EN.md
index 3dcdcd835cfe4..f40f78c8b09af 100644
--- a/solution/0900-0999/0909.Snakes and Ladders/README_EN.md	
+++ b/solution/0900-0999/0909.Snakes and Ladders/README_EN.md	
@@ -31,7 +31,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0909.Snakes%20and%20Ladders/images/snakes.png" style="width: 500px; height: 394px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0909.Snakes%20and%20Ladders/images/snakes.png" style="width: 500px; height: 394px;" />
 <pre>
 <strong>Input:</strong> board = [[-1,-1,-1,-1,-1,-1],[-1,-1,-1,-1,-1,-1],[-1,-1,-1,-1,-1,-1],[-1,35,-1,-1,13,-1],[-1,-1,-1,-1,-1,-1],[-1,15,-1,-1,-1,-1]]
 <strong>Output:</strong> 4
diff --git a/solution/0900-0999/0913.Cat and Mouse/README.md b/solution/0900-0999/0913.Cat and Mouse/README.md
index b31b9b025c973..24e4b57dfebcc 100644
--- a/solution/0900-0999/0913.Cat and Mouse/README.md	
+++ b/solution/0900-0999/0913.Cat and Mouse/README.md	
@@ -34,14 +34,14 @@
 &nbsp;
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat1.jpg" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat1.jpg" style="width: 300px; height: 300px;" />
 <pre>
 <strong>输入：</strong>graph = [[2,5],[3],[0,4,5],[1,4,5],[2,3],[0,2,3]]
 <strong>输出：</strong>0
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat2.jpg" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat2.jpg" style="width: 200px; height: 200px;" />
 <pre>
 <strong>输入：</strong>graph = [[1,3],[0],[3],[0,2]]
 <strong>输出：</strong>1
diff --git a/solution/0900-0999/0913.Cat and Mouse/README_EN.md b/solution/0900-0999/0913.Cat and Mouse/README_EN.md
index 4244f3afe0ae3..6c410ff2a4789 100644
--- a/solution/0900-0999/0913.Cat and Mouse/README_EN.md	
+++ b/solution/0900-0999/0913.Cat and Mouse/README_EN.md	
@@ -32,14 +32,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat1.jpg" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat1.jpg" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> graph = [[2,5],[3],[0,4,5],[1,4,5],[2,3],[0,2,3]]
 <strong>Output:</strong> 0
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat2.jpg" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0913.Cat%20and%20Mouse/images/cat2.jpg" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> graph = [[1,3],[0],[3],[0,2]]
 <strong>Output:</strong> 1
diff --git a/solution/0900-0999/0919.Complete Binary Tree Inserter/README.md b/solution/0900-0999/0919.Complete Binary Tree Inserter/README.md
index ce24dd5df7a03..1af8b3bfd4ed2 100644
--- a/solution/0900-0999/0919.Complete Binary Tree Inserter/README.md	
+++ b/solution/0900-0999/0919.Complete Binary Tree Inserter/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0919.Complete%20Binary%20Tree%20Inserter/images/lc-treeinsert.jpg" style="height: 143px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0919.Complete%20Binary%20Tree%20Inserter/images/lc-treeinsert.jpg" style="height: 143px; width: 500px;" /></p>
 
 <pre>
 <strong>输入</strong>
diff --git a/solution/0900-0999/0919.Complete Binary Tree Inserter/README_EN.md b/solution/0900-0999/0919.Complete Binary Tree Inserter/README_EN.md
index 205519af81315..236583641c1cf 100644
--- a/solution/0900-0999/0919.Complete Binary Tree Inserter/README_EN.md	
+++ b/solution/0900-0999/0919.Complete Binary Tree Inserter/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0919.Complete%20Binary%20Tree%20Inserter/images/lc-treeinsert.jpg" style="width: 500px; height: 143px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0919.Complete%20Binary%20Tree%20Inserter/images/lc-treeinsert.jpg" style="width: 500px; height: 143px;" />
 <pre>
 <strong>Input</strong>
 [&quot;CBTInserter&quot;, &quot;insert&quot;, &quot;insert&quot;, &quot;get_root&quot;]
diff --git a/solution/0900-0999/0931.Minimum Falling Path Sum/README.md b/solution/0900-0999/0931.Minimum Falling Path Sum/README.md
index bbb17ec52afee..44774f050ec70 100644
--- a/solution/0900-0999/0931.Minimum Falling Path Sum/README.md	
+++ b/solution/0900-0999/0931.Minimum Falling Path Sum/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing1-grid.jpg" style="height: 500px; width: 499px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing1-grid.jpg" style="height: 500px; width: 499px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[2,1,3],[6,5,4],[7,8,9]]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing2-grid.jpg" style="height: 365px; width: 164px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing2-grid.jpg" style="height: 365px; width: 164px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[-19,57],[-40,-5]]
diff --git a/solution/0900-0999/0931.Minimum Falling Path Sum/README_EN.md b/solution/0900-0999/0931.Minimum Falling Path Sum/README_EN.md
index 7e1766d05d1af..71fe0c57eea40 100644
--- a/solution/0900-0999/0931.Minimum Falling Path Sum/README_EN.md	
+++ b/solution/0900-0999/0931.Minimum Falling Path Sum/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing1-grid.jpg" style="width: 499px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing1-grid.jpg" style="width: 499px; height: 500px;" />
 <pre>
 <strong>Input:</strong> matrix = [[2,1,3],[6,5,4],[7,8,9]]
 <strong>Output:</strong> 13
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing2-grid.jpg" style="width: 164px; height: 365px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0931.Minimum%20Falling%20Path%20Sum/images/failing2-grid.jpg" style="width: 164px; height: 365px;" />
 <pre>
 <strong>Input:</strong> matrix = [[-19,57],[-40,-5]]
 <strong>Output:</strong> -59
diff --git a/solution/0900-0999/0935.Knight Dialer/README.md b/solution/0900-0999/0935.Knight Dialer/README.md
index 9ace36d953310..ee784cc8d5f08 100644
--- a/solution/0900-0999/0935.Knight Dialer/README.md	
+++ b/solution/0900-0999/0935.Knight Dialer/README.md	
@@ -10,11 +10,11 @@
 
 <p>象棋骑士可能的移动方式如下图所示:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/chess.jpg" style="height: 200px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/chess.jpg" style="height: 200px; width: 200px;" /></p>
 
 <p>我们有一个象棋骑士和一个电话垫，如下所示，骑士<strong>只能站在一个数字单元格上</strong>(即蓝色单元格)。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/phone.jpg" style="height: 200px; width: 150px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/phone.jpg" style="height: 200px; width: 150px;" /></p>
 
 <p>给定一个整数 n，返回我们可以拨多少个长度为 n 的不同电话号码。</p>
 
diff --git a/solution/0900-0999/0935.Knight Dialer/README_EN.md b/solution/0900-0999/0935.Knight Dialer/README_EN.md
index 117bef788533d..cd7f59be445a3 100644
--- a/solution/0900-0999/0935.Knight Dialer/README_EN.md	
+++ b/solution/0900-0999/0935.Knight Dialer/README_EN.md	
@@ -7,9 +7,9 @@
 <p>The chess knight has a <strong>unique movement</strong>,&nbsp;it may move two squares vertically and one square horizontally, or two squares horizontally and one square vertically (with both forming the shape of an <strong>L</strong>). The possible movements of chess knight are shown in this diagaram:</p>
 
 <p>A chess knight can move as indicated in the chess diagram below:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/chess.jpg" style="width: 402px; height: 402px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/chess.jpg" style="width: 402px; height: 402px;" />
 <p>We have a chess knight and a phone pad as shown below, the knight <strong>can only stand on a numeric cell</strong>&nbsp;(i.e. blue cell).</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/phone.jpg" style="width: 242px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0935.Knight%20Dialer/images/phone.jpg" style="width: 242px; height: 322px;" />
 <p>Given an integer <code>n</code>, return how many distinct phone numbers of length <code>n</code> we can dial.</p>
 
 <p>You are allowed to place the knight <strong>on any numeric cell</strong> initially and then you should perform <code>n - 1</code> jumps to dial a number of length <code>n</code>. All jumps should be <strong>valid</strong> knight jumps.</p>
diff --git a/solution/0900-0999/0938.Range Sum of BST/README.md b/solution/0900-0999/0938.Range Sum of BST/README.md
index a12d11926cadf..c8461a3f1d616 100644
--- a/solution/0900-0999/0938.Range Sum of BST/README.md	
+++ b/solution/0900-0999/0938.Range Sum of BST/README.md	
@@ -11,14 +11,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst1.jpg" style="width: 400px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst1.jpg" style="width: 400px; height: 222px;" />
 <pre>
 <strong>输入：</strong>root = [10,5,15,3,7,null,18], low = 7, high = 15
 <strong>输出：</strong>32
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst2.jpg" style="width: 400px; height: 335px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst2.jpg" style="width: 400px; height: 335px;" />
 <pre>
 <strong>输入：</strong>root = [10,5,15,3,7,13,18,1,null,6], low = 6, high = 10
 <strong>输出：</strong>23
diff --git a/solution/0900-0999/0938.Range Sum of BST/README_EN.md b/solution/0900-0999/0938.Range Sum of BST/README_EN.md
index 09af55ee68b86..2be1bad6004c0 100644
--- a/solution/0900-0999/0938.Range Sum of BST/README_EN.md	
+++ b/solution/0900-0999/0938.Range Sum of BST/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst1.jpg" style="width: 400px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst1.jpg" style="width: 400px; height: 222px;" />
 <pre>
 <strong>Input:</strong> root = [10,5,15,3,7,null,18], low = 7, high = 15
 <strong>Output:</strong> 32
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst2.jpg" style="width: 400px; height: 335px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0938.Range%20Sum%20of%20BST/images/bst2.jpg" style="width: 400px; height: 335px;" />
 <pre>
 <strong>Input:</strong> root = [10,5,15,3,7,13,18,1,null,6], low = 6, high = 10
 <strong>Output:</strong> 23
diff --git a/solution/0900-0999/0939.Minimum Area Rectangle/README_EN.md b/solution/0900-0999/0939.Minimum Area Rectangle/README_EN.md
index e349b25eb4bee..2477511565fd0 100644
--- a/solution/0900-0999/0939.Minimum Area Rectangle/README_EN.md	
+++ b/solution/0900-0999/0939.Minimum Area Rectangle/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0939.Minimum%20Area%20Rectangle/images/rec1.jpg" style="width: 500px; height: 447px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0939.Minimum%20Area%20Rectangle/images/rec1.jpg" style="width: 500px; height: 447px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[1,3],[3,1],[3,3],[2,2]]
 <strong>Output:</strong> 4
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0939.Minimum%20Area%20Rectangle/images/rec2.jpg" style="width: 500px; height: 477px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0939.Minimum%20Area%20Rectangle/images/rec2.jpg" style="width: 500px; height: 477px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[1,3],[3,1],[3,3],[4,1],[4,3]]
 <strong>Output:</strong> 2
diff --git a/solution/0900-0999/0941.Valid Mountain Array/README.md b/solution/0900-0999/0941.Valid Mountain Array/README.md
index 0ae4847183453..1883874ed87c1 100644
--- a/solution/0900-0999/0941.Valid Mountain Array/README.md	
+++ b/solution/0900-0999/0941.Valid Mountain Array/README.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0941.Valid%20Mountain%20Array/images/hint_valid_mountain_array.png" style="height: 316px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0941.Valid%20Mountain%20Array/images/hint_valid_mountain_array.png" style="height: 316px; width: 500px;" /></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/0900-0999/0941.Valid Mountain Array/README_EN.md b/solution/0900-0999/0941.Valid Mountain Array/README_EN.md
index cad466906ef00..252edbcdd8695 100644
--- a/solution/0900-0999/0941.Valid Mountain Array/README_EN.md	
+++ b/solution/0900-0999/0941.Valid Mountain Array/README_EN.md	
@@ -17,7 +17,7 @@
 	</ul>
 	</li>
 </ul>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0941.Valid%20Mountain%20Array/images/hint_valid_mountain_array.png" width="500" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0941.Valid%20Mountain%20Array/images/hint_valid_mountain_array.png" width="500" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 <pre><strong>Input:</strong> arr = [2,1]
diff --git a/solution/0900-0999/0951.Flip Equivalent Binary Trees/README.md b/solution/0900-0999/0951.Flip Equivalent Binary Trees/README.md
index a9a966bcb603f..1646b882abc33 100644
--- a/solution/0900-0999/0951.Flip Equivalent Binary Trees/README.md	
+++ b/solution/0900-0999/0951.Flip Equivalent Binary Trees/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="Flipped Trees Diagram" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0951.Flip%20Equivalent%20Binary%20Trees/images/tree_ex.png" /></p>
+<p><img alt="Flipped Trees Diagram" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0951.Flip%20Equivalent%20Binary%20Trees/images/tree_ex.png" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [1,2,3,4,5,6,null,null,null,7,8], root2 = [1,3,2,null,6,4,5,null,null,null,null,8,7]
diff --git a/solution/0900-0999/0951.Flip Equivalent Binary Trees/README_EN.md b/solution/0900-0999/0951.Flip Equivalent Binary Trees/README_EN.md
index 7e4a1890abee5..1e302dccbfcf3 100644
--- a/solution/0900-0999/0951.Flip Equivalent Binary Trees/README_EN.md	
+++ b/solution/0900-0999/0951.Flip Equivalent Binary Trees/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="Flipped Trees Diagram" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0951.Flip%20Equivalent%20Binary%20Trees/images/tree_ex.png" style="width: 500px; height: 220px;" />
+<img alt="Flipped Trees Diagram" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0951.Flip%20Equivalent%20Binary%20Trees/images/tree_ex.png" style="width: 500px; height: 220px;" />
 <pre>
 <strong>Input:</strong> root1 = [1,2,3,4,5,6,null,null,null,7,8], root2 = [1,3,2,null,6,4,5,null,null,null,null,8,7]
 <strong>Output:</strong> true
diff --git a/solution/0900-0999/0952.Largest Component Size by Common Factor/README.md b/solution/0900-0999/0952.Largest Component Size by Common Factor/README.md
index de904131486ec..f958ae6b18682 100644
--- a/solution/0900-0999/0952.Largest Component Size by Common Factor/README.md	
+++ b/solution/0900-0999/0952.Largest Component Size by Common Factor/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex1.png" style="height: 97px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex1.png" style="height: 97px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>nums = [4,6,15,35]
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex2.png" style="height: 85px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex2.png" style="height: 85px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>nums = [20,50,9,63]
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex3.png" style="height: 260px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex3.png" style="height: 260px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>nums = [2,3,6,7,4,12,21,39]
diff --git a/solution/0900-0999/0952.Largest Component Size by Common Factor/README_EN.md b/solution/0900-0999/0952.Largest Component Size by Common Factor/README_EN.md
index 1e0d6f827dbfe..1e61f321b8a01 100644
--- a/solution/0900-0999/0952.Largest Component Size by Common Factor/README_EN.md	
+++ b/solution/0900-0999/0952.Largest Component Size by Common Factor/README_EN.md	
@@ -15,21 +15,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex1.png" style="width: 500px; height: 97px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex1.png" style="width: 500px; height: 97px;" />
 <pre>
 <strong>Input:</strong> nums = [4,6,15,35]
 <strong>Output:</strong> 4
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex2.png" style="width: 500px; height: 85px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex2.png" style="width: 500px; height: 85px;" />
 <pre>
 <strong>Input:</strong> nums = [20,50,9,63]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex3.png" style="width: 500px; height: 260px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0952.Largest%20Component%20Size%20by%20Common%20Factor/images/ex3.png" style="width: 500px; height: 260px;" />
 <pre>
 <strong>Input:</strong> nums = [2,3,6,7,4,12,21,39]
 <strong>Output:</strong> 8
diff --git a/solution/0900-0999/0958.Check Completeness of a Binary Tree/README.md b/solution/0900-0999/0958.Check Completeness of a Binary Tree/README.md
index 1569ee82bae01..8448d1b76edd4 100644
--- a/solution/0900-0999/0958.Check Completeness of a Binary Tree/README.md	
+++ b/solution/0900-0999/0958.Check Completeness of a Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-1.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-1.png" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,6]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-2.png" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-2.png" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,null,7]
diff --git a/solution/0900-0999/0958.Check Completeness of a Binary Tree/README_EN.md b/solution/0900-0999/0958.Check Completeness of a Binary Tree/README_EN.md
index b7b16bbc24e33..5849cd5cf4eb6 100644
--- a/solution/0900-0999/0958.Check Completeness of a Binary Tree/README_EN.md	
+++ b/solution/0900-0999/0958.Check Completeness of a Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-1.png" style="width: 180px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-1.png" style="width: 180px; height: 145px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6]
 <strong>Output:</strong> true
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-2.png" style="width: 200px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0958.Check%20Completeness%20of%20a%20Binary%20Tree/images/complete-binary-tree-2.png" style="width: 200px; height: 145px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,null,7]
 <strong>Output:</strong> false
diff --git a/solution/0900-0999/0959.Regions Cut By Slashes/README.md b/solution/0900-0999/0959.Regions Cut By Slashes/README.md
index ff8deee72917e..0605710de6d55 100644
--- a/solution/0900-0999/0959.Regions Cut By Slashes/README.md	
+++ b/solution/0900-0999/0959.Regions Cut By Slashes/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/1.png" style="height: 200px; width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/1.png" style="height: 200px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [" /","/ "]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/2.png" style="height: 198px; width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/2.png" style="height: 198px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [" /","  "]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/4.png" style="height: 200px; width: 200px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/4.png" style="height: 200px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = ["/\\","\\/"]
diff --git a/solution/0900-0999/0959.Regions Cut By Slashes/README_EN.md b/solution/0900-0999/0959.Regions Cut By Slashes/README_EN.md
index f6e81d4b7b55a..1d7740a93680c 100644
--- a/solution/0900-0999/0959.Regions Cut By Slashes/README_EN.md	
+++ b/solution/0900-0999/0959.Regions Cut By Slashes/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/1.png" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/1.png" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot; /&quot;,&quot;/ &quot;]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/2.png" style="width: 200px; height: 198px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/2.png" style="width: 200px; height: 198px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot; /&quot;,&quot;  &quot;]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/4.png" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0959.Regions%20Cut%20By%20Slashes/images/4.png" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;/\\&quot;,&quot;\\/&quot;]
 <strong>Output:</strong> 5
diff --git a/solution/0900-0999/0963.Minimum Area Rectangle II/README.md b/solution/0900-0999/0963.Minimum Area Rectangle II/README.md
index d4ae23666dfa0..6a33a37891961 100644
--- a/solution/0900-0999/0963.Minimum Area Rectangle II/README.md	
+++ b/solution/0900-0999/0963.Minimum Area Rectangle II/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/1a.png" style="height: 151px; width: 150px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/1a.png" style="height: 151px; width: 150px;"></strong></p>
 
 <pre><strong>输入：</strong>[[1,2],[2,1],[1,0],[0,1]]
 <strong>输出：</strong>2.00000
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/2.png" style="height: 94px; width: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/2.png" style="height: 94px; width: 150px;"></p>
 
 <pre><strong>输入：</strong>[[0,1],[2,1],[1,1],[1,0],[2,0]]
 <strong>输出：</strong>1.00000
@@ -31,7 +31,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/3.png" style="height: 94px; width: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/3.png" style="height: 94px; width: 150px;"></p>
 
 <pre><strong>输入：</strong>[[0,3],[1,2],[3,1],[1,3],[2,1]]
 <strong>输出：</strong>0
@@ -40,7 +40,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/4c.png" style="height: 155px; width: 160px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/4c.png" style="height: 155px; width: 160px;"></strong></p>
 
 <pre><strong>输入：</strong>[[3,1],[1,1],[0,1],[2,1],[3,3],[3,2],[0,2],[2,3]]
 <strong>输出：</strong>2.00000
diff --git a/solution/0900-0999/0963.Minimum Area Rectangle II/README_EN.md b/solution/0900-0999/0963.Minimum Area Rectangle II/README_EN.md
index a6a95238a4549..c0f3f7707480d 100644
--- a/solution/0900-0999/0963.Minimum Area Rectangle II/README_EN.md	
+++ b/solution/0900-0999/0963.Minimum Area Rectangle II/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/1a.png" style="width: 398px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/1a.png" style="width: 398px; height: 400px;" />
 <pre>
 <strong>Input:</strong> points = [[1,2],[2,1],[1,0],[0,1]]
 <strong>Output:</strong> 2.00000
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/2.png" style="width: 400px; height: 251px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/2.png" style="width: 400px; height: 251px;" />
 <pre>
 <strong>Input:</strong> points = [[0,1],[2,1],[1,1],[1,0],[2,0]]
 <strong>Output:</strong> 1.00000
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/3.png" style="width: 383px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0963.Minimum%20Area%20Rectangle%20II/images/3.png" style="width: 383px; height: 400px;" />
 <pre>
 <strong>Input:</strong> points = [[0,3],[1,2],[3,1],[1,3],[2,1]]
 <strong>Output:</strong> 0
diff --git a/solution/0900-0999/0965.Univalued Binary Tree/README.md b/solution/0900-0999/0965.Univalued Binary Tree/README.md
index afce4abf6edb9..daec571beab2d 100644
--- a/solution/0900-0999/0965.Univalued Binary Tree/README.md	
+++ b/solution/0900-0999/0965.Univalued Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/screen-shot-2018-12-25-at-50104-pm.png" style="height: 159px; width: 200px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/screen-shot-2018-12-25-at-50104-pm.png" style="height: 159px; width: 200px;"></p>
 
 <pre><strong>输入：</strong>[1,1,1,1,1,null,1]
 <strong>输出：</strong>true
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/screen-shot-2018-12-25-at-50050-pm.png" style="height: 158px; width: 200px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/screen-shot-2018-12-25-at-50050-pm.png" style="height: 158px; width: 200px;"></p>
 
 <pre><strong>输入：</strong>[2,2,2,5,2]
 <strong>输出：</strong>false
diff --git a/solution/0900-0999/0965.Univalued Binary Tree/README_EN.md b/solution/0900-0999/0965.Univalued Binary Tree/README_EN.md
index ce5bf56dad3e3..e0ea78846e6bd 100644
--- a/solution/0900-0999/0965.Univalued Binary Tree/README_EN.md	
+++ b/solution/0900-0999/0965.Univalued Binary Tree/README_EN.md	
@@ -10,14 +10,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/unival_bst_1.png" style="width: 265px; height: 172px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/unival_bst_1.png" style="width: 265px; height: 172px;" />
 <pre>
 <strong>Input:</strong> root = [1,1,1,1,1,null,1]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/unival_bst_2.png" style="width: 198px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0965.Univalued%20Binary%20Tree/images/unival_bst_2.png" style="width: 198px; height: 169px;" />
 <pre>
 <strong>Input:</strong> root = [2,2,2,5,2]
 <strong>Output:</strong> false
diff --git a/solution/0900-0999/0968.Binary Tree Cameras/README.md b/solution/0900-0999/0968.Binary Tree Cameras/README.md
index c8d370a099466..75054963296fc 100644
--- a/solution/0900-0999/0968.Binary Tree Cameras/README.md	
+++ b/solution/0900-0999/0968.Binary Tree Cameras/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_01.png" style="height: 163px; width: 138px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_01.png" style="height: 163px; width: 138px;"></p>
 
 <pre><strong>输入：</strong>[0,0,null,0,0]
 <strong>输出：</strong>1
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_02.png" style="height: 312px; width: 139px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_02.png" style="height: 312px; width: 139px;"></p>
 
 <pre><strong>输入：</strong>[0,0,null,0,null,0,null,null,0]
 <strong>输出：</strong>2
diff --git a/solution/0900-0999/0968.Binary Tree Cameras/README_EN.md b/solution/0900-0999/0968.Binary Tree Cameras/README_EN.md
index e6c3463e3baa2..2b23a7f104f54 100644
--- a/solution/0900-0999/0968.Binary Tree Cameras/README_EN.md	
+++ b/solution/0900-0999/0968.Binary Tree Cameras/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_01.png" style="width: 138px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_01.png" style="width: 138px; height: 163px;" />
 <pre>
 <strong>Input:</strong> root = [0,0,null,0,0]
 <strong>Output:</strong> 1
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_02.png" style="width: 139px; height: 312px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0968.Binary%20Tree%20Cameras/images/bst_cameras_02.png" style="width: 139px; height: 312px;" />
 <pre>
 <strong>Input:</strong> root = [0,0,null,0,null,0,null,null,0]
 <strong>Output:</strong> 2
diff --git a/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README.md b/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README.md
index fa150e127a4df..2d938ce3013bb 100644
--- a/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README.md	
+++ b/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README.md	
@@ -11,7 +11,7 @@
 <p>另给你一个由 <code>n</code> 个值组成的行程序列 <code>voyage</code> ，表示 <strong>预期</strong> 的二叉树 <a href="https://baike.baidu.com/item/%E5%85%88%E5%BA%8F%E9%81%8D%E5%8E%86/6442839?fr=aladdin" target="_blank"><strong>先序遍历</strong></a> 结果。</p>
 
 <p>通过交换节点的左右子树，可以 <strong>翻转</strong> 该二叉树中的任意节点。例，翻转节点 1 的效果如下：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/fliptree.jpg" style="width: 400px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/fliptree.jpg" style="width: 400px; height: 187px;" />
 <p>请翻转 <strong>最少 </strong>的树中节点，使二叉树的 <strong>先序遍历</strong> 与预期的遍历行程 <code>voyage</code> <strong>相匹配</strong> 。 </p>
 
 <p>如果可以，则返回 <strong>翻转的</strong> 所有节点的值的列表。你可以按任何顺序返回答案。如果不能，则返回列表 <code>[-1]</code>。</p>
@@ -19,7 +19,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-01.png" style="width: 150px; height: 205px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-01.png" style="width: 150px; height: 205px;" />
 <pre>
 <strong>输入：</strong>root = [1,2], voyage = [2,1]
 <strong>输出：</strong>[-1]
@@ -27,14 +27,14 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3], voyage = [1,3,2]
 <strong>输出：</strong>[1]
 <strong>解释：</strong>交换节点 2 和 3 来翻转节点 1 ，先序遍历可以匹配预期行程。</pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3], voyage = [1,2,3]
 <strong>输出：</strong>[]
diff --git a/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README_EN.md b/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README_EN.md
index 8c89c05602eb4..3da557ec95ff9 100644
--- a/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README_EN.md	
+++ b/solution/0900-0999/0971.Flip Binary Tree To Match Preorder Traversal/README_EN.md	
@@ -7,14 +7,14 @@
 <p>You are given the <code>root</code> of a binary tree with <code>n</code> nodes, where each node is uniquely assigned a value from <code>1</code> to <code>n</code>. You are also given a sequence of <code>n</code> values <code>voyage</code>, which is the <strong>desired</strong> <a href="https://en.wikipedia.org/wiki/Tree_traversal#Pre-order" target="_blank"><strong>pre-order traversal</strong></a> of the binary tree.</p>
 
 <p>Any node in the binary tree can be <strong>flipped</strong> by swapping its left and right subtrees. For example, flipping node 1 will have the following effect:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/fliptree.jpg" style="width: 400px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/fliptree.jpg" style="width: 400px; height: 187px;" />
 <p>Flip the <strong>smallest</strong> number of nodes so that the <strong>pre-order traversal</strong> of the tree <strong>matches</strong> <code>voyage</code>.</p>
 
 <p>Return <em>a list of the values of all <strong>flipped</strong> nodes. You may return the answer in <strong>any order</strong>. If it is <strong>impossible</strong> to flip the nodes in the tree to make the pre-order traversal match </em><code>voyage</code><em>, return the list </em><code>[-1]</code>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-01.png" style="width: 150px; height: 205px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-01.png" style="width: 150px; height: 205px;" />
 <pre>
 <strong>Input:</strong> root = [1,2], voyage = [2,1]
 <strong>Output:</strong> [-1]
@@ -22,14 +22,14 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3], voyage = [1,3,2]
 <strong>Output:</strong> [1]
 <strong>Explanation:</strong> Flipping node 1 swaps nodes 2 and 3, so the pre-order traversal matches voyage.</pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0971.Flip%20Binary%20Tree%20To%20Match%20Preorder%20Traversal/images/1219-02.png" style="width: 150px; height: 142px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3], voyage = [1,2,3]
 <strong>Output:</strong> []
diff --git a/solution/0900-0999/0973.K Closest Points to Origin/README.md b/solution/0900-0999/0973.K Closest Points to Origin/README.md
index 584ee70371e98..c85e56699d8cf 100644
--- a/solution/0900-0999/0973.K Closest Points to Origin/README.md	
+++ b/solution/0900-0999/0973.K Closest Points to Origin/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0973.K%20Closest%20Points%20to%20Origin/images/closestplane1.jpg" style="height: 400px; width: 400px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0973.K%20Closest%20Points%20to%20Origin/images/closestplane1.jpg" style="height: 400px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>points = [[1,3],[-2,2]], k = 1
diff --git a/solution/0900-0999/0973.K Closest Points to Origin/README_EN.md b/solution/0900-0999/0973.K Closest Points to Origin/README_EN.md
index cfe2c94d34bcb..dfcdd3c73b7a0 100644
--- a/solution/0900-0999/0973.K Closest Points to Origin/README_EN.md	
+++ b/solution/0900-0999/0973.K Closest Points to Origin/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0973.K%20Closest%20Points%20to%20Origin/images/closestplane1.jpg" style="width: 400px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0973.K%20Closest%20Points%20to%20Origin/images/closestplane1.jpg" style="width: 400px; height: 400px;" />
 <pre>
 <strong>Input:</strong> points = [[1,3],[-2,2]], k = 1
 <strong>Output:</strong> [[-2,2]]
diff --git a/solution/0900-0999/0979.Distribute Coins in Binary Tree/README.md b/solution/0900-0999/0979.Distribute Coins in Binary Tree/README.md
index 1d05333d72918..1581c048105b0 100644
--- a/solution/0900-0999/0979.Distribute Coins in Binary Tree/README.md	
+++ b/solution/0900-0999/0979.Distribute Coins in Binary Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree1.png" style="height: 142px; width: 150px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree1.png" style="height: 142px; width: 150px;"></strong></p>
 
 <pre><strong>输入：</strong>[3,0,0]
 <strong>输出：</strong>2
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree2.png" style="height: 142px; width: 150px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree2.png" style="height: 142px; width: 150px;"></strong></p>
 
 <pre><strong>输入：</strong>[0,3,0]
 <strong>输出：</strong>3
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree3.png" style="height: 142px; width: 150px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree3.png" style="height: 142px; width: 150px;"></strong></p>
 
 <pre><strong>输入：</strong>[1,0,2]
 <strong>输出：</strong>2
@@ -42,7 +42,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree4.png" style="height: 156px; width: 155px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree4.png" style="height: 156px; width: 155px;"></strong></p>
 
 <pre><strong>输入：</strong>[1,0,0,null,3]
 <strong>输出：</strong>4
diff --git a/solution/0900-0999/0979.Distribute Coins in Binary Tree/README_EN.md b/solution/0900-0999/0979.Distribute Coins in Binary Tree/README_EN.md
index e3b68ee81356a..4504d705be05a 100644
--- a/solution/0900-0999/0979.Distribute Coins in Binary Tree/README_EN.md	
+++ b/solution/0900-0999/0979.Distribute Coins in Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree1.png" style="width: 250px; height: 236px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree1.png" style="width: 250px; height: 236px;" />
 <pre>
 <strong>Input:</strong> root = [3,0,0]
 <strong>Output:</strong> 2
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree2.png" style="width: 250px; height: 236px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0979.Distribute%20Coins%20in%20Binary%20Tree/images/tree2.png" style="width: 250px; height: 236px;" />
 <pre>
 <strong>Input:</strong> root = [0,3,0]
 <strong>Output:</strong> 3
diff --git a/solution/0900-0999/0980.Unique Paths III/README_EN.md b/solution/0900-0999/0980.Unique Paths III/README_EN.md
index 91705224ab3e3..61e961f4f8c86 100644
--- a/solution/0900-0999/0980.Unique Paths III/README_EN.md	
+++ b/solution/0900-0999/0980.Unique Paths III/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique1.jpg" style="width: 324px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique1.jpg" style="width: 324px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0],[0,0,0,0],[0,0,2,-1]]
 <strong>Output:</strong> 2
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique2.jpg" style="width: 324px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique2.jpg" style="width: 324px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0],[0,0,0,0],[0,0,0,2]]
 <strong>Output:</strong> 4
@@ -39,7 +39,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique3-.jpg" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0980.Unique%20Paths%20III/images/lc-unique3-.jpg" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1],[2,0]]
 <strong>Output:</strong> 0
diff --git a/solution/0900-0999/0986.Interval List Intersections/README.md b/solution/0900-0999/0986.Interval List Intersections/README.md
index 8611bf24359b6..b8debac3a1e89 100644
--- a/solution/0900-0999/0986.Interval List Intersections/README.md	
+++ b/solution/0900-0999/0986.Interval List Intersections/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0986.Interval%20List%20Intersections/images/interval1.png" style="width: 700px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0986.Interval%20List%20Intersections/images/interval1.png" style="width: 700px; height: 194px;" />
 <pre>
 <strong>输入：</strong>firstList = [[0,2],[5,10],[13,23],[24,25]], secondList = [[1,5],[8,12],[15,24],[25,26]]
 <strong>输出：</strong>[[1,2],[5,5],[8,10],[15,23],[24,24],[25,25]]
diff --git a/solution/0900-0999/0986.Interval List Intersections/README_EN.md b/solution/0900-0999/0986.Interval List Intersections/README_EN.md
index 0ef8dba1dbba3..90ddadd75f763 100644
--- a/solution/0900-0999/0986.Interval List Intersections/README_EN.md	
+++ b/solution/0900-0999/0986.Interval List Intersections/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0986.Interval%20List%20Intersections/images/interval1.png" style="width: 700px; height: 194px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0986.Interval%20List%20Intersections/images/interval1.png" style="width: 700px; height: 194px;" />
 <pre>
 <strong>Input:</strong> firstList = [[0,2],[5,10],[13,23],[24,25]], secondList = [[1,5],[8,12],[15,24],[25,26]]
 <strong>Output:</strong> [[1,2],[5,5],[8,10],[15,23],[24,24],[25,25]]
diff --git a/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README.md b/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README.md
index 952b002f6669e..20be8cd208ca1 100644
--- a/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README.md	
+++ b/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree1.jpg" style="width: 431px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree1.jpg" style="width: 431px; height: 304px;" />
 <pre>
 <strong>输入：</strong>root = [3,9,20,null,null,15,7]
 <strong>输出：</strong>[[9],[3,15],[20],[7]]
@@ -28,7 +28,7 @@
 列  2 ：只有结点 7 在此列中。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree2.jpg" style="width: 512px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree2.jpg" style="width: 512px; height: 304px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,6,7]
 <strong>输出：</strong>[[4],[2],[1,5,6],[3],[7]]
@@ -43,7 +43,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree3.jpg" style="width: 512px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree3.jpg" style="width: 512px; height: 304px;" />
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,6,5,7]
 <strong>输出：</strong>[[4],[2],[1,5,6],[3],[7]]
diff --git a/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README_EN.md b/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README_EN.md
index 8e07065347f2f..814e78a2f6941 100644
--- a/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README_EN.md	
+++ b/solution/0900-0999/0987.Vertical Order Traversal of a Binary Tree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree1.jpg" style="width: 431px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree1.jpg" style="width: 431px; height: 304px;" />
 <pre>
 <strong>Input:</strong> root = [3,9,20,null,null,15,7]
 <strong>Output:</strong> [[9],[3,15],[20],[7]]
@@ -25,7 +25,7 @@ Column 1: Only node 20 is in this column.
 Column 2: Only node 7 is in this column.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree2.jpg" style="width: 512px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree2.jpg" style="width: 512px; height: 304px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,7]
 <strong>Output:</strong> [[4],[2],[1,5,6],[3],[7]]
@@ -40,7 +40,7 @@ Column 2: Only node 7 is in this column.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree3.jpg" style="width: 512px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0987.Vertical%20Order%20Traversal%20of%20a%20Binary%20Tree/images/vtree3.jpg" style="width: 512px; height: 304px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,6,5,7]
 <strong>Output:</strong> [[4],[2],[1,5,6],[3],[7]]
diff --git a/solution/0900-0999/0988.Smallest String Starting From Leaf/README.md b/solution/0900-0999/0988.Smallest String Starting From Leaf/README.md
index 2a5888656f986..4094aabb1a581 100644
--- a/solution/0900-0999/0988.Smallest String Starting From Leaf/README.md	
+++ b/solution/0900-0999/0988.Smallest String Starting From Leaf/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree1.png" style="height: 358px; width: 534px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree1.png" style="height: 358px; width: 534px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [0,1,2,3,4,3,4]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree2.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree2.png" /></p>
 
 <pre>
 <strong>输入：</strong>root = [25,1,3,1,3,0,2]
@@ -45,7 +45,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree3.png" style="height: 513px; width: 490px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree3.png" style="height: 513px; width: 490px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,2,1,null,1,0,null,0]
@@ -78,7 +78,7 @@ class Solution:
         return min(left + val, right + val)
 ```
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/image_1551131779.png" style="height: 180px; width: 172px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/image_1551131779.png" style="height: 180px; width: 172px;"></strong></p>
 
 我们举个例子来说明，对于上面这棵二叉树，正确答案应该是 "ababz"，但是我们采用以上实现方式得到的答案是 "abz"。
 
diff --git a/solution/0900-0999/0988.Smallest String Starting From Leaf/README_EN.md b/solution/0900-0999/0988.Smallest String Starting From Leaf/README_EN.md
index f9b31137e0190..31da8727ce8e0 100644
--- a/solution/0900-0999/0988.Smallest String Starting From Leaf/README_EN.md	
+++ b/solution/0900-0999/0988.Smallest String Starting From Leaf/README_EN.md	
@@ -18,21 +18,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree1.png" style="width: 534px; height: 358px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree1.png" style="width: 534px; height: 358px;" />
 <pre>
 <strong>Input:</strong> root = [0,1,2,3,4,3,4]
 <strong>Output:</strong> &quot;dba&quot;
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree2.png" style="width: 534px; height: 358px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree2.png" style="width: 534px; height: 358px;" />
 <pre>
 <strong>Input:</strong> root = [25,1,3,1,3,0,2]
 <strong>Output:</strong> &quot;adz&quot;
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree3.png" style="height: 490px; width: 468px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0988.Smallest%20String%20Starting%20From%20Leaf/images/tree3.png" style="height: 490px; width: 468px;" />
 <pre>
 <strong>Input:</strong> root = [2,2,1,null,1,0,null,0]
 <strong>Output:</strong> &quot;abc&quot;
diff --git a/solution/0900-0999/0993.Cousins in Binary Tree/README.md b/solution/0900-0999/0993.Cousins in Binary Tree/README.md
index 83e15f249bbbc..7834d28515478 100644
--- a/solution/0900-0999/0993.Cousins in Binary Tree/README.md	
+++ b/solution/0900-0999/0993.Cousins in Binary Tree/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-01.png" style="height: 160px; width: 180px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-01.png" style="height: 160px; width: 180px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4], x = 4, y = 3
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-02.png" style="height: 160px; width: 201px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-02.png" style="height: 160px; width: 201px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,4,null,5], x = 5, y = 4
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-03.png" style="height: 160px; width: 156px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-03.png" style="height: 160px; width: 156px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,4], x = 2, y = 3
diff --git a/solution/0900-0999/0993.Cousins in Binary Tree/README_EN.md b/solution/0900-0999/0993.Cousins in Binary Tree/README_EN.md
index 9b89e02d7764e..dd1e4ca2a785e 100644
--- a/solution/0900-0999/0993.Cousins in Binary Tree/README_EN.md	
+++ b/solution/0900-0999/0993.Cousins in Binary Tree/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-01.png" style="width: 304px; height: 270px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-01.png" style="width: 304px; height: 270px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4], x = 4, y = 3
 <strong>Output:</strong> false
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-02.png" style="width: 334px; height: 266px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-02.png" style="width: 334px; height: 266px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4,null,5], x = 5, y = 4
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-03.png" style="width: 267px; height: 258px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0993.Cousins%20in%20Binary%20Tree/images/q1248-03.png" style="width: 267px; height: 258px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4], x = 2, y = 3
 <strong>Output:</strong> false
diff --git a/solution/0900-0999/0994.Rotting Oranges/README.md b/solution/0900-0999/0994.Rotting Oranges/README.md
index b9f685f2b349f..e121986592b87 100644
--- a/solution/0900-0999/0994.Rotting Oranges/README.md	
+++ b/solution/0900-0999/0994.Rotting Oranges/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0994.Rotting%20Oranges/images/oranges.png" style="height: 137px; width: 650px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0994.Rotting%20Oranges/images/oranges.png" style="height: 137px; width: 650px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>grid = [[2,1,1],[1,1,0],[0,1,1]]
diff --git a/solution/0900-0999/0994.Rotting Oranges/README_EN.md b/solution/0900-0999/0994.Rotting Oranges/README_EN.md
index 78dcc22313973..c477114fd6e00 100644
--- a/solution/0900-0999/0994.Rotting Oranges/README_EN.md	
+++ b/solution/0900-0999/0994.Rotting Oranges/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0994.Rotting%20Oranges/images/oranges.png" style="width: 650px; height: 137px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0994.Rotting%20Oranges/images/oranges.png" style="width: 650px; height: 137px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,1,1],[1,1,0],[0,1,1]]
 <strong>Output:</strong> 4
diff --git a/solution/0900-0999/0998.Maximum Binary Tree II/README.md b/solution/0900-0999/0998.Maximum Binary Tree II/README.md
index f3066f761d902..1ecc2bcded195 100644
--- a/solution/0900-0999/0998.Maximum Binary Tree II/README.md	
+++ b/solution/0900-0999/0998.Maximum Binary Tree II/README.md	
@@ -30,7 +30,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-1-1.png" style="height: 160px; width: 159px;" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-1-2.png" style="height: 160px; width: 169px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-1-1.png" style="height: 160px; width: 159px;" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-1-2.png" style="height: 160px; width: 169px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [4,1,3,null,null,2], val = 5
@@ -39,7 +39,7 @@
 </pre>
 
 <p><strong>示例 2：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-2-1.png" style="height: 160px; width: 180px;" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-2-2.png" style="height: 160px; width: 214px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-2-1.png" style="height: 160px; width: 180px;" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-2-2.png" style="height: 160px; width: 214px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [5,2,4,null,1], val = 3
@@ -48,7 +48,7 @@
 </pre>
 
 <p><strong>示例 3：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-3-1.png" style="height: 160px; width: 180px;" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-3-2.png" style="height: 160px; width: 201px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-3-1.png" style="height: 160px; width: 180px;" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maximum-binary-tree-3-2.png" style="height: 160px; width: 201px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [5,2,3,null,1], val = 4
diff --git a/solution/0900-0999/0998.Maximum Binary Tree II/README_EN.md b/solution/0900-0999/0998.Maximum Binary Tree II/README_EN.md
index 7c2ca43a2d4be..4b269e6913e38 100644
--- a/solution/0900-0999/0998.Maximum Binary Tree II/README_EN.md	
+++ b/solution/0900-0999/0998.Maximum Binary Tree II/README_EN.md	
@@ -26,7 +26,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree1.jpg" style="width: 376px; height: 235px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree1.jpg" style="width: 376px; height: 235px;" />
 <pre>
 <strong>Input:</strong> root = [4,1,3,null,null,2], val = 5
 <strong>Output:</strong> [5,4,null,1,3,null,null,2]
@@ -34,7 +34,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree21.jpg" style="width: 358px; height: 156px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree21.jpg" style="width: 358px; height: 156px;" />
 <pre>
 <strong>Input:</strong> root = [5,2,4,null,1], val = 3
 <strong>Output:</strong> [5,2,4,null,1,null,3]
@@ -42,7 +42,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree3.jpg" style="width: 404px; height: 180px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0998.Maximum%20Binary%20Tree%20II/images/maxtree3.jpg" style="width: 404px; height: 180px;" />
 <pre>
 <strong>Input:</strong> root = [5,2,3,null,1], val = 4
 <strong>Output:</strong> [5,2,4,null,1,3]
diff --git a/solution/0900-0999/0999.Available Captures for Rook/README.md b/solution/0900-0999/0999.Available Captures for Rook/README.md
index 9e074b18c5caa..73824cb3c0539 100644
--- a/solution/0900-0999/0999.Available Captures for Rook/README.md	
+++ b/solution/0900-0999/0999.Available Captures for Rook/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_1_improved.png" style="height: 305px; width: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_1_improved.png" style="height: 305px; width: 300px;"></p>
 
 <pre><strong>输入：</strong>[[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;R&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>输出：</strong>3
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_2_improved.png" style="height: 306px; width: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_2_improved.png" style="height: 306px; width: 300px;"></p>
 
 <pre><strong>输入：</strong>[[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;B&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;B&quot;,&quot;R&quot;,&quot;B&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;B&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>输出：</strong>0
@@ -43,7 +43,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_3_improved.png" style="height: 305px; width: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_3_improved.png" style="height: 305px; width: 300px;"></p>
 
 <pre><strong>输入：</strong>[[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;R&quot;,&quot;.&quot;,&quot;p&quot;,&quot;B&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>输出：</strong>3
diff --git a/solution/0900-0999/0999.Available Captures for Rook/README_EN.md b/solution/0900-0999/0999.Available Captures for Rook/README_EN.md
index 1cd1389297095..cf89bd19d4c63 100644
--- a/solution/0900-0999/0999.Available Captures for Rook/README_EN.md	
+++ b/solution/0900-0999/0999.Available Captures for Rook/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_1_improved.png" style="width: 300px; height: 305px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_1_improved.png" style="width: 300px; height: 305px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;R&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>Output:</strong> 3
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_2_improved.png" style="width: 300px; height: 306px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_2_improved.png" style="width: 300px; height: 306px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;B&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;B&quot;,&quot;R&quot;,&quot;B&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;B&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>Output:</strong> 0
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_3_improved.png" style="width: 300px; height: 305px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0900-0999/0999.Available%20Captures%20for%20Rook/images/1253_example_3_improved.png" style="width: 300px; height: 305px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;p&quot;,&quot;p&quot;,&quot;.&quot;,&quot;R&quot;,&quot;.&quot;,&quot;p&quot;,&quot;B&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;p&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]]
 <strong>Output:</strong> 3
diff --git a/solution/1000-1099/1001.Grid Illumination/README.md b/solution/1000-1099/1001.Grid Illumination/README.md
index 08a8e2fd53967..23afee7bc91c1 100644
--- a/solution/1000-1099/1001.Grid Illumination/README.md	
+++ b/solution/1000-1099/1001.Grid Illumination/README.md	
@@ -19,14 +19,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_1.jpg" style="height: 209px; width: 750px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_1.jpg" style="height: 209px; width: 750px;" />
 <pre>
 <strong>输入：</strong>n = 5, lamps = [[0,0],[4,4]], queries = [[1,1],[1,0]]
 <strong>输出：</strong>[1,0]
 <strong>解释：</strong>最初所有灯都是关闭的。在执行查询之前，打开位于 [0, 0] 和 [4, 4] 的灯。第 0&nbsp;次查询检查 grid[1][1] 是否被照亮（蓝色方框）。该单元格被照亮，所以 ans[0] = 1 。然后，关闭红色方框中的所有灯。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step1.jpg" style="height: 218px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step1.jpg" style="height: 218px; width: 500px;" />
 第 1&nbsp;次查询检查 grid[1][0] 是否被照亮（蓝色方框）。该单元格没有被照亮，所以 ans[1] = 0 。然后，关闭红色矩形中的所有灯。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step2.jpg" style="height: 219px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step2.jpg" style="height: 219px; width: 500px;" />
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git a/solution/1000-1099/1001.Grid Illumination/README_EN.md b/solution/1000-1099/1001.Grid Illumination/README_EN.md
index c894cb8deae5f..742d54c692f3c 100644
--- a/solution/1000-1099/1001.Grid Illumination/README_EN.md	
+++ b/solution/1000-1099/1001.Grid Illumination/README_EN.md	
@@ -16,15 +16,15 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_1.jpg" style="width: 750px; height: 209px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_1.jpg" style="width: 750px; height: 209px;" />
 <pre>
 <strong>Input:</strong> n = 5, lamps = [[0,0],[4,4]], queries = [[1,1],[1,0]]
 <strong>Output:</strong> [1,0]
 <strong>Explanation:</strong> We have the initial grid with all lamps turned off. In the above picture we see the grid after turning on the lamp at grid[0][0] then turning on the lamp at grid[4][4].
 The 0<sup>th</sup>&nbsp;query asks if the lamp at grid[1][1] is illuminated or not (the blue square). It is illuminated, so set ans[0] = 1. Then, we turn off all lamps in the red square.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step1.jpg" style="width: 500px; height: 218px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step1.jpg" style="width: 500px; height: 218px;" />
 The 1<sup>st</sup>&nbsp;query asks if the lamp at grid[1][0] is illuminated or not (the blue square). It is not illuminated, so set ans[1] = 0. Then, we turn off all lamps in the red rectangle.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step2.jpg" style="width: 500px; height: 219px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1001.Grid%20Illumination/images/illu_step2.jpg" style="width: 500px; height: 219px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
diff --git a/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README.md b/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README.md
index 6f56944082532..40407e53323a1 100644
--- a/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README.md	
+++ b/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1007.Minimum%20Domino%20Rotations%20For%20Equal%20Row/images/domino.png" style="height: 161px; width: 200px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1007.Minimum%20Domino%20Rotations%20For%20Equal%20Row/images/domino.png" style="height: 161px; width: 200px;"></p>
 
 <pre><strong>输入：</strong>A = [2,1,2,4,2,2], B = [5,2,6,2,3,2]
 <strong>输出：</strong>2
diff --git a/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README_EN.md b/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README_EN.md
index a3b3a4cfb1f8c..b2fb081972b6b 100644
--- a/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README_EN.md	
+++ b/solution/1000-1099/1007.Minimum Domino Rotations For Equal Row/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1007.Minimum%20Domino%20Rotations%20For%20Equal%20Row/images/domino.png" style="height: 300px; width: 421px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1007.Minimum%20Domino%20Rotations%20For%20Equal%20Row/images/domino.png" style="height: 300px; width: 421px;" />
 <pre>
 <strong>Input:</strong> tops = [2,1,2,4,2,2], bottoms = [5,2,6,2,3,2]
 <strong>Output:</strong> 2
diff --git a/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README.md b/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README.md
index 2cf6db16b56f8..4e889b16374cf 100644
--- a/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README.md	
+++ b/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1008.Construct%20Binary%20Search%20Tree%20from%20Preorder%20Traversal/images/1266.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1008.Construct%20Binary%20Search%20Tree%20from%20Preorder%20Traversal/images/1266.png" /></p>
 
 <pre>
 <strong>输入：</strong>preorder = [8,5,1,7,10,12]
diff --git a/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README_EN.md b/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README_EN.md
index 198b9779f529a..b650796121b74 100644
--- a/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README_EN.md	
+++ b/solution/1000-1099/1008.Construct Binary Search Tree from Preorder Traversal/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1008.Construct%20Binary%20Search%20Tree%20from%20Preorder%20Traversal/images/1266.png" style="height: 386px; width: 590px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1008.Construct%20Binary%20Search%20Tree%20from%20Preorder%20Traversal/images/1266.png" style="height: 386px; width: 590px;" />
 <pre>
 <strong>Input:</strong> preorder = [8,5,1,7,10,12]
 <strong>Output:</strong> [8,5,10,1,7,null,12]
diff --git a/solution/1000-1099/1019.Next Greater Node In Linked List/README.md b/solution/1000-1099/1019.Next Greater Node In Linked List/README.md
index 66e7140c1af27..2fabcaff9f453 100644
--- a/solution/1000-1099/1019.Next Greater Node In Linked List/README.md	
+++ b/solution/1000-1099/1019.Next Greater Node In Linked List/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>head = [2,1,5]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext2.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>head = [2,7,4,3,5]
diff --git a/solution/1000-1099/1019.Next Greater Node In Linked List/README_EN.md b/solution/1000-1099/1019.Next Greater Node In Linked List/README_EN.md
index 37cde90441aad..d5cceb4cc1152 100644
--- a/solution/1000-1099/1019.Next Greater Node In Linked List/README_EN.md	
+++ b/solution/1000-1099/1019.Next Greater Node In Linked List/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext1.jpg" style="width: 304px; height: 133px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext1.jpg" style="width: 304px; height: 133px;" />
 <pre>
 <strong>Input:</strong> head = [2,1,5]
 <strong>Output:</strong> [5,5,0]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext2.jpg" style="width: 500px; height: 113px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1019.Next%20Greater%20Node%20In%20Linked%20List/images/linkedlistnext2.jpg" style="width: 500px; height: 113px;" />
 <pre>
 <strong>Input:</strong> head = [2,7,4,3,5]
 <strong>Output:</strong> [7,0,5,5,0]
diff --git a/solution/1000-1099/1020.Number of Enclaves/README.md b/solution/1000-1099/1020.Number of Enclaves/README.md
index 99e8d193b503b..bf2f2ab78af09 100644
--- a/solution/1000-1099/1020.Number of Enclaves/README.md	
+++ b/solution/1000-1099/1020.Number of Enclaves/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves1.jpg" style="height: 200px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves1.jpg" style="height: 200px; width: 200px;" />
 <pre>
 <strong>输入：</strong>grid = [[0,0,0,0],[1,0,1,0],[0,1,1,0],[0,0,0,0]]
 <strong>输出：</strong>3
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves2.jpg" style="height: 200px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves2.jpg" style="height: 200px; width: 200px;" />
 <pre>
 <strong>输入：</strong>grid = [[0,1,1,0],[0,0,1,0],[0,0,1,0],[0,0,0,0]]
 <strong>输出：</strong>0
diff --git a/solution/1000-1099/1020.Number of Enclaves/README_EN.md b/solution/1000-1099/1020.Number of Enclaves/README_EN.md
index 38639c31c93ea..cf8f00baff78f 100644
--- a/solution/1000-1099/1020.Number of Enclaves/README_EN.md	
+++ b/solution/1000-1099/1020.Number of Enclaves/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves1.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves1.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0,0],[1,0,1,0],[0,1,1,0],[0,0,0,0]]
 <strong>Output:</strong> 3
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves2.jpg" style="width: 333px; height: 333px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1020.Number%20of%20Enclaves/images/enclaves2.jpg" style="width: 333px; height: 333px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,1,0],[0,0,1,0],[0,0,1,0],[0,0,0,0]]
 <strong>Output:</strong> 0
diff --git a/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README.md b/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README.md
index 831b531db5468..29092606f16f2 100644
--- a/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README.md	
+++ b/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1022.Sum%20of%20Root%20To%20Leaf%20Binary%20Numbers/images/sum-of-root-to-leaf-binary-numbers.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1022.Sum%20of%20Root%20To%20Leaf%20Binary%20Numbers/images/sum-of-root-to-leaf-binary-numbers.png" />
 <pre>
 <strong>输入：</strong>root = [1,0,1,0,1,0,1]
 <strong>输出：</strong>22
diff --git a/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README_EN.md b/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README_EN.md
index f8a132cdcefe9..4bf61b9062b2f 100644
--- a/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README_EN.md	
+++ b/solution/1000-1099/1022.Sum of Root To Leaf Binary Numbers/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1022.Sum%20of%20Root%20To%20Leaf%20Binary%20Numbers/images/sum-of-root-to-leaf-binary-numbers.png" style="width: 400px; height: 263px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1022.Sum%20of%20Root%20To%20Leaf%20Binary%20Numbers/images/sum-of-root-to-leaf-binary-numbers.png" style="width: 400px; height: 263px;" />
 <pre>
 <strong>Input:</strong> root = [1,0,1,0,1,0,1]
 <strong>Output:</strong> 22
diff --git a/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README.md b/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README.md
index 99a085b106c9d..e3e5038b1c5c7 100644
--- a/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README.md	
+++ b/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree.jpg" style="width: 400px; height: 390px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree.jpg" style="width: 400px; height: 390px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [8,3,10,1,6,null,14,null,null,4,7,13]
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree-1.jpg" style="width: 250px; height: 349px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree-1.jpg" style="width: 250px; height: 349px;" />
 <pre>
 <strong>输入：</strong>root = [1,null,2,null,0,3]
 <strong>输出：</strong>3
diff --git a/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README_EN.md b/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README_EN.md
index e1577c80f8362..4e9e6dc151373 100644
--- a/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README_EN.md	
+++ b/solution/1000-1099/1026.Maximum Difference Between Node and Ancestor/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree.jpg" style="width: 400px; height: 390px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree.jpg" style="width: 400px; height: 390px;" />
 <pre>
 <strong>Input:</strong> root = [8,3,10,1,6,null,14,null,null,4,7,13]
 <strong>Output:</strong> 7
@@ -22,7 +22,7 @@
 Among all possible differences, the maximum value of 7 is obtained by |8 - 1| = 7.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree-1.jpg" style="width: 250px; height: 349px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1026.Maximum%20Difference%20Between%20Node%20and%20Ancestor/images/tmp-tree-1.jpg" style="width: 250px; height: 349px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,null,0,3]
 <strong>Output:</strong> 3
diff --git a/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README.md b/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README.md
index 83063e5061180..91840a247e85e 100644
--- a/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README.md	
+++ b/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/recover-a-tree-from-preorder-traversal.png" style="height: 200px; width: 320px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/recover-a-tree-from-preorder-traversal.png" style="height: 200px; width: 320px;"></strong></p>
 
 <pre><strong>输入：</strong>&quot;1-2--3--4-5--6--7&quot;
 <strong>输出：</strong>[1,2,5,3,4,6,7]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114101-pm.png" style="height: 250px; width: 256px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114101-pm.png" style="height: 250px; width: 256px;"></strong></p>
 
 <pre><strong>输入：</strong>&quot;1-2--3---4-5--6---7&quot;
 <strong>输出：</strong>[1,2,5,3,null,6,null,4,null,7]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114955-pm.png" style="height: 250px; width: 276px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114955-pm.png" style="height: 250px; width: 276px;"></p>
 
 <pre><strong>输入：</strong>&quot;1-401--349---90--88&quot;
 <strong>输出：</strong>[1,401,null,349,88,90]
diff --git a/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README_EN.md b/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README_EN.md
index 5ac0c1fde59e9..ff8fee330781c 100644
--- a/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README_EN.md	
+++ b/solution/1000-1099/1028.Recover a Tree From Preorder Traversal/README_EN.md	
@@ -14,21 +14,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/recover-a-tree-from-preorder-traversal.png" style="width: 320px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/recover-a-tree-from-preorder-traversal.png" style="width: 320px; height: 200px;" />
 <pre>
 <strong>Input:</strong> traversal = &quot;1-2--3--4-5--6--7&quot;
 <strong>Output:</strong> [1,2,5,3,4,6,7]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114101-pm.png" style="width: 256px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114101-pm.png" style="width: 256px; height: 250px;" />
 <pre>
 <strong>Input:</strong> traversal = &quot;1-2--3---4-5--6---7&quot;
 <strong>Output:</strong> [1,2,5,3,null,6,null,4,null,7]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114955-pm.png" style="width: 276px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1028.Recover%20a%20Tree%20From%20Preorder%20Traversal/images/screen-shot-2019-04-10-at-114955-pm.png" style="width: 276px; height: 250px;" />
 <pre>
 <strong>Input:</strong> traversal = &quot;1-401--349---90--88&quot;
 <strong>Output:</strong> [1,401,null,349,88,90]
diff --git a/solution/1000-1099/1035.Uncrossed Lines/README.md b/solution/1000-1099/1035.Uncrossed Lines/README.md
index c6e90ac3012f4..ffd5be7d8c474 100644
--- a/solution/1000-1099/1035.Uncrossed Lines/README.md	
+++ b/solution/1000-1099/1035.Uncrossed Lines/README.md	
@@ -22,7 +22,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1035.Uncrossed%20Lines/images/142.png" style="width: 400px; height: 286px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1035.Uncrossed%20Lines/images/142.png" style="width: 400px; height: 286px;" />
 <pre>
 <strong>输入：</strong>nums1 = <span id="example-input-1-1">[1,4,2]</span>, nums2 = <span id="example-input-1-2">[1,2,4]</span>
 <strong>输出：</strong><span id="example-output-1">2</span>
diff --git a/solution/1000-1099/1035.Uncrossed Lines/README_EN.md b/solution/1000-1099/1035.Uncrossed Lines/README_EN.md
index 42db8c81a0067..aa581f7265784 100644
--- a/solution/1000-1099/1035.Uncrossed Lines/README_EN.md	
+++ b/solution/1000-1099/1035.Uncrossed Lines/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1035.Uncrossed%20Lines/images/142.png" style="width: 400px; height: 286px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1035.Uncrossed%20Lines/images/142.png" style="width: 400px; height: 286px;" />
 <pre>
 <strong>Input:</strong> nums1 = [1,4,2], nums2 = [1,2,4]
 <strong>Output:</strong> 2
diff --git a/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README.md b/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README.md
index df69e8aa18cb4..e32a8fa2d68ea 100644
--- a/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README.md	
+++ b/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/images/tree.png" style="height:273px; width:400px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/images/tree.png" style="height:273px; width:400px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>[4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
diff --git a/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README_EN.md b/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README_EN.md
index db56ffdcd5591..6dcf81a9c3a96 100644
--- a/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README_EN.md	
+++ b/solution/1000-1099/1038.Binary Search Tree to Greater Sum Tree/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/images/tree.png" style="width: 400px; height: 273px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/images/tree.png" style="width: 400px; height: 273px;" />
 <pre>
 <strong>Input:</strong> root = [4,1,6,0,2,5,7,null,null,null,3,null,null,null,8]
 <strong>Output:</strong> [30,36,21,36,35,26,15,null,null,null,33,null,null,null,8]
diff --git a/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README.md b/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README.md
index 760ff691edaa2..980f7ba73dd23 100644
--- a/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README.md	
+++ b/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>values = [1,2,3]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape2.jpg" style="height: 163px; width: 446px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape2.jpg" style="height: 163px; width: 446px;" /></p>
 
 <pre>
 <strong>输入：</strong>values = [3,7,4,5]
@@ -38,7 +38,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape3.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape3.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>values = [1,3,1,4,1,5]
diff --git a/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README_EN.md b/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README_EN.md
index cff70ee92f2b7..6643009175128 100644
--- a/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README_EN.md	
+++ b/solution/1000-1099/1039.Minimum Score Triangulation of Polygon/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape1.jpg" style="width: 201px; height: 133px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape1.jpg" style="width: 201px; height: 133px;" />
 <pre>
 <strong>Input:</strong> values = [1,2,3]
 <strong>Output:</strong> 6
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape2.jpg" style="width: 446px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape2.jpg" style="width: 446px; height: 163px;" />
 <pre>
 <strong>Input:</strong> values = [3,7,4,5]
 <strong>Output:</strong> 144
@@ -29,7 +29,7 @@ The minimum score is 144.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape3.jpg" style="width: 207px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1039.Minimum%20Score%20Triangulation%20of%20Polygon/images/shape3.jpg" style="width: 207px; height: 163px;" />
 <pre>
 <strong>Input:</strong> values = [1,3,1,4,1,5]
 <strong>Output:</strong> 13
diff --git a/solution/1000-1099/1056.Confusing Number/README.md b/solution/1000-1099/1056.Confusing Number/README.md
index b3c335f3edb67..017b7a08349fd 100644
--- a/solution/1000-1099/1056.Confusing Number/README.md	
+++ b/solution/1000-1099/1056.Confusing Number/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_1.png" style="height: 90px; width: 180px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_1.png" style="height: 90px; width: 180px;"></p>
 
 <pre><strong>输入：</strong>6
 <strong>输出：</strong>true
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_2.png" style="height: 90px; width: 180px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_2.png" style="height: 90px; width: 180px;"></p>
 
 <pre><strong>输入：</strong>89
 <strong>输出：</strong>true
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_3.png" style="height: 121px; width: 301px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_3.png" style="height: 121px; width: 301px;"></p>
 
 <pre><strong>输入：</strong>11
 <strong>输出：</strong>false
@@ -50,7 +50,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_4.png" style="height: 90px; width: 180px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_4.png" style="height: 90px; width: 180px;"></p>
 
 <pre><strong>输入：</strong>25
 <strong>输出：</strong>false
diff --git a/solution/1000-1099/1056.Confusing Number/README_EN.md b/solution/1000-1099/1056.Confusing Number/README_EN.md
index 0de525df1514e..9e10be7227e42 100644
--- a/solution/1000-1099/1056.Confusing Number/README_EN.md	
+++ b/solution/1000-1099/1056.Confusing Number/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_1.png" style="width: 281px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_1.png" style="width: 281px; height: 121px;" />
 <pre>
 <strong>Input:</strong> n = 6
 <strong>Output:</strong> true
@@ -31,7 +31,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_2.png" style="width: 312px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_2.png" style="width: 312px; height: 121px;" />
 <pre>
 <strong>Input:</strong> n = 89
 <strong>Output:</strong> true
@@ -39,7 +39,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_3.png" style="width: 301px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1056.Confusing%20Number/images/1268_3.png" style="width: 301px; height: 121px;" />
 <pre>
 <strong>Input:</strong> n = 11
 <strong>Output:</strong> false
diff --git a/solution/1000-1099/1057.Campus Bikes/README.md b/solution/1000-1099/1057.Campus Bikes/README.md
index 1f191d42f0971..dc31eae7bb6b3 100644
--- a/solution/1000-1099/1057.Campus Bikes/README.md	
+++ b/solution/1000-1099/1057.Campus Bikes/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_1_v2.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_1_v2.png" /></p>
 
 <pre>
 <strong>输入：</strong>workers = [[0,0],[2,1]], bikes = [[1,2],[3,3]]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_2_v2.png" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_2_v2.png" /></p>
 
 <pre>
 <strong>输入：</strong>workers = [[0,0],[1,1],[2,0]], bikes = [[1,0],[2,2],[2,1]]
diff --git a/solution/1000-1099/1057.Campus Bikes/README_EN.md b/solution/1000-1099/1057.Campus Bikes/README_EN.md
index a2a6ec0f2d538..474b3841344a6 100644
--- a/solution/1000-1099/1057.Campus Bikes/README_EN.md	
+++ b/solution/1000-1099/1057.Campus Bikes/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_1_v2.png" style="width: 376px; height: 366px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_1_v2.png" style="width: 376px; height: 366px;" />
 <pre>
 <strong>Input:</strong> workers = [[0,0],[2,1]], bikes = [[1,2],[3,3]]
 <strong>Output:</strong> [1,0]
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_2_v2.png" style="width: 376px; height: 366px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1057.Campus%20Bikes/images/1261_example_2_v2.png" style="width: 376px; height: 366px;" />
 <pre>
 <strong>Input:</strong> workers = [[0,0],[1,1],[2,0]], bikes = [[1,0],[2,2],[2,1]]
 <strong>Output:</strong> [0,2,1]
diff --git a/solution/1000-1099/1059.All Paths from Source Lead to Destination/README.md b/solution/1000-1099/1059.All Paths from Source Lead to Destination/README.md
index 6cb888396cd57..3dfb1dc5e6d06 100644
--- a/solution/1000-1099/1059.All Paths from Source Lead to Destination/README.md	
+++ b/solution/1000-1099/1059.All Paths from Source Lead to Destination/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_1.png" style="height: 208px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_1.png" style="height: 208px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 3, edges = [[0,1],[0,2]], source = 0, destination = 2
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_2.png" style="height: 230px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_2.png" style="height: 230px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, edges = [[0,1],[0,3],[1,2],[2,1]], source = 0, destination = 3
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_3.png" style="height: 183px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_3.png" style="height: 183px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, edges = [[0,1],[0,2],[1,3],[2,3]], source = 0, destination = 3
diff --git a/solution/1000-1099/1059.All Paths from Source Lead to Destination/README_EN.md b/solution/1000-1099/1059.All Paths from Source Lead to Destination/README_EN.md
index d026393e2ba6d..80db33e44aaae 100644
--- a/solution/1000-1099/1059.All Paths from Source Lead to Destination/README_EN.md	
+++ b/solution/1000-1099/1059.All Paths from Source Lead to Destination/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_1.png" style="width: 200px; height: 208px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_1.png" style="width: 200px; height: 208px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[0,2]], source = 0, destination = 2
 <strong>Output:</strong> false
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_2.png" style="width: 200px; height: 230px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_2.png" style="width: 200px; height: 230px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[0,1],[0,3],[1,2],[2,1]], source = 0, destination = 3
 <strong>Output:</strong> false
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_3.png" style="width: 200px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1059.All%20Paths%20from%20Source%20Lead%20to%20Destination/images/485_example_3.png" style="width: 200px; height: 183px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[0,1],[0,2],[1,3],[2,3]], source = 0, destination = 3
 <strong>Output:</strong> true
diff --git a/solution/1000-1099/1066.Campus Bikes II/README.md b/solution/1000-1099/1066.Campus Bikes II/README.md
index 8e017b142998b..9d408d9397adc 100644
--- a/solution/1000-1099/1066.Campus Bikes II/README.md	
+++ b/solution/1000-1099/1066.Campus Bikes II/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_1_v2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_1_v2.png" /></p>
 
 <pre>
 <strong>输入：</strong>workers = [[0,0],[2,1]], bikes = [[1,2],[3,3]]
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_2_v2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_2_v2.png" /></p>
 
 <pre>
 <strong>输入：</strong>workers = [[0,0],[1,1],[2,0]], bikes = [[1,0],[2,2],[2,1]]
diff --git a/solution/1000-1099/1066.Campus Bikes II/README_EN.md b/solution/1000-1099/1066.Campus Bikes II/README_EN.md
index 869b71c8c5bee..f9699d01f9edc 100644
--- a/solution/1000-1099/1066.Campus Bikes II/README_EN.md	
+++ b/solution/1000-1099/1066.Campus Bikes II/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_1_v2.png" style="width: 376px; height: 366px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_1_v2.png" style="width: 376px; height: 366px;" />
 <pre>
 <strong>Input:</strong> workers = [[0,0],[2,1]], bikes = [[1,2],[3,3]]
 <strong>Output:</strong> 6
@@ -23,7 +23,7 @@ We assign bike 0 to worker 0, bike 1 to worker 1. The Manhattan distance of both
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_2_v2.png" style="width: 376px; height: 366px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1066.Campus%20Bikes%20II/images/1261_example_2_v2.png" style="width: 376px; height: 366px;" />
 <pre>
 <strong>Input:</strong> workers = [[0,0],[1,1],[2,0]], bikes = [[1,0],[2,2],[2,1]]
 <strong>Output:</strong> 4
diff --git a/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README.md b/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README.md
index ebefb727dfd8e..177916ced95e9 100644
--- a/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README.md	
+++ b/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1074.Number%20of%20Submatrices%20That%20Sum%20to%20Target/images/mate1.jpg" style="width: 242px; height: 242px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1074.Number%20of%20Submatrices%20That%20Sum%20to%20Target/images/mate1.jpg" style="width: 242px; height: 242px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[0,1,0],[1,1,1],[0,1,0]], target = 0
diff --git a/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README_EN.md b/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README_EN.md
index fb09d2133eb2c..0e59f8dc9a8bb 100644
--- a/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README_EN.md	
+++ b/solution/1000-1099/1074.Number of Submatrices That Sum to Target/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1074.Number%20of%20Submatrices%20That%20Sum%20to%20Target/images/mate1.jpg" style="width: 242px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1074.Number%20of%20Submatrices%20That%20Sum%20to%20Target/images/mate1.jpg" style="width: 242px; height: 242px;" />
 <pre>
 <strong>Input:</strong> matrix = [[0,1,0],[1,1,1],[0,1,0]], target = 0
 <strong>Output:</strong> 4
diff --git a/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README.md b/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README.md
index c8e81e57b0fd1..223ce25d170ca 100644
--- a/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README.md	
+++ b/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README.md	
@@ -16,22 +16,22 @@
 
 <p><strong>示例 1：</strong></p>
 
-<pre><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-1.png" style="height: 200px; width: 482px;">
+<pre><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-1.png" style="height: 200px; width: 482px;">
 输入：</strong>root = [1,2,3,4,-99,-99,7,8,9,-99,-99,12,13,-99,14], limit = 1
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-2.png" style="height: 200px; width: 258px;">
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-2.png" style="height: 200px; width: 258px;">
 输出：</strong>[1,2,3,4,null,null,7,8,9,null,14]
 </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<pre><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-3.png" style="height: 200px; width: 292px;">
+<pre><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-3.png" style="height: 200px; width: 292px;">
 输入：</strong>root = [5,4,8,11,null,17,4,7,1,null,null,5,3], limit = 22
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-4.png" style="height: 200px; width: 264px;">
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-4.png" style="height: 200px; width: 264px;">
 输出：</strong>[5,4,8,11,null,17,4,7,null,null,null,5]</pre>
 
 <p><strong>示例 3：</strong></p>
 
-<pre><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-5.png" style="height: 100px; width: 140px;">
+<pre><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-5.png" style="height: 100px; width: 140px;">
 输入：</strong>root = [5,-6,-6], limit = 0<strong>
 输出：</strong>[]</pre>
 
diff --git a/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README_EN.md b/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README_EN.md
index 6ee2f0ca8545c..a3180041777b4 100644
--- a/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README_EN.md	
+++ b/solution/1000-1099/1080.Insufficient Nodes in Root to Leaf Paths/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-11.png" style="width: 500px; height: 207px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-11.png" style="width: 500px; height: 207px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,-99,-99,7,8,9,-99,-99,12,13,-99,14], limit = 1
 <strong>Output:</strong> [1,2,3,4,null,null,7,8,9,null,14]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-3.png" style="width: 400px; height: 274px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/insufficient-3.png" style="width: 400px; height: 274px;" />
 <pre>
 <strong>Input:</strong> root = [5,4,8,11,null,17,4,7,1,null,null,5,3], limit = 22
 <strong>Output:</strong> [5,4,8,11,null,17,4,7,null,null,null,5]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/screen-shot-2019-06-11-at-83301-pm.png" style="width: 250px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1080.Insufficient%20Nodes%20in%20Root%20to%20Leaf%20Paths/images/screen-shot-2019-06-11-at-83301-pm.png" style="width: 250px; height: 199px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,-3,-5,null,4,null], limit = -1
 <strong>Output:</strong> [1,null,-3,4]
diff --git a/solution/1000-1099/1091.Shortest Path in Binary Matrix/README.md b/solution/1000-1099/1091.Shortest Path in Binary Matrix/README.md
index be389e481d879..c3d12d536454f 100644
--- a/solution/1000-1099/1091.Shortest Path in Binary Matrix/README.md	
+++ b/solution/1000-1099/1091.Shortest Path in Binary Matrix/README.md	
@@ -20,14 +20,14 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example1_1.png" style="width: 500px; height: 234px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example1_1.png" style="width: 500px; height: 234px;" />
 <pre>
 <strong>输入：</strong>grid = [[0,1],[1,0]]
 <strong>输出：</strong>2
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example2_1.png" style="height: 216px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example2_1.png" style="height: 216px; width: 500px;" />
 <pre>
 <strong>输入：</strong>grid = [[0,0,0],[1,1,0],[1,1,0]]
 <strong>输出：</strong>4
diff --git a/solution/1000-1099/1091.Shortest Path in Binary Matrix/README_EN.md b/solution/1000-1099/1091.Shortest Path in Binary Matrix/README_EN.md
index dfd660c3c7379..2b3c794eee551 100644
--- a/solution/1000-1099/1091.Shortest Path in Binary Matrix/README_EN.md	
+++ b/solution/1000-1099/1091.Shortest Path in Binary Matrix/README_EN.md	
@@ -17,14 +17,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example1_1.png" style="width: 500px; height: 234px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example1_1.png" style="width: 500px; height: 234px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1],[1,0]]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example2_1.png" style="height: 216px; width: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1000-1099/1091.Shortest%20Path%20in%20Binary%20Matrix/images/example2_1.png" style="height: 216px; width: 500px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0],[1,1,0],[1,1,0]]
 <strong>Output:</strong> 4
diff --git a/solution/1100-1199/1102.Path With Maximum Minimum Value/README.md b/solution/1100-1199/1102.Path With Maximum Minimum Value/README.md
index 6eccfd461bf0b..475dd9c23bda1 100644
--- a/solution/1100-1199/1102.Path With Maximum Minimum Value/README.md	
+++ b/solution/1100-1199/1102.Path With Maximum Minimum Value/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[5,4,5],[1,2,6],[7,4,6]]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid2.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[2,2,1,2,2,2],[1,2,2,2,1,2]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid3.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid3.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[3,4,6,3,4],[0,2,1,1,7],[8,8,3,2,7],[3,2,4,9,8],[4,1,2,0,0],[4,6,5,4,3]]
diff --git a/solution/1100-1199/1102.Path With Maximum Minimum Value/README_EN.md b/solution/1100-1199/1102.Path With Maximum Minimum Value/README_EN.md
index 918f110ab10cb..c523e59d500b1 100644
--- a/solution/1100-1199/1102.Path With Maximum Minimum Value/README_EN.md	
+++ b/solution/1100-1199/1102.Path With Maximum Minimum Value/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid1.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid1.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[5,4,5],[1,2,6],[7,4,6]]
 <strong>Output:</strong> 4
@@ -22,14 +22,14 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid2.jpg" style="width: 484px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid2.jpg" style="width: 484px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,2,1,2,2,2],[1,2,2,2,1,2]]
 <strong>Output:</strong> 2
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid3.jpg" style="width: 404px; height: 485px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1102.Path%20With%20Maximum%20Minimum%20Value/images/maxgrid3.jpg" style="width: 404px; height: 485px;" />
 <pre>
 <strong>Input:</strong> grid = [[3,4,6,3,4],[0,2,1,1,7],[8,8,3,2,7],[3,2,4,9,8],[4,1,2,0,0],[4,6,5,4,3]]
 <strong>Output:</strong> 3
diff --git a/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README.md b/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README.md
index f8e5dca728c0e..ae408e32b737b 100644
--- a/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README.md	
+++ b/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p>而偶数行（即，第二行、第四行、第六行&hellip;&hellip;）中，按从右到左的顺序进行标记。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1104.Path%20In%20Zigzag%20Labelled%20Binary%20Tree/images/tree.png" style="height: 138px; width: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1104.Path%20In%20Zigzag%20Labelled%20Binary%20Tree/images/tree.png" style="height: 138px; width: 300px;"></p>
 
 <p>给你树上某一个节点的标号 <code>label</code>，请你返回从根节点到该标号为 <code>label</code> 节点的路径，该路径是由途经的节点标号所组成的。</p>
 
diff --git a/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README_EN.md b/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README_EN.md
index 457563c1720d5..095aabd873a79 100644
--- a/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README_EN.md	
+++ b/solution/1100-1199/1104.Path In Zigzag Labelled Binary Tree/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>In the odd numbered rows (ie., the first, third, fifth,...), the labelling is left to right, while in the even numbered rows (second, fourth, sixth,...), the labelling is right to left.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1104.Path%20In%20Zigzag%20Labelled%20Binary%20Tree/images/tree.png" style="width: 300px; height: 138px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1104.Path%20In%20Zigzag%20Labelled%20Binary%20Tree/images/tree.png" style="width: 300px; height: 138px;" /></p>
 
 <p>Given the <code>label</code> of a node in this tree, return the labels in the path from the root of the tree to the&nbsp;node with that <code>label</code>.</p>
 
diff --git a/solution/1100-1199/1105.Filling Bookcase Shelves/README.md b/solution/1100-1199/1105.Filling Bookcase Shelves/README.md
index 08a62774ad876..872897a990726 100644
--- a/solution/1100-1199/1105.Filling Bookcase Shelves/README.md	
+++ b/solution/1100-1199/1105.Filling Bookcase Shelves/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1105.Filling%20Bookcase%20Shelves/images/shelves.png" style="width: 337px; height: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1105.Filling%20Bookcase%20Shelves/images/shelves.png" style="width: 337px; height: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>books = [[1,1],[2,3],[2,3],[1,1],[1,1],[1,1],[1,2]], shelf_width = 4
diff --git a/solution/1100-1199/1105.Filling Bookcase Shelves/README_EN.md b/solution/1100-1199/1105.Filling Bookcase Shelves/README_EN.md
index 2f06956fee337..d313121bb1b25 100644
--- a/solution/1100-1199/1105.Filling Bookcase Shelves/README_EN.md	
+++ b/solution/1100-1199/1105.Filling Bookcase Shelves/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1105.Filling%20Bookcase%20Shelves/images/shelves.png" style="height: 500px; width: 337px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1105.Filling%20Bookcase%20Shelves/images/shelves.png" style="height: 500px; width: 337px;" />
 <pre>
 <strong>Input:</strong> books = [[1,1],[2,3],[2,3],[1,1],[1,1],[1,1],[1,2]], shelf_width = 4
 <strong>Output:</strong> 6
diff --git a/solution/1100-1199/1110.Delete Nodes And Return Forest/README.md b/solution/1100-1199/1110.Delete Nodes And Return Forest/README.md
index 670558e6990a3..23387aa5fde5d 100644
--- a/solution/1100-1199/1110.Delete Nodes And Return Forest/README.md	
+++ b/solution/1100-1199/1110.Delete Nodes And Return Forest/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1110.Delete%20Nodes%20And%20Return%20Forest/images/screen-shot-2019-07-01-at-53836-pm.png" style="height: 150px; width: 237px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1110.Delete%20Nodes%20And%20Return%20Forest/images/screen-shot-2019-07-01-at-53836-pm.png" style="height: 150px; width: 237px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,6,7], to_delete = [3,5]
diff --git a/solution/1100-1199/1110.Delete Nodes And Return Forest/README_EN.md b/solution/1100-1199/1110.Delete Nodes And Return Forest/README_EN.md
index 66923351a88d0..75e7b050a3c7e 100644
--- a/solution/1100-1199/1110.Delete Nodes And Return Forest/README_EN.md	
+++ b/solution/1100-1199/1110.Delete Nodes And Return Forest/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1110.Delete%20Nodes%20And%20Return%20Forest/images/screen-shot-2019-07-01-at-53836-pm.png" style="width: 237px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1110.Delete%20Nodes%20And%20Return%20Forest/images/screen-shot-2019-07-01-at-53836-pm.png" style="width: 237px; height: 150px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,7], to_delete = [3,5]
 <strong>Output:</strong> [[1,2,null,4],[6],[7]]
diff --git a/solution/1100-1199/1111.Maximum Nesting Depth of Two Valid Parentheses Strings/README.md b/solution/1100-1199/1111.Maximum Nesting Depth of Two Valid Parentheses Strings/README.md
index 685bd302201c4..28235237ea82d 100644
--- a/solution/1100-1199/1111.Maximum Nesting Depth of Two Valid Parentheses Strings/README.md	
+++ b/solution/1100-1199/1111.Maximum Nesting Depth of Two Valid Parentheses Strings/README.md	
@@ -12,7 +12,7 @@
 
 <p>有效括号字符串类型与对应的嵌套深度计算方法如下图所示：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1111.Maximum%20Nesting%20Depth%20of%20Two%20Valid%20Parentheses%20Strings/images/1111.png" style="height: 152px; width: 600px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1111.Maximum%20Nesting%20Depth%20of%20Two%20Valid%20Parentheses%20Strings/images/1111.png" style="height: 152px; width: 600px;"></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/1100-1199/1120.Maximum Average Subtree/README.md b/solution/1100-1199/1120.Maximum Average Subtree/README.md
index 967849e66a813..0be35e7aed34e 100644
--- a/solution/1100-1199/1120.Maximum Average Subtree/README.md	
+++ b/solution/1100-1199/1120.Maximum Average Subtree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1120.Maximum%20Average%20Subtree/images/1308_example_1.png" style="height: 123px; width: 132px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1120.Maximum%20Average%20Subtree/images/1308_example_1.png" style="height: 123px; width: 132px;"></p>
 
 <pre><strong>输入：</strong>[5,6,1]
 <strong>输出：</strong>6.00000
diff --git a/solution/1100-1199/1120.Maximum Average Subtree/README_EN.md b/solution/1100-1199/1120.Maximum Average Subtree/README_EN.md
index 0e98b7f158624..65b7ae5ab8d7f 100644
--- a/solution/1100-1199/1120.Maximum Average Subtree/README_EN.md	
+++ b/solution/1100-1199/1120.Maximum Average Subtree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1120.Maximum%20Average%20Subtree/images/1308_example_1.png" style="width: 132px; height: 123px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1120.Maximum%20Average%20Subtree/images/1308_example_1.png" style="width: 132px; height: 123px;" />
 <pre>
 <strong>Input:</strong> root = [5,6,1]
 <strong>Output:</strong> 6.00000
diff --git a/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README.md b/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README.md
index a4baa2d219b18..5170fd03820a3 100644
--- a/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README.md	
+++ b/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1123.Lowest%20Common%20Ancestor%20of%20Deepest%20Leaves/images/sketch1.png" style="height: 340px; width: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1123.Lowest%20Common%20Ancestor%20of%20Deepest%20Leaves/images/sketch1.png" style="height: 340px; width: 400px;" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4]
 <strong>输出：</strong>[2,7,4]
diff --git a/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README_EN.md b/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README_EN.md
index 9b6ec8f75b112..94d0259dbcd4b 100644
--- a/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README_EN.md	
+++ b/solution/1100-1199/1123.Lowest Common Ancestor of Deepest Leaves/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1123.Lowest%20Common%20Ancestor%20of%20Deepest%20Leaves/images/sketch1.png" style="width: 600px; height: 510px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1123.Lowest%20Common%20Ancestor%20of%20Deepest%20Leaves/images/sketch1.png" style="width: 600px; height: 510px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4]
 <strong>Output:</strong> [2,7,4]
diff --git a/solution/1100-1199/1130.Minimum Cost Tree From Leaf Values/README_EN.md b/solution/1100-1199/1130.Minimum Cost Tree From Leaf Values/README_EN.md
index 7c420473c0ab2..23afe8d0e4125 100644
--- a/solution/1100-1199/1130.Minimum Cost Tree From Leaf Values/README_EN.md	
+++ b/solution/1100-1199/1130.Minimum Cost Tree From Leaf Values/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1130.Minimum%20Cost%20Tree%20From%20Leaf%20Values/images/tree1.jpg" style="width: 500px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1130.Minimum%20Cost%20Tree%20From%20Leaf%20Values/images/tree1.jpg" style="width: 500px; height: 169px;" />
 <pre>
 <strong>Input:</strong> arr = [6,2,4]
 <strong>Output:</strong> 32
@@ -27,7 +27,7 @@ The first has a non-leaf node sum 36, and the second has non-leaf node sum 32.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1130.Minimum%20Cost%20Tree%20From%20Leaf%20Values/images/tree2.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1130.Minimum%20Cost%20Tree%20From%20Leaf%20Values/images/tree2.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> arr = [4,11]
 <strong>Output:</strong> 44
diff --git a/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README.md b/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README.md
index 89dc51e34dce9..92da1a54069b1 100644
--- a/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README.md	
+++ b/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex2.png" /></p>
 
 <pre>
 <strong>输入：</strong>n = 3, conections = [[1,2,5],[1,3,6],[2,3,1]]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex1.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex1.png" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, conections = [[1,2,3],[3,4,4]]
diff --git a/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README_EN.md b/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README_EN.md
index dd558d212085c..b9e2ac6788e41 100644
--- a/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README_EN.md	
+++ b/solution/1100-1199/1135.Connecting Cities With Minimum Cost/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex2.png" style="width: 161px; height: 141px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex2.png" style="width: 161px; height: 141px;" />
 <pre>
 <strong>Input:</strong> n = 3, connections = [[1,2,5],[1,3,6],[2,3,1]]
 <strong>Output:</strong> 6
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex1.png" style="width: 136px; height: 91px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1135.Connecting%20Cities%20With%20Minimum%20Cost/images/1314_ex1.png" style="width: 136px; height: 91px;" />
 <pre>
 <strong>Input:</strong> n = 4, connections = [[1,2,3],[3,4,4]]
 <strong>Output:</strong> -1
diff --git a/solution/1100-1199/1136.Parallel Courses/README.md b/solution/1100-1199/1136.Parallel Courses/README.md
index 40c49e0d4647c..2323050379b5f 100644
--- a/solution/1100-1199/1136.Parallel Courses/README.md	
+++ b/solution/1100-1199/1136.Parallel Courses/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/1316_ex1.png" style="height: 101px; width: 126px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/1316_ex1.png" style="height: 101px; width: 126px;"></strong></p>
 
 <pre><strong>输入：</strong>N = 3, relations = [[1,3],[2,3]]
 <strong>输出：</strong>2
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/1316_ex2.png" style="height: 101px; width: 126px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/1316_ex2.png" style="height: 101px; width: 126px;"></strong></p>
 
 <pre><strong>输入：</strong>N = 3, relations = [[1,2],[2,3],[3,1]]
 <strong>输出：</strong>-1
diff --git a/solution/1100-1199/1136.Parallel Courses/README_EN.md b/solution/1100-1199/1136.Parallel Courses/README_EN.md
index 5c63db8169375..d5f00b46b6231 100644
--- a/solution/1100-1199/1136.Parallel Courses/README_EN.md	
+++ b/solution/1100-1199/1136.Parallel Courses/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/course1graph.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/course1graph.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 3, relations = [[1,3],[2,3]]
 <strong>Output:</strong> 2
@@ -22,7 +22,7 @@ In the second semester, you can take course 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/course2graph.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1136.Parallel%20Courses/images/course2graph.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 3, relations = [[1,2],[2,3],[3,1]]
 <strong>Output:</strong> -1
diff --git a/solution/1100-1199/1138.Alphabet Board Path/README.md b/solution/1100-1199/1138.Alphabet Board Path/README.md
index 25aeb2a142d3f..a49b878fdd70f 100644
--- a/solution/1100-1199/1138.Alphabet Board Path/README.md	
+++ b/solution/1100-1199/1138.Alphabet Board Path/README.md	
@@ -10,7 +10,7 @@
 
 <p>在本题里，字母板为<code>board = ["abcde", "fghij", "klmno", "pqrst", "uvwxy", "z"]</code>，如下所示。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1138.Alphabet%20Board%20Path/images/azboard.png" style="width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1138.Alphabet%20Board%20Path/images/azboard.png" style="width: 300px;" /></p>
 
 <p>我们可以按下面的指令规则行动：</p>
 
diff --git a/solution/1100-1199/1138.Alphabet Board Path/README_EN.md b/solution/1100-1199/1138.Alphabet Board Path/README_EN.md
index 49c93ac5b2a9a..472bd73cec26e 100644
--- a/solution/1100-1199/1138.Alphabet Board Path/README_EN.md	
+++ b/solution/1100-1199/1138.Alphabet Board Path/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>Here, <code>board = [&quot;abcde&quot;, &quot;fghij&quot;, &quot;klmno&quot;, &quot;pqrst&quot;, &quot;uvwxy&quot;, &quot;z&quot;]</code>, as shown in the diagram below.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1138.Alphabet%20Board%20Path/images/azboard.png" style="width: 250px; height: 317px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1138.Alphabet%20Board%20Path/images/azboard.png" style="width: 250px; height: 317px;" /></p>
 
 <p>We may make the following moves:</p>
 
diff --git a/solution/1100-1199/1143.Longest Common Subsequence/README.md b/solution/1100-1199/1143.Longest Common Subsequence/README.md
index 79df6dbfdbb9c..56ae7e2cb634c 100644
--- a/solution/1100-1199/1143.Longest Common Subsequence/README.md	
+++ b/solution/1100-1199/1143.Longest Common Subsequence/README.md	
@@ -61,7 +61,7 @@
 
 递推公式如下：
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1143.Longest%20Common%20Subsequence/images/CodeCogsEqn.gif)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1143.Longest%20Common%20Subsequence/images/CodeCogsEqn.gif)
 
 时间复杂度 O(mn)。
 
diff --git a/solution/1100-1199/1143.Longest Common Subsequence/README_EN.md b/solution/1100-1199/1143.Longest Common Subsequence/README_EN.md
index 8a615ae696e20..7179353a43d27 100644
--- a/solution/1100-1199/1143.Longest Common Subsequence/README_EN.md	
+++ b/solution/1100-1199/1143.Longest Common Subsequence/README_EN.md	
@@ -51,7 +51,7 @@
 
 Dynamic programming.
 
-![](https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1143.Longest%20Common%20Subsequence/images/CodeCogsEqn.gif)
+![](https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1143.Longest%20Common%20Subsequence/images/CodeCogsEqn.gif)
 
 <!-- tabs:start -->
 
diff --git a/solution/1100-1199/1145.Binary Tree Coloring Game/README.md b/solution/1100-1199/1145.Binary Tree Coloring Game/README.md
index 28469ea03b50c..9d1ca98bd3249 100644
--- a/solution/1100-1199/1145.Binary Tree Coloring Game/README.md	
+++ b/solution/1100-1199/1145.Binary Tree Coloring Game/README.md	
@@ -34,7 +34,7 @@
 
 <p><strong>示例：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1145.Binary%20Tree%20Coloring%20Game/images/1480-binary-tree-coloring-game.png" style="height: 186px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1145.Binary%20Tree%20Coloring%20Game/images/1480-binary-tree-coloring-game.png" style="height: 186px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,2,3,4,5,6,7,8,9,10,11], n = 11, x = 3
 <strong>输出：</strong>True
diff --git a/solution/1100-1199/1145.Binary Tree Coloring Game/README_EN.md b/solution/1100-1199/1145.Binary Tree Coloring Game/README_EN.md
index e34ce0245858a..24c14a485d302 100644
--- a/solution/1100-1199/1145.Binary Tree Coloring Game/README_EN.md	
+++ b/solution/1100-1199/1145.Binary Tree Coloring Game/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1145.Binary%20Tree%20Coloring%20Game/images/1480-binary-tree-coloring-game.png" style="width: 500px; height: 310px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1145.Binary%20Tree%20Coloring%20Game/images/1480-binary-tree-coloring-game.png" style="width: 500px; height: 310px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,7,8,9,10,11], n = 11, x = 3
 <strong>Output:</strong> true
diff --git a/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README.md b/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README.md
index 867d11dc5e74b..807040ec4200c 100644
--- a/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README.md	
+++ b/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/images/capture.jpeg" style="height: 175px; width: 200px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/images/capture.jpeg" style="height: 175px; width: 200px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,7,0,7,-8,null,null]
diff --git a/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README_EN.md b/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README_EN.md
index c53d226a998f7..1b9b887a3f75c 100644
--- a/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README_EN.md	
+++ b/solution/1100-1199/1161.Maximum Level Sum of a Binary Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/images/capture.jpg" style="width: 200px; height: 175px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/images/capture.jpg" style="width: 200px; height: 175px;" />
 <pre>
 <strong>Input:</strong> root = [1,7,0,7,-8,null,null]
 <strong>Output:</strong> 2
diff --git a/solution/1100-1199/1162.As Far from Land as Possible/README.md b/solution/1100-1199/1162.As Far from Land as Possible/README.md
index f1bd065775d81..72de6db2db92c 100644
--- a/solution/1100-1199/1162.As Far from Land as Possible/README.md	
+++ b/solution/1100-1199/1162.As Far from Land as Possible/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex1.jpeg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex1.jpeg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,0,1],[0,0,0],[1,0,1]]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex2.jpeg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex2.jpeg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,0,0],[0,0,0],[0,0,0]]
diff --git a/solution/1100-1199/1162.As Far from Land as Possible/README_EN.md b/solution/1100-1199/1162.As Far from Land as Possible/README_EN.md
index c94dda46035df..aa0ebaa62fd82 100644
--- a/solution/1100-1199/1162.As Far from Land as Possible/README_EN.md	
+++ b/solution/1100-1199/1162.As Far from Land as Possible/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex1.jpg" style="width: 185px; height: 87px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex1.jpg" style="width: 185px; height: 87px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,1],[0,0,0],[1,0,1]]
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex2.jpg" style="width: 184px; height: 87px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1162.As%20Far%20from%20Land%20as%20Possible/images/1336_ex2.jpg" style="width: 184px; height: 87px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0],[0,0,0],[0,0,0]]
 <strong>Output:</strong> 4
diff --git a/solution/1100-1199/1168.Optimize Water Distribution in a Village/README.md b/solution/1100-1199/1168.Optimize Water Distribution in a Village/README.md
index 81d288823cdf6..e15442551d0c7 100644
--- a/solution/1100-1199/1168.Optimize Water Distribution in a Village/README.md	
+++ b/solution/1100-1199/1168.Optimize Water Distribution in a Village/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1168.Optimize%20Water%20Distribution%20in%20a%20Village/images/1359_ex1.png" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1168.Optimize%20Water%20Distribution%20in%20a%20Village/images/1359_ex1.png" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 3, wells = [1,2,2], pipes = [[1,2,1],[2,3,1]]
diff --git a/solution/1100-1199/1168.Optimize Water Distribution in a Village/README_EN.md b/solution/1100-1199/1168.Optimize Water Distribution in a Village/README_EN.md
index 6cbbcf4b56782..5ac81055796ac 100644
--- a/solution/1100-1199/1168.Optimize Water Distribution in a Village/README_EN.md	
+++ b/solution/1100-1199/1168.Optimize Water Distribution in a Village/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1168.Optimize%20Water%20Distribution%20in%20a%20Village/images/1359_ex1.png" style="width: 189px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1168.Optimize%20Water%20Distribution%20in%20a%20Village/images/1359_ex1.png" style="width: 189px; height: 196px;" />
 <pre>
 <strong>Input:</strong> n = 3, wells = [1,2,2], pipes = [[1,2,1],[2,3,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1100-1199/1184.Distance Between Bus Stops/README.md b/solution/1100-1199/1184.Distance Between Bus Stops/README.md
index 6aeddf744119d..0720c9cf1cdcf 100644
--- a/solution/1100-1199/1184.Distance Between Bus Stops/README.md	
+++ b/solution/1100-1199/1184.Distance Between Bus Stops/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1.jpg" style="height: 240px; width: 388px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1.jpg" style="height: 240px; width: 388px;"></p>
 
 <pre><strong>输入：</strong>distance = [1,2,3,4], start = 0, destination = 1
 <strong>输出：</strong>1
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-1.jpg" style="height: 240px; width: 388px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-1.jpg" style="height: 240px; width: 388px;"></p>
 
 <pre><strong>输入：</strong>distance = [1,2,3,4], start = 0, destination = 2
 <strong>输出：</strong>3
@@ -37,7 +37,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-2.jpg" style="height: 240px; width: 388px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-2.jpg" style="height: 240px; width: 388px;"></p>
 
 <pre><strong>输入：</strong>distance = [1,2,3,4], start = 0, destination = 3
 <strong>输出：</strong>4
diff --git a/solution/1100-1199/1184.Distance Between Bus Stops/README_EN.md b/solution/1100-1199/1184.Distance Between Bus Stops/README_EN.md
index e17284151e986..7691d926a54d1 100644
--- a/solution/1100-1199/1184.Distance Between Bus Stops/README_EN.md	
+++ b/solution/1100-1199/1184.Distance Between Bus Stops/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1.jpg" style="width: 388px; height: 240px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1.jpg" style="width: 388px; height: 240px;" /></p>
 
 <pre>
 
@@ -28,7 +28,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-1.jpg" style="width: 388px; height: 240px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-1.jpg" style="width: 388px; height: 240px;" /></p>
 
 <pre>
 
@@ -44,7 +44,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-2.jpg" style="width: 388px; height: 240px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1184.Distance%20Between%20Bus%20Stops/images/untitled-diagram-1-2.jpg" style="width: 388px; height: 240px;" /></p>
 
 <pre>
 
diff --git a/solution/1100-1199/1185.Day of the Week/README.md b/solution/1100-1199/1185.Day of the Week/README.md
index d2054c50b0fc8..9f16f94efcff1 100644
--- a/solution/1100-1199/1185.Day of the Week/README.md	
+++ b/solution/1100-1199/1185.Day of the Week/README.md	
@@ -46,7 +46,7 @@
 
 直接调库或者应用蔡勒公式。
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1185.Day%20of%20the%20Week/images/zeller.svg">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1185.Day%20of%20the%20Week/images/zeller.svg">
 
 -   `w`: 星期（从 Sunday 开始）
 -   `c`: 年份前两位
diff --git a/solution/1100-1199/1185.Day of the Week/README_EN.md b/solution/1100-1199/1185.Day of the Week/README_EN.md
index ac4dab48dc5f7..1de912260f670 100644
--- a/solution/1100-1199/1185.Day of the Week/README_EN.md	
+++ b/solution/1100-1199/1185.Day of the Week/README_EN.md	
@@ -43,7 +43,7 @@
 
 Zeller formula.
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1185.Day%20of%20the%20Week/images/zeller.svg">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1185.Day%20of%20the%20Week/images/zeller.svg">
 
 <!-- tabs:start -->
 
diff --git a/solution/1100-1199/1189.Maximum Number of Balloons/README.md b/solution/1100-1199/1189.Maximum Number of Balloons/README.md
index c2da0b9fed218..b2c0fb379cc9a 100644
--- a/solution/1100-1199/1189.Maximum Number of Balloons/README.md	
+++ b/solution/1100-1199/1189.Maximum Number of Balloons/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex1_upd.jpeg" style="height: 35px; width: 154px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex1_upd.jpeg" style="height: 35px; width: 154px;"></strong></p>
 
 <pre><strong>输入：</strong>text = &quot;nlaebolko&quot;
 <strong>输出：</strong>1
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex2_upd.jpeg" style="height: 35px; width: 233px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex2_upd.jpeg" style="height: 35px; width: 233px;"></strong></p>
 
 <pre><strong>输入：</strong>text = &quot;loonbalxballpoon&quot;
 <strong>输出：</strong>2
diff --git a/solution/1100-1199/1189.Maximum Number of Balloons/README_EN.md b/solution/1100-1199/1189.Maximum Number of Balloons/README_EN.md
index 627b68ebcda32..436dfae3c6e53 100644
--- a/solution/1100-1199/1189.Maximum Number of Balloons/README_EN.md	
+++ b/solution/1100-1199/1189.Maximum Number of Balloons/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex1_upd.jpg" style="width: 132px; height: 35px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex1_upd.jpg" style="width: 132px; height: 35px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> text = &quot;nlaebolko&quot;
@@ -20,7 +20,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex2_upd.jpg" style="width: 267px; height: 35px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1189.Maximum%20Number%20of%20Balloons/images/1536_ex2_upd.jpg" style="width: 267px; height: 35px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> text = &quot;loonbalxballpoon&quot;
diff --git a/solution/1100-1199/1192.Critical Connections in a Network/README.md b/solution/1100-1199/1192.Critical Connections in a Network/README.md
index 9201d1433ee55..a7764f5ceeddb 100644
--- a/solution/1100-1199/1192.Critical Connections in a Network/README.md	
+++ b/solution/1100-1199/1192.Critical Connections in a Network/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1192.Critical%20Connections%20in%20a%20Network/images/critical-connections-in-a-network.png" style="height: 205px; width: 200px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1192.Critical%20Connections%20in%20a%20Network/images/critical-connections-in-a-network.png" style="height: 205px; width: 200px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 4, connections = [[0,1],[1,2],[2,0],[1,3]]
diff --git a/solution/1100-1199/1192.Critical Connections in a Network/README_EN.md b/solution/1100-1199/1192.Critical Connections in a Network/README_EN.md
index 418e731ce3d78..27c63100815d5 100644
--- a/solution/1100-1199/1192.Critical Connections in a Network/README_EN.md	
+++ b/solution/1100-1199/1192.Critical Connections in a Network/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1192.Critical%20Connections%20in%20a%20Network/images/1537_ex1_2.png" style="width: 198px; height: 248px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1192.Critical%20Connections%20in%20a%20Network/images/1537_ex1_2.png" style="width: 198px; height: 248px;" />
 <pre>
 <strong>Input:</strong> n = 4, connections = [[0,1],[1,2],[2,0],[1,3]]
 <strong>Output:</strong> [[1,3]]
diff --git a/solution/1100-1199/1197.Minimum Knight Moves/README.md b/solution/1100-1199/1197.Minimum Knight Moves/README.md
index 61e83f334e3c0..b79d82455ea9d 100644
--- a/solution/1100-1199/1197.Minimum Knight Moves/README.md	
+++ b/solution/1100-1199/1197.Minimum Knight Moves/README.md	
@@ -12,7 +12,7 @@
 
 <p>每次移动，他都可以按图示八个方向之一前进。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1197.Minimum%20Knight%20Moves/images/knight.png" style="width: 250px; height: 250px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1197.Minimum%20Knight%20Moves/images/knight.png" style="width: 250px; height: 250px;" /></p>
 
 <p>返回 <em>骑士前去征服坐标为&nbsp;<code>[x, y]</code>&nbsp;的部落所需的最小移动次数</em> 。本题确保答案是一定存在的。</p>
 
diff --git a/solution/1100-1199/1197.Minimum Knight Moves/README_EN.md b/solution/1100-1199/1197.Minimum Knight Moves/README_EN.md
index f156455e71685..2449ebe110ed3 100644
--- a/solution/1100-1199/1197.Minimum Knight Moves/README_EN.md	
+++ b/solution/1100-1199/1197.Minimum Knight Moves/README_EN.md	
@@ -7,7 +7,7 @@
 <p>In an <strong>infinite</strong> chess board with coordinates from <code>-infinity</code> to <code>+infinity</code>, you have a <strong>knight</strong> at square <code>[0, 0]</code>.</p>
 
 <p>A knight has 8 possible moves it can make, as illustrated below. Each move is two squares in a cardinal direction, then one square in an orthogonal direction.</p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1197.Minimum%20Knight%20Moves/images/knight.png" style="height: 250px; width: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1100-1199/1197.Minimum%20Knight%20Moves/images/knight.png" style="height: 250px; width: 250px;" />
 <p>Return <em>the minimum number of steps needed to move the knight to the square</em> <code>[x, y]</code>. It is guaranteed the answer exists.</p>
 
 <p>&nbsp;</p>
diff --git a/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README.md b/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README.md
index 8ee66197494ef..2bcac65451b6e 100644
--- a/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README.md	
+++ b/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1203.Sort%20Items%20by%20Groups%20Respecting%20Dependencies/images/1359_ex1.png" style="height: 181px; width: 191px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1203.Sort%20Items%20by%20Groups%20Respecting%20Dependencies/images/1359_ex1.png" style="height: 181px; width: 191px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 8, m = 2, group = [-1,-1,1,0,0,1,0,-1], beforeItems = [[],[6],[5],[6],[3,6],[],[],[]]
diff --git a/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README_EN.md b/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README_EN.md
index 1c76c046e640e..51b3cdd96a6c3 100644
--- a/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README_EN.md	
+++ b/solution/1200-1299/1203.Sort Items by Groups Respecting Dependencies/README_EN.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1203.Sort%20Items%20by%20Groups%20Respecting%20Dependencies/images/1359_ex1.png" style="width: 191px; height: 181px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1203.Sort%20Items%20by%20Groups%20Respecting%20Dependencies/images/1359_ex1.png" style="width: 191px; height: 181px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 8, m = 2, group = [-1,-1,1,0,0,1,0,-1], beforeItems = [[],[6],[5],[6],[3,6],[],[],[]]
diff --git a/solution/1200-1299/1206.Design Skiplist/README.md b/solution/1200-1299/1206.Design Skiplist/README.md
index 6cdbc3e2b25d1..c79f1c65ba970 100644
--- a/solution/1200-1299/1206.Design Skiplist/README.md	
+++ b/solution/1200-1299/1206.Design Skiplist/README.md	
@@ -12,7 +12,7 @@
 
 <p>例如，一个跳表包含 <code>[30, 40, 50, 60, 70, 90]</code> ，然后增加 <code>80</code>、<code>45</code> 到跳表中，以下图的方式操作：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1206.Design%20Skiplist/images/1506_skiplist.gif" /><br />
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1206.Design%20Skiplist/images/1506_skiplist.gif" /><br />
 <small>Artyom Kalinin [CC BY-SA 3.0], via <a href="https://commons.wikimedia.org/wiki/File:Skip_list_add_element-en.gif" target="_blank" title="Artyom Kalinin [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons">Wikimedia Commons</a></small></p>
 
 <p>跳表中有很多层，每一层是一个短的链表。在第一层的作用下，增加、删除和搜索操作的时间复杂度不超过 <code>O(n)</code>。跳表的每一个操作的平均时间复杂度是 <code>O(log(n))</code>，空间复杂度是 <code>O(n)</code>。</p>
diff --git a/solution/1200-1299/1206.Design Skiplist/README_EN.md b/solution/1200-1299/1206.Design Skiplist/README_EN.md
index e477b8633cfb9..bf338a37aa7da 100644
--- a/solution/1200-1299/1206.Design Skiplist/README_EN.md	
+++ b/solution/1200-1299/1206.Design Skiplist/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>For example, we have a Skiplist containing <code>[30,40,50,60,70,90]</code> and we want to add <code>80</code> and <code>45</code> into it. The Skiplist works this way:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1206.Design%20Skiplist/images/1506_skiplist.gif" style="width: 500px; height: 173px;" /><br />
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1206.Design%20Skiplist/images/1506_skiplist.gif" style="width: 500px; height: 173px;" /><br />
 <small>Artyom Kalinin [CC BY-SA 3.0], via <a href="https://commons.wikimedia.org/wiki/File:Skip_list_add_element-en.gif" target="_blank" title="Artyom Kalinin [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons">Wikimedia Commons</a></small></p>
 
 <p>You can see there are many layers in the Skiplist. Each layer is a sorted linked list. With the help of the top layers, add, erase and search can be faster than <code>O(n)</code>. It can be proven that the average time complexity for each operation is <code>O(log(n))</code> and space complexity is <code>O(n)</code>.</p>
diff --git a/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README.md b/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README.md
index 0f34d03f9adf1..43c2172b2e068 100644
--- a/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README.md	
+++ b/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README.md	
@@ -16,9 +16,9 @@
 	<li>如果没有障碍，则向右移动一个单元格。并仍然保持身体的水平／竖直状态。</li>
 	<li>如果没有障碍，则向下移动一个单元格。并仍然保持身体的水平／竖直状态。</li>
 	<li>如果它处于水平状态并且其下面的两个单元都是空的，就顺时针旋转 90 度。蛇从（<code>(r, c)</code>、<code>(r, c+1)</code>）移动到 （<code>(r, c)</code>、<code>(r+1, c)</code>）。<br>
-	<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-2.png" style="height: 134px; width: 300px;"></li>
+	<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-2.png" style="height: 134px; width: 300px;"></li>
 	<li>如果它处于竖直状态并且其右面的两个单元都是空的，就逆时针旋转 90 度。蛇从（<code>(r, c)</code>、<code>(r+1, c)</code>）移动到（<code>(r, c)</code>、<code>(r, c+1)</code>）。<br>
-	<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-1.png" style="height: 121px; width: 300px;"></li>
+	<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-1.png" style="height: 121px; width: 300px;"></li>
 </ul>
 
 <p>返回蛇抵达目的地所需的最少移动次数。</p>
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image.png" style="height: 439px; width: 400px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image.png" style="height: 439px; width: 400px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[0,0,0,0,0,1],
                [1,1,0,0,1,0],
diff --git a/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README_EN.md b/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README_EN.md
index 5a1b88fb35b4a..5d44acc080c0e 100644
--- a/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README_EN.md	
+++ b/solution/1200-1299/1210.Minimum Moves to Reach Target with Rotations/README_EN.md	
@@ -12,9 +12,9 @@
 	<li>Move one cell to the right&nbsp;if there are no blocked cells there. This move keeps the horizontal/vertical position of the snake as it is.</li>
 	<li>Move down one cell&nbsp;if there are no blocked cells there. This move keeps the horizontal/vertical position of the snake as it is.</li>
 	<li>Rotate clockwise if it&#39;s in a horizontal position and the two cells under it are both empty. In that case the snake moves from&nbsp;<code>(r, c)</code>&nbsp;and&nbsp;<code>(r, c+1)</code>&nbsp;to&nbsp;<code>(r, c)</code>&nbsp;and&nbsp;<code>(r+1, c)</code>.<br />
-	<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-2.png" style="width: 300px; height: 134px;" /></li>
+	<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-2.png" style="width: 300px; height: 134px;" /></li>
 	<li>Rotate counterclockwise&nbsp;if it&#39;s in a vertical position and the two cells to its right are both empty. In that case the snake moves from&nbsp;<code>(r, c)</code>&nbsp;and&nbsp;<code>(r+1, c)</code>&nbsp;to&nbsp;<code>(r, c)</code>&nbsp;and&nbsp;<code>(r, c+1)</code>.<br />
-	<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-1.png" style="width: 300px; height: 121px;" /></li>
+	<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image-1.png" style="width: 300px; height: 121px;" /></li>
 </ul>
 
 <p>Return the minimum number of moves to reach the target.</p>
@@ -24,7 +24,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image.png" style="width: 400px; height: 439px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1210.Minimum%20Moves%20to%20Reach%20Target%20with%20Rotations/images/image.png" style="width: 400px; height: 439px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[0,0,0,0,0,1],
diff --git a/solution/1200-1299/1214.Two Sum BSTs/README.md b/solution/1200-1299/1214.Two Sum BSTs/README.md
index a1d679f0e9984..e941c344716bc 100644
--- a/solution/1200-1299/1214.Two Sum BSTs/README.md	
+++ b/solution/1200-1299/1214.Two Sum BSTs/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex1.png" style="height: 169px; width: 369px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex1.png" style="height: 169px; width: 369px;" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [2,1,4], root2 = [1,0,3], target = 5
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex2.png" style="height: 290px; width: 453px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex2.png" style="height: 290px; width: 453px;" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [0,-10,10], root2 = [5,1,7,0,2], target = 18
diff --git a/solution/1200-1299/1214.Two Sum BSTs/README_EN.md b/solution/1200-1299/1214.Two Sum BSTs/README_EN.md
index 8c207ab4045f5..c4a7aaf07ca71 100644
--- a/solution/1200-1299/1214.Two Sum BSTs/README_EN.md	
+++ b/solution/1200-1299/1214.Two Sum BSTs/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex1.png" style="width: 369px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex1.png" style="width: 369px; height: 169px;" />
 <pre>
 <strong>Input:</strong> root1 = [2,1,4], root2 = [1,0,3], target = 5
 <strong>Output:</strong> true
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex2.png" style="width: 453px; height: 290px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1214.Two%20Sum%20BSTs/images/ex2.png" style="width: 453px; height: 290px;" />
 <pre>
 <strong>Input:</strong> root1 = [0,-10,10], root2 = [5,1,7,0,2], target = 18
 <strong>Output:</strong> false
diff --git a/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README.md b/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README.md
index 338d1df355c31..65631a159e531 100644
--- a/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README.md	
+++ b/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chips_e1.jpg" style="height: 217px; width: 750px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chips_e1.jpg" style="height: 217px; width: 750px;" /></p>
 
 <pre>
 <strong>输入：</strong>position = [1,2,3]
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chip_e2.jpg" style="height: 306px; width: 750px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chip_e2.jpg" style="height: 306px; width: 750px;" /></p>
 
 <pre>
 <strong>输入：</strong>position = [2,2,2,3,3]
diff --git a/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README_EN.md b/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README_EN.md
index dc64eb658425b..329523a67ba73 100644
--- a/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README_EN.md	
+++ b/solution/1200-1299/1217.Minimum Cost to Move Chips to The Same Position/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chips_e1.jpg" style="width: 750px; height: 217px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chips_e1.jpg" style="width: 750px; height: 217px;" />
 <pre>
 <strong>Input:</strong> position = [1,2,3]
 <strong>Output:</strong> 1
@@ -27,7 +27,7 @@ Total cost is 1.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chip_e2.jpg" style="width: 750px; height: 306px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/images/chip_e2.jpg" style="width: 750px; height: 306px;" />
 <pre>
 <strong>Input:</strong> position = [2,2,2,3,3]
 <strong>Output:</strong> 2
diff --git a/solution/1200-1299/1222.Queens That Can Attack the King/README.md b/solution/1200-1299/1222.Queens That Can Attack the King/README.md
index 79e8a4d3d7977..7144ac7850fb5 100644
--- a/solution/1200-1299/1222.Queens That Can Attack the King/README.md	
+++ b/solution/1200-1299/1222.Queens That Can Attack the King/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>queens = [[0,1],[1,0],[4,0],[0,4],[3,3],[2,4]], king = [0,0]
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-1.jpg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-1.jpg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>queens = [[0,0],[1,1],[2,2],[3,4],[3,5],[4,4],[4,5]], king = [3,3]
@@ -39,7 +39,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-2.jpg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-2.jpg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>queens = [[5,6],[7,7],[2,1],[0,7],[1,6],[5,1],[3,7],[0,3],[4,0],[1,2],[6,3],[5,0],[0,4],[2,2],[1,1],[6,4],[5,4],[0,0],[2,6],[4,5],[5,2],[1,4],[7,5],[2,3],[0,5],[4,2],[1,0],[2,7],[0,1],[4,6],[6,1],[0,6],[4,3],[1,7]], king = [3,4]
diff --git a/solution/1200-1299/1222.Queens That Can Attack the King/README_EN.md b/solution/1200-1299/1222.Queens That Can Attack the King/README_EN.md
index ab5348bd16202..0b08025288849 100644
--- a/solution/1200-1299/1222.Queens That Can Attack the King/README_EN.md	
+++ b/solution/1200-1299/1222.Queens That Can Attack the King/README_EN.md	
@@ -10,7 +10,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram.jpg" style="width: 321px; height: 321px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram.jpg" style="width: 321px; height: 321px;" /></p>
 
 <pre>
 
@@ -36,7 +36,7 @@ The queen at [2,4] can&#39;t attack the king cause it&#39;s not in the same row/
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-1.jpg" style="width: 321px; height: 321px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-1.jpg" style="width: 321px; height: 321px;" /></strong></p>
 
 <pre>
 
@@ -48,7 +48,7 @@ The queen at [2,4] can&#39;t attack the king cause it&#39;s not in the same row/
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-2.jpg" style="width: 321px; height: 321px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1222.Queens%20That%20Can%20Attack%20the%20King/images/untitled-diagram-2.jpg" style="width: 321px; height: 321px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1200-1299/1226.The Dining Philosophers/README.md b/solution/1200-1299/1226.The Dining Philosophers/README.md
index c3fb96c24152f..1c3c4685d59ad 100644
--- a/solution/1200-1299/1226.The Dining Philosophers/README.md	
+++ b/solution/1200-1299/1226.The Dining Philosophers/README.md	
@@ -14,7 +14,7 @@
 
 <p>设计一个进餐规则（并行算法）使得每个哲学家都不会挨饿；也就是说，在没有人知道别人什么时候想吃东西或思考的情况下，每个哲学家都可以在吃饭和思考之间一直交替下去。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1226.The%20Dining%20Philosophers/images/an_illustration_of_the_dining_philosophers_problem.png" style="height: 415px; width: 400px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1226.The%20Dining%20Philosophers/images/an_illustration_of_the_dining_philosophers_problem.png" style="height: 415px; width: 400px;"></p>
 
 <p><em>问题描述和图片来自维基百科&nbsp;<a href="https://en.wikipedia.org/wiki/Dining_philosophers_problem" target="_blank">wikipedia.org</a></em></p>
 
diff --git a/solution/1200-1299/1226.The Dining Philosophers/README_EN.md b/solution/1200-1299/1226.The Dining Philosophers/README_EN.md
index 8bdcb58be9476..e0267e9759c36 100644
--- a/solution/1200-1299/1226.The Dining Philosophers/README_EN.md	
+++ b/solution/1200-1299/1226.The Dining Philosophers/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>Design a discipline of behaviour (a concurrent algorithm) such that no philosopher will starve;&nbsp;<i>i.e.</i>, each can forever continue to alternate between eating and thinking, assuming that no philosopher can know when others may want to eat or think.</p>
 
-<p style="text-align: center"><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1226.The%20Dining%20Philosophers/images/an_illustration_of_the_dining_philosophers_problem.png" style="width: 400px; height: 415px;" /></p>
+<p style="text-align: center"><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1226.The%20Dining%20Philosophers/images/an_illustration_of_the_dining_philosophers_problem.png" style="width: 400px; height: 415px;" /></p>
 
 <p style="text-align: center"><em>The problem statement and the image above are taken from <a href="https://en.wikipedia.org/wiki/Dining_philosophers_problem" target="_blank">wikipedia.org</a></em></p>
 
diff --git a/solution/1200-1299/1232.Check If It Is a Straight Line/README.md b/solution/1200-1299/1232.Check If It Is a Straight Line/README.md
index 7318aa841ad56..eb744798cb03b 100644
--- a/solution/1200-1299/1232.Check If It Is a Straight Line/README.md	
+++ b/solution/1200-1299/1232.Check If It Is a Straight Line/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-2.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>coordinates = [[1,2],[2,3],[3,4],[4,5],[5,6],[6,7]]
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-1.jpg" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-1.jpg" /></strong></p>
 
 <pre>
 <strong>输入：</strong>coordinates = [[1,1],[2,2],[3,4],[4,5],[5,6],[7,7]]
diff --git a/solution/1200-1299/1232.Check If It Is a Straight Line/README_EN.md b/solution/1200-1299/1232.Check If It Is a Straight Line/README_EN.md
index 44c7d3bf5a15f..394d1e56ebf1c 100644
--- a/solution/1200-1299/1232.Check If It Is a Straight Line/README_EN.md	
+++ b/solution/1200-1299/1232.Check If It Is a Straight Line/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-2.jpg" style="width: 336px; height: 336px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-2.jpg" style="width: 336px; height: 336px;" /></p>
 
 <pre>
 
@@ -24,7 +24,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-1.jpg" style="width: 348px; height: 336px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1232.Check%20If%20It%20Is%20a%20Straight%20Line/images/untitled-diagram-1.jpg" style="width: 348px; height: 336px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README.md b/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README.md
index a399272e0a656..6ac2d781f8ee9 100644
--- a/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README.md	
+++ b/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample1_1584.png" style="width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample1_1584.png" style="width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>startTime = [1,2,3,3], endTime = [3,4,5,6], profit = [50,10,40,70]
 <strong>输出：</strong>120
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample22_1584.png" style="height: 112px; width: 600px;"> </strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample22_1584.png" style="height: 112px; width: 600px;"> </strong></p>
 
 <pre><strong>输入：</strong>startTime = [1,2,3,4,6], endTime = [3,5,10,6,9], profit = [20,20,100,70,60]
 <strong>输出：</strong>150
@@ -42,7 +42,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample3_1584.png" style="height: 112px; width: 400px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample3_1584.png" style="height: 112px; width: 400px;"></strong></p>
 
 <pre><strong>输入：</strong>startTime = [1,1,1], endTime = [2,3,4], profit = [5,6,4]
 <strong>输出：</strong>6
diff --git a/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README_EN.md b/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README_EN.md
index c24b201d4593a..a5efec7a09472 100644
--- a/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README_EN.md	
+++ b/solution/1200-1299/1235.Maximum Profit in Job Scheduling/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample1_1584.png" style="width: 380px; height: 154px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample1_1584.png" style="width: 380px; height: 154px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> startTime = [1,2,3,3], endTime = [3,4,5,6], profit = [50,10,40,70]
@@ -24,7 +24,7 @@ Time range [1-3]+[3-6] , we get profit of 120 = 50 + 70.
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample22_1584.png" style="width: 600px; height: 112px;" /> </strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample22_1584.png" style="width: 600px; height: 112px;" /> </strong></p>
 
 <pre>
 <strong>Input:</strong> startTime = [1,2,3,4,6], endTime = [3,5,10,6,9], profit = [20,20,100,70,60]
@@ -35,7 +35,7 @@ Profit obtained 150 = 20 + 70 + 60.
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample3_1584.png" style="width: 400px; height: 112px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1235.Maximum%20Profit%20in%20Job%20Scheduling/images/sample3_1584.png" style="width: 400px; height: 112px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> startTime = [1,1,1], endTime = [2,3,4], profit = [5,6,4]
diff --git a/solution/1200-1299/1236.Web Crawler/README.md b/solution/1200-1299/1236.Web Crawler/README.md
index 55eb60201a051..33ec5b69b7598 100644
--- a/solution/1200-1299/1236.Web Crawler/README.md	
+++ b/solution/1200-1299/1236.Web Crawler/README.md	
@@ -17,7 +17,7 @@
 	<li>只输出&nbsp;<strong>域名&nbsp;</strong>与<strong>&nbsp;</strong><code>startUrl</code>&nbsp;<strong>相同&nbsp;</strong>的链接集合</li>
 </ul>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/urlhostname.png" style="height: 164px; width: 600px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/urlhostname.png" style="height: 164px; width: 600px;"></p>
 
 <p>如上所示的一个链接，其域名为&nbsp;<code>example.org</code>。简单起见，你可以假设所有的链接都采用&nbsp;<strong>http协议&nbsp;</strong>并没有指定&nbsp;<strong>端口</strong>。例如，链接&nbsp;<code>http://leetcode.com/problems</code>&nbsp;和&nbsp;<code>http://leetcode.com/contest</code>&nbsp;是同一个域名下的，而链接<code>http://example.org/test</code>&nbsp;和&nbsp;<code>http://example.com/abc</code> 是不在同一域名下的。</p>
 
@@ -34,7 +34,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_2_1497.png" style="height: 300px; width: 610px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_2_1497.png" style="height: 300px; width: 610px;"></p>
 
 <pre><strong>输入：
 </strong>urls = [
@@ -56,7 +56,7 @@ startUrl = &quot;http://news.yahoo.com/news/topics/&quot;
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_3_1497.png" style="height: 270px; width: 540px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_3_1497.png" style="height: 270px; width: 540px;"></strong></p>
 
 <pre><strong>输入：</strong>
 urls = [
diff --git a/solution/1200-1299/1236.Web Crawler/README_EN.md b/solution/1200-1299/1236.Web Crawler/README_EN.md
index 3dc2242175439..e59d9ed6cad7c 100644
--- a/solution/1200-1299/1236.Web Crawler/README_EN.md	
+++ b/solution/1200-1299/1236.Web Crawler/README_EN.md	
@@ -17,7 +17,7 @@
 	<li>Explore only the links that are under the <strong>same hostname</strong> as <code>startUrl</code>.</li>
 </ul>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/urlhostname.png" style="width: 600px; height: 164px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/urlhostname.png" style="width: 600px; height: 164px;" /></p>
 
 <p>As shown in the example url above, the hostname is <code>example.org</code>. For simplicity sake, you may assume all&nbsp;urls use <strong>http protocol</strong> without any&nbsp;<strong>port</strong> specified. For example, the urls&nbsp;<code>http://leetcode.com/problems</code> and&nbsp;<code>http://leetcode.com/contest</code> are under the same hostname, while urls <code>http://example.org/test</code> and <code>http://example.com/abc</code> are not under the same hostname.</p>
 
@@ -34,7 +34,7 @@ interface HtmlParser {
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_2_1497.png" style="width: 610px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_2_1497.png" style="width: 610px; height: 300px;" /></p>
 
 <pre>
 <strong>Input:
@@ -57,7 +57,7 @@ startUrl = &quot;http://news.yahoo.com/news/topics/&quot;
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_3_1497.png" style="width: 540px; height: 270px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1236.Web%20Crawler/images/sample_3_1497.png" style="width: 540px; height: 270px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> 
diff --git a/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README.md b/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README.md
index 42f34cad90398..dce05d4f237ac 100644
--- a/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README.md	
+++ b/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_11_1592.png" style="height: 106px; width: 154px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_11_1592.png" style="height: 106px; width: 154px;"></p>
 
 <pre><strong>输入：</strong>n = 2, m = 3
 <strong>输出：</strong>3
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_22_1592.png" style="height: 126px; width: 224px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_22_1592.png" style="height: 126px; width: 224px;"></p>
 
 <pre><strong>输入：</strong>n = 5, m = 8
 <strong>输出：</strong>5
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_33_1592.png" style="height: 189px; width: 224px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_33_1592.png" style="height: 189px; width: 224px;"></p>
 
 <pre><strong>输入：</strong>n = 11, m = 13
 <strong>输出：</strong>6
diff --git a/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README_EN.md b/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README_EN.md
index 26f5f1d4e6aac..85e130862bc77 100644
--- a/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README_EN.md	
+++ b/solution/1200-1299/1240.Tiling a Rectangle with the Fewest Squares/README_EN.md	
@@ -9,7 +9,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_11_1592.png" style="width: 154px; height: 106px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_11_1592.png" style="width: 154px; height: 106px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 2, m = 3
@@ -20,7 +20,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_22_1592.png" style="width: 224px; height: 126px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_22_1592.png" style="width: 224px; height: 126px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 5, m = 8
@@ -29,7 +29,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_33_1592.png" style="width: 224px; height: 189px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1240.Tiling%20a%20Rectangle%20with%20the%20Fewest%20Squares/images/sample_33_1592.png" style="width: 224px; height: 189px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 11, m = 13
diff --git a/solution/1200-1299/1242.Web Crawler Multithreaded/README.md b/solution/1200-1299/1242.Web Crawler Multithreaded/README.md
index 5c2cb0a7d8e3b..f277f473ff2ea 100644
--- a/solution/1200-1299/1242.Web Crawler Multithreaded/README.md	
+++ b/solution/1200-1299/1242.Web Crawler Multithreaded/README.md	
@@ -19,7 +19,7 @@
 	<li>仅浏览与&nbsp;<code>startUrl</code>&nbsp;<strong>相同主机名&nbsp;</strong>的链接。</li>
 </ul>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e463265c7086cb?w=975&amp;h=266&amp;f=png&amp;s=24624" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/urlhostname.png" style="height:164px; width:600px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e463265c7086cb?w=975&amp;h=266&amp;f=png&amp;s=24624" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/urlhostname.png" style="height:164px; width:600px" /></p>
 
 <p>如上图所示，主机名是&nbsp;<code>example.org</code>&nbsp;。简单起见，你可以假设所有链接都采用&nbsp;<strong>http 协议</strong>，并且没有指定&nbsp;<strong>端口号</strong>。举个例子，链接&nbsp;<code>http://leetcode.com/problems</code> 和链接&nbsp;<code>http://leetcode.com/contest</code> 属于同一个&nbsp;<strong>主机名</strong>， 而&nbsp;<code>http://example.org/test</code>&nbsp;与&nbsp;<code>http://example.com/abc</code> 并不属于同一个&nbsp;<strong>主机名</strong>。</p>
 
@@ -50,7 +50,7 @@ interface HtmlParser {
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_2_1497.png" style="height:287px; width:600px" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e46559da0c446a?w=875&amp;h=418&amp;f=png&amp;s=43518" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_2_1497.png" style="height:287px; width:600px" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e46559da0c446a?w=875&amp;h=418&amp;f=png&amp;s=43518" /></p>
 
 <pre>
 <strong>输入：
@@ -73,7 +73,7 @@ startUrl = &quot;http://news.yahoo.com/news/topics/&quot;
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e4657b399a5fd2?w=654&amp;h=431&amp;f=png&amp;s=33838" /><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_3_1497.png" style="height:395px; width:530px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/16e4657b399a5fd2?w=654&amp;h=431&amp;f=png&amp;s=33838" /><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_3_1497.png" style="height:395px; width:530px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>
diff --git a/solution/1200-1299/1242.Web Crawler Multithreaded/README_EN.md b/solution/1200-1299/1242.Web Crawler Multithreaded/README_EN.md
index c3ca49865a98f..5198d9094ef5f 100644
--- a/solution/1200-1299/1242.Web Crawler Multithreaded/README_EN.md	
+++ b/solution/1200-1299/1242.Web Crawler Multithreaded/README_EN.md	
@@ -16,7 +16,7 @@
 	<li>Do not crawl the same link twice.</li>
 	<li>Explore only the links that are under the <strong>same hostname</strong> as <code>startUrl</code>.</li>
 </ul>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/urlhostname.png" style="width: 500px; height: 136px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/urlhostname.png" style="width: 500px; height: 136px;" />
 <p>As shown in the example URL above, the hostname is <code>example.org</code>. For simplicity&#39;s sake, you may assume all URLs use <strong>HTTP protocol</strong> without any <strong>port</strong> specified. For example, the URLs <code>http://leetcode.com/problems</code> and <code>http://leetcode.com/contest</code> are under the same hostname, while URLs <code>http://example.org/test</code> and <code>http://example.com/abc</code> are not under the same hostname.</p>
 
 <p>The <code>HtmlParser</code> interface is defined as such:</p>
@@ -36,7 +36,7 @@ interface HtmlParser {
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_2_1497.png" style="width: 610px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_2_1497.png" style="width: 610px; height: 300px;" /></p>
 
 <pre>
 <strong>Input:
@@ -59,7 +59,7 @@ startUrl = &quot;http://news.yahoo.com/news/topics/&quot;
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_3_1497.png" style="width: 540px; height: 270px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1242.Web%20Crawler%20Multithreaded/images/sample_3_1497.png" style="width: 540px; height: 270px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> 
diff --git a/solution/1200-1299/1245.Tree Diameter/README.md b/solution/1200-1299/1245.Tree Diameter/README.md
index 31106cb0c087a..5587b8f5cdd93 100644
--- a/solution/1200-1299/1245.Tree Diameter/README.md	
+++ b/solution/1200-1299/1245.Tree Diameter/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/1397_example_1.png" style="height: 233px; width: 226px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/1397_example_1.png" style="height: 233px; width: 226px;"></p>
 
 <pre><strong>输入：</strong>edges = [[0,1],[0,2]]
 <strong>输出：</strong>2
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/1397_example_2.png" style="height: 316px; width: 350px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/1397_example_2.png" style="height: 316px; width: 350px;"></p>
 
 <pre><strong>输入：</strong>edges = [[0,1],[1,2],[2,3],[1,4],[4,5]]
 <strong>输出：</strong>4
@@ -63,7 +63,7 @@
     -   当 y 到达的最远结点 z 横穿 δ(s, t) 时，记与之相交的结点为 x。此时有 δ(y, z) = δ(y, x) + δ(x, z)。而此时 δ(y, z) > δ(y, t)，故可得 δ(x, z) ＞ δ(x, t)。由 1 的结论可知该假设不成立。
     -   当 y 到达的最远结点 z 与 δ(s, t) 不相交时，定义从 y 开始到 t 结束的简单路径上，第一个同时也存在于简单路径 δ(s, t) 上的结点为 x，最后一个存在于简单路径 δ(y, z) 上的结点为 x’。如下图。那么根据假设，有 δ(y, z) ≥ δ(y, t) => δ(x', z) ≥ δ(x', x) + δ(x, t)。既然这样，那么 δ(x, z) ≥ δ(x, t)，和 δ(s, t) 对应着直径这一前提不符，故 y 的最远结点 z 不可能在 s 到 t 这个直径对应的路外面。
 
-    <img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree-diameter.svg">
+    <img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree-diameter.svg">
 
 因此定理成立。
 
diff --git a/solution/1200-1299/1245.Tree Diameter/README_EN.md b/solution/1200-1299/1245.Tree Diameter/README_EN.md
index 1d4c290a1fde3..0748e774b26a7 100644
--- a/solution/1200-1299/1245.Tree Diameter/README_EN.md	
+++ b/solution/1200-1299/1245.Tree Diameter/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree1.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree1.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> edges = [[0,1],[0,2]]
 <strong>Output:</strong> 2
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree2.jpg" style="width: 224px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1245.Tree%20Diameter/images/tree2.jpg" style="width: 224px; height: 225px;" />
 <pre>
 <strong>Input:</strong> edges = [[0,1],[1,2],[2,3],[1,4],[4,5]]
 <strong>Output:</strong> 4
diff --git a/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README.md b/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README.md
index ce3eef76c5cac..8c9b155b909bd 100644
--- a/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README.md	
+++ b/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e1.png" style="height: 118px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e1.png" style="height: 118px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>m = 2, n = 3, indices = [[0,1],[1,1]]
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e2.png" style="height: 150px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e2.png" style="height: 150px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>m = 2, n = 2, indices = [[1,1],[0,0]]
diff --git a/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README_EN.md b/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README_EN.md
index 6e1cf7dce7267..7776278caaa0f 100644
--- a/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README_EN.md	
+++ b/solution/1200-1299/1252.Cells with Odd Values in a Matrix/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e1.png" style="width: 600px; height: 118px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e1.png" style="width: 600px; height: 118px;" />
 <pre>
 <strong>Input:</strong> m = 2, n = 3, indices = [[0,1],[1,1]]
 <strong>Output:</strong> 6
@@ -27,7 +27,7 @@ The final matrix is [[1,3,1],[1,3,1]], which contains 6 odd numbers.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e2.png" style="width: 600px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1252.Cells%20with%20Odd%20Values%20in%20a%20Matrix/images/e2.png" style="width: 600px; height: 150px;" />
 <pre>
 <strong>Input:</strong> m = 2, n = 2, indices = [[1,1],[0,0]]
 <strong>Output:</strong> 0
diff --git a/solution/1200-1299/1254.Number of Closed Islands/README.md b/solution/1200-1299/1254.Number of Closed Islands/README.md
index fbe715ed5207f..54faa993272df 100644
--- a/solution/1200-1299/1254.Number of Closed Islands/README.md	
+++ b/solution/1200-1299/1254.Number of Closed Islands/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_3_1610.png" style="height: 151px; width: 240px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_3_1610.png" style="height: 151px; width: 240px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,1,1,1,1,1,1,0],[1,0,0,0,0,1,1,0],[1,0,1,0,1,1,1,0],[1,0,0,0,0,1,0,1],[1,1,1,1,1,1,1,0]]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_4_1610.png" style="height: 98px; width: 160px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_4_1610.png" style="height: 98px; width: 160px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[0,0,1,0,0],[0,1,0,1,0],[0,1,1,1,0]]
diff --git a/solution/1200-1299/1254.Number of Closed Islands/README_EN.md b/solution/1200-1299/1254.Number of Closed Islands/README_EN.md
index 14d7bc960ed08..ec5d9b1bcce4a 100644
--- a/solution/1200-1299/1254.Number of Closed Islands/README_EN.md	
+++ b/solution/1200-1299/1254.Number of Closed Islands/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_3_1610.png" style="width: 240px; height: 120px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_3_1610.png" style="width: 240px; height: 120px;" /></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,1,1,1,1,0],[1,0,0,0,0,1,1,0],[1,0,1,0,1,1,1,0],[1,0,0,0,0,1,0,1],[1,1,1,1,1,1,1,0]]
@@ -21,7 +21,7 @@ Islands in gray are closed because they are completely surrounded by water (grou
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_4_1610.png" style="width: 160px; height: 80px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1254.Number%20of%20Closed%20Islands/images/sample_4_1610.png" style="width: 160px; height: 80px;" /></p>
 
 <pre>
 <strong>Input:</strong> grid = [[0,0,1,0,0],[0,1,0,1,0],[0,1,1,1,0]]
diff --git a/solution/1200-1299/1256.Encode Number/README.md b/solution/1200-1299/1256.Encode Number/README.md
index 391a8090b5e5f..357842b6a73c2 100644
--- a/solution/1200-1299/1256.Encode Number/README.md	
+++ b/solution/1200-1299/1256.Encode Number/README.md	
@@ -10,7 +10,7 @@
 
 <p>加密的过程是把一个整数用某个未知函数进行转化，你需要从下表推测出该转化函数：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1256.Encode%20Number/images/encode_number.png" style="height: 360px; width: 164px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1256.Encode%20Number/images/encode_number.png" style="height: 360px; width: 164px;"></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/1200-1299/1256.Encode Number/README_EN.md b/solution/1200-1299/1256.Encode Number/README_EN.md
index 6bb9fbd7bddff..ff8a9f36749d1 100644
--- a/solution/1200-1299/1256.Encode Number/README_EN.md	
+++ b/solution/1200-1299/1256.Encode Number/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>The encoding is done by converting the integer to a string using a secret function that you should deduce from the following table:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1256.Encode%20Number/images/encode_number.png" style="width: 164px; height: 360px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1256.Encode%20Number/images/encode_number.png" style="width: 164px; height: 360px;" /></p>
 
 <p>&nbsp;</p>
 
diff --git a/solution/1200-1299/1259.Handshakes That Don't Cross/README.md b/solution/1200-1299/1259.Handshakes That Don't Cross/README.md
index 6e9431e681361..b2d824bcfc480 100644
--- a/solution/1200-1299/1259.Handshakes That Don't Cross/README.md	
+++ b/solution/1200-1299/1259.Handshakes That Don't Cross/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_2.png" style="height: 311px; width: 651px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_2.png" style="height: 311px; width: 651px;"></p>
 
 <pre><strong>输入：</strong>num_people = 4
 <strong>输出：</strong>2
@@ -31,7 +31,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_3.png" style="height: 992px; width: 664px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_3.png" style="height: 992px; width: 664px;"></p>
 
 <pre><strong>输入：</strong>num_people = 6
 <strong>输出：</strong>5
diff --git a/solution/1200-1299/1259.Handshakes That Don't Cross/README_EN.md b/solution/1200-1299/1259.Handshakes That Don't Cross/README_EN.md
index ea1ab7ba70126..6fcb932573904 100644
--- a/solution/1200-1299/1259.Handshakes That Don't Cross/README_EN.md	
+++ b/solution/1200-1299/1259.Handshakes That Don't Cross/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_2.png" style="width: 450px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_2.png" style="width: 450px; height: 215px;" />
 <pre>
 <strong>Input:</strong> numPeople = 4
 <strong>Output:</strong> 2
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_3.png" style="width: 335px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1259.Handshakes%20That%20Don%27t%20Cross/images/5125_example_3.png" style="width: 335px; height: 500px;" />
 <pre>
 <strong>Input:</strong> numPeople = 6
 <strong>Output:</strong> 5
diff --git a/solution/1200-1299/1260.Shift 2D Grid/README.md b/solution/1200-1299/1260.Shift 2D Grid/README.md
index ac0f20d72d4b7..5aa41a91ce092 100644
--- a/solution/1200-1299/1260.Shift 2D Grid/README.md	
+++ b/solution/1200-1299/1260.Shift 2D Grid/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e1-1.png" style="height: 158px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e1-1.png" style="height: 158px; width: 400px;" /></p>
 
 <pre>
 <code><strong>输入：</strong>grid</code> = [[1,2,3],[4,5,6],[7,8,9]], k = 1
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e2-1.png" style="height: 166px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e2-1.png" style="height: 166px; width: 400px;" /></p>
 
 <pre>
 <code><strong>输入：</strong>grid</code> = [[3,8,1,9],[19,7,2,5],[4,6,11,10],[12,0,21,13]], k = 4
diff --git a/solution/1200-1299/1260.Shift 2D Grid/README_EN.md b/solution/1200-1299/1260.Shift 2D Grid/README_EN.md
index 5a28706f67907..f5fafa46076c1 100644
--- a/solution/1200-1299/1260.Shift 2D Grid/README_EN.md	
+++ b/solution/1200-1299/1260.Shift 2D Grid/README_EN.md	
@@ -18,14 +18,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e1.png" style="width: 400px; height: 178px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e1.png" style="width: 400px; height: 178px;" />
 <pre>
 <strong>Input:</strong> <code>grid</code> = [[1,2,3],[4,5,6],[7,8,9]], k = 1
 <strong>Output:</strong> [[9,1,2],[3,4,5],[6,7,8]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e2.png" style="width: 400px; height: 166px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1260.Shift%202D%20Grid/images/e2.png" style="width: 400px; height: 166px;" />
 <pre>
 <strong>Input:</strong> <code>grid</code> = [[3,8,1,9],[19,7,2,5],[4,6,11,10],[12,0,21,13]], k = 4
 <strong>Output:</strong> [[12,0,21,13],[3,8,1,9],[19,7,2,5],[4,6,11,10]]
diff --git a/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README.md b/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README.md
index 11f48e7d8d6d4..619b6e4608ac9 100644
--- a/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README.md	
+++ b/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1.jpg" style="height: 119px; width: 320px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1.jpg" style="height: 119px; width: 320px;"></strong></p>
 
 <pre><strong>输入：</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;]
@@ -41,7 +41,7 @@ findElements.find(2); // return True </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4.jpg" style="height: 198px; width: 400px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4.jpg" style="height: 198px; width: 400px;"></strong></p>
 
 <pre><strong>输入：</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;]
@@ -56,7 +56,7 @@ findElements.find(5); // return False</pre>
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1-1.jpg" style="height: 274px; width: 306px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1-1.jpg" style="height: 274px; width: 306px;"></strong></p>
 
 <pre><strong>输入：</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;]
diff --git a/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README_EN.md b/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README_EN.md
index 3ca9a0d317e44..8d7a940f93e6b 100644
--- a/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README_EN.md	
+++ b/solution/1200-1299/1261.Find Elements in a Contaminated Binary Tree/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1.jpg" style="width: 320px; height: 119px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1.jpg" style="width: 320px; height: 119px;" />
 <pre>
 <strong>Input</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;]
@@ -36,7 +36,7 @@ findElements.find(1); // return False
 findElements.find(2); // return True </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4.jpg" style="width: 400px; height: 198px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4.jpg" style="width: 400px; height: 198px;" />
 <pre>
 <strong>Input</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;]
@@ -50,7 +50,7 @@ findElements.find(3); // return True
 findElements.find(5); // return False</pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1-1.jpg" style="width: 306px; height: 274px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1261.Find%20Elements%20in%20a%20Contaminated%20Binary%20Tree/images/untitled-diagram-4-1-1.jpg" style="width: 306px; height: 274px;" />
 <pre>
 <strong>Input</strong>
 [&quot;FindElements&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;,&quot;find&quot;]
diff --git a/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README.md b/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README.md
index 92bb9d1d80cec..2c21e761b7fbc 100644
--- a/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README.md	
+++ b/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1263.Minimum%20Moves%20to%20Move%20a%20Box%20to%20Their%20Target%20Location/images/sample_1_1620.png" style="height: 335px; width: 500px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1263.Minimum%20Moves%20to%20Move%20a%20Box%20to%20Their%20Target%20Location/images/sample_1_1620.png" style="height: 335px; width: 500px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>grid = [["#","#","#","#","#","#"],
diff --git a/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README_EN.md b/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README_EN.md
index a8fa4d4e0ed6c..2c4a2e93f0527 100644
--- a/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README_EN.md	
+++ b/solution/1200-1299/1263.Minimum Moves to Move a Box to Their Target Location/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1263.Minimum%20Moves%20to%20Move%20a%20Box%20to%20Their%20Target%20Location/images/sample_1_1620.png" style="width: 500px; height: 335px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1263.Minimum%20Moves%20to%20Move%20a%20Box%20to%20Their%20Target%20Location/images/sample_1_1620.png" style="width: 500px; height: 335px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;],
                [&quot;#&quot;,&quot;T&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;],
diff --git a/solution/1200-1299/1266.Minimum Time Visiting All Points/README.md b/solution/1200-1299/1266.Minimum Time Visiting All Points/README.md
index 4f250f5a0fc03..c4d012574cfd9 100644
--- a/solution/1200-1299/1266.Minimum Time Visiting All Points/README.md	
+++ b/solution/1200-1299/1266.Minimum Time Visiting All Points/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1266.Minimum%20Time%20Visiting%20All%20Points/images/1626_example_1.png" style="height: 428px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1266.Minimum%20Time%20Visiting%20All%20Points/images/1626_example_1.png" style="height: 428px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>points = [[1,1],[3,4],[-1,0]]
diff --git a/solution/1200-1299/1266.Minimum Time Visiting All Points/README_EN.md b/solution/1200-1299/1266.Minimum Time Visiting All Points/README_EN.md
index aec0e0ec37957..2b9a7b98f43a5 100644
--- a/solution/1200-1299/1266.Minimum Time Visiting All Points/README_EN.md	
+++ b/solution/1200-1299/1266.Minimum Time Visiting All Points/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1266.Minimum%20Time%20Visiting%20All%20Points/images/1626_example_1.png" style="width: 500px; height: 428px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1266.Minimum%20Time%20Visiting%20All%20Points/images/1626_example_1.png" style="width: 500px; height: 428px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[3,4],[-1,0]]
 <strong>Output:</strong> 7
diff --git a/solution/1200-1299/1267.Count Servers that Communicate/README.md b/solution/1200-1299/1267.Count Servers that Communicate/README.md
index 9de40414aa6d5..4f4d0c1e99f9a 100644
--- a/solution/1200-1299/1267.Count Servers that Communicate/README.md	
+++ b/solution/1200-1299/1267.Count Servers that Communicate/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-6.jpg" style="height: 203px; width: 202px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-6.jpg" style="height: 203px; width: 202px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,0],[0,1]]
 <strong>输出：</strong>0
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-4-1.jpg" style="height: 203px; width: 203px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-4-1.jpg" style="height: 203px; width: 203px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[1,0],[1,1]]
 <strong>输出：</strong>3
@@ -33,7 +33,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-1-3.jpg" style="height: 443px; width: 443px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-1-3.jpg" style="height: 443px; width: 443px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,1,0,0],[0,0,1,0],[0,0,1,0],[0,0,0,1]]
 <strong>输出：</strong>4
diff --git a/solution/1200-1299/1267.Count Servers that Communicate/README_EN.md b/solution/1200-1299/1267.Count Servers that Communicate/README_EN.md
index 8ba0b1ac6fe5e..bcda3d13ac6f4 100644
--- a/solution/1200-1299/1267.Count Servers that Communicate/README_EN.md	
+++ b/solution/1200-1299/1267.Count Servers that Communicate/README_EN.md	
@@ -11,7 +11,7 @@ Return the number of servers&nbsp;that communicate with any other server.</p>
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-6.jpg" style="width: 202px; height: 203px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-6.jpg" style="width: 202px; height: 203px;" /></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,0],[0,1]]
@@ -20,7 +20,7 @@ Return the number of servers&nbsp;that communicate with any other server.</p>
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-4.jpg" style="width: 203px; height: 203px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-4.jpg" style="width: 203px; height: 203px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,0],[1,1]]
@@ -30,7 +30,7 @@ Return the number of servers&nbsp;that communicate with any other server.</p>
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-1-3.jpg" style="width: 443px; height: 443px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1267.Count%20Servers%20that%20Communicate/images/untitled-diagram-1-3.jpg" style="width: 443px; height: 443px;" /></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,1,0,0],[0,0,1,0],[0,0,1,0],[0,0,0,1]]
diff --git a/solution/1200-1299/1272.Remove Interval/README.md b/solution/1200-1299/1272.Remove Interval/README.md
index 2778ad0f3e703..0e75924182c82 100644
--- a/solution/1200-1299/1272.Remove Interval/README.md	
+++ b/solution/1200-1299/1272.Remove Interval/README.md	
@@ -17,14 +17,14 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex1.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex1.png" />
 <pre>
 <strong>输入：</strong>intervals = [[0,2],[3,4],[5,7]], toBeRemoved = [1,6]
 <strong>输出：</strong>[[0,1],[6,7]]
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex2.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex2.png" />
 <pre>
 <strong>输入：</strong>intervals = [[0,5]], toBeRemoved = [2,3]
 <strong>输出：</strong>[[0,2],[3,5]]
diff --git a/solution/1200-1299/1272.Remove Interval/README_EN.md b/solution/1200-1299/1272.Remove Interval/README_EN.md
index 825d38a433bc8..02b2874324cff 100644
--- a/solution/1200-1299/1272.Remove Interval/README_EN.md	
+++ b/solution/1200-1299/1272.Remove Interval/README_EN.md	
@@ -12,14 +12,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex1.png" style="width: 510px; height: 319px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex1.png" style="width: 510px; height: 319px;" />
 <pre>
 <strong>Input:</strong> intervals = [[0,2],[3,4],[5,7]], toBeRemoved = [1,6]
 <strong>Output:</strong> [[0,1],[6,7]]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex2.png" style="width: 410px; height: 318px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1272.Remove%20Interval/images/removeintervalex2.png" style="width: 410px; height: 318px;" />
 <pre>
 <strong>Input:</strong> intervals = [[0,5]], toBeRemoved = [2,3]
 <strong>Output:</strong> [[0,2],[3,5]]
diff --git a/solution/1200-1299/1273.Delete Tree Nodes/README.md b/solution/1200-1299/1273.Delete Tree Nodes/README.md
index 54e61f5a50807..dc7e770d5b137 100644
--- a/solution/1200-1299/1273.Delete Tree Nodes/README.md	
+++ b/solution/1200-1299/1273.Delete Tree Nodes/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1273.Delete%20Tree%20Nodes/images/1421_sample_1.png" style="height: 347px; width: 403px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1273.Delete%20Tree%20Nodes/images/1421_sample_1.png" style="height: 347px; width: 403px;"></p>
 
 <pre><strong>输入：</strong>nodes = 7, parent = [-1,0,0,1,2,2,2], value = [1,-2,4,0,-2,-1,-1]
 <strong>输出：</strong>2
diff --git a/solution/1200-1299/1273.Delete Tree Nodes/README_EN.md b/solution/1200-1299/1273.Delete Tree Nodes/README_EN.md
index 1d5890f3f4e59..15465a2525d64 100644
--- a/solution/1200-1299/1273.Delete Tree Nodes/README_EN.md	
+++ b/solution/1200-1299/1273.Delete Tree Nodes/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1273.Delete%20Tree%20Nodes/images/1421_sample_1.png" style="width: 403px; height: 347px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1273.Delete%20Tree%20Nodes/images/1421_sample_1.png" style="width: 403px; height: 347px;" />
 <pre>
 <strong>Input:</strong> nodes = 7, parent = [-1,0,0,1,2,2,2], value = [1,-2,4,0,-2,-1,-1]
 <strong>Output:</strong> 2
diff --git a/solution/1200-1299/1274.Number of Ships in a Rectangle/README.md b/solution/1200-1299/1274.Number of Ships in a Rectangle/README.md
index 6991ddc0ef243..58e0aeecf9fd1 100644
--- a/solution/1200-1299/1274.Number of Ships in a Rectangle/README.md	
+++ b/solution/1200-1299/1274.Number of Ships in a Rectangle/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1274.Number%20of%20Ships%20in%20a%20Rectangle/images/1445_example_1.png" style="height: 500px; width: 496px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1274.Number%20of%20Ships%20in%20a%20Rectangle/images/1445_example_1.png" style="height: 500px; width: 496px;" /></p>
 
 <pre>
 <strong>输入：</strong>
diff --git a/solution/1200-1299/1274.Number of Ships in a Rectangle/README_EN.md b/solution/1200-1299/1274.Number of Ships in a Rectangle/README_EN.md
index 82d61db722aaa..62048fc34e5a6 100644
--- a/solution/1200-1299/1274.Number of Ships in a Rectangle/README_EN.md	
+++ b/solution/1200-1299/1274.Number of Ships in a Rectangle/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example :</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1274.Number%20of%20Ships%20in%20a%20Rectangle/images/1445_example_1.png" style="width: 496px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1274.Number%20of%20Ships%20in%20a%20Rectangle/images/1445_example_1.png" style="width: 496px; height: 500px;" />
 <pre>
 <strong>Input:</strong> 
 ships = [[1,1],[2,2],[3,3],[5,5]], topRight = [4,4], bottomLeft = [0,0]
diff --git a/solution/1200-1299/1275.Find Winner on a Tic Tac Toe Game/README_EN.md b/solution/1200-1299/1275.Find Winner on a Tic Tac Toe Game/README_EN.md
index 3262cafef90a3..90e09ef880f20 100644
--- a/solution/1200-1299/1275.Find Winner on a Tic Tac Toe Game/README_EN.md	
+++ b/solution/1200-1299/1275.Find Winner on a Tic Tac Toe Game/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo1-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo1-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> moves = [[0,0],[2,0],[1,1],[2,1],[2,2]]
 <strong>Output:</strong> &quot;A&quot;
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo2-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo2-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> moves = [[0,0],[1,1],[0,1],[0,2],[1,0],[2,0]]
 <strong>Output:</strong> &quot;B&quot;
@@ -37,7 +37,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo3-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1275.Find%20Winner%20on%20a%20Tic%20Tac%20Toe%20Game/images/xo3-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> moves = [[0,0],[1,1],[2,0],[1,0],[1,2],[2,1],[0,1],[0,2],[2,2]]
 <strong>Output:</strong> &quot;Draw&quot;
diff --git a/solution/1200-1299/1279.Traffic Light Controlled Intersection/README.md b/solution/1200-1299/1279.Traffic Light Controlled Intersection/README.md
index c2c973cb1844e..05cd8e6b7fd1e 100644
--- a/solution/1200-1299/1279.Traffic Light Controlled Intersection/README.md	
+++ b/solution/1200-1299/1279.Traffic Light Controlled Intersection/README.md	
@@ -8,7 +8,7 @@
 
 <p>这是两条路的交叉路口。第一条路是 A 路，车辆可沿&nbsp;1 号方向由北向南行驶，也可沿&nbsp;2 号方向由南向北行驶。第二条路是 B 路，车辆可沿&nbsp;3 号方向由西向东行驶，也可沿 4 号方向由东向西行驶。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1279.Traffic%20Light%20Controlled%20Intersection/images/exp.png" style="height:417px; width:600px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1279.Traffic%20Light%20Controlled%20Intersection/images/exp.png" style="height:417px; width:600px" /></p>
 
 <p>每条路在路口前都有一个红绿灯。红绿灯可以亮起红灯或绿灯。</p>
 
diff --git a/solution/1200-1299/1279.Traffic Light Controlled Intersection/README_EN.md b/solution/1200-1299/1279.Traffic Light Controlled Intersection/README_EN.md
index f3684ca1bad30..adc6e2e7a687a 100644
--- a/solution/1200-1299/1279.Traffic Light Controlled Intersection/README_EN.md	
+++ b/solution/1200-1299/1279.Traffic Light Controlled Intersection/README_EN.md	
@@ -6,7 +6,7 @@
 
 <p>There is an intersection of two roads. First road is road A where cars travel&nbsp;from North to South in direction 1 and from South to North in direction 2. Second road is road B where cars travel from West to East in direction 3 and from East to West in direction 4.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1279.Traffic%20Light%20Controlled%20Intersection/images/exp.png" style="width: 600px; height: 417px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1279.Traffic%20Light%20Controlled%20Intersection/images/exp.png" style="width: 600px; height: 417px;" /></p>
 
 <p>There is a traffic light&nbsp;located on each road before the intersection. A traffic light&nbsp;can&nbsp;either be green or red.</p>
 
diff --git a/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README.md b/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README.md
index dbce8c7ba704a..800a4850e760e 100644
--- a/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README.md	
+++ b/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例&nbsp;1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1284.Minimum%20Number%20of%20Flips%20to%20Convert%20Binary%20Matrix%20to%20Zero%20Matrix/images/matrix.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1284.Minimum%20Number%20of%20Flips%20to%20Convert%20Binary%20Matrix%20to%20Zero%20Matrix/images/matrix.png" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[0,0],[0,1]]
diff --git a/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README_EN.md b/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README_EN.md
index 0ceacfd064ca8..7a56c5a7fd60b 100644
--- a/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README_EN.md	
+++ b/solution/1200-1299/1284.Minimum Number of Flips to Convert Binary Matrix to Zero Matrix/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1284.Minimum%20Number%20of%20Flips%20to%20Convert%20Binary%20Matrix%20to%20Zero%20Matrix/images/matrix.png" style="width: 409px; height: 86px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1284.Minimum%20Number%20of%20Flips%20to%20Convert%20Binary%20Matrix%20to%20Zero%20Matrix/images/matrix.png" style="width: 409px; height: 86px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0],[0,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1200-1299/1289.Minimum Falling Path Sum II/README.md b/solution/1200-1299/1289.Minimum Falling Path Sum II/README.md
index 8a8fa8492a6d0..4b17871de32e0 100644
--- a/solution/1200-1299/1289.Minimum Falling Path Sum II/README.md	
+++ b/solution/1200-1299/1289.Minimum Falling Path Sum II/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1289.Minimum%20Falling%20Path%20Sum%20II/images/falling-grid.jpg" style="width: 244px; height: 245px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1289.Minimum%20Falling%20Path%20Sum%20II/images/falling-grid.jpg" style="width: 244px; height: 245px;" /></p>
 
 <pre>
 <strong>输入：</strong>arr = [[1,2,3],[4,5,6],[7,8,9]]
diff --git a/solution/1200-1299/1289.Minimum Falling Path Sum II/README_EN.md b/solution/1200-1299/1289.Minimum Falling Path Sum II/README_EN.md
index 46d4f29305176..ff851779c3e20 100644
--- a/solution/1200-1299/1289.Minimum Falling Path Sum II/README_EN.md	
+++ b/solution/1200-1299/1289.Minimum Falling Path Sum II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1289.Minimum%20Falling%20Path%20Sum%20II/images/falling-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1289.Minimum%20Falling%20Path%20Sum%20II/images/falling-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> arr = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> 13
diff --git a/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README.md b/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README.md
index 03dc803673216..03b0f330d0fb5 100644
--- a/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README.md	
+++ b/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1290.Convert%20Binary%20Number%20in%20a%20Linked%20List%20to%20Integer/images/graph-1.png" style="height: 108px; width: 426px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1290.Convert%20Binary%20Number%20in%20a%20Linked%20List%20to%20Integer/images/graph-1.png" style="height: 108px; width: 426px;"></p>
 
 <pre><strong>输入：</strong>head = [1,0,1]
 <strong>输出：</strong>5
diff --git a/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README_EN.md b/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README_EN.md
index 70e43e09844cc..2fdabde7346e9 100644
--- a/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README_EN.md	
+++ b/solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1290.Convert%20Binary%20Number%20in%20a%20Linked%20List%20to%20Integer/images/graph-1.png" style="width: 426px; height: 108px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1290.Convert%20Binary%20Number%20in%20a%20Linked%20List%20to%20Integer/images/graph-1.png" style="width: 426px; height: 108px;" />
 <pre>
 <strong>Input:</strong> head = [1,0,1]
 <strong>Output:</strong> 5
diff --git a/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README.md b/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README.md
index 4d835579817a2..efefdbd2585c7 100644
--- a/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README.md	
+++ b/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README.md	
@@ -13,7 +13,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1292.Maximum%20Side%20Length%20of%20a%20Square%20with%20Sum%20Less%20than%20or%20Equal%20to%20Threshold/images/e1.png" style="height: 186px; width: 335px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1292.Maximum%20Side%20Length%20of%20a%20Square%20with%20Sum%20Less%20than%20or%20Equal%20to%20Threshold/images/e1.png" style="height: 186px; width: 335px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[1,1,3,2,4,3,2],[1,1,3,2,4,3,2],[1,1,3,2,4,3,2]], threshold = 4
diff --git a/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README_EN.md b/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README_EN.md
index 477d682f78f70..5bb7994d35ecf 100644
--- a/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README_EN.md	
+++ b/solution/1200-1299/1292.Maximum Side Length of a Square with Sum Less than or Equal to Threshold/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1292.Maximum%20Side%20Length%20of%20a%20Square%20with%20Sum%20Less%20than%20or%20Equal%20to%20Threshold/images/e1.png" style="width: 335px; height: 186px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1292.Maximum%20Side%20Length%20of%20a%20Square%20with%20Sum%20Less%20than%20or%20Equal%20to%20Threshold/images/e1.png" style="width: 335px; height: 186px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,1,3,2,4,3,2],[1,1,3,2,4,3,2],[1,1,3,2,4,3,2]], threshold = 4
 <strong>Output:</strong> 2
diff --git a/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README.md b/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README.md
index 3609811937fb2..e57ea013fc44d 100644
--- a/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README.md	
+++ b/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short1-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong> grid = [[0,0,0],[1,1,0],[0,0,0],[0,1,1],[0,0,0]], k = 1
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short2-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[0,1,1],[1,1,1],[1,0,0]], k = 1
diff --git a/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README_EN.md b/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README_EN.md
index 0f72df5c266eb..47b6098314fb9 100644
--- a/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README_EN.md	
+++ b/solution/1200-1299/1293.Shortest Path in a Grid with Obstacles Elimination/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short1-grid.jpg" style="width: 244px; height: 405px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short1-grid.jpg" style="width: 244px; height: 405px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0],[1,1,0],[0,0,0],[0,1,1],[0,0,0]], k = 1
 <strong>Output:</strong> 6
@@ -20,7 +20,7 @@ The shortest path with one obstacle elimination at position (3,2) is 6. Such pat
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short2-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1200-1299/1293.Shortest%20Path%20in%20a%20Grid%20with%20Obstacles%20Elimination/images/short2-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,1],[1,1,1],[1,0,0]], k = 1
 <strong>Output:</strong> -1
diff --git a/solution/1300-1399/1302.Deepest Leaves Sum/README.md b/solution/1300-1399/1302.Deepest Leaves Sum/README.md
index 26e418ce3ee87..807b70f3ec4e6 100644
--- a/solution/1300-1399/1302.Deepest Leaves Sum/README.md	
+++ b/solution/1300-1399/1302.Deepest Leaves Sum/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1302.Deepest%20Leaves%20Sum/images/1483_ex1.png" style="height: 265px; width: 273px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1302.Deepest%20Leaves%20Sum/images/1483_ex1.png" style="height: 265px; width: 273px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,4,5,null,6,7,null,null,null,null,8]
diff --git a/solution/1300-1399/1302.Deepest Leaves Sum/README_EN.md b/solution/1300-1399/1302.Deepest Leaves Sum/README_EN.md
index b2c5d4fbccea8..34f37c38371c8 100644
--- a/solution/1300-1399/1302.Deepest Leaves Sum/README_EN.md	
+++ b/solution/1300-1399/1302.Deepest Leaves Sum/README_EN.md	
@@ -8,7 +8,7 @@ Given the <code>root</code> of a binary tree, return <em>the sum of values of it
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1302.Deepest%20Leaves%20Sum/images/1483_ex1.png" style="width: 273px; height: 265px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1302.Deepest%20Leaves%20Sum/images/1483_ex1.png" style="width: 273px; height: 265px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,null,6,7,null,null,null,null,8]
 <strong>Output:</strong> 15
diff --git a/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README.md b/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README.md
index a8254949bc8bc..87cfc0e51a601 100644
--- a/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README.md	
+++ b/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e1.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e1.png" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [2,1,4], root2 = [1,0,3]
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e5-.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e5-.png" /></p>
 
 <pre>
 <strong>输入：</strong>root1 = [1,null,8], root2 = [8,1]
diff --git a/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README_EN.md b/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README_EN.md
index feb09c71e6be7..00e0f99edd5dc 100644
--- a/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README_EN.md	
+++ b/solution/1300-1399/1305.All Elements in Two Binary Search Trees/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e1.png" style="width: 457px; height: 207px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e1.png" style="width: 457px; height: 207px;" />
 <pre>
 <strong>Input:</strong> root1 = [2,1,4], root2 = [1,0,3]
 <strong>Output:</strong> [0,1,1,2,3,4]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e5-.png" style="width: 352px; height: 197px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1305.All%20Elements%20in%20Two%20Binary%20Search%20Trees/images/q2-e5-.png" style="width: 352px; height: 197px;" />
 <pre>
 <strong>Input:</strong> root1 = [1,null,8], root2 = [8,1]
 <strong>Output:</strong> [1,1,8,8]
diff --git a/solution/1300-1399/1311.Get Watched Videos by Your Friends/README.md b/solution/1300-1399/1311.Get Watched Videos by Your Friends/README.md
index 890e82879bd3d..3afce05e4694e 100644
--- a/solution/1300-1399/1311.Get Watched Videos by Your Friends/README.md	
+++ b/solution/1300-1399/1311.Get Watched Videos by Your Friends/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_1.png" style="height: 179px; width: 129px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_1.png" style="height: 179px; width: 129px;"></strong></p>
 
 <pre><strong>输入：</strong>watchedVideos = [[&quot;A&quot;,&quot;B&quot;],[&quot;C&quot;],[&quot;B&quot;,&quot;C&quot;],[&quot;D&quot;]], friends = [[1,2],[0,3],[0,3],[1,2]], id = 0, level = 1
 <strong>输出：</strong>[&quot;B&quot;,&quot;C&quot;] 
@@ -33,7 +33,7 @@ C -&gt; 2
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_2.png" style="height: 179px; width: 129px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_2.png" style="height: 179px; width: 129px;"></strong></p>
 
 <pre><strong>输入：</strong>watchedVideos = [[&quot;A&quot;,&quot;B&quot;],[&quot;C&quot;],[&quot;B&quot;,&quot;C&quot;],[&quot;D&quot;]], friends = [[1,2],[0,3],[0,3],[1,2]], id = 0, level = 2
 <strong>输出：</strong>[&quot;D&quot;]
diff --git a/solution/1300-1399/1311.Get Watched Videos by Your Friends/README_EN.md b/solution/1300-1399/1311.Get Watched Videos by Your Friends/README_EN.md
index 6dd77006bd4db..d5f47288b9f2e 100644
--- a/solution/1300-1399/1311.Get Watched Videos by Your Friends/README_EN.md	
+++ b/solution/1300-1399/1311.Get Watched Videos by Your Friends/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_1.png" style="width: 144px; height: 200px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_1.png" style="width: 144px; height: 200px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> watchedVideos = [[&quot;A&quot;,&quot;B&quot;],[&quot;C&quot;],[&quot;B&quot;,&quot;C&quot;],[&quot;D&quot;]], friends = [[1,2],[0,3],[0,3],[1,2]], id = 0, level = 1
@@ -27,7 +27,7 @@ C -&gt; 2
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_2.png" style="width: 144px; height: 200px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1311.Get%20Watched%20Videos%20by%20Your%20Friends/images/leetcode_friends_2.png" style="width: 144px; height: 200px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> watchedVideos = [[&quot;A&quot;,&quot;B&quot;],[&quot;C&quot;],[&quot;B&quot;,&quot;C&quot;],[&quot;D&quot;]], friends = [[1,2],[0,3],[0,3],[1,2]], id = 0, level = 2
diff --git a/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README.md b/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README.md
index dd7b6d909b368..dd6c852bef489 100644
--- a/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README.md	
+++ b/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/1473_ex1.png" style="height: 214px; width: 350px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/1473_ex1.png" style="height: 214px; width: 350px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [6,7,8,2,7,1,3,9,null,1,4,null,null,null,5]
 <strong>输出：</strong>18
diff --git a/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README_EN.md b/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README_EN.md
index d3e17fe5eb991..f2b4fa2e1eb19 100644
--- a/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README_EN.md	
+++ b/solution/1300-1399/1315.Sum of Nodes with Even-Valued Grandparent/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/even1-tree.jpg" style="width: 504px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/even1-tree.jpg" style="width: 504px; height: 302px;" />
 <pre>
 <strong>Input:</strong> root = [6,7,8,2,7,1,3,9,null,1,4,null,null,null,5]
 <strong>Output:</strong> 18
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/even2-tree.jpg" style="width: 64px; height: 65px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1315.Sum%20of%20Nodes%20with%20Even-Valued%20Grandparent/images/even2-tree.jpg" style="width: 64px; height: 65px;" />
 <pre>
 <strong>Input:</strong> root = [1]
 <strong>Output:</strong> 0
diff --git a/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README.md b/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README.md
index 20da99ad70767..ae5bf043d6967 100644
--- a/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README.md	
+++ b/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1318.Minimum%20Flips%20to%20Make%20a%20OR%20b%20Equal%20to%20c/images/sample_3_1676.png" style="height: 87px; width: 260px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1318.Minimum%20Flips%20to%20Make%20a%20OR%20b%20Equal%20to%20c/images/sample_3_1676.png" style="height: 87px; width: 260px;"></p>
 
 <pre><strong>输入：</strong>a = 2, b = 6, c = 5
 <strong>输出：</strong>3
diff --git a/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README_EN.md b/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README_EN.md
index 9a7f9dd526993..8e3bbf55feec0 100644
--- a/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README_EN.md	
+++ b/solution/1300-1399/1318.Minimum Flips to Make a OR b Equal to c/README_EN.md	
@@ -12,7 +12,7 @@ Flip operation&nbsp;consists of change&nbsp;<strong>any</strong>&nbsp;single bit
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1318.Minimum%20Flips%20to%20Make%20a%20OR%20b%20Equal%20to%20c/images/sample_3_1676.png" style="width: 260px; height: 87px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1318.Minimum%20Flips%20to%20Make%20a%20OR%20b%20Equal%20to%20c/images/sample_3_1676.png" style="width: 260px; height: 87px;" /></p>
 
 <pre>
 
diff --git a/solution/1300-1399/1319.Number of Operations to Make Network Connected/README.md b/solution/1300-1399/1319.Number of Operations to Make Network Connected/README.md
index 7275e935ea8c8..41e00ba11a99d 100644
--- a/solution/1300-1399/1319.Number of Operations to Make Network Connected/README.md	
+++ b/solution/1300-1399/1319.Number of Operations to Make Network Connected/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_1_1677.png" style="height: 167px; width: 570px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_1_1677.png" style="height: 167px; width: 570px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, connections = [[0,1],[0,2],[1,2]]
 <strong>输出：</strong>1
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_2_1677.png" style="height: 175px; width: 660px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_2_1677.png" style="height: 175px; width: 660px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 6, connections = [[0,1],[0,2],[0,3],[1,2],[1,3]]
 <strong>输出：</strong>2
diff --git a/solution/1300-1399/1319.Number of Operations to Make Network Connected/README_EN.md b/solution/1300-1399/1319.Number of Operations to Make Network Connected/README_EN.md
index 83e0eeda2ad4f..dc9d23bd223c2 100644
--- a/solution/1300-1399/1319.Number of Operations to Make Network Connected/README_EN.md	
+++ b/solution/1300-1399/1319.Number of Operations to Make Network Connected/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_1_1677.png" style="width: 500px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_1_1677.png" style="width: 500px; height: 148px;" />
 <pre>
 <strong>Input:</strong> n = 4, connections = [[0,1],[0,2],[1,2]]
 <strong>Output:</strong> 1
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_2_1677.png" style="width: 500px; height: 129px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1319.Number%20of%20Operations%20to%20Make%20Network%20Connected/images/sample_2_1677.png" style="width: 500px; height: 129px;" />
 <pre>
 <strong>Input:</strong> n = 6, connections = [[0,1],[0,2],[0,3],[1,2],[1,3]]
 <strong>Output:</strong> 2
diff --git a/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README.md b/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README.md
index 01ab46a77042d..9448749593d06 100644
--- a/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README.md	
+++ b/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README.md	
@@ -6,7 +6,7 @@
 
 <!-- 这里写题目描述 -->
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1320.Minimum%20Distance%20to%20Type%20a%20Word%20Using%20Two%20Fingers/images/leetcode_keyboard.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1320.Minimum%20Distance%20to%20Type%20a%20Word%20Using%20Two%20Fingers/images/leetcode_keyboard.png" /></p>
 
 <p>二指输入法定制键盘在 <strong>X-Y</strong> 平面上的布局如上图所示，其中每个大写英文字母都位于某个坐标处。</p>
 
diff --git a/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README_EN.md b/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README_EN.md
index e19edcc304e48..c2ffb34048fe5 100644
--- a/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README_EN.md	
+++ b/solution/1300-1399/1320.Minimum Distance to Type a Word Using Two Fingers/README_EN.md	
@@ -4,7 +4,7 @@
 
 ## Description
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1320.Minimum%20Distance%20to%20Type%20a%20Word%20Using%20Two%20Fingers/images/leetcode_keyboard.png" style="width: 349px; height: 209px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1320.Minimum%20Distance%20to%20Type%20a%20Word%20Using%20Two%20Fingers/images/leetcode_keyboard.png" style="width: 349px; height: 209px;" />
 <p>You have a keyboard layout as shown above in the <strong>X-Y</strong> plane, where each English uppercase letter is located at some coordinate.</p>
 
 <ul>
diff --git a/solution/1300-1399/1322.Ads Performance/README.md b/solution/1300-1399/1322.Ads Performance/README.md
index 6f955c8921ec0..98c2f98bf82db 100644
--- a/solution/1300-1399/1322.Ads Performance/README.md	
+++ b/solution/1300-1399/1322.Ads Performance/README.md	
@@ -26,7 +26,7 @@ action 列是一个枚举类型 (&#39;Clicked&#39;, &#39;Viewed&#39;, &#39;Ignor
 
 <p>广告效果用点击通过率（Click-Through Rate：CTR）来衡量，公式如下:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1322.Ads%20Performance/images/sql1.png" style="height: 75px; width: 600px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1322.Ads%20Performance/images/sql1.png" style="height: 75px; width: 600px;"></p>
 
 <p>写一条SQL语句来查询每一条广告的&nbsp;<code>ctr</code>&nbsp;，</p>
 
diff --git a/solution/1300-1399/1322.Ads Performance/README_EN.md b/solution/1300-1399/1322.Ads Performance/README_EN.md
index 5980d08a28ee9..38fbd18cc4e90 100644
--- a/solution/1300-1399/1322.Ads Performance/README_EN.md	
+++ b/solution/1300-1399/1322.Ads Performance/README_EN.md	
@@ -24,7 +24,7 @@ The action column is an ENUM type of (&#39;Clicked&#39;, &#39;Viewed&#39;, &#39;
 <p>A company is running Ads and wants to calculate the performance of each Ad.</p>
 
 <p>Performance of the Ad is measured using Click-Through Rate (CTR) where:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1322.Ads%20Performance/images/sql1.png" style="width: 600px; height: 54px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1322.Ads%20Performance/images/sql1.png" style="width: 600px; height: 54px;" />
 <p>Write an SQL query to find the <code>ctr</code> of each Ad. <strong>Round</strong> <code>ctr</code> to <strong>two decimal points</strong>.</p>
 
 <p>Return the result table ordered by <code>ctr</code> in <strong>descending order</strong> and by <code>ad_id</code> in <strong>ascending order</strong> in case of a tie.</p>
diff --git a/solution/1300-1399/1325.Delete Leaves With a Given Value/README.md b/solution/1300-1399/1325.Delete Leaves With a Given Value/README.md
index 83483daf95e33..893654e2819c6 100644
--- a/solution/1300-1399/1325.Delete Leaves With a Given Value/README.md	
+++ b/solution/1300-1399/1325.Delete Leaves With a Given Value/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_1_1684.png" style="height: 120px; width: 550px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_1_1684.png" style="height: 120px; width: 550px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,2,3,2,null,2,4], target = 2
 <strong>输出：</strong>[1,null,3,null,4]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_2_1684.png" style="height: 120px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_2_1684.png" style="height: 120px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,3,3,3,2], target = 3
 <strong>输出：</strong>[1,3,null,null,2]
@@ -35,7 +35,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_3_1684.png" style="width: 450px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_3_1684.png" style="width: 450px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,2,null,2,null,2], target = 2
 <strong>输出：</strong>[1]
diff --git a/solution/1300-1399/1325.Delete Leaves With a Given Value/README_EN.md b/solution/1300-1399/1325.Delete Leaves With a Given Value/README_EN.md
index d4af1a8b26359..f02c038a17d73 100644
--- a/solution/1300-1399/1325.Delete Leaves With a Given Value/README_EN.md	
+++ b/solution/1300-1399/1325.Delete Leaves With a Given Value/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_1_1684.png" style="width: 500px; height: 112px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_1_1684.png" style="width: 500px; height: 112px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [1,2,3,2,null,2,4], target = 2
@@ -22,7 +22,7 @@ After removing, new nodes become leaf nodes with value (target = 2) (Picture in
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_2_1684.png" style="width: 400px; height: 154px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_2_1684.png" style="width: 400px; height: 154px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [1,3,3,3,2], target = 3
@@ -31,7 +31,7 @@ After removing, new nodes become leaf nodes with value (target = 2) (Picture in
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_3_1684.png" style="width: 500px; height: 166px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1325.Delete%20Leaves%20With%20a%20Given%20Value/images/sample_3_1684.png" style="width: 500px; height: 166px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [1,2,null,2,null,2], target = 2
diff --git a/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README.md b/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README.md
index 855479aa5560d..a328d29e2c61e 100644
--- a/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README.md	
+++ b/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1326.Minimum%20Number%20of%20Taps%20to%20Open%20to%20Water%20a%20Garden/images/1685_example_1.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1326.Minimum%20Number%20of%20Taps%20to%20Open%20to%20Water%20a%20Garden/images/1685_example_1.png" /></p>
 
 <pre>
 <strong>输入：</strong>n = 5, ranges = [3,4,1,1,0,0]
diff --git a/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README_EN.md b/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README_EN.md
index 598510b8c1ea8..af65327b76c6c 100644
--- a/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README_EN.md	
+++ b/solution/1300-1399/1326.Minimum Number of Taps to Open to Water a Garden/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1326.Minimum%20Number%20of%20Taps%20to%20Open%20to%20Water%20a%20Garden/images/1685_example_1.png" style="width: 525px; height: 255px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1326.Minimum%20Number%20of%20Taps%20to%20Open%20to%20Water%20a%20Garden/images/1685_example_1.png" style="width: 525px; height: 255px;" />
 <pre>
 <strong>Input:</strong> n = 5, ranges = [3,4,1,1,0,0]
 <strong>Output:</strong> 1
diff --git a/solution/1300-1399/1329.Sort the Matrix Diagonally/README.md b/solution/1300-1399/1329.Sort the Matrix Diagonally/README.md
index bfab16745cfd6..4d8a833e3a2da 100644
--- a/solution/1300-1399/1329.Sort the Matrix Diagonally/README.md	
+++ b/solution/1300-1399/1329.Sort the Matrix Diagonally/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1329.Sort%20the%20Matrix%20Diagonally/images/1482_example_1_2.png" style="height: 198px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1329.Sort%20the%20Matrix%20Diagonally/images/1482_example_1_2.png" style="height: 198px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[3,3,1,1],[2,2,1,2],[1,1,1,2]]
diff --git a/solution/1300-1399/1329.Sort the Matrix Diagonally/README_EN.md b/solution/1300-1399/1329.Sort the Matrix Diagonally/README_EN.md
index e91c8a6217da9..630614ec45c7e 100644
--- a/solution/1300-1399/1329.Sort the Matrix Diagonally/README_EN.md	
+++ b/solution/1300-1399/1329.Sort the Matrix Diagonally/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1329.Sort%20the%20Matrix%20Diagonally/images/1482_example_1_2.png" style="width: 500px; height: 198px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1329.Sort%20the%20Matrix%20Diagonally/images/1482_example_1_2.png" style="width: 500px; height: 198px;" />
 <pre>
 <strong>Input:</strong> mat = [[3,3,1,1],[2,2,1,2],[1,1,1,2]]
 <strong>Output:</strong> [[1,1,1,1],[1,2,2,2],[1,2,3,3]]
diff --git a/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README.md b/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README.md
index 7c9f3173bbb3e..1c8648d1ec894 100644
--- a/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README.md	
+++ b/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_01.png" style="height: 225px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_01.png" style="height: 225px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, edges = [[0,1,3],[1,2,1],[1,3,4],[2,3,1]], distanceThreshold = 4
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_02.png" style="height: 225px; width: 300px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_02.png" style="height: 225px; width: 300px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 5, edges = [[0,1,2],[0,4,8],[1,2,3],[1,4,2],[2,3,1],[3,4,1]], distanceThreshold = 2
diff --git a/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README_EN.md b/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README_EN.md
index 892c24a5d4fa5..3fc900a324bb9 100644
--- a/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README_EN.md	
+++ b/solution/1300-1399/1334.Find the City With the Smallest Number of Neighbors at a Threshold Distance/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_01.png" style="width: 300px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_01.png" style="width: 300px; height: 225px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[0,1,3],[1,2,1],[1,3,4],[2,3,1]], distanceThreshold = 4
 <strong>Output:</strong> 3
@@ -26,7 +26,7 @@ Cities 0 and 3 have 2 neighboring cities at a distanceThreshold = 4, but we have
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_02.png" style="width: 300px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1334.Find%20the%20City%20With%20the%20Smallest%20Number%20of%20Neighbors%20at%20a%20Threshold%20Distance/images/find_the_city_02.png" style="width: 300px; height: 225px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1,2],[0,4,8],[1,2,3],[1,4,2],[2,3,1],[3,4,1]], distanceThreshold = 2
 <strong>Output:</strong> 0
diff --git a/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README.md b/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README.md
index 88db7480ddee2..65533c42b36f2 100644
--- a/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README.md	
+++ b/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1335.Minimum%20Difficulty%20of%20a%20Job%20Schedule/images/untitled.png" style="height: 304px; width: 365px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1335.Minimum%20Difficulty%20of%20a%20Job%20Schedule/images/untitled.png" style="height: 304px; width: 365px;"></p>
 
 <pre><strong>输入：</strong>jobDifficulty = [6,5,4,3,2,1], d = 2
 <strong>输出：</strong>7
diff --git a/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README_EN.md b/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README_EN.md
index 56aa07868c7c6..b1d7172ccb491 100644
--- a/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README_EN.md	
+++ b/solution/1300-1399/1335.Minimum Difficulty of a Job Schedule/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1335.Minimum%20Difficulty%20of%20a%20Job%20Schedule/images/untitled.png" style="width: 365px; height: 370px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1335.Minimum%20Difficulty%20of%20a%20Job%20Schedule/images/untitled.png" style="width: 365px; height: 370px;" />
 <pre>
 <strong>Input:</strong> jobDifficulty = [6,5,4,3,2,1], d = 2
 <strong>Output:</strong> 7
diff --git a/solution/1300-1399/1336.Number of Transactions per Visit/README.md b/solution/1300-1399/1336.Number of Transactions per Visit/README.md
index ca5c5793cb0e7..e06f827bc05f5 100644
--- a/solution/1300-1399/1336.Number of Transactions per Visit/README.md	
+++ b/solution/1300-1399/1336.Number of Transactions per Visit/README.md	
@@ -100,7 +100,7 @@
 * 对于 transactions_count &gt;= 4, 没有客户访问银行进行了超过3次交易，所以我们停止在 transactions_count = 3 。
 
 如下是这个例子的图表：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/images/chart.png" style="height:359px; width:600px" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/images/chart.png" style="height:359px; width:600px" />
 </pre>
 
 ## 解法
diff --git a/solution/1300-1399/1336.Number of Transactions per Visit/README_EN.md b/solution/1300-1399/1336.Number of Transactions per Visit/README_EN.md
index ee51610a9a2e2..4bb926287e64b 100644
--- a/solution/1300-1399/1336.Number of Transactions per Visit/README_EN.md	
+++ b/solution/1300-1399/1336.Number of Transactions per Visit/README_EN.md	
@@ -55,7 +55,7 @@ It is guaranteed that the user has visited the bank in the transaction_date.(i.e
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/images/chart.png" style="width: 500px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1336.Number%20of%20Transactions%20per%20Visit/images/chart.png" style="width: 500px; height: 299px;" />
 <pre>
 <strong>Input:</strong> 
 Visits table:
diff --git a/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README.md b/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README.md
index 1817e79f7a5f8..411a449cfc77e 100644
--- a/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README.md	
+++ b/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_1_1699.png" style="height: 200px; width: 495px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_1_1699.png" style="height: 200px; width: 495px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,2,3,4,5,6]
 <strong>输出：</strong>110
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_2_1699.png" style="height: 200px; width: 495px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_2_1699.png" style="height: 200px; width: 495px;"></p>
 
 <pre><strong>输入：</strong>root = [1,null,2,3,4,null,null,5,6]
 <strong>输出：</strong>90
diff --git a/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README_EN.md b/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README_EN.md
index d7b0fcc81f9c7..ab20d36d43a40 100644
--- a/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README_EN.md	
+++ b/solution/1300-1399/1339.Maximum Product of Splitted Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_1_1699.png" style="width: 500px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_1_1699.png" style="width: 500px; height: 167px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6]
 <strong>Output:</strong> 110
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_2_1699.png" style="width: 500px; height: 211px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1339.Maximum%20Product%20of%20Splitted%20Binary%20Tree/images/sample_2_1699.png" style="width: 500px; height: 211px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,null,null,5,6]
 <strong>Output:</strong> 90
diff --git a/solution/1300-1399/1340.Jump Game V/README.md b/solution/1300-1399/1340.Jump Game V/README.md
index a360b7e7db3a6..7379c4472c2cc 100644
--- a/solution/1300-1399/1340.Jump Game V/README.md	
+++ b/solution/1300-1399/1340.Jump Game V/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1340.Jump%20Game%20V/images/meta-chart.jpeg" style="height: 419px; width: 633px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1340.Jump%20Game%20V/images/meta-chart.jpeg" style="height: 419px; width: 633px;"></p>
 
 <pre><strong>输入：</strong>arr = [6,4,14,6,8,13,9,7,10,6,12], d = 2
 <strong>输出：</strong>4
diff --git a/solution/1300-1399/1340.Jump Game V/README_EN.md b/solution/1300-1399/1340.Jump Game V/README_EN.md
index e23485dc844db..00e6fa9c3e274 100644
--- a/solution/1300-1399/1340.Jump Game V/README_EN.md	
+++ b/solution/1300-1399/1340.Jump Game V/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1340.Jump%20Game%20V/images/meta-chart.jpeg" style="width: 633px; height: 419px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1340.Jump%20Game%20V/images/meta-chart.jpeg" style="width: 633px; height: 419px;" />
 <pre>
 <strong>Input:</strong> arr = [6,4,14,6,8,13,9,7,10,6,12], d = 2
 <strong>Output:</strong> 4
diff --git a/solution/1300-1399/1344.Angle Between Hands of a Clock/README.md b/solution/1300-1399/1344.Angle Between Hands of a Clock/README.md
index f4891eccd4663..d107555e9e51e 100644
--- a/solution/1300-1399/1344.Angle Between Hands of a Clock/README.md	
+++ b/solution/1300-1399/1344.Angle Between Hands of a Clock/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_1_1673.png" style="height: 225px; width: 230px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_1_1673.png" style="height: 225px; width: 230px;"></p>
 
 <pre><strong>输入：</strong>hour = 12, minutes = 30
 <strong>输出：</strong>165
@@ -20,7 +20,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_2_1673.png" style="height: 225px; width: 230px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_2_1673.png" style="height: 225px; width: 230px;"></p>
 
 <pre><strong>输入：</strong>hour = 3, minutes = 30
 <strong>输出；</strong>75
@@ -28,7 +28,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_3_1673.png" style="height: 231px; width: 230px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_3_1673.png" style="height: 231px; width: 230px;"></strong></p>
 
 <pre><strong>输入：</strong>hour = 3, minutes = 15
 <strong>输出：</strong>7.5
diff --git a/solution/1300-1399/1344.Angle Between Hands of a Clock/README_EN.md b/solution/1300-1399/1344.Angle Between Hands of a Clock/README_EN.md
index acd0f46cbfa58..8a8932b6d8fb0 100644
--- a/solution/1300-1399/1344.Angle Between Hands of a Clock/README_EN.md	
+++ b/solution/1300-1399/1344.Angle Between Hands of a Clock/README_EN.md	
@@ -10,21 +10,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_1_1673.png" style="width: 300px; height: 296px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_1_1673.png" style="width: 300px; height: 296px;" />
 <pre>
 <strong>Input:</strong> hour = 12, minutes = 30
 <strong>Output:</strong> 165
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_2_1673.png" style="width: 300px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_2_1673.png" style="width: 300px; height: 301px;" />
 <pre>
 <strong>Input:</strong> hour = 3, minutes = 30
 <strong>Output:</strong> 75
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_3_1673.png" style="width: 300px; height: 301px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1344.Angle%20Between%20Hands%20of%20a%20Clock/images/sample_3_1673.png" style="width: 300px; height: 301px;" />
 <pre>
 <strong>Input:</strong> hour = 3, minutes = 15
 <strong>Output:</strong> 7.5
diff --git a/solution/1300-1399/1349.Maximum Students Taking Exam/README.md b/solution/1300-1399/1349.Maximum Students Taking Exam/README.md
index 82720d2b28383..5cbf100640592 100644
--- a/solution/1300-1399/1349.Maximum Students Taking Exam/README.md	
+++ b/solution/1300-1399/1349.Maximum Students Taking Exam/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1349.Maximum%20Students%20Taking%20Exam/images/image.png" style="height: 197px; width: 339px;"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1349.Maximum%20Students%20Taking%20Exam/images/image.png" style="height: 197px; width: 339px;"></p>
 
 <pre><strong>输入：</strong>seats = [[&quot;#&quot;,&quot;.&quot;,&quot;#&quot;,&quot;#&quot;,&quot;.&quot;,&quot;#&quot;],
 &nbsp;             [&quot;.&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;.&quot;],
diff --git a/solution/1300-1399/1349.Maximum Students Taking Exam/README_EN.md b/solution/1300-1399/1349.Maximum Students Taking Exam/README_EN.md
index 8b11ab03f9942..44d69bc8e0f16 100644
--- a/solution/1300-1399/1349.Maximum Students Taking Exam/README_EN.md	
+++ b/solution/1300-1399/1349.Maximum Students Taking Exam/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img height="200" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1349.Maximum%20Students%20Taking%20Exam/images/image.png" width="339" />
+<img height="200" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1349.Maximum%20Students%20Taking%20Exam/images/image.png" width="339" />
 <pre>
 <strong>Input:</strong> seats = [[&quot;#&quot;,&quot;.&quot;,&quot;#&quot;,&quot;#&quot;,&quot;.&quot;,&quot;#&quot;],
 &nbsp;               [&quot;.&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;#&quot;,&quot;.&quot;],
diff --git a/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README.md b/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README.md
index 94f6eba8d17d8..08b4c7d29a739 100644
--- a/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README.md	
+++ b/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1353.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended/images/e1.png" style="height: 267px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1353.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended/images/e1.png" style="height: 267px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>events = [[1,2],[2,3],[3,4]]
diff --git a/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README_EN.md b/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README_EN.md
index f895c9b464242..8a0ec1a87a39c 100644
--- a/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README_EN.md	
+++ b/solution/1300-1399/1353.Maximum Number of Events That Can Be Attended/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1353.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended/images/e1.png" style="width: 400px; height: 267px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1353.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended/images/e1.png" style="width: 400px; height: 267px;" />
 <pre>
 <strong>Input:</strong> events = [[1,2],[2,3],[3,4]]
 <strong>Output:</strong> 3
diff --git a/solution/1300-1399/1361.Validate Binary Tree Nodes/README.md b/solution/1300-1399/1361.Validate Binary Tree Nodes/README.md
index b6cdbbeb0a2bb..6ba755bb1f939 100644
--- a/solution/1300-1399/1361.Validate Binary Tree Nodes/README.md	
+++ b/solution/1300-1399/1361.Validate Binary Tree Nodes/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex1.png" style="height: 287px; width: 195px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex1.png" style="height: 287px; width: 195px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, leftChild = [1,-1,3,-1], rightChild = [2,-1,-1,-1]
 <strong>输出：</strong>true
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex2.png" style="height: 272px; width: 183px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex2.png" style="height: 272px; width: 183px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, leftChild = [1,-1,3,-1], rightChild = [2,3,-1,-1]
 <strong>输出：</strong>false
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex3.png" style="height: 174px; width: 82px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex3.png" style="height: 174px; width: 82px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 2, leftChild = [1,0], rightChild = [-1,-1]
 <strong>输出：</strong>false
@@ -42,7 +42,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex4.png" style="height: 191px; width: 470px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex4.png" style="height: 191px; width: 470px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 6, leftChild = [1,-1,-1,4,-1,-1], rightChild = [2,-1,-1,5,-1,-1]
 <strong>输出：</strong>false
diff --git a/solution/1300-1399/1361.Validate Binary Tree Nodes/README_EN.md b/solution/1300-1399/1361.Validate Binary Tree Nodes/README_EN.md
index 5061125e34667..6be8db3a4dc08 100644
--- a/solution/1300-1399/1361.Validate Binary Tree Nodes/README_EN.md	
+++ b/solution/1300-1399/1361.Validate Binary Tree Nodes/README_EN.md	
@@ -12,21 +12,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex1.png" style="width: 195px; height: 287px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex1.png" style="width: 195px; height: 287px;" />
 <pre>
 <strong>Input:</strong> n = 4, leftChild = [1,-1,3,-1], rightChild = [2,-1,-1,-1]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex2.png" style="width: 183px; height: 272px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex2.png" style="width: 183px; height: 272px;" />
 <pre>
 <strong>Input:</strong> n = 4, leftChild = [1,-1,3,-1], rightChild = [2,3,-1,-1]
 <strong>Output:</strong> false
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex3.png" style="width: 82px; height: 174px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1361.Validate%20Binary%20Tree%20Nodes/images/1503_ex3.png" style="width: 82px; height: 174px;" />
 <pre>
 <strong>Input:</strong> n = 2, leftChild = [1,0], rightChild = [-1,-1]
 <strong>Output:</strong> false
diff --git a/solution/1300-1399/1367.Linked List in Binary Tree/README.md b/solution/1300-1399/1367.Linked List in Binary Tree/README.md
index 3dbff790a09b5..8175b1ea5d12d 100644
--- a/solution/1300-1399/1367.Linked List in Binary Tree/README.md	
+++ b/solution/1300-1399/1367.Linked List in Binary Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_1_1720.png" style="height: 280px; width: 220px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_1_1720.png" style="height: 280px; width: 220px;"></strong></p>
 
 <pre><strong>输入：</strong>head = [4,2,8], root = [1,4,4,null,2,2,null,1,null,6,8,null,null,null,null,1,3]
 <strong>输出：</strong>true
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_2_1720.png" style="height: 280px; width: 220px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_2_1720.png" style="height: 280px; width: 220px;"></strong></p>
 
 <pre><strong>输入：</strong>head = [1,4,2,6], root = [1,4,4,null,2,2,null,1,null,6,8,null,null,null,null,1,3]
 <strong>输出：</strong>true
diff --git a/solution/1300-1399/1367.Linked List in Binary Tree/README_EN.md b/solution/1300-1399/1367.Linked List in Binary Tree/README_EN.md
index 8f200b1cab706..d7743d4bb1632 100644
--- a/solution/1300-1399/1367.Linked List in Binary Tree/README_EN.md	
+++ b/solution/1300-1399/1367.Linked List in Binary Tree/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_1_1720.png" style="width: 220px; height: 280px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_1_1720.png" style="width: 220px; height: 280px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> head = [4,2,8], root = [1,4,4,null,2,2,null,1,null,6,8,null,null,null,null,1,3]
@@ -23,7 +23,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_2_1720.png" style="width: 220px; height: 280px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1367.Linked%20List%20in%20Binary%20Tree/images/sample_2_1720.png" style="width: 220px; height: 280px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> head = [1,4,2,6], root = [1,4,4,null,2,2,null,1,null,6,8,null,null,null,null,1,3]
diff --git a/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README.md b/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README.md
index 13ca79aa48ea7..969cf93f3536c 100644
--- a/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README.md	
+++ b/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid1.png" style="height: 528px; width: 542px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid1.png" style="height: 528px; width: 542px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,1,1,1],[2,2,2,2],[1,1,1,1],[2,2,2,2]]
 <strong>输出：</strong>3
@@ -38,7 +38,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid2.png" style="height: 408px; width: 419px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid2.png" style="height: 408px; width: 419px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,1,3],[3,2,2],[1,1,4]]
 <strong>输出：</strong>0
@@ -47,7 +47,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid3.png" style="height: 302px; width: 314px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid3.png" style="height: 302px; width: 314px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,2],[4,3]]
 <strong>输出：</strong>1
diff --git a/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README_EN.md b/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README_EN.md
index 295d1e396ec8e..d774c5e751241 100644
--- a/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README_EN.md	
+++ b/solution/1300-1399/1368.Minimum Cost to Make at Least One Valid Path in a Grid/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid1.png" style="width: 400px; height: 390px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid1.png" style="width: 400px; height: 390px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,1],[2,2,2,2],[1,1,1,1],[2,2,2,2]]
 <strong>Output:</strong> 3
@@ -33,7 +33,7 @@ The total cost = 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid2.png" style="width: 350px; height: 341px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid2.png" style="width: 350px; height: 341px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,3],[3,2,2],[1,1,4]]
 <strong>Output:</strong> 0
@@ -41,7 +41,7 @@ The total cost = 3.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid3.png" style="width: 200px; height: 192px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1368.Minimum%20Cost%20to%20Make%20at%20Least%20One%20Valid%20Path%20in%20a%20Grid/images/grid3.png" style="width: 200px; height: 192px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2],[4,3]]
 <strong>Output:</strong> 1
diff --git a/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README.md b/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README.md
index f1788142a1609..4f33aad50b6f8 100644
--- a/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README.md	
+++ b/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_1_1702.png" style="height: 283px; width: 151px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_1_1702.png" style="height: 283px; width: 151px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,null,1,1,1,null,null,1,1,null,1,null,null,null,1,null,1]
 <strong>输出：</strong>3
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_2_1702.png" style="height: 253px; width: 120px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_2_1702.png" style="height: 253px; width: 120px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [1,1,1,null,1,null,null,1,1,null,1]
 <strong>输出：</strong>4
diff --git a/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README_EN.md b/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README_EN.md
index cf4a279a8d8fd..63a54fd78371f 100644
--- a/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README_EN.md	
+++ b/solution/1300-1399/1372.Longest ZigZag Path in a Binary Tree/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_1_1702.png" style="width: 221px; height: 383px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_1_1702.png" style="width: 221px; height: 383px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,1,1,1,null,null,1,1,null,1,null,null,null,1,null,1]
 <strong>Output:</strong> 3
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_2_1702.png" style="width: 157px; height: 329px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1372.Longest%20ZigZag%20Path%20in%20a%20Binary%20Tree/images/sample_2_1702.png" style="width: 157px; height: 329px;" />
 <pre>
 <strong>Input:</strong> root = [1,1,1,null,1,null,null,1,1,null,1]
 <strong>Output:</strong> 4
diff --git a/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README.md b/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README.md
index 679e5f0e9cceb..d0f2bde8bef88 100644
--- a/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README.md	
+++ b/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_1_1709.png" style="height: 250px; width: 320px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_1_1709.png" style="height: 250px; width: 320px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,4,3,2,4,2,5,null,null,null,null,null,null,4,6]
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_2_1709.png" style="height: 180px; width: 134px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_2_1709.png" style="height: 180px; width: 134px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [4,3,null,1,2]
diff --git a/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README_EN.md b/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README_EN.md
index 5855e1813656c..c98e50baf3000 100644
--- a/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README_EN.md	
+++ b/solution/1300-1399/1373.Maximum Sum BST in Binary Tree/README_EN.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_1_1709.png" style="width: 320px; height: 250px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_1_1709.png" style="width: 320px; height: 250px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,4,3,2,4,2,5,null,null,null,null,null,null,4,6]
@@ -27,7 +27,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_2_1709.png" style="width: 134px; height: 180px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1373.Maximum%20Sum%20BST%20in%20Binary%20Tree/images/sample_2_1709.png" style="width: 134px; height: 180px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [4,3,null,1,2]
diff --git a/solution/1300-1399/1376.Time Needed to Inform All Employees/README.md b/solution/1300-1399/1376.Time Needed to Inform All Employees/README.md
index bc4990aea3d16..baac5091bcc7a 100644
--- a/solution/1300-1399/1376.Time Needed to Inform All Employees/README.md	
+++ b/solution/1300-1399/1376.Time Needed to Inform All Employees/README.md	
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1376.Time%20Needed%20to%20Inform%20All%20Employees/images/graph.png" style="height: 174px; width: 404px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1376.Time%20Needed%20to%20Inform%20All%20Employees/images/graph.png" style="height: 174px; width: 404px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 6, headID = 2, manager = [2,2,-1,2,2,2], informTime = [0,0,1,0,0,0]
diff --git a/solution/1300-1399/1376.Time Needed to Inform All Employees/README_EN.md b/solution/1300-1399/1376.Time Needed to Inform All Employees/README_EN.md
index 32e6f78a9282a..86aa339d0171a 100644
--- a/solution/1300-1399/1376.Time Needed to Inform All Employees/README_EN.md	
+++ b/solution/1300-1399/1376.Time Needed to Inform All Employees/README_EN.md	
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1376.Time%20Needed%20to%20Inform%20All%20Employees/images/graph.png" style="width: 404px; height: 174px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1376.Time%20Needed%20to%20Inform%20All%20Employees/images/graph.png" style="width: 404px; height: 174px;" />
 <pre>
 <strong>Input:</strong> n = 6, headID = 2, manager = [2,2,-1,2,2,2], informTime = [0,0,1,0,0,0]
 <strong>Output:</strong> 1
diff --git a/solution/1300-1399/1377.Frog Position After T Seconds/README.md b/solution/1300-1399/1377.Frog Position After T Seconds/README.md
index ee5d3a39958e8..b71c832ea3f0e 100644
--- a/solution/1300-1399/1377.Frog Position After T Seconds/README.md	
+++ b/solution/1300-1399/1377.Frog Position After T Seconds/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog1.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, edges = [[1,2],[1,3],[1,7],[2,4],[2,6],[3,5]], t = 2, target = 4
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog2.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog2.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, edges = [[1,2],[1,3],[1,7],[2,4],[2,6],[3,5]], t = 1, target = 7
diff --git a/solution/1300-1399/1377.Frog Position After T Seconds/README_EN.md b/solution/1300-1399/1377.Frog Position After T Seconds/README_EN.md
index 2451ba35e75a6..b9e725107efa0 100644
--- a/solution/1300-1399/1377.Frog Position After T Seconds/README_EN.md	
+++ b/solution/1300-1399/1377.Frog Position After T Seconds/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog1.jpg" style="width: 338px; height: 304px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog1.jpg" style="width: 338px; height: 304px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,2],[1,3],[1,7],[2,4],[2,6],[3,5]], t = 2, target = 4
 <strong>Output:</strong> 0.16666666666666666 
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog2.jpg" style="width: 304px; height: 304px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1377.Frog%20Position%20After%20T%20Seconds/images/frog2.jpg" style="width: 304px; height: 304px;" /></strong>
 
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,2],[1,3],[1,7],[2,4],[2,6],[3,5]], t = 1, target = 7
diff --git a/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README.md b/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README.md
index 35581c430f470..dc13358808a63 100644
--- a/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README.md	
+++ b/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e1.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e1.png" /></p>
 
 <pre>
 <strong>输入:</strong> tree = [7,4,3,null,null,6,19], target = 3
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e2.png" /></p>
 
 <pre>
 <strong>输入:</strong> tree = [7], target =  7
@@ -44,7 +44,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e3.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e3.png" /></p>
 
 <pre>
 <strong>输入:</strong> tree = [8,null,6,null,5,null,4,null,3,null,2,null,1], target = 4
diff --git a/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README_EN.md b/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README_EN.md
index f8bd0c3505ec9..0b569717bdd16 100644
--- a/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README_EN.md	
+++ b/solution/1300-1399/1379.Find a Corresponding Node of a Binary Tree in a Clone of That Tree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e1.png" style="width: 544px; height: 426px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e1.png" style="width: 544px; height: 426px;" />
 <pre>
 <strong>Input:</strong> tree = [7,4,3,null,null,6,19], target = 3
 <strong>Output:</strong> 3
@@ -22,14 +22,14 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e2.png" style="width: 221px; height: 159px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e2.png" style="width: 221px; height: 159px;" />
 <pre>
 <strong>Input:</strong> tree = [7], target =  7
 <strong>Output:</strong> 7
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e3.png" style="width: 459px; height: 486px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1379.Find%20a%20Corresponding%20Node%20of%20a%20Binary%20Tree%20in%20a%20Clone%20of%20That%20Tree/images/e3.png" style="width: 459px; height: 486px;" />
 <pre>
 <strong>Input:</strong> tree = [8,null,6,null,5,null,4,null,3,null,2,null,1], target = 4
 <strong>Output:</strong> 4
diff --git a/solution/1300-1399/1382.Balance a Binary Search Tree/README.md b/solution/1300-1399/1382.Balance a Binary Search Tree/README.md
index ebe7fbfed8434..d88333f6b7113 100644
--- a/solution/1300-1399/1382.Balance a Binary Search Tree/README.md	
+++ b/solution/1300-1399/1382.Balance a Binary Search Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balance1-tree.jpg" style="height: 319px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balance1-tree.jpg" style="height: 319px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,null,3,null,4,null,null]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balanced2-tree.jpg" style="height: 145px; width: 224px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balanced2-tree.jpg" style="height: 145px; width: 224px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [2,1,3]
diff --git a/solution/1300-1399/1382.Balance a Binary Search Tree/README_EN.md b/solution/1300-1399/1382.Balance a Binary Search Tree/README_EN.md
index 626fbdf1e9a5f..2aa2c1e2985f9 100644
--- a/solution/1300-1399/1382.Balance a Binary Search Tree/README_EN.md	
+++ b/solution/1300-1399/1382.Balance a Binary Search Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balance1-tree.jpg" style="width: 500px; height: 319px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balance1-tree.jpg" style="width: 500px; height: 319px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,null,3,null,4,null,null]
 <strong>Output:</strong> [2,1,3,null,null,null,4]
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balanced2-tree.jpg" style="width: 224px; height: 145px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1382.Balance%20a%20Binary%20Search%20Tree/images/balanced2-tree.jpg" style="width: 224px; height: 145px;" />
 <pre>
 <strong>Input:</strong> root = [2,1,3]
 <strong>Output:</strong> [2,1,3]
diff --git a/solution/1300-1399/1386.Cinema Seat Allocation/README.md b/solution/1300-1399/1386.Cinema Seat Allocation/README.md
index b445e266c069b..07a0bfde89ffd 100644
--- a/solution/1300-1399/1386.Cinema Seat Allocation/README.md	
+++ b/solution/1300-1399/1386.Cinema Seat Allocation/README.md	
@@ -6,7 +6,7 @@
 
 <!-- 这里写题目描述 -->
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_1.png" style="height: 149px; width: 400px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_1.png" style="height: 149px; width: 400px;"></p>
 
 <p>如上图所示，电影院的观影厅中有 <code>n</code>&nbsp;行座位，行编号从 1&nbsp;到 <code>n</code>&nbsp;，且每一行内总共有 10 个座位，列编号从 1 到 10 。</p>
 
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_3.png" style="height: 96px; width: 400px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_3.png" style="height: 96px; width: 400px;"></p>
 
 <pre><strong>输入：</strong>n = 3, reservedSeats = [[1,2],[1,3],[1,8],[2,6],[3,1],[3,10]]
 <strong>输出：</strong>4
diff --git a/solution/1300-1399/1386.Cinema Seat Allocation/README_EN.md b/solution/1300-1399/1386.Cinema Seat Allocation/README_EN.md
index d8e51a87ddc21..86e3fa4a8e632 100644
--- a/solution/1300-1399/1386.Cinema Seat Allocation/README_EN.md	
+++ b/solution/1300-1399/1386.Cinema Seat Allocation/README_EN.md	
@@ -4,7 +4,7 @@
 
 ## Description
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_1.png" style="width: 400px; height: 149px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_1.png" style="width: 400px; height: 149px;" /></p>
 
 <p>A cinema&nbsp;has <code>n</code>&nbsp;rows of seats, numbered from 1 to <code>n</code>&nbsp;and there are ten&nbsp;seats in each row, labelled from 1&nbsp;to 10&nbsp;as shown in the figure above.</p>
 
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_3.png" style="width: 400px; height: 96px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1386.Cinema%20Seat%20Allocation/images/cinema_seats_3.png" style="width: 400px; height: 96px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 3, reservedSeats = [[1,2],[1,3],[1,8],[2,6],[3,1],[3,10]]
diff --git a/solution/1300-1399/1388.Pizza With 3n Slices/README.md b/solution/1300-1399/1388.Pizza With 3n Slices/README.md
index 0b5753d036391..607e85d19466e 100644
--- a/solution/1300-1399/1388.Pizza With 3n Slices/README.md	
+++ b/solution/1300-1399/1388.Pizza With 3n Slices/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_3_1723.png" style="height: 240px; width: 475px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_3_1723.png" style="height: 240px; width: 475px;" /></p>
 
 <pre>
 <strong>输入：</strong>slices = [1,2,3,4,5,6]
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_4_1723.png" style="height: 250px; width: 475px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_4_1723.png" style="height: 250px; width: 475px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>slices = [8,9,8,6,1,1]
diff --git a/solution/1300-1399/1388.Pizza With 3n Slices/README_EN.md b/solution/1300-1399/1388.Pizza With 3n Slices/README_EN.md
index c93f9fa6703c6..7c1eb6a5fe83f 100644
--- a/solution/1300-1399/1388.Pizza With 3n Slices/README_EN.md	
+++ b/solution/1300-1399/1388.Pizza With 3n Slices/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_3_1723.png" style="width: 500px; height: 266px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_3_1723.png" style="width: 500px; height: 266px;" />
 <pre>
 <strong>Input:</strong> slices = [1,2,3,4,5,6]
 <strong>Output:</strong> 10
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_4_1723.png" style="width: 500px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1388.Pizza%20With%203n%20Slices/images/sample_4_1723.png" style="width: 500px; height: 299px;" />
 <pre>
 <strong>Input:</strong> slices = [8,9,8,6,1,1]
 <strong>Output:</strong> 16
diff --git a/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README.md b/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README.md
index 3f3c9a0d9288a..72fac960b5899 100644
--- a/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README.md	
+++ b/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README.md	
@@ -17,7 +17,7 @@
 	<li><strong>6</strong> 表示连接右单元格和上单元格的街道。</li>
 </ul>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/main.png" style="height: 708px; width: 450px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/main.png" style="height: 708px; width: 450px;"></p>
 
 <p>你最开始从左上角的单元格 <code>(0,0)</code> 开始出发，网格中的「有效路径」是指从左上方的单元格 <code>(0,0)</code> 开始、一直到右下方的 <code>(m-1,n-1)</code> 结束的路径。<strong>该路径必须只沿着街道走</strong>。</p>
 
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e1.png" style="height: 311px; width: 455px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e1.png" style="height: 311px; width: 455px;"></p>
 
 <pre><strong>输入：</strong>grid = [[2,4,3],[6,5,2]]
 <strong>输出：</strong>true
@@ -38,7 +38,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e2.png" style="height: 293px; width: 455px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e2.png" style="height: 293px; width: 455px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,2,1],[1,2,1]]
 <strong>输出：</strong>false
diff --git a/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README_EN.md b/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README_EN.md
index 54461cb30f42a..ff48789379d31 100644
--- a/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README_EN.md	
+++ b/solution/1300-1399/1391.Check if There is a Valid Path in a Grid/README_EN.md	
@@ -14,7 +14,7 @@
 	<li><code>5</code> which means a street connecting the left cell and the upper cell.</li>
 	<li><code>6</code> which means a street connecting the right cell and the upper cell.</li>
 </ul>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/main.png" style="width: 450px; height: 708px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/main.png" style="width: 450px; height: 708px;" />
 <p>You will initially start at the street of the upper-left cell <code>(0, 0)</code>. A valid path in the grid is a path that starts from the upper left cell <code>(0, 0)</code> and ends at the bottom-right cell <code>(m - 1, n - 1)</code>. <strong>The path should only follow the streets</strong>.</p>
 
 <p><strong>Notice</strong> that you are <strong>not allowed</strong> to change any street.</p>
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e1.png" style="width: 455px; height: 311px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e1.png" style="width: 455px; height: 311px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,4,3],[6,5,2]]
 <strong>Output:</strong> true
@@ -31,7 +31,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e2.png" style="width: 455px; height: 293px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1300-1399/1391.Check%20if%20There%20is%20a%20Valid%20Path%20in%20a%20Grid/images/e2.png" style="width: 455px; height: 293px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2,1],[1,2,1]]
 <strong>Output:</strong> false
diff --git a/solution/1400-1499/1401.Circle and Rectangle Overlapping/README.md b/solution/1400-1499/1401.Circle and Rectangle Overlapping/README.md
index ae58c25261f17..06d5af23c7fa9 100644
--- a/solution/1400-1499/1401.Circle and Rectangle Overlapping/README.md	
+++ b/solution/1400-1499/1401.Circle and Rectangle Overlapping/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_4_1728.png" style="height: 167px; width: 258px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_4_1728.png" style="height: 167px; width: 258px;"></p>
 
 <pre><strong>输入：</strong>radius = 1, x_center = 0, y_center = 0, x1 = 1, y1 = -1, x2 = 3, y2 = 1
 <strong>输出：</strong>true
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_2_1728.png" style="height: 135px; width: 150px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_2_1728.png" style="height: 135px; width: 150px;"></strong></p>
 
 <pre><strong>输入：</strong>radius = 1, x_center = 0, y_center = 0, x1 = -1, y1 = 0, x2 = 0, y2 = 1
 <strong>输出：</strong>true
@@ -33,7 +33,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_6_1728.png" style="height: 165px; width: 175px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_6_1728.png" style="height: 165px; width: 175px;"></strong></p>
 
 <pre><strong>输入：</strong>radius = 1, x_center = 1, y_center = 1, x1 = -3, y1 = -3, x2 = 3, y2 = 3
 <strong>输出：</strong>true
diff --git a/solution/1400-1499/1401.Circle and Rectangle Overlapping/README_EN.md b/solution/1400-1499/1401.Circle and Rectangle Overlapping/README_EN.md
index 4965b3f743b82..af0a33eab9900 100644
--- a/solution/1400-1499/1401.Circle and Rectangle Overlapping/README_EN.md	
+++ b/solution/1400-1499/1401.Circle and Rectangle Overlapping/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_4_1728.png" style="width: 258px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_4_1728.png" style="width: 258px; height: 167px;" />
 <pre>
 <strong>Input:</strong> radius = 1, xCenter = 0, yCenter = 0, x1 = 1, y1 = -1, x2 = 3, y2 = 1
 <strong>Output:</strong> true
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_2_1728.png" style="width: 150px; height: 135px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1401.Circle%20and%20Rectangle%20Overlapping/images/sample_2_1728.png" style="width: 150px; height: 135px;" />
 <pre>
 <strong>Input:</strong> radius = 1, xCenter = 0, yCenter = 0, x1 = -1, y1 = 0, x2 = 0, y2 = 1
 <strong>Output:</strong> true
diff --git "a/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README.md" "b/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README.md"
index 7efe90f55a777..f67bce2e1e6c8 100644
--- "a/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README.md"	
+++ "b/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README.md"	
@@ -19,7 +19,7 @@
 <pre><strong>输入：</strong>n = 1
 <strong>输出：</strong>12
 <strong>解释：</strong>总共有 12 种可行的方法：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1411.Number%20of%20Ways%20to%20Paint%20N%20%C3%97%203%20Grid/images/e1.png" style="height: 289px; width: 450px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1411.Number%20of%20Ways%20to%20Paint%20N%20%C3%97%203%20Grid/images/e1.png" style="height: 289px; width: 450px;">
 </pre>
 
 <p><strong>示例 2：</strong></p>
diff --git "a/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README_EN.md" "b/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README_EN.md"
index 9d4d234f80d89..2a2035437baf3 100644
--- "a/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README_EN.md"	
+++ "b/solution/1400-1499/1411.Number of Ways to Paint N \303\227 3 Grid/README_EN.md"	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1411.Number%20of%20Ways%20to%20Paint%20N%20%C3%97%203%20Grid/images/e1.png" style="width: 400px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1411.Number%20of%20Ways%20to%20Paint%20N%20%C3%97%203%20Grid/images/e1.png" style="width: 400px; height: 257px;" />
 <pre>
 <strong>Input:</strong> n = 1
 <strong>Output:</strong> 12
diff --git a/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README.md b/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README.md
index 4c1c7b4e6b380..4a1ba116d24b2 100644
--- a/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README.md	
+++ b/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README.md	
@@ -8,7 +8,7 @@
 
 <p>给你三个整数 <code>n</code>、<code>m</code> 和 <code>k</code> 。下图描述的算法用于找出正整数数组中最大的元素。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1420.Build%20Array%20Where%20You%20Can%20Find%20The%20Maximum%20Exactly%20K%20Comparisons/images/e.png" style="height: 372px; width: 424px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1420.Build%20Array%20Where%20You%20Can%20Find%20The%20Maximum%20Exactly%20K%20Comparisons/images/e.png" style="height: 372px; width: 424px;"></p>
 
 <p>请你生成一个具有下述属性的数组 <code>arr</code> ：</p>
 
diff --git a/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README_EN.md b/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README_EN.md
index 9ce80bcc4622d..9ce7d770ddea6 100644
--- a/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README_EN.md	
+++ b/solution/1400-1499/1420.Build Array Where You Can Find The Maximum Exactly K Comparisons/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>You are given three integers <code>n</code>, <code>m</code> and <code>k</code>. Consider the following algorithm to find the maximum element of an array of positive integers:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1420.Build%20Array%20Where%20You%20Can%20Find%20The%20Maximum%20Exactly%20K%20Comparisons/images/e.png" style="width: 424px; height: 372px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1420.Build%20Array%20Where%20You%20Can%20Find%20The%20Maximum%20Exactly%20K%20Comparisons/images/e.png" style="width: 424px; height: 372px;" />
 <p>You should build the array arr which has the following properties:</p>
 
 <ul>
diff --git a/solution/1400-1499/1424.Diagonal Traverse II/README.md b/solution/1400-1499/1424.Diagonal Traverse II/README.md
index e1937f5049e90..4256ea699738c 100644
--- a/solution/1400-1499/1424.Diagonal Traverse II/README.md	
+++ b/solution/1400-1499/1424.Diagonal Traverse II/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_1_1784.png" style="height: 143px; width: 158px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_1_1784.png" style="height: 143px; width: 158px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>输出：</strong>[1,4,2,7,5,3,8,6,9]
@@ -20,7 +20,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_2_1784.png" style="height: 177px; width: 230px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_2_1784.png" style="height: 177px; width: 230px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [[1,2,3,4,5],[6,7],[8],[9,10,11],[12,13,14,15,16]]
 <strong>输出：</strong>[1,6,2,8,7,3,9,4,12,10,5,13,11,14,15,16]
diff --git a/solution/1400-1499/1424.Diagonal Traverse II/README_EN.md b/solution/1400-1499/1424.Diagonal Traverse II/README_EN.md
index e5a8671be3e81..4a3e446ab7973 100644
--- a/solution/1400-1499/1424.Diagonal Traverse II/README_EN.md	
+++ b/solution/1400-1499/1424.Diagonal Traverse II/README_EN.md	
@@ -8,14 +8,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_1_1784.png" style="width: 158px; height: 143px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_1_1784.png" style="width: 158px; height: 143px;" />
 <pre>
 <strong>Input:</strong> nums = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> [1,4,2,7,5,3,8,6,9]
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_2_1784.png" style="width: 230px; height: 177px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1424.Diagonal%20Traverse%20II/images/sample_2_1784.png" style="width: 230px; height: 177px;" />
 <pre>
 <strong>Input:</strong> nums = [[1,2,3,4,5],[6,7],[8],[9,10,11],[12,13,14,15,16]]
 <strong>Output:</strong> [1,6,2,8,7,3,9,4,12,10,5,13,11,14,15,16]
diff --git a/solution/1400-1499/1428.Leftmost Column with at Least a One/README.md b/solution/1400-1499/1428.Leftmost Column with at Least a One/README.md
index b2339e3762a03..5966f8db060bf 100644
--- a/solution/1400-1499/1428.Leftmost Column with at Least a One/README.md	
+++ b/solution/1400-1499/1428.Leftmost Column with at Least a One/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-5.jpg" style="height:81px; width:81px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-5.jpg" style="height:81px; width:81px" /></strong></p>
 
 <pre>
 <strong>输入:</strong> mat = [[0,0],[1,1]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-4.jpg" style="height:81px; width:81px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-4.jpg" style="height:81px; width:81px" /></strong></p>
 
 <pre>
 <strong>输入:</strong> mat = [[0,0],[0,1]]
@@ -45,7 +45,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-3.jpg" style="height:81px; width:81px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-3.jpg" style="height:81px; width:81px" /></strong></p>
 
 <pre>
 <strong>输入:</strong> mat = [[0,0],[0,0]]
@@ -53,7 +53,7 @@
 
 <p><strong>示例 4:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-6.jpg" style="height:121px; width:161px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-6.jpg" style="height:121px; width:161px" /></strong></p>
 
 <pre>
 <strong>输入:</strong> mat = [[0,0,0,1],[0,0,1,1],[0,1,1,1]]
diff --git a/solution/1400-1499/1428.Leftmost Column with at Least a One/README_EN.md b/solution/1400-1499/1428.Leftmost Column with at Least a One/README_EN.md
index ee893c964f33b..ab1c28673b2d1 100644
--- a/solution/1400-1499/1428.Leftmost Column with at Least a One/README_EN.md	
+++ b/solution/1400-1499/1428.Leftmost Column with at Least a One/README_EN.md	
@@ -21,21 +21,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-5.jpg" style="width: 81px; height: 81px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-5.jpg" style="width: 81px; height: 81px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0],[1,1]]
 <strong>Output:</strong> 0
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-4.jpg" style="width: 81px; height: 81px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-4.jpg" style="width: 81px; height: 81px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0],[0,1]]
 <strong>Output:</strong> 1
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-3.jpg" style="width: 81px; height: 81px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1428.Leftmost%20Column%20with%20at%20Least%20a%20One/images/untitled-diagram-3.jpg" style="width: 81px; height: 81px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0],[0,0]]
 <strong>Output:</strong> -1
diff --git a/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README.md b/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README.md
index 4c6f45177897d..b2820293ada3f 100644
--- a/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README.md	
+++ b/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_1.png" style="height:250px; width:333px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_1.png" style="height:250px; width:333px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,1,0,1]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_2.png" style="height:250px; width:333px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_2.png" style="height:250px; width:333px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,0,1]
@@ -38,7 +38,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_3.png" style="height:250px; width:333px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_3.png" style="height:250px; width:333px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,1,1]
diff --git a/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README_EN.md b/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README_EN.md
index 8bee25a9f02e1..32f339227fa84 100644
--- a/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README_EN.md	
+++ b/solution/1400-1499/1430.Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_1.png" style="width: 333px; height: 250px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_1.png" style="width: 333px; height: 250px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,1,0,1]
@@ -25,7 +25,7 @@ Other valid sequences are:
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_2.png" style="width: 333px; height: 250px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_2.png" style="width: 333px; height: 250px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,0,1]
@@ -35,7 +35,7 @@ Other valid sequences are:
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_3.png" style="width: 333px; height: 250px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1430.Check%20If%20a%20String%20Is%20a%20Valid%20Sequence%20from%20Root%20to%20Leaves%20Path%20in%20a%20Binary%20Tree/images/leetcode_testcase_3.png" style="width: 333px; height: 250px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [0,1,0,0,1,0,null,null,1,0,0], arr = [0,1,1]
diff --git a/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README.md b/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README.md
index 596b0ca9f3941..8e71c22f8017a 100644
--- a/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README.md	
+++ b/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_1_1791.png" style="width: 214px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_1_1791.png" style="width: 214px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [1,0,0,0,1,0,0,1], k = 2
 <strong>输出：</strong>true
@@ -20,7 +20,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_2_1791.png" style="height: 86px; width: 160px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_2_1791.png" style="height: 86px; width: 160px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [1,0,0,1,0,1], k = 2
 <strong>输出：</strong>false
diff --git a/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README_EN.md b/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README_EN.md
index 405397f9c5f49..5b40dbf19a616 100644
--- a/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README_EN.md	
+++ b/solution/1400-1499/1437.Check If All 1's Are at Least Length K Places Away/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_1_1791.png" style="width: 428px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_1_1791.png" style="width: 428px; height: 181px;" />
 <pre>
 <strong>Input:</strong> nums = [1,0,0,0,1,0,0,1], k = 2
 <strong>Output:</strong> true
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_2_1791.png" style="width: 320px; height: 173px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1437.Check%20If%20All%201%27s%20Are%20at%20Least%20Length%20K%20Places%20Away/images/sample_2_1791.png" style="width: 320px; height: 173px;" />
 <pre>
 <strong>Input:</strong> nums = [1,0,0,1,0,1], k = 2
 <strong>Output:</strong> false
diff --git a/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README.md b/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README.md
index 27888c41e2526..6ff7f2b7dc5db 100644
--- a/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README.md	
+++ b/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_1.png" style="height: 212px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_1.png" style="height: 212px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], hasApple = [false,false,true,false,true,true,false]
 <strong>输出：</strong>8 
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_2.png" style="height: 212px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_2.png" style="height: 212px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], hasApple = [false,false,true,false,false,true,false]
 <strong>输出：</strong>6
diff --git a/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README_EN.md b/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README_EN.md
index 8887992b42c71..e2eb8a7e62742 100644
--- a/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README_EN.md	
+++ b/solution/1400-1499/1443.Minimum Time to Collect All Apples in a Tree/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_1.png" style="width: 300px; height: 212px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_1.png" style="width: 300px; height: 212px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], hasApple = [false,false,true,false,true,true,false]
 <strong>Output:</strong> 8 
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_2.png" style="width: 300px; height: 212px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1443.Minimum%20Time%20to%20Collect%20All%20Apples%20in%20a%20Tree/images/min_time_collect_apple_2.png" style="width: 300px; height: 212px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], hasApple = [false,false,true,false,false,true,false]
 <strong>Output:</strong> 6
diff --git a/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README.md b/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README.md
index 84dfeb56c0302..5a2785f324a5d 100644
--- a/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README.md	
+++ b/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1444.Number%20of%20Ways%20of%20Cutting%20a%20Pizza/images/ways_to_cut_apple_1.png" style="height: 378px; width: 500px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1444.Number%20of%20Ways%20of%20Cutting%20a%20Pizza/images/ways_to_cut_apple_1.png" style="height: 378px; width: 500px;"></strong></p>
 
 <pre><strong>输入：</strong>pizza = [&quot;A..&quot;,&quot;AAA&quot;,&quot;...&quot;], k = 3
 <strong>输出：</strong>3 
diff --git a/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README_EN.md b/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README_EN.md
index bcb6c2a0bb251..bfec5f0946463 100644
--- a/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README_EN.md	
+++ b/solution/1400-1499/1444.Number of Ways of Cutting a Pizza/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1444.Number%20of%20Ways%20of%20Cutting%20a%20Pizza/images/ways_to_cut_apple_1.png" style="width: 500px; height: 378px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1444.Number%20of%20Ways%20of%20Cutting%20a%20Pizza/images/ways_to_cut_apple_1.png" style="width: 500px; height: 378px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README.md b/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README.md
index 350bb77e217b9..617d842a56c7c 100644
--- a/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README.md	
+++ b/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_1.png" style="height: 156px; width: 263px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_1.png" style="height: 156px; width: 263px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [3,1,4,3,null,1,5]
 <strong>输出：</strong>4
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_2.png" style="height: 161px; width: 157px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_2.png" style="height: 161px; width: 157px;"></strong></p>
 
 <pre><strong>输入：</strong>root = [3,3,null,4,2]
 <strong>输出：</strong>3
diff --git a/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README_EN.md b/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README_EN.md
index 285564b0d3d00..02d75a89c11da 100644
--- a/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README_EN.md	
+++ b/solution/1400-1499/1448.Count Good Nodes in Binary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_1.png" style="width: 263px; height: 156px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_1.png" style="width: 263px; height: 156px;" /></strong></p>
 
 <pre>
 
@@ -32,7 +32,7 @@ Node 3 -&gt; (3,1,3) is the maximum value in the path.</pre>
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_2.png" style="width: 157px; height: 161px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1448.Count%20Good%20Nodes%20in%20Binary%20Tree/images/test_sample_2.png" style="width: 157px; height: 161px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README.md b/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README.md
index 32a4c35a0fe04..ff62edd21cb37 100644
--- a/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README.md	
+++ b/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_1_1806.png" style="height: 159px; width: 186px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_1_1806.png" style="height: 159px; width: 186px;"></p>
 
 <pre><strong>输入：</strong>points = [[-2,0],[2,0],[0,2],[0,-2]], r = 2
 <strong>输出：</strong>4
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_2_1806.png" style="height: 183px; width: 224px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_2_1806.png" style="height: 183px; width: 224px;"></strong></p>
 
 <pre><strong>输入：</strong>points = [[-3,0],[3,0],[2,6],[5,4],[0,9],[7,8]], r = 5
 <strong>输出：</strong>5
diff --git a/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README_EN.md b/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README_EN.md
index 48d34fc2fe6d1..b7d4418e98b7e 100644
--- a/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README_EN.md	
+++ b/solution/1400-1499/1453.Maximum Number of Darts Inside of a Circular Dartboard/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_1_1806.png" style="width: 248px; height: 211px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_1_1806.png" style="width: 248px; height: 211px;" />
 <pre>
 <strong>Input:</strong> darts = [[-2,0],[2,0],[0,2],[0,-2]], r = 2
 <strong>Output:</strong> 4
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_2_1806.png" style="width: 306px; height: 244px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1453.Maximum%20Number%20of%20Darts%20Inside%20of%20a%20Circular%20Dartboard/images/sample_2_1806.png" style="width: 306px; height: 244px;" />
 <pre>
 <strong>Input:</strong> darts = [[-3,0],[3,0],[2,6],[5,4],[0,9],[7,8]], r = 5
 <strong>Output:</strong> 5
diff --git a/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README.md b/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README.md
index b2846c731f5a6..6ba49f86d1510 100644
--- a/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README.md	
+++ b/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_1.png" style="height: 201px; width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_1.png" style="height: 201px; width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [2,3,1,3,1,null,1]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_2.png" style="height: 314px; width: 300px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_2.png" style="height: 314px; width: 300px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [2,1,1,1,3,null,null,null,null,null,1]
diff --git a/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README_EN.md b/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README_EN.md
index 3044608fa93cb..019e4492d0161 100644
--- a/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README_EN.md	
+++ b/solution/1400-1499/1457.Pseudo-Palindromic Paths in a Binary Tree/README_EN.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_1.png" style="width: 300px; height: 201px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_1.png" style="width: 300px; height: 201px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [2,3,1,3,1,null,1]
@@ -21,7 +21,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_2.png" style="width: 300px; height: 314px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1457.Pseudo-Palindromic%20Paths%20in%20a%20Binary%20Tree/images/palindromic_paths_2.png" style="width: 300px; height: 314px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [2,1,1,1,3,null,null,null,null,null,1]
diff --git a/solution/1400-1499/1458.Max Dot Product of Two Subsequences/README.md b/solution/1400-1499/1458.Max Dot Product of Two Subsequences/README.md
index 09c24bc3c0ded..2f9d75ed3cbcf 100644
--- a/solution/1400-1499/1458.Max Dot Product of Two Subsequences/README.md	
+++ b/solution/1400-1499/1458.Max Dot Product of Two Subsequences/README.md	
@@ -54,7 +54,7 @@
 <pre>
 定义 <code><strong>a</strong>&nbsp;= [<em>a</em><sub>1</sub>,&nbsp;<em>a</em><sub>2</sub>,&hellip;,&nbsp;<em>a</em><sub><em>n</em></sub>]</code> 和<strong> <code>b</code></strong><code>&nbsp;= [<em>b</em><sub>1</sub>,&nbsp;<em>b</em><sub>2</sub>,&hellip;,&nbsp;<em>b</em><sub><em>n</em></sub>]</code> 的点积为：
 
-<img alt="\mathbf{a}\cdot \mathbf{b} = \sum_{i=1}^n a_ib_i = a_1b_1 + a_2b_2 + \cdots + a_nb_n " class="tex" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1458.Max%20Dot%20Product%20of%20Two%20Subsequences/images/c329bf86e747d74f55ed2e17c36fd83f.png" />
+<img alt="\mathbf{a}\cdot \mathbf{b} = \sum_{i=1}^n a_ib_i = a_1b_1 + a_2b_2 + \cdots + a_nb_n " class="tex" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1458.Max%20Dot%20Product%20of%20Two%20Subsequences/images/c329bf86e747d74f55ed2e17c36fd83f.png" />
 
 这里的 <strong>&Sigma;</strong> 指示总和符号。
 </pre>
diff --git a/solution/1400-1499/1459.Rectangles Area/README.md b/solution/1400-1499/1459.Rectangles Area/README.md
index 1b38fb478cb7c..f1f5d091a3442 100644
--- a/solution/1400-1499/1459.Rectangles Area/README.md	
+++ b/solution/1400-1499/1459.Rectangles Area/README.md	
@@ -52,7 +52,7 @@ Result 表:
 | 1        | 2           | 2           |
 +----------+-------------+-------------+
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1459.Rectangles%20Area/images/rect.png" style="width: 200px; height: 330px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1459.Rectangles%20Area/images/rect.png" style="width: 200px; height: 330px;" />
 
 p1 = 2 且 p2 = 3 时, 面积等于 |4-2| * |8-10| = 4
 p1 = 1 且 p2 = 2 时, 面积等于 ||2-4| * |7-8| = 2 
diff --git a/solution/1400-1499/1459.Rectangles Area/README_EN.md b/solution/1400-1499/1459.Rectangles Area/README_EN.md
index b53ae767f111c..d97c3aafdea03 100644
--- a/solution/1400-1499/1459.Rectangles Area/README_EN.md	
+++ b/solution/1400-1499/1459.Rectangles Area/README_EN.md	
@@ -34,7 +34,7 @@ Each point is represented as a 2D coordinate (x_value, y_value).</pre>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1459.Rectangles%20Area/images/rect.png" style="width: 303px; height: 500px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1459.Rectangles%20Area/images/rect.png" style="width: 303px; height: 500px;" />
 <pre>
 <strong>Input:</strong> 
 Points table:
diff --git a/solution/1400-1499/1462.Course Schedule IV/README.md b/solution/1400-1499/1462.Course Schedule IV/README.md
index b6b2ee82c74e6..7140bbe526d93 100644
--- a/solution/1400-1499/1462.Course Schedule IV/README.md	
+++ b/solution/1400-1499/1462.Course Schedule IV/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-1-graph.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-1-graph.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>numCourses = 2, prerequisites = [[1,0]], queries = [[0,1],[1,0]]
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-3-graph.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-3-graph.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>numCourses = 3, prerequisites = [[1,2],[1,0],[2,0]], queries = [[1,0],[1,2]]
diff --git a/solution/1400-1499/1462.Course Schedule IV/README_EN.md b/solution/1400-1499/1462.Course Schedule IV/README_EN.md
index 1fe80a2a9d04b..53c0904e8b9c6 100644
--- a/solution/1400-1499/1462.Course Schedule IV/README_EN.md	
+++ b/solution/1400-1499/1462.Course Schedule IV/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-1-graph.jpg" style="width: 222px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-1-graph.jpg" style="width: 222px; height: 62px;" />
 <pre>
 <strong>Input:</strong> numCourses = 2, prerequisites = [[1,0]], queries = [[0,1],[1,0]]
 <strong>Output:</strong> [false,true]
@@ -35,7 +35,7 @@ Course 0 is not a prerequisite of course 1, but the opposite is true.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-3-graph.jpg" style="width: 222px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1462.Course%20Schedule%20IV/images/courses4-3-graph.jpg" style="width: 222px; height: 222px;" />
 <pre>
 <strong>Input:</strong> numCourses = 3, prerequisites = [[1,2],[1,0],[2,0]], queries = [[1,0],[1,2]]
 <strong>Output:</strong> [true,true]
diff --git a/solution/1400-1499/1463.Cherry Pickup II/README.md b/solution/1400-1499/1463.Cherry Pickup II/README.md
index 3e92a9110454e..cfca67e344d05 100644
--- a/solution/1400-1499/1463.Cherry Pickup II/README.md	
+++ b/solution/1400-1499/1463.Cherry Pickup II/README.md	
@@ -24,7 +24,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_1_1802.png" style="height: 182px; width: 139px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_1_1802.png" style="height: 182px; width: 139px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[3,1,1],[2,5,1],[1,5,5],[2,1,1]]
 <strong>输出：</strong>24
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_2_1802.png" style="height: 257px; width: 284px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_2_1802.png" style="height: 257px; width: 284px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[1,0,0,0,0,0,1],[2,0,0,0,0,3,0],[2,0,9,0,0,0,0],[0,3,0,5,4,0,0],[1,0,2,3,0,0,6]]
 <strong>输出：</strong>28
diff --git a/solution/1400-1499/1463.Cherry Pickup II/README_EN.md b/solution/1400-1499/1463.Cherry Pickup II/README_EN.md
index 4c57fda79118f..37deb277308c5 100644
--- a/solution/1400-1499/1463.Cherry Pickup II/README_EN.md	
+++ b/solution/1400-1499/1463.Cherry Pickup II/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_1_1802.png" style="width: 374px; height: 501px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_1_1802.png" style="width: 374px; height: 501px;" />
 <pre>
 <strong>Input:</strong> grid = [[3,1,1],[2,5,1],[1,5,5],[2,1,1]]
 <strong>Output:</strong> 24
@@ -36,7 +36,7 @@ Total of cherries: 12 + 12 = 24.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_2_1802.png" style="width: 500px; height: 452px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1463.Cherry%20Pickup%20II/images/sample_2_1802.png" style="width: 500px; height: 452px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0,0,0,1],[2,0,0,0,0,3,0],[2,0,9,0,0,0,0],[0,3,0,5,4,0,0],[1,0,2,3,0,0,6]]
 <strong>Output:</strong> 28
diff --git a/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README.md b/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README.md
index 286f8ddd4753d..64288b9c33735 100644
--- a/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README.md	
+++ b/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_2.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_2.png" /></p>
 
 <pre>
 <strong>输入：</strong>h = 5, w = 4, horizontalCuts = [1,2,4], verticalCuts = [1,3]
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_3.png" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_3.png" /></strong></p>
 
 <pre>
 <strong>输入：</strong>h = 5, w = 4, horizontalCuts = [3,1], verticalCuts = [1]
diff --git a/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README_EN.md b/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README_EN.md
index b4f4c755a70ac..2588c874d84bf 100644
--- a/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README_EN.md	
+++ b/solution/1400-1499/1465.Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_2.png" style="width: 225px; height: 240px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_2.png" style="width: 225px; height: 240px;" />
 <pre>
 <strong>Input:</strong> h = 5, w = 4, horizontalCuts = [1,2,4], verticalCuts = [1,3]
 <strong>Output:</strong> 4 
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_3.png" style="width: 225px; height: 240px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1465.Maximum%20Area%20of%20a%20Piece%20of%20Cake%20After%20Horizontal%20and%20Vertical%20Cuts/images/leetcode_max_area_3.png" style="width: 225px; height: 240px;" />
 <pre>
 <strong>Input:</strong> h = 5, w = 4, horizontalCuts = [3,1], verticalCuts = [1]
 <strong>Output:</strong> 6
diff --git a/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README.md b/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README.md
index 6d9674d98197f..5cb6146717cb0 100644
--- a/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README.md	
+++ b/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_1_1819.png" style="height: 150px; width: 240px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_1_1819.png" style="height: 150px; width: 240px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 6, connections = [[0,1],[1,3],[2,3],[4,0],[4,5]]
 <strong>输出：</strong>3
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_2_1819.png" style="height: 60px; width: 380px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_2_1819.png" style="height: 60px; width: 380px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 5, connections = [[1,0],[1,2],[3,2],[3,4]]
 <strong>输出：</strong>2
diff --git a/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README_EN.md b/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README_EN.md
index 81f37ad4f5484..9cecf034619f5 100644
--- a/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README_EN.md	
+++ b/solution/1400-1499/1466.Reorder Routes to Make All Paths Lead to the City Zero/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_1_1819.png" style="width: 311px; height: 189px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_1_1819.png" style="width: 311px; height: 189px;" />
 <pre>
 <strong>Input:</strong> n = 6, connections = [[0,1],[1,3],[2,3],[4,0],[4,5]]
 <strong>Output:</strong> 3
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_2_1819.png" style="width: 509px; height: 79px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1466.Reorder%20Routes%20to%20Make%20All%20Paths%20Lead%20to%20the%20City%20Zero/images/sample_2_1819.png" style="width: 509px; height: 79px;" />
 <pre>
 <strong>Input:</strong> n = 5, connections = [[1,0],[1,2],[3,2],[3,4]]
 <strong>Output:</strong> 2
diff --git a/solution/1400-1499/1469.Find All The Lonely Nodes/README.md b/solution/1400-1499/1469.Find All The Lonely Nodes/README.md
index 20badfbcbffae..50e5657325981 100644
--- a/solution/1400-1499/1469.Find All The Lonely Nodes/README.md	
+++ b/solution/1400-1499/1469.Find All The Lonely Nodes/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e1.png" style="height:202px; width:203px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e1.png" style="height:202px; width:203px" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,4]
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e2.png" style="height:282px; width:442px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e2.png" style="height:282px; width:442px" /></p>
 
 <pre>
 <strong>输入：</strong>root = [7,1,4,6,null,5,3,null,null,null,null,null,2]
@@ -37,7 +37,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/tree.png" style="height:202px; width:363px" /> </strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/tree.png" style="height:202px; width:363px" /> </strong></p>
 
 <pre>
 <strong>输入：</strong>root = [11,99,88,77,null,null,66,55,null,null,44,33,null,null,22]
diff --git a/solution/1400-1499/1469.Find All The Lonely Nodes/README_EN.md b/solution/1400-1499/1469.Find All The Lonely Nodes/README_EN.md
index b744348dcf61e..47ac21ead3acc 100644
--- a/solution/1400-1499/1469.Find All The Lonely Nodes/README_EN.md	
+++ b/solution/1400-1499/1469.Find All The Lonely Nodes/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e1.png" style="width: 203px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e1.png" style="width: 203px; height: 202px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4]
 <strong>Output:</strong> [4]
@@ -20,7 +20,7 @@ Nodes 2 and 3 have the same parent and are not lonely.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e2.png" style="width: 442px; height: 282px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/e2.png" style="width: 442px; height: 282px;" />
 <pre>
 <strong>Input:</strong> root = [7,1,4,6,null,5,3,null,null,null,null,null,2]
 <strong>Output:</strong> [6,2]
@@ -29,7 +29,7 @@ Please remember that order doesn&#39;t matter, [2,6] is also an acceptable answe
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/tree.png" style="width: 363px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1469.Find%20All%20The%20Lonely%20Nodes/images/tree.png" style="width: 363px; height: 202px;" />
 <pre>
 <strong>
 Input:</strong> root = [11,99,88,77,null,null,66,55,null,null,44,33,null,null,22]
diff --git a/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README.md b/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README.md
index 200d576b9ff39..97a2bbba7c717 100644
--- a/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README.md	
+++ b/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_1_1848.png" style="height: 95px; width: 620px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_1_1848.png" style="height: 95px; width: 620px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> head = [1,2,3,4,5,6,7,8,9,10,11,12,13], m = 2, n = 3
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_2_1848.png" style="height: 123px; width: 620px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_2_1848.png" style="height: 123px; width: 620px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> head = [1,2,3,4,5,6,7,8,9,10,11], m = 1, n = 3
diff --git a/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README_EN.md b/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README_EN.md
index 6b350545cde6b..bf9554ee910c7 100644
--- a/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README_EN.md	
+++ b/solution/1400-1499/1474.Delete N Nodes After M Nodes of a Linked List/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_1_1848.png" style="width: 600px; height: 95px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_1_1848.png" style="width: 600px; height: 95px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5,6,7,8,9,10,11,12,13], m = 2, n = 3
 <strong>Output:</strong> [1,2,6,7,11,12]
@@ -30,7 +30,7 @@ Head of the linked list after removing nodes is returned.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_2_1848.png" style="width: 600px; height: 123px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1474.Delete%20N%20Nodes%20After%20M%20Nodes%20of%20a%20Linked%20List/images/sample_2_1848.png" style="width: 600px; height: 123px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5,6,7,8,9,10,11], m = 1, n = 3
 <strong>Output:</strong> [1,5,9]
diff --git a/solution/1400-1499/1478.Allocate Mailboxes/README.md b/solution/1400-1499/1478.Allocate Mailboxes/README.md
index 7a6f1a486c095..ba93abda40fdc 100644
--- a/solution/1400-1499/1478.Allocate Mailboxes/README.md	
+++ b/solution/1400-1499/1478.Allocate Mailboxes/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_11_1816.png" style="height: 154px; width: 454px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_11_1816.png" style="height: 154px; width: 454px;"></p>
 
 <pre><strong>输入：</strong>houses = [1,4,8,10,20], k = 3
 <strong>输出：</strong>5
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_2_1816.png" style="height: 154px; width: 433px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_2_1816.png" style="height: 154px; width: 433px;"></strong></p>
 
 <pre><strong>输入：</strong>houses = [2,3,5,12,18], k = 2
 <strong>输出：</strong>9
diff --git a/solution/1400-1499/1478.Allocate Mailboxes/README_EN.md b/solution/1400-1499/1478.Allocate Mailboxes/README_EN.md
index 8b32dafb9bee3..a1070e0898db4 100644
--- a/solution/1400-1499/1478.Allocate Mailboxes/README_EN.md	
+++ b/solution/1400-1499/1478.Allocate Mailboxes/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_11_1816.png" style="width: 454px; height: 154px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_11_1816.png" style="width: 454px; height: 154px;" />
 <pre>
 <strong>Input:</strong> houses = [1,4,8,10,20], k = 3
 <strong>Output:</strong> 5
@@ -21,7 +21,7 @@ Minimum total distance from each houses to nearest mailboxes is |3-1| + |4-3| +
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_2_1816.png" style="width: 433px; height: 154px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1478.Allocate%20Mailboxes/images/sample_2_1816.png" style="width: 433px; height: 154px;" />
 <pre>
 <strong>Input:</strong> houses = [2,3,5,12,18], k = 2
 <strong>Output:</strong> 9
diff --git a/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README.md b/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README.md
index 479745ce071f3..2d5cbfd621497 100644
--- a/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README.md	
+++ b/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1483.Kth%20Ancestor%20of%20a%20Tree%20Node/images/1528_ex1.png" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1483.Kth%20Ancestor%20of%20a%20Tree%20Node/images/1528_ex1.png" /></strong></p>
 
 <pre>
 <strong>输入：</strong>
diff --git a/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README_EN.md b/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README_EN.md
index a1569ab5d0fc4..469ebeb6a8d5f 100644
--- a/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README_EN.md	
+++ b/solution/1400-1499/1483.Kth Ancestor of a Tree Node/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1483.Kth%20Ancestor%20of%20a%20Tree%20Node/images/1528_ex1.png" style="width: 396px; height: 262px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1483.Kth%20Ancestor%20of%20a%20Tree%20Node/images/1528_ex1.png" style="width: 396px; height: 262px;" />
 <pre>
 <strong>Input</strong>
 [&quot;TreeAncestor&quot;, &quot;getKthAncestor&quot;, &quot;getKthAncestor&quot;, &quot;getKthAncestor&quot;]
diff --git a/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README.md b/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README.md
index 48fa7546041f1..5299b445e09ef 100644
--- a/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README.md	
+++ b/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_1.png" style="height: 473px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_1.png" style="height: 473px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [[1,null],null,[4,3],[7,0]]
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_2.png" style="height: 540px; width: 500px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_2.png" style="height: 540px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [[1,4],null,[1,0],null,[1,5],[1,5]]
@@ -46,7 +46,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/e2.png" style="height: 426px; width: 500px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/e2.png" style="height: 426px; width: 500px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [[1,6],[2,5],[3,4],[4,3],[5,2],[6,1],[7,0]]
diff --git a/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README_EN.md b/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README_EN.md
index 1cbda56d9e445..72f873b2a3e35 100644
--- a/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README_EN.md	
+++ b/solution/1400-1499/1485.Clone Binary Tree With Random Pointer/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_1.png" style="width: 500px; height: 473px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_1.png" style="width: 500px; height: 473px;" />
 <pre>
 <strong>Input:</strong> root = [[1,null],null,[4,3],[7,0]]
 <strong>Output:</strong> [[1,null],null,[4,3],[7,0]]
@@ -30,7 +30,7 @@ The random pointer of node 7 is node 1, so it is represented as [7, 0] where 0 i
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_2.png" style="width: 500px; height: 540px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_2.png" style="width: 500px; height: 540px;" />
 <pre>
 <strong>Input:</strong> root = [[1,4],null,[1,0],null,[1,5],[1,5]]
 <strong>Output:</strong> [[1,4],null,[1,0],null,[1,5],[1,5]]
@@ -38,7 +38,7 @@ The random pointer of node 7 is node 1, so it is represented as [7, 0] where 0 i
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_3.png" style="width: 500px; height: 426px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1485.Clone%20Binary%20Tree%20With%20Random%20Pointer/images/clone_3.png" style="width: 500px; height: 426px;" />
 <pre>
 <strong>Input:</strong> root = [[1,6],[2,5],[3,4],[4,3],[5,2],[6,1],[7,0]]
 <strong>Output:</strong> [[1,6],[2,5],[3,4],[4,3],[5,2],[6,1],[7,0]]
diff --git a/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README.md b/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README.md
index e1ed82c0ba990..3e51e82d49135 100644
--- a/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README.md	
+++ b/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README.md	
@@ -16,20 +16,20 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex1.png" style="height: 262px; width: 259px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex1.png" style="height: 262px; width: 259px;"></p>
 
 <pre><strong>输入：</strong>n = 5, edges = [[0,1,1],[1,2,1],[2,3,2],[0,3,2],[0,4,3],[3,4,3],[1,4,6]]
 <strong>输出：</strong>[[0,1],[2,3,4,5]]
 <strong>解释：</strong>上图描述了给定图。
 下图是所有的最小生成树。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/msts.png" style="height: 553px; width: 540px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/msts.png" style="height: 553px; width: 540px;">
 注意到第 0 条边和第 1 条边出现在了所有最小生成树中，所以它们是关键边，我们将这两个下标作为输出的第一个列表。
 边 2，3，4 和 5 是所有 MST 的剩余边，所以它们是伪关键边。我们将它们作为输出的第二个列表。
 </pre>
 
 <p><strong>示例 2 ：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex2.png" style="height: 253px; width: 247px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex2.png" style="height: 253px; width: 247px;"></p>
 
 <pre><strong>输入：</strong>n = 4, edges = [[0,1,1],[1,2,1],[2,3,1],[0,3,1]]
 <strong>输出：</strong>[[],[0,1,2,3]]
diff --git a/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README_EN.md b/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README_EN.md
index 588bce0656160..5b9403ad2dc7d 100644
--- a/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README_EN.md	
+++ b/solution/1400-1499/1489.Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree/README_EN.md	
@@ -13,21 +13,21 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex1.png" style="width: 259px; height: 262px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex1.png" style="width: 259px; height: 262px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1,1],[1,2,1],[2,3,2],[0,3,2],[0,4,3],[3,4,3],[1,4,6]]
 <strong>Output:</strong> [[0,1],[2,3,4,5]]
 <strong>Explanation:</strong> The figure above describes the graph.
 The following figure shows all the possible MSTs:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/msts.png" style="width: 540px; height: 553px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/msts.png" style="width: 540px; height: 553px;" />
 Notice that the two edges 0 and 1 appear in all MSTs, therefore they are critical edges, so we return them in the first list of the output.
 The edges 2, 3, 4, and 5 are only part of some MSTs, therefore they are considered pseudo-critical edges. We add them to the second list of the output.
 </pre>
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex2.png" style="width: 247px; height: 253px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1489.Find%20Critical%20and%20Pseudo-Critical%20Edges%20in%20Minimum%20Spanning%20Tree/images/ex2.png" style="width: 247px; height: 253px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4, edges = [[0,1,1],[1,2,1],[2,3,1],[0,3,1]]
diff --git a/solution/1400-1499/1490.Clone N-ary Tree/README.md b/solution/1400-1499/1490.Clone N-ary Tree/README.md
index 33ca4bd573812..06202d4e20091 100644
--- a/solution/1400-1499/1490.Clone N-ary Tree/README.md	
+++ b/solution/1400-1499/1490.Clone N-ary Tree/README.md	
@@ -23,7 +23,7 @@ class Node {
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/narytreeexample.png" style="width:330px" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/narytreeexample.png" style="width:330px" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -32,7 +32,7 @@ class Node {
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/sample_4_964.png" style="height:241px; width:296px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/sample_4_964.png" style="height:241px; width:296px" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/1400-1499/1490.Clone N-ary Tree/README_EN.md b/solution/1400-1499/1490.Clone N-ary Tree/README_EN.md
index 56c7b31044a2e..22253aa1aebde 100644
--- a/solution/1400-1499/1490.Clone N-ary Tree/README_EN.md	
+++ b/solution/1400-1499/1490.Clone N-ary Tree/README_EN.md	
@@ -20,7 +20,7 @@ class Node {
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
@@ -29,7 +29,7 @@ class Node {
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1490.Clone%20N-ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/1400-1499/1494.Parallel Courses II/README.md b/solution/1400-1499/1494.Parallel Courses II/README.md
index f5a72f01f6f9c..c14fa730bc94a 100644
--- a/solution/1400-1499/1494.Parallel Courses II/README.md	
+++ b/solution/1400-1499/1494.Parallel Courses II/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_1.png" style="height: 164px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_1.png" style="height: 164px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, dependencies = [[2,1],[3,1],[1,4]], k = 2
 <strong>输出：</strong>3 
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_2.png" style="height: 234px; width: 300px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_2.png" style="height: 234px; width: 300px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 5, dependencies = [[2,1],[3,1],[4,1],[1,5]], k = 2
 <strong>输出：</strong>4 
diff --git a/solution/1400-1499/1494.Parallel Courses II/README_EN.md b/solution/1400-1499/1494.Parallel Courses II/README_EN.md
index ceee36e389935..62b3758844085 100644
--- a/solution/1400-1499/1494.Parallel Courses II/README_EN.md	
+++ b/solution/1400-1499/1494.Parallel Courses II/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_1.png" style="width: 300px; height: 164px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_1.png" style="width: 300px; height: 164px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 4, dependencies = [[2,1],[3,1],[1,4]], k = 2
@@ -26,7 +26,7 @@ In the third semester, you can take course 4.
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_2.png" style="width: 300px; height: 234px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1494.Parallel%20Courses%20II/images/leetcode_parallel_courses_2.png" style="width: 300px; height: 234px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 5, dependencies = [[2,1],[3,1],[4,1],[1,5]], k = 2
diff --git a/solution/1400-1499/1496.Path Crossing/README.md b/solution/1400-1499/1496.Path Crossing/README.md
index 4bc64a1f9f749..de888345ff73c 100644
--- a/solution/1400-1499/1496.Path Crossing/README.md	
+++ b/solution/1400-1499/1496.Path Crossing/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123929-pm.png" style="height: 358px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123929-pm.png" style="height: 358px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>path = "NES"
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123843-pm.png" style="height: 339px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123843-pm.png" style="height: 339px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>path = "NESWW"
diff --git a/solution/1400-1499/1496.Path Crossing/README_EN.md b/solution/1400-1499/1496.Path Crossing/README_EN.md
index 69cfc93879e5f..945f11d894088 100644
--- a/solution/1400-1499/1496.Path Crossing/README_EN.md	
+++ b/solution/1400-1499/1496.Path Crossing/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123929-pm.png" style="width: 400px; height: 358px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123929-pm.png" style="width: 400px; height: 358px;" />
 <pre>
 <strong>Input:</strong> path = &quot;NES&quot;
 <strong>Output:</strong> false 
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123843-pm.png" style="width: 400px; height: 339px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1400-1499/1496.Path%20Crossing/images/screen-shot-2020-06-10-at-123843-pm.png" style="width: 400px; height: 339px;" />
 <pre>
 <strong>Input:</strong> path = &quot;NESWW&quot;
 <strong>Output:</strong> true
diff --git a/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README.md b/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README.md
index 2533158a6d9cb..d6775d6d9572d 100644
--- a/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README.md	
+++ b/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants.jpg" style="height: 610px; width: 450px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants.jpg" style="height: 610px; width: 450px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, left = [4,3], right = [0,1]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants2.jpg" style="height: 101px; width: 639px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants2.jpg" style="height: 101px; width: 639px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, left = [], right = [0,1,2,3,4,5,6,7]
@@ -44,7 +44,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants3.jpg" style="height: 100px; width: 639px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants3.jpg" style="height: 100px; width: 639px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, left = [0,1,2,3,4,5,6,7], right = []
diff --git a/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README_EN.md b/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README_EN.md
index ea5892bfefc9a..10df2e1a3dabb 100644
--- a/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README_EN.md	
+++ b/solution/1500-1599/1503.Last Moment Before All Ants Fall Out of a Plank/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants.jpg" style="width: 450px; height: 610px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants.jpg" style="width: 450px; height: 610px;" />
 <pre>
 <strong>Input:</strong> n = 4, left = [4,3], right = [0,1]
 <strong>Output:</strong> 4
@@ -27,7 +27,7 @@ The last moment when an ant was on the plank is t = 4 seconds. After that, it fa
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants2.jpg" style="width: 639px; height: 101px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants2.jpg" style="width: 639px; height: 101px;" />
 <pre>
 <strong>Input:</strong> n = 7, left = [], right = [0,1,2,3,4,5,6,7]
 <strong>Output:</strong> 7
@@ -35,7 +35,7 @@ The last moment when an ant was on the plank is t = 4 seconds. After that, it fa
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants3.jpg" style="width: 639px; height: 100px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1503.Last%20Moment%20Before%20All%20Ants%20Fall%20Out%20of%20a%20Plank/images/ants3.jpg" style="width: 639px; height: 100px;" />
 <pre>
 <strong>Input:</strong> n = 7, left = [0,1,2,3,4,5,6,7], right = []
 <strong>Output:</strong> 7
diff --git a/solution/1500-1599/1504.Count Submatrices With All Ones/README.md b/solution/1500-1599/1504.Count Submatrices With All Ones/README.md
index 8b32095402b45..0a6c32b6cd654 100644
--- a/solution/1500-1599/1504.Count Submatrices With All Ones/README.md	
+++ b/solution/1500-1599/1504.Count Submatrices With All Ones/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones1-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones1-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[1,0,1],[1,1,0],[1,1,0]]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones2-grid.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones2-grid.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[0,1,1,0],[0,1,1,1],[1,1,1,0]]
diff --git a/solution/1500-1599/1504.Count Submatrices With All Ones/README_EN.md b/solution/1500-1599/1504.Count Submatrices With All Ones/README_EN.md
index 19188363396e3..b2b5637f6ad0b 100644
--- a/solution/1500-1599/1504.Count Submatrices With All Ones/README_EN.md	
+++ b/solution/1500-1599/1504.Count Submatrices With All Ones/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones1-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones1-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,0,1],[1,1,0],[1,1,0]]
 <strong>Output:</strong> 13
@@ -22,7 +22,7 @@ Total number of rectangles = 6 + 2 + 3 + 1 + 1 = 13.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones2-grid.jpg" style="width: 324px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1504.Count%20Submatrices%20With%20All%20Ones/images/ones2-grid.jpg" style="width: 324px; height: 245px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,1,1,0],[0,1,1,1],[1,1,1,0]]
 <strong>Output:</strong> 24
diff --git a/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README.md b/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README.md
index db91055fdf92f..6ddf9e826923f 100644
--- a/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README.md	
+++ b/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1505.Minimum%20Possible%20Integer%20After%20at%20Most%20K%20Adjacent%20Swaps%20On%20Digits/images/q4_1.jpg" style="height:40px; width:500px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1505.Minimum%20Possible%20Integer%20After%20at%20Most%20K%20Adjacent%20Swaps%20On%20Digits/images/q4_1.jpg" style="height:40px; width:500px" /></p>
 
 <pre>
 <strong>输入：</strong>num = &quot;4321&quot;, k = 4
diff --git a/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README_EN.md b/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README_EN.md
index 320f1e6fe4cf8..0de583edae40a 100644
--- a/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README_EN.md	
+++ b/solution/1500-1599/1505.Minimum Possible Integer After at Most K Adjacent Swaps On Digits/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1505.Minimum%20Possible%20Integer%20After%20at%20Most%20K%20Adjacent%20Swaps%20On%20Digits/images/q4_1.jpg" style="width: 500px; height: 40px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1505.Minimum%20Possible%20Integer%20After%20at%20Most%20K%20Adjacent%20Swaps%20On%20Digits/images/q4_1.jpg" style="width: 500px; height: 40px;" />
 <pre>
 <strong>Input:</strong> num = &quot;4321&quot;, k = 4
 <strong>Output:</strong> &quot;1342&quot;
diff --git a/solution/1500-1599/1506.Find Root of N-Ary Tree/README.md b/solution/1500-1599/1506.Find Root of N-Ary Tree/README.md
index a86685dbd5908..e9c51d368d43d 100644
--- a/solution/1500-1599/1506.Find Root of N-Ary Tree/README.md	
+++ b/solution/1500-1599/1506.Find Root of N-Ary Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><em>N 叉树的输入序列为其层序遍历序列，每组子节点用 null 分隔（见示例）。</em></p>
 
-<p><em><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width:300px" /></em></p>
+<p><em><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width:300px" /></em></p>
 
 <p>上图中的 N 叉树的序列化描述为 <code>[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]</code> 。</p>
 
@@ -33,7 +33,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/narytreeexample.png" style="width:250px" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/narytreeexample.png" style="width:250px" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [1,null,3,2,4,null,5,6]
@@ -46,7 +46,7 @@ findRoot 函数应该返回根 Node(1) ，驱动程序代码将序列化它并
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="height:241px; width:296px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="height:241px; width:296px" /></p>
 
 <pre>
 <strong>输入：</strong>tree = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/1500-1599/1506.Find Root of N-Ary Tree/README_EN.md b/solution/1500-1599/1506.Find Root of N-Ary Tree/README_EN.md
index a1cb5cb7f3782..765898f6fe117 100644
--- a/solution/1500-1599/1506.Find Root of N-Ary Tree/README_EN.md	
+++ b/solution/1500-1599/1506.Find Root of N-Ary Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>An N-ary tree can be serialized as represented in its level order traversal where each group of children is separated by the <code>null</code> value (see examples).</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <p>For example, the above tree is serialized as <code>[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]</code>.</p>
 
@@ -28,7 +28,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/narytreeexample.png" style="width: 100%; max-width: 300px;" /></p>
 
 <pre>
 <strong>Input:</strong> tree = [1,null,3,2,4,null,5,6]
@@ -42,7 +42,7 @@ The input data and serialized Node(1) are the same, so the test passes.
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1506.Find%20Root%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <pre>
 <strong>Input:</strong> tree = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/1500-1599/1514.Path with Maximum Probability/README.md b/solution/1500-1599/1514.Path with Maximum Probability/README.md
index 48ffba535f975..e38849a4e36af 100644
--- a/solution/1500-1599/1514.Path with Maximum Probability/README.md	
+++ b/solution/1500-1599/1514.Path with Maximum Probability/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex1.png" style="height: 186px; width: 187px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex1.png" style="height: 186px; width: 187px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 3, edges = [[0,1],[1,2],[0,2]], succProb = [0.5,0.5,0.2], start = 0, end = 2
 <strong>输出：</strong>0.25000
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex2.png" style="height: 186px; width: 189px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex2.png" style="height: 186px; width: 189px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 3, edges = [[0,1],[1,2],[0,2]], succProb = [0.5,0.5,0.3], start = 0, end = 2
 <strong>输出：</strong>0.30000
@@ -33,7 +33,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex3.png" style="height: 191px; width: 215px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex3.png" style="height: 191px; width: 215px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 3, edges = [[0,1]], succProb = [0.5], start = 0, end = 2
 <strong>输出：</strong>0.00000
diff --git a/solution/1500-1599/1514.Path with Maximum Probability/README_EN.md b/solution/1500-1599/1514.Path with Maximum Probability/README_EN.md
index 8c1f6249d6e4c..03e74d3e969bd 100644
--- a/solution/1500-1599/1514.Path with Maximum Probability/README_EN.md	
+++ b/solution/1500-1599/1514.Path with Maximum Probability/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex1.png" style="width: 187px; height: 186px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex1.png" style="width: 187px; height: 186px;" /></strong></p>
 
 <pre>
 
@@ -28,7 +28,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex2.png" style="width: 189px; height: 186px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex2.png" style="width: 189px; height: 186px;" /></strong></p>
 
 <pre>
 
@@ -40,7 +40,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex3.png" style="width: 215px; height: 191px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1514.Path%20with%20Maximum%20Probability/images/1558_ex3.png" style="width: 215px; height: 191px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1500-1599/1515.Best Position for a Service Centre/README.md b/solution/1500-1599/1515.Best Position for a Service Centre/README.md
index dd0b279354029..253ce2e44bd21 100644
--- a/solution/1500-1599/1515.Best Position for a Service Centre/README.md	
+++ b/solution/1500-1599/1515.Best Position for a Service Centre/README.md	
@@ -12,7 +12,7 @@
 
 <p>换句话说，请你为服务中心选址，该位置的坐标 <code>[x<sub>centre</sub>, y<sub>centre</sub>]</code> 需要使下面的公式取到最小值：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_edited.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_edited.jpg" /></p>
 
 <p>与真实值误差在 <code>10<sup>-5</sup></code>之内的答案将被视作正确答案。</p>
 
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>positions = [[0,1],[1,0],[1,2],[2,1]]
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e3.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e3.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>positions = [[1,1],[3,3]]
diff --git a/solution/1500-1599/1515.Best Position for a Service Centre/README_EN.md b/solution/1500-1599/1515.Best Position for a Service Centre/README_EN.md
index 6b55d2711022e..6328886b46a78 100644
--- a/solution/1500-1599/1515.Best Position for a Service Centre/README_EN.md	
+++ b/solution/1500-1599/1515.Best Position for a Service Centre/README_EN.md	
@@ -9,12 +9,12 @@
 <p>Given an array <code>positions</code> where <code>positions[i] = [x<sub>i</sub>, y<sub>i</sub>]</code> is the position of the <code>ith</code> customer on the map, return <em>the minimum sum of the euclidean distances</em> to all customers.</p>
 
 <p>In other words, you need to choose the position of the service center <code>[x<sub>centre</sub>, y<sub>centre</sub>]</code> such that the following formula is minimized:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_edited.jpg" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_edited.jpg" />
 <p>Answers within <code>10<sup>-5</sup></code> of the actual value will be accepted.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e1.jpg" style="width: 377px; height: 362px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e1.jpg" style="width: 377px; height: 362px;" />
 <pre>
 <strong>Input:</strong> positions = [[0,1],[1,0],[1,2],[2,1]]
 <strong>Output:</strong> 4.00000
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e3.jpg" style="width: 419px; height: 419px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1515.Best%20Position%20for%20a%20Service%20Centre/images/q4_e3.jpg" style="width: 419px; height: 419px;" />
 <pre>
 <strong>Input:</strong> positions = [[1,1],[3,3]]
 <strong>Output:</strong> 2.82843
diff --git a/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README.md b/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README.md
index 5432a9f4915e0..10f03bcbf40d7 100644
--- a/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README.md	
+++ b/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README.md	
@@ -28,7 +28,7 @@
 
 <p><em>N 叉树的输入序列以层序遍历的形式给出，每组子节点用 null 分隔（见示例）。</em></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/sample_4_964.png" style="height: 269px; width: 296px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/sample_4_964.png" style="height: 269px; width: 296px;" /></p>
 
 <p>例如，上面的树会被序列化为&nbsp;[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]。</p>
 
@@ -36,7 +36,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e1.jpg" style="height: 188px; width: 450px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e1.jpg" style="height: 188px; width: 450px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 4, q = 1
@@ -46,7 +46,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e2.jpg" style="height: 281px; width: 281px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e2.jpg" style="height: 281px; width: 281px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 7, q = 4
@@ -56,7 +56,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e3.jpg" style="height: 331px; width: 450px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e3.jpg" style="height: 331px; width: 450px;" /></p>
 
 <pre>
 <strong>输入:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 3, q = 8
diff --git a/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README_EN.md b/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README_EN.md
index 3756159702a4c..95701bfb52218 100644
--- a/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README_EN.md	
+++ b/solution/1500-1599/1516.Move Sub-Tree of N-Ary Tree/README_EN.md	
@@ -26,13 +26,13 @@
 
 <p><em>Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples).</em></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/sample_4_964.png" style="width: 296px; height: 241px;" /></p>
 
 <p>For example, the above tree is serialized as <code>[1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]</code>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e1.jpg" style="width: 450px; height: 188px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e1.jpg" style="width: 450px; height: 188px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 4, q = 1
 <strong>Output:</strong> [1,null,2,3,4,null,5,null,6,null,7,8]
@@ -40,7 +40,7 @@
 Notice that node 4 is the last child of node 1.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e2.jpg" style="width: 281px; height: 281px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e2.jpg" style="width: 281px; height: 281px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 7, q = 4
 <strong>Output:</strong> [1,null,2,3,null,4,5,null,6,null,7,8]
@@ -48,7 +48,7 @@ Notice that node 4 is the last child of node 1.</pre>
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e3.jpg" style="width: 450px; height: 331px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1516.Move%20Sub-Tree%20of%20N-Ary%20Tree/images/move_e3.jpg" style="width: 450px; height: 331px;" />
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,null,4,5,null,6,null,7,8], p = 3, q = 8
 <strong>Output:</strong> [1,null,2,null,4,5,null,7,8,null,null,null,3,null,6]
diff --git a/solution/1500-1599/1518.Water Bottles/README.md b/solution/1500-1599/1518.Water Bottles/README.md
index b39d6581156c0..55b931b26564a 100644
--- a/solution/1500-1599/1518.Water Bottles/README.md	
+++ b/solution/1500-1599/1518.Water Bottles/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_1_1875.png" style="height: 240px; width: 480px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_1_1875.png" style="height: 240px; width: 480px;"></strong></p>
 
 <pre><strong>输入：</strong>numBottles = 9, numExchange = 3
 <strong>输出：</strong>13
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_2_1875.png" style="height: 240px; width: 790px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_2_1875.png" style="height: 240px; width: 790px;"></p>
 
 <pre><strong>输入：</strong>numBottles = 15, numExchange = 4
 <strong>输出：</strong>19
diff --git a/solution/1500-1599/1518.Water Bottles/README_EN.md b/solution/1500-1599/1518.Water Bottles/README_EN.md
index a7f727b895cf2..71d4b33889dd3 100644
--- a/solution/1500-1599/1518.Water Bottles/README_EN.md	
+++ b/solution/1500-1599/1518.Water Bottles/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_1_1875.png" style="width: 500px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_1_1875.png" style="width: 500px; height: 245px;" />
 <pre>
 <strong>Input:</strong> numBottles = 9, numExchange = 3
 <strong>Output:</strong> 13
@@ -21,7 +21,7 @@ Number of water bottles you can drink: 9 + 3 + 1 = 13.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_2_1875.png" style="width: 500px; height: 183px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1518.Water%20Bottles/images/sample_2_1875.png" style="width: 500px; height: 183px;" />
 <pre>
 <strong>Input:</strong> numBottles = 15, numExchange = 4
 <strong>Output:</strong> 19
diff --git a/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README.md b/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README.md
index ede9164b84439..1031254a0f1ab 100644
--- a/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README.md	
+++ b/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e1.jpg" style="height: 321px; width: 441px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e1.jpg" style="height: 321px; width: 441px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], labels = "abaedcd"
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e2.jpg" style="height: 321px; width: 381px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e2.jpg" style="height: 321px; width: 381px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, edges = [[0,1],[1,2],[0,3]], labels = "bbbb"
@@ -42,7 +42,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e3.jpg" style="height: 321px; width: 381px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e3.jpg" style="height: 321px; width: 381px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 5, edges = [[0,1],[0,2],[1,3],[0,4]], labels = "aabab"
diff --git a/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README_EN.md b/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README_EN.md
index 5542cd99b5cd9..794b8e366e8fd 100644
--- a/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README_EN.md	
+++ b/solution/1500-1599/1519.Number of Nodes in the Sub-Tree With the Same Label/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e1.jpg" style="width: 400px; height: 291px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e1.jpg" style="width: 400px; height: 291px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[0,1],[0,2],[1,4],[1,5],[2,3],[2,6]], labels = &quot;abaedcd&quot;
 <strong>Output:</strong> [2,1,1,1,1,1,1]
@@ -23,7 +23,7 @@ Node 1 has a label &#39;b&#39;. The sub-tree of node 1 contains nodes 1,4 and 5,
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e2.jpg" style="width: 300px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e2.jpg" style="width: 300px; height: 253px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[0,1],[1,2],[0,3]], labels = &quot;bbbb&quot;
 <strong>Output:</strong> [4,2,1,1]
@@ -34,7 +34,7 @@ The sub-tree of node 0 contains nodes 0, 1, 2 and 3, all with label &#39;b&#39;,
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e3.jpg" style="width: 300px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1519.Number%20of%20Nodes%20in%20the%20Sub-Tree%20With%20the%20Same%20Label/images/q3e3.jpg" style="width: 300px; height: 253px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[0,1],[0,2],[1,3],[0,4]], labels = &quot;aabab&quot;
 <strong>Output:</strong> [3,2,1,1,1]
diff --git a/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README.md b/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README.md
index d43a70680793c..f88231f844562 100644
--- a/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README.md	
+++ b/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README.md	
@@ -6,7 +6,7 @@
 
 <!-- 这里写题目描述 -->
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1521.Find%20a%20Value%20of%20a%20Mysterious%20Function%20Closest%20to%20Target/images/change.png" style="height: 312px; width: 635px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1521.Find%20a%20Value%20of%20a%20Mysterious%20Function%20Closest%20to%20Target/images/change.png" style="height: 312px; width: 635px;"></p>
 
 <p>Winston 构造了一个如上所示的函数&nbsp;<code>func</code>&nbsp;。他有一个整数数组&nbsp;<code>arr</code>&nbsp;和一个整数&nbsp;<code>target</code>&nbsp;，他想找到让&nbsp;<code>|func(arr, l, r) - target|</code>&nbsp;最小的 <code>l</code>&nbsp;和 <code>r</code>&nbsp;。</p>
 
diff --git a/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README_EN.md b/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README_EN.md
index fac9bc1ec7e82..8b59b6a050092 100644
--- a/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README_EN.md	
+++ b/solution/1500-1599/1521.Find a Value of a Mysterious Function Closest to Target/README_EN.md	
@@ -4,7 +4,7 @@
 
 ## Description
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1521.Find%20a%20Value%20of%20a%20Mysterious%20Function%20Closest%20to%20Target/images/change.png" style="width: 635px; height: 312px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1521.Find%20a%20Value%20of%20a%20Mysterious%20Function%20Closest%20to%20Target/images/change.png" style="width: 635px; height: 312px;" /></p>
 
 <p>Winston was given the above mysterious function <code>func</code>. He has an integer array <code>arr</code> and an integer <code>target</code> and he wants to find the values <code>l</code> and <code>r</code> that make the value <code>|func(arr, l, r) - target|</code> minimum possible.</p>
 
diff --git a/solution/1500-1599/1522.Diameter of N-Ary Tree/README.md b/solution/1500-1599/1522.Diameter of N-Ary Tree/README.md
index 77c4502113eeb..b33e894f52445 100644
--- a/solution/1500-1599/1522.Diameter of N-Ary Tree/README.md	
+++ b/solution/1500-1599/1522.Diameter of N-Ary Tree/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_2_1897.png" style="height:173px; width:324px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_2_1897.png" style="height:173px; width:324px" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,3,2,4,null,5,6]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_1_1897.png" style="height:246px; width:253px" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_1_1897.png" style="height:246px; width:253px" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,null,2,null,3,4,null,5,null,6]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_3_1897.png" style="height:326px; width:369px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_3_1897.png" style="height:326px; width:369px" /></p>
 
 <pre>
 <strong>输入:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
@@ -72,7 +72,7 @@
     -   当 y 到达的最远结点 z 横穿 δ(s, t) 时，记与之相交的结点为 x。此时有 δ(y, z) = δ(y, x) + δ(x, z)。而此时 δ(y, z) > δ(y, t)，故可得 δ(x, z) ＞ δ(x, t)。由 1 的结论可知该假设不成立。
     -   当 y 到达的最远结点 z 与 δ(s, t) 不相交时，定义从 y 开始到 t 结束的简单路径上，第一个同时也存在于简单路径 δ(s, t) 上的结点为 x，最后一个存在于简单路径 δ(y, z) 上的结点为 x’。如下图。那么根据假设，有 δ(y, z) ≥ δ(y, t) => δ(x', z) ≥ δ(x', x) + δ(x, t)。既然这样，那么 δ(x, z) ≥ δ(x, t)，和 δ(s, t) 对应着直径这一前提不符，故 y 的最远结点 z 不可能在 s 到 t 这个直径对应的路外面。
 
-    <img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/tree-diameter.svg">
+    <img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/tree-diameter.svg">
 
 因此定理成立。
 
diff --git a/solution/1500-1599/1522.Diameter of N-Ary Tree/README_EN.md b/solution/1500-1599/1522.Diameter of N-Ary Tree/README_EN.md
index 4738820cb8fdd..3ad905003f2a0 100644
--- a/solution/1500-1599/1522.Diameter of N-Ary Tree/README_EN.md	
+++ b/solution/1500-1599/1522.Diameter of N-Ary Tree/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_2_1897.png" style="width: 324px; height: 173px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_2_1897.png" style="width: 324px; height: 173px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,3,2,4,null,5,6]
@@ -22,7 +22,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_1_1897.png" style="width: 253px; height: 246px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_1_1897.png" style="width: 253px; height: 246px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,null,3,4,null,5,null,6]
@@ -31,7 +31,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_3_1897.png" style="width: 369px; height: 326px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1522.Diameter%20of%20N-Ary%20Tree/images/sample_3_1897.png" style="width: 369px; height: 326px;" /></p>
 
 <pre>
 <strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
diff --git a/solution/1500-1599/1528.Shuffle String/README.md b/solution/1500-1599/1528.Shuffle String/README.md
index 235f1b60e2ba9..05f24c2387414 100644
--- a/solution/1500-1599/1528.Shuffle String/README.md	
+++ b/solution/1500-1599/1528.Shuffle String/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1528.Shuffle%20String/images/q1.jpg" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1528.Shuffle%20String/images/q1.jpg" /></p>
 
 <pre>
 <strong>输入：</strong>s = "codeleet", <code>indices</code> = [4,5,6,7,0,2,1,3]
diff --git a/solution/1500-1599/1528.Shuffle String/README_EN.md b/solution/1500-1599/1528.Shuffle String/README_EN.md
index ad98933affeef..53e9f432a128b 100644
--- a/solution/1500-1599/1528.Shuffle String/README_EN.md	
+++ b/solution/1500-1599/1528.Shuffle String/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1528.Shuffle%20String/images/q1.jpg" style="width: 321px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1528.Shuffle%20String/images/q1.jpg" style="width: 321px; height: 243px;" />
 <pre>
 <strong>Input:</strong> s = &quot;codeleet&quot;, <code>indices</code> = [4,5,6,7,0,2,1,3]
 <strong>Output:</strong> &quot;leetcode&quot;
diff --git a/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README.md b/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README.md
index 99058c61e75fa..485f29de1ddd4 100644
--- a/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README.md	
+++ b/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e1.jpg" style="height: 321px; width: 321px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e1.jpg" style="height: 321px; width: 321px;"></p>
 
 <pre><strong>输入：</strong>root = [1,2,3,null,4], distance = 3
 <strong>输出：</strong>1
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e2.jpg" style="height: 321px; width: 441px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e2.jpg" style="height: 321px; width: 441px;"></p>
 
 <pre><strong>输入：</strong>root = [1,2,3,4,5,6,7], distance = 3
 <strong>输出：</strong>2
diff --git a/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README_EN.md b/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README_EN.md
index 918a2aa06c744..61ea4ba619e41 100644
--- a/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README_EN.md	
+++ b/solution/1500-1599/1530.Number of Good Leaf Nodes Pairs/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e1.jpg" style="width: 250px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e1.jpg" style="width: 250px; height: 250px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4], distance = 3
 <strong>Output:</strong> 1
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e2.jpg" style="width: 250px; height: 182px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1530.Number%20of%20Good%20Leaf%20Nodes%20Pairs/images/e2.jpg" style="width: 250px; height: 182px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,4,5,6,7], distance = 3
 <strong>Output:</strong> 2
diff --git a/solution/1500-1599/1535.Find the Winner of an Array Game/README.md b/solution/1500-1599/1535.Find the Winner of an Array Game/README.md
index ecb69acd9eef7..0db2eb49c0204 100644
--- a/solution/1500-1599/1535.Find the Winner of an Array Game/README.md	
+++ b/solution/1500-1599/1535.Find the Winner of an Array Game/README.md	
@@ -21,7 +21,7 @@
 <pre><strong>输入：</strong>arr = [2,1,3,5,4,6,7], k = 2
 <strong>输出：</strong>5
 <strong>解释：</strong>一起看一下本场游戏每回合的情况：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1535.Find%20the%20Winner%20of%20an%20Array%20Game/images/q-example.png" style="height: 90px; width: 400px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1535.Find%20the%20Winner%20of%20an%20Array%20Game/images/q-example.png" style="height: 90px; width: 400px;">
 因此将进行 4 回合比赛，其中 5 是赢家，因为它连胜 2 回合。
 </pre>
 
diff --git a/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README.md b/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README.md
index 4a2eb7dfbc891..de56b2a269596 100644
--- a/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README.md	
+++ b/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/fw.jpg" style="height: 141px; width: 750px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/fw.jpg" style="height: 141px; width: 750px;"></p>
 
 <pre><strong>输入：</strong>grid = [[0,0,1],[1,1,0],[1,0,0]]
 <strong>输出：</strong>3
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e2.jpg" style="height: 270px; width: 270px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e2.jpg" style="height: 270px; width: 270px;"></p>
 
 <pre><strong>输入：</strong>grid = [[0,1,1,0],[0,1,1,0],[0,1,1,0],[0,1,1,0]]
 <strong>输出：</strong>-1
@@ -35,7 +35,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e3.jpg" style="height: 210px; width: 210px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e3.jpg" style="height: 210px; width: 210px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,0,0],[1,1,0],[1,1,1]]
 <strong>输出：</strong>0
diff --git a/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README_EN.md b/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README_EN.md
index 109a875d80cc1..38f0240135fa6 100644
--- a/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README_EN.md	
+++ b/solution/1500-1599/1536.Minimum Swaps to Arrange a Binary Grid/README_EN.md	
@@ -14,14 +14,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/fw.jpg" style="width: 750px; height: 141px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/fw.jpg" style="width: 750px; height: 141px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,1],[1,1,0],[1,0,0]]
 <strong>Output:</strong> 3
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e2.jpg" style="width: 270px; height: 270px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e2.jpg" style="width: 270px; height: 270px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,1,0],[0,1,1,0],[0,1,1,0],[0,1,1,0]]
 <strong>Output:</strong> -1
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e3.jpg" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1536.Minimum%20Swaps%20to%20Arrange%20a%20Binary%20Grid/images/e3.jpg" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0],[1,1,0],[1,1,1]]
 <strong>Output:</strong> 0
diff --git a/solution/1500-1599/1537.Get the Maximum Score/README.md b/solution/1500-1599/1537.Get the Maximum Score/README.md
index dc4d6c2e605e8..a9bc1e761d133 100644
--- a/solution/1500-1599/1537.Get the Maximum Score/README.md	
+++ b/solution/1500-1599/1537.Get the Maximum Score/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1537.Get%20the%20Maximum%20Score/images/sample_1_1893.png" style="height: 163px; width: 538px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1537.Get%20the%20Maximum%20Score/images/sample_1_1893.png" style="height: 163px; width: 538px;"></strong></p>
 
 <pre><strong>输入：</strong>nums1 = [2,4,5,8,10], nums2 = [4,6,8,9]
 <strong>输出：</strong>30
diff --git a/solution/1500-1599/1537.Get the Maximum Score/README_EN.md b/solution/1500-1599/1537.Get the Maximum Score/README_EN.md
index 2369ffe84c675..17877dca5439d 100644
--- a/solution/1500-1599/1537.Get the Maximum Score/README_EN.md	
+++ b/solution/1500-1599/1537.Get the Maximum Score/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1537.Get%20the%20Maximum%20Score/images/sample_1_1893.png" style="width: 500px; height: 151px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1537.Get%20the%20Maximum%20Score/images/sample_1_1893.png" style="width: 500px; height: 151px;" />
 <pre>
 <strong>Input:</strong> nums1 = [2,4,5,8,10], nums2 = [4,6,8,9]
 <strong>Output:</strong> 30
diff --git a/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README.md b/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README.md
index 5bf647a1732ef..69b2b1ff19dd1 100644
--- a/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README.md	
+++ b/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README.md	
@@ -8,7 +8,7 @@
 
 <p>有一根长度为 <code>n</code> 个单位的木棍，棍上从 <code>0</code> 到 <code>n</code> 标记了若干位置。例如，长度为 <strong>6</strong> 的棍子可以标记如下：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/statement.jpg" style="height: 111px; width: 521px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/statement.jpg" style="height: 111px; width: 521px;" /></p>
 
 <p>给你一个整数数组 <code>cuts</code> ，其中 <code>cuts[i]</code> 表示你需要将棍子切开的位置。</p>
 
@@ -22,13 +22,13 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e1.jpg" style="height: 284px; width: 350px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e1.jpg" style="height: 284px; width: 350px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 7, cuts = [1,3,4,5]
 <strong>输出：</strong>16
 <strong>解释：</strong>按 [1, 3, 4, 5] 的顺序切割的情况如下所示：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e11.jpg" style="height: 284px; width: 350px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e11.jpg" style="height: 284px; width: 350px;" />
 第一次切割长度为 7 的棍子，成本为 7 。第二次切割长度为 6 的棍子（即第一次切割得到的第二根棍子），第三次切割为长度 4 的棍子，最后切割长度为 3 的棍子。总成本为 7 + 6 + 4 + 3 = 20 。
 而将切割顺序重新排列为 [3, 5, 1, 4] 后，总成本 = 16（如示例图中 7 + 4 + 3 + 2 = 16）。
 </pre>
diff --git a/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README_EN.md b/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README_EN.md
index bb337371e74d9..c3d39836c6938 100644
--- a/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README_EN.md	
+++ b/solution/1500-1599/1547.Minimum Cost to Cut a Stick/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>Given a wooden stick of length <code>n</code> units. The stick is labelled from <code>0</code> to <code>n</code>. For example, a stick of length <strong>6</strong> is labelled as follows:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/statement.jpg" style="width: 521px; height: 111px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/statement.jpg" style="width: 521px; height: 111px;" />
 <p>Given an integer array <code>cuts</code> where <code>cuts[i]</code> denotes a position you should perform a cut at.</p>
 
 <p>You should perform the cuts in order, you can change the order of the cuts as you wish.</p>
@@ -16,12 +16,12 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e1.jpg" style="width: 350px; height: 284px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e1.jpg" style="width: 350px; height: 284px;" />
 <pre>
 <strong>Input:</strong> n = 7, cuts = [1,3,4,5]
 <strong>Output:</strong> 16
 <strong>Explanation:</strong> Using cuts order = [1, 3, 4, 5] as in the input leads to the following scenario:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e11.jpg" style="width: 350px; height: 284px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1547.Minimum%20Cost%20to%20Cut%20a%20Stick/images/e11.jpg" style="width: 350px; height: 284px;" />
 The first cut is done to a rod of length 7 so the cost is 7. The second cut is done to a rod of length 6 (i.e. the second part of the first cut), the third is done to a rod of length 4 and the last cut is to a rod of length 3. The total cost is 7 + 6 + 4 + 3 = 20.
 Rearranging the cuts to be [3, 5, 1, 4] for example will lead to a scenario with total cost = 16 (as shown in the example photo 7 + 4 + 3 + 2 = 16).</pre>
 
diff --git a/solution/1500-1599/1548.The Most Similar Path in a Graph/README.md b/solution/1500-1599/1548.The Most Similar Path in a Graph/README.md
index 2214930d62eb0..9bd9dc05accc9 100644
--- a/solution/1500-1599/1548.The Most Similar Path in a Graph/README.md	
+++ b/solution/1500-1599/1548.The Most Similar Path in a Graph/README.md	
@@ -14,13 +14,13 @@
 
 <p><strong>编辑距离</strong> 的定义如下：</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/edit.jpg" /></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/edit.jpg" /></p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e1.jpg" style="height: 300px; width: 213px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e1.jpg" style="height: 300px; width: 213px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 5, roads = [[0,2],[0,3],[1,2],[1,3],[1,4],[2,4]], names = ["ATL","PEK","LAX","DXB","HND"], targetPath = ["ATL","DXB","HND","LAX"]
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e2.jpg" style="height: 200px; width: 200px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e2.jpg" style="height: 200px; width: 200px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4, roads = [[1,0],[2,0],[3,0],[2,1],[3,1],[3,2]], names = ["ATL","PEK","LAX","DXB"], targetPath = ["ABC","DEF","GHI","JKL","MNO","PQR","STU","VWX"]
@@ -43,7 +43,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e3.jpg" style="height: 106px; width: 600px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e3.jpg" style="height: 106px; width: 600px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 6, roads = [[0,1],[1,2],[2,3],[3,4],[4,5]], names = ["ATL","PEK","LAX","ATL","DXB","HND"], targetPath = ["ATL","DXB","HND","DXB","ATL","LAX","PEK"]
diff --git a/solution/1500-1599/1548.The Most Similar Path in a Graph/README_EN.md b/solution/1500-1599/1548.The Most Similar Path in a Graph/README_EN.md
index abdfce64b9e07..d52501092f774 100644
--- a/solution/1500-1599/1548.The Most Similar Path in a Graph/README_EN.md	
+++ b/solution/1500-1599/1548.The Most Similar Path in a Graph/README_EN.md	
@@ -11,10 +11,10 @@
 <p>You need to return <em>the order of the nodes in the path with the minimum edit distance</em>. The&nbsp;path should be of the same length of <code>targetPath</code> and should be valid (i.e., there should be a direct road between <code>ans[i]</code> and <code>ans[i + 1]</code>). If there are multiple answers return any one of them.</p>
 
 <p>The <strong>edit distance</strong> is defined as follows:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/edit.jpg" style="width: 403px; height: 273px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/edit.jpg" style="width: 403px; height: 273px;" />
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e1.jpg" style="width: 213px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e1.jpg" style="width: 213px; height: 300px;" />
 <pre>
 <strong>Input:</strong> n = 5, roads = [[0,2],[0,3],[1,2],[1,3],[1,4],[2,4]], names = [&quot;ATL&quot;,&quot;PEK&quot;,&quot;LAX&quot;,&quot;DXB&quot;,&quot;HND&quot;], targetPath = [&quot;ATL&quot;,&quot;DXB&quot;,&quot;HND&quot;,&quot;LAX&quot;]
 <strong>Output:</strong> [0,2,4,2]
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e2.jpg" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e2.jpg" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> n = 4, roads = [[1,0],[2,0],[3,0],[2,1],[3,1],[3,2]], names = [&quot;ATL&quot;,&quot;PEK&quot;,&quot;LAX&quot;,&quot;DXB&quot;], targetPath = [&quot;ABC&quot;,&quot;DEF&quot;,&quot;GHI&quot;,&quot;JKL&quot;,&quot;MNO&quot;,&quot;PQR&quot;,&quot;STU&quot;,&quot;VWX&quot;]
 <strong>Output:</strong> [0,1,0,1,0,1,0,1]
@@ -34,7 +34,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e3.jpg" style="width: 600px; height: 106px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1548.The%20Most%20Similar%20Path%20in%20a%20Graph/images/e3.jpg" style="width: 600px; height: 106px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 6, roads = [[0,1],[1,2],[2,3],[3,4],[4,5]], names = [&quot;ATL&quot;,&quot;PEK&quot;,&quot;LAX&quot;,&quot;ATL&quot;,&quot;DXB&quot;,&quot;HND&quot;], targetPath = [&quot;ATL&quot;,&quot;DXB&quot;,&quot;HND&quot;,&quot;DXB&quot;,&quot;ATL&quot;,&quot;LAX&quot;,&quot;PEK&quot;]
diff --git a/solution/1500-1599/1552.Magnetic Force Between Two Balls/README.md b/solution/1500-1599/1552.Magnetic Force Between Two Balls/README.md
index 65f491684d384..e318a22689b07 100644
--- a/solution/1500-1599/1552.Magnetic Force Between Two Balls/README.md	
+++ b/solution/1500-1599/1552.Magnetic Force Between Two Balls/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1552.Magnetic%20Force%20Between%20Two%20Balls/images/q3v1.jpg" style="height: 195px; width: 562px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1552.Magnetic%20Force%20Between%20Two%20Balls/images/q3v1.jpg" style="height: 195px; width: 562px;"></p>
 
 <pre><strong>输入：</strong>position = [1,2,3,4,7], m = 3
 <strong>输出：</strong>3
diff --git a/solution/1500-1599/1552.Magnetic Force Between Two Balls/README_EN.md b/solution/1500-1599/1552.Magnetic Force Between Two Balls/README_EN.md
index c380aaf75f1e1..d2c1d9f779613 100644
--- a/solution/1500-1599/1552.Magnetic Force Between Two Balls/README_EN.md	
+++ b/solution/1500-1599/1552.Magnetic Force Between Two Balls/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1552.Magnetic%20Force%20Between%20Two%20Balls/images/q3v1.jpg" style="width: 562px; height: 195px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1552.Magnetic%20Force%20Between%20Two%20Balls/images/q3v1.jpg" style="width: 562px; height: 195px;" />
 <pre>
 <strong>Input:</strong> position = [1,2,3,4,7], m = 3
 <strong>Output:</strong> 3
diff --git a/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README.md b/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README.md
index 9e655e187a09f..800e88dd82b11 100644
--- a/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README.md	
+++ b/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/5480e1.png" style="height: 181px; width: 231px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/5480e1.png" style="height: 181px; width: 231px;"></p>
 
 <pre><strong>输入：</strong>n = 6, edges = [[0,1],[0,2],[2,5],[3,4],[4,2]]
 <strong>输出：</strong>[0,3]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/5480e2.png" style="height: 201px; width: 201px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/5480e2.png" style="height: 201px; width: 201px;"></p>
 
 <pre><strong>输入：</strong>n = 5, edges = [[0,1],[2,1],[3,1],[1,4],[2,4]]
 <strong>输出：</strong>[0,2,3]
diff --git a/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README_EN.md b/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README_EN.md
index 03bc1c6deee02..f723ed2ef5804 100644
--- a/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README_EN.md	
+++ b/solution/1500-1599/1557.Minimum Number of Vertices to Reach All Nodes/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/untitled22.png" style="width: 231px; height: 181px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/untitled22.png" style="width: 231px; height: 181px;" /></p>
 
 <pre>
 
@@ -26,7 +26,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/untitled.png" style="width: 201px; height: 201px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1557.Minimum%20Number%20of%20Vertices%20to%20Reach%20All%20Nodes/images/untitled.png" style="width: 201px; height: 201px;" /></p>
 
 <pre>
 
diff --git a/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README.md b/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README.md
index e7ffa55740625..e119b25c63777 100644
--- a/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README.md	
+++ b/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README.md	
@@ -6,7 +6,7 @@
 
 <!-- 这里写题目描述 -->
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1558.Minimum%20Numbers%20of%20Function%20Calls%20to%20Make%20Target%20Array/images/sample_2_1887.png" style="height:294px; width:573px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1558.Minimum%20Numbers%20of%20Function%20Calls%20to%20Make%20Target%20Array/images/sample_2_1887.png" style="height:294px; width:573px" /></p>
 
 <p>给你一个与 <code>nums</code>&nbsp;大小相同且初始值全为 0 的数组 <code>arr</code> ，请你调用以上函数得到整数数组 <code>nums</code>&nbsp;。</p>
 
diff --git a/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README_EN.md b/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README_EN.md
index 0ad9a44c0db30..006cc16f4eec8 100644
--- a/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README_EN.md	
+++ b/solution/1500-1599/1558.Minimum Numbers of Function Calls to Make Target Array/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>You are given an integer array <code>nums</code>. You have an integer array <code>arr</code> of the same length with all values set to <code>0</code> initially. You also have the following <code>modify</code> function:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1558.Minimum%20Numbers%20of%20Function%20Calls%20to%20Make%20Target%20Array/images/sample_2_1887.png" style="width: 573px; height: 294px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1558.Minimum%20Numbers%20of%20Function%20Calls%20to%20Make%20Target%20Array/images/sample_2_1887.png" style="width: 573px; height: 294px;" />
 <p>You want to use the modify function to covert <code>arr</code> to <code>nums</code> using the minimum number of calls.</p>
 
 <p>Return <em>the minimum number of function calls to make </em><code>nums</code><em> from </em><code>arr</code>.</p>
diff --git a/solution/1500-1599/1559.Detect Cycles in 2D Grid/README.md b/solution/1500-1599/1559.Detect Cycles in 2D Grid/README.md
index b89762dfaba9b..095ddc94d2306 100644
--- a/solution/1500-1599/1559.Detect Cycles in 2D Grid/README.md	
+++ b/solution/1500-1599/1559.Detect Cycles in 2D Grid/README.md	
@@ -18,27 +18,27 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e1.png" style="height: 152px; width: 231px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e1.png" style="height: 152px; width: 231px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[&quot;a&quot;,&quot;a&quot;,&quot;a&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;a&quot;,&quot;a&quot;,&quot;a&quot;]]
 <strong>输出：</strong>true
 <strong>解释：</strong>如下图所示，有 2 个用不同颜色标出来的环：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e11.png" style="height: 163px; width: 225px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e11.png" style="height: 163px; width: 225px;">
 </pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e2.png" style="height: 154px; width: 236px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e2.png" style="height: 154px; width: 236px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[&quot;c&quot;,&quot;c&quot;,&quot;c&quot;,&quot;a&quot;],[&quot;c&quot;,&quot;d&quot;,&quot;c&quot;,&quot;c&quot;],[&quot;c&quot;,&quot;c&quot;,&quot;e&quot;,&quot;c&quot;],[&quot;f&quot;,&quot;c&quot;,&quot;c&quot;,&quot;c&quot;]]
 <strong>输出：</strong>true
 <strong>解释：</strong>如下图所示，只有高亮所示的一个合法环：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e22.png" style="height: 157px; width: 229px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e22.png" style="height: 157px; width: 229px;">
 </pre>
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e3.png" style="height: 120px; width: 183px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/5482e3.png" style="height: 120px; width: 183px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;],[&quot;b&quot;,&quot;z&quot;,&quot;b&quot;],[&quot;b&quot;,&quot;b&quot;,&quot;a&quot;]]
 <strong>输出：</strong>false
diff --git a/solution/1500-1599/1559.Detect Cycles in 2D Grid/README_EN.md b/solution/1500-1599/1559.Detect Cycles in 2D Grid/README_EN.md
index 679de7b00389f..03fa9a04f2d63 100644
--- a/solution/1500-1599/1559.Detect Cycles in 2D Grid/README_EN.md	
+++ b/solution/1500-1599/1559.Detect Cycles in 2D Grid/README_EN.md	
@@ -15,29 +15,29 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/1.png" style="width: 231px; height: 152px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/1.png" style="width: 231px; height: 152px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[&quot;a&quot;,&quot;a&quot;,&quot;a&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;,&quot;a&quot;],[&quot;a&quot;,&quot;a&quot;,&quot;a&quot;,&quot;a&quot;]]
 <strong>Output:</strong> true
 <strong>Explanation: </strong>There are two valid cycles shown in different colors in the image below:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/11.png" style="width: 225px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/11.png" style="width: 225px; height: 163px;" />
 </pre>
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/22.png" style="width: 236px; height: 154px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/22.png" style="width: 236px; height: 154px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[&quot;c&quot;,&quot;c&quot;,&quot;c&quot;,&quot;a&quot;],[&quot;c&quot;,&quot;d&quot;,&quot;c&quot;,&quot;c&quot;],[&quot;c&quot;,&quot;c&quot;,&quot;e&quot;,&quot;c&quot;],[&quot;f&quot;,&quot;c&quot;,&quot;c&quot;,&quot;c&quot;]]
 <strong>Output:</strong> true
 <strong>Explanation: </strong>There is only one valid cycle highlighted in the image below:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/2.png" style="width: 229px; height: 157px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/2.png" style="width: 229px; height: 157px;" />
 </pre>
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/3.png" style="width: 183px; height: 120px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1559.Detect%20Cycles%20in%202D%20Grid/images/3.png" style="width: 183px; height: 120px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[&quot;a&quot;,&quot;b&quot;,&quot;b&quot;],[&quot;b&quot;,&quot;z&quot;,&quot;b&quot;],[&quot;b&quot;,&quot;b&quot;,&quot;a&quot;]]
diff --git a/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README.md b/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README.md
index 57b925cff56c3..e77e8b6bca19a 100644
--- a/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README.md	
+++ b/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1560.Most%20Visited%20Sector%20in%20%20a%20Circular%20Track/images/3rd45e.jpg" style="height: 341px; width: 433px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1560.Most%20Visited%20Sector%20in%20%20a%20Circular%20Track/images/3rd45e.jpg" style="height: 341px; width: 433px;"></p>
 
 <pre><strong>输入：</strong>n = 4, rounds = [1,3,1,2]
 <strong>输出：</strong>[1,2]
diff --git a/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README_EN.md b/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README_EN.md
index 5284a6b711bf3..72b073dce0b81 100644
--- a/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README_EN.md	
+++ b/solution/1500-1599/1560.Most Visited Sector in  a Circular Track/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1560.Most%20Visited%20Sector%20in%20%20a%20Circular%20Track/images/tmp.jpg" style="width: 433px; height: 341px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1560.Most%20Visited%20Sector%20in%20%20a%20Circular%20Track/images/tmp.jpg" style="width: 433px; height: 341px;" />
 <pre>
 <strong>Input:</strong> n = 4, rounds = [1,3,1,2]
 <strong>Output:</strong> [1,2]
diff --git a/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README.md b/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README.md
index 348f2372a0f8d..dea324eb55d10 100644
--- a/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README.md	
+++ b/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README.md	
@@ -23,25 +23,25 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/11.png" style="height: 242px; width: 400px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/11.png" style="height: 242px; width: 400px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>boxes = [4,3,4,1], warehouse = [5,3,3,4,1]
 <strong>输出：</strong>3
 <strong>解释：
-</strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/12.png" style="height: 242px; width: 280px;" />
+</strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/12.png" style="height: 242px; width: 280px;" />
 我们可以先把高度为 1 的箱子放入 4 号房间，然后再把高度为 3 的箱子放入 1 号、 2 号或 3 号房间，最后再把高度为 4 的箱子放入 0 号房间。
 我们不可能把所有 4 个箱子全部放进仓库里。</pre>
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/21.png" style="height: 202px; width: 400px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/21.png" style="height: 202px; width: 400px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>boxes = [1,2,2,3,4], warehouse = [3,4,1,2]
 <strong>输出：</strong>3
 <strong>解释：
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/22.png" style="height: 202px; width: 280px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/22.png" style="height: 202px; width: 280px;" />
 </strong>我们注意到，不可能把高度为 4 的箱子放入仓库中，因为它不能通过高度为 3 的房间。
 而且，对于最后两个房间 2 号和 3 号来说，只有高度为 1 的箱子可以放进去。
 我们最多可以放进 3 个箱子，如上图所示。黄色的箱子也可以放入 2 号房间。
diff --git a/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README_EN.md b/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README_EN.md
index e809bd00bf2da..61f02f0ad3189 100644
--- a/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README_EN.md	
+++ b/solution/1500-1599/1564.Put Boxes Into the Warehouse I/README_EN.md	
@@ -19,23 +19,23 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/11.png" style="width: 400px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/11.png" style="width: 400px; height: 242px;" />
 <pre>
 <strong>Input:</strong> boxes = [4,3,4,1], warehouse = [5,3,3,4,1]
 <strong>Output:</strong> 3
 <strong>Explanation:</strong> 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/12.png" style="width: 280px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/12.png" style="width: 280px; height: 242px;" />
 We can first put the box of height 1 in room 4. Then we can put the box of height 3 in either of the 3 rooms 1, 2, or 3. Lastly, we can put one box of height 4 in room 0.
 There is no way we can fit all 4 boxes in the warehouse.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/21.png" style="width: 400px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/21.png" style="width: 400px; height: 202px;" />
 <pre>
 <strong>Input:</strong> boxes = [1,2,2,3,4], warehouse = [3,4,1,2]
 <strong>Output:</strong> 3
 <strong>Explanation:</strong> 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/22.png" style="width: 280px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1564.Put%20Boxes%20Into%20the%20Warehouse%20I/images/22.png" style="width: 280px; height: 202px;" />
 Notice that it&#39;s not possible to put the box of height 4 into the warehouse since it cannot pass the first room of height 3.
 Also, for the last two rooms, 2 and 3, only boxes of height 1 can fit.
 We can fit 3 boxes maximum as shown above. The yellow box can also be put in room 2 instead.
diff --git a/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README.md b/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README.md
index 84dbaf4c6a2d0..db509cba0c004 100644
--- a/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README.md	
+++ b/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/1926_island.png" style="height: 139px; width: 498px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/1926_island.png" style="height: 139px; width: 498px;"></strong></p>
 
 <pre><strong>输入：</strong>grid = [[0,1,1,0],[0,1,1,0],[0,0,0,0]]
 <strong>输出：</strong>2
diff --git a/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README_EN.md b/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README_EN.md
index 2c4e8a3b4323e..f7b66a16e985b 100644
--- a/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README_EN.md	
+++ b/solution/1500-1599/1568.Minimum Number of Days to Disconnect Island/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/land1.jpg" style="width: 500px; height: 169px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/land1.jpg" style="width: 500px; height: 169px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,1,0],[0,1,1,0],[0,0,0,0]]
 
@@ -25,7 +25,7 @@ Change land grid[1][1] and grid[0][2] to water and get 2 disconnected island.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/land2.jpg" style="width: 404px; height: 85px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1568.Minimum%20Number%20of%20Days%20to%20Disconnect%20Island/images/land2.jpg" style="width: 404px; height: 85px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1]]
 <strong>Output:</strong> 2
diff --git a/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README.md b/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README.md
index a7d08f949a9ab..4ba98c7c62127 100644
--- a/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README.md	
+++ b/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/bb.png" style="height: 101px; width: 121px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/bb.png" style="height: 101px; width: 121px;"></p>
 
 <pre><strong>输入：</strong>nums = [2,1,3]
 <strong>输出：</strong>1
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex1.png" style="height: 161px; width: 241px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex1.png" style="height: 161px; width: 241px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [3,4,5,1,2]
 <strong>输出：</strong>5
@@ -41,7 +41,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex4.png" style="height: 161px; width: 121px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex4.png" style="height: 161px; width: 121px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [1,2,3]
 <strong>输出：</strong>0
@@ -50,7 +50,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/abc.png" style="height: 161px; width: 241px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/abc.png" style="height: 161px; width: 241px;"></strong></p>
 
 <pre><strong>输入：</strong>nums = [3,1,2,5,4,6]
 <strong>输出：</strong>19
diff --git a/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README_EN.md b/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README_EN.md
index c0e7dfbbf0798..3a4674483a084 100644
--- a/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README_EN.md	
+++ b/solution/1500-1599/1569.Number of Ways to Reorder Array to Get Same BST/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/bb.png" style="width: 121px; height: 101px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/bb.png" style="width: 121px; height: 101px;" />
 <pre>
 <strong>Input:</strong> nums = [2,1,3]
 <strong>Output:</strong> 1
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex1.png" style="width: 241px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex1.png" style="width: 241px; height: 161px;" />
 <pre>
 <strong>Input:</strong> nums = [3,4,5,1,2]
 <strong>Output:</strong> 5
@@ -37,7 +37,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex4.png" style="width: 121px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1569.Number%20of%20Ways%20to%20Reorder%20Array%20to%20Get%20Same%20BST/images/ex4.png" style="width: 121px; height: 161px;" />
 <pre>
 <strong>Input:</strong> nums = [1,2,3]
 <strong>Output:</strong> 0
diff --git a/solution/1500-1599/1572.Matrix Diagonal Sum/README.md b/solution/1500-1599/1572.Matrix Diagonal Sum/README.md
index 80f5d4070d12b..801336dff30e6 100644
--- a/solution/1500-1599/1572.Matrix Diagonal Sum/README.md	
+++ b/solution/1500-1599/1572.Matrix Diagonal Sum/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例&nbsp; 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1572.Matrix%20Diagonal%20Sum/images/sample_1911.png" style="height:174px; width:336px" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1572.Matrix%20Diagonal%20Sum/images/sample_1911.png" style="height:174px; width:336px" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[<strong>1</strong>,2,<strong>3</strong>],
diff --git a/solution/1500-1599/1572.Matrix Diagonal Sum/README_EN.md b/solution/1500-1599/1572.Matrix Diagonal Sum/README_EN.md
index 312e666ec2daa..9f015a9266241 100644
--- a/solution/1500-1599/1572.Matrix Diagonal Sum/README_EN.md	
+++ b/solution/1500-1599/1572.Matrix Diagonal Sum/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1572.Matrix%20Diagonal%20Sum/images/sample_1911.png" style="width: 336px; height: 174px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1572.Matrix%20Diagonal%20Sum/images/sample_1911.png" style="width: 336px; height: 174px;" />
 <pre>
 <strong>Input:</strong> mat = [[<strong>1</strong>,2,<strong>3</strong>],
 &nbsp;             [4,<strong>5</strong>,6],
diff --git a/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README.md b/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README.md
index af82248a12636..641d321a007d9 100644
--- a/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README.md	
+++ b/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/ballon1.jpg" style="width: 404px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/ballon1.jpg" style="width: 404px; height: 243px;" />
 <pre>
 <strong>输入：</strong>colors = "abaac", neededTime = [1,2,3,4,5]
 <strong>输出：</strong>3
@@ -24,7 +24,7 @@ Bob 可以移除下标 2 的蓝色气球。这将花费 3 秒。
 移除后，不存在两个连续的气球涂着相同的颜色。总时间 = 3 。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon2.jpg" style="width: 244px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon2.jpg" style="width: 244px; height: 243px;" />
 <pre>
 <strong>输入：</strong>colors = "abc", neededTime = [1,2,3]
 <strong>输出：</strong>0
@@ -32,7 +32,7 @@ Bob 可以移除下标 2 的蓝色气球。这将花费 3 秒。
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon3.jpg" style="width: 404px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon3.jpg" style="width: 404px; height: 243px;" />
 <pre>
 <strong>输入：</strong>colors = "aabaa", neededTime = [1,2,3,4,1]
 <strong>输出：</strong>2
diff --git a/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README_EN.md b/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README_EN.md
index 02f6e953c46af..1eacec030bb6a 100644
--- a/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README_EN.md	
+++ b/solution/1500-1599/1578.Minimum Time to Make Rope Colorful/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/ballon1.jpg" style="width: 404px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/ballon1.jpg" style="width: 404px; height: 243px;" />
 <pre>
 <strong>Input:</strong> colors = &quot;abaac&quot;, neededTime = [1,2,3,4,5]
 <strong>Output:</strong> 3
@@ -21,7 +21,7 @@ Bob can remove the blue balloon at index 2. This takes 3 seconds.
 There are no longer two consecutive balloons of the same color. Total time = 3.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon2.jpg" style="width: 244px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon2.jpg" style="width: 244px; height: 243px;" />
 <pre>
 <strong>Input:</strong> colors = &quot;abc&quot;, neededTime = [1,2,3]
 <strong>Output:</strong> 0
@@ -29,7 +29,7 @@ There are no longer two consecutive balloons of the same color. Total time = 3.<
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon3.jpg" style="width: 404px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1578.Minimum%20Time%20to%20Make%20Rope%20Colorful/images/balloon3.jpg" style="width: 404px; height: 243px;" />
 <pre>
 <strong>Input:</strong> colors = &quot;aabaa&quot;, neededTime = [1,2,3,4,1]
 <strong>Output:</strong> 2
diff --git a/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README.md b/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README.md
index 39857f245ba10..ac4069c47dd2d 100644
--- a/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README.md	
+++ b/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex1.png" style="height: 191px; width: 179px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex1.png" style="height: 191px; width: 179px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, edges = [[3,1,2],[3,2,3],[1,1,3],[1,2,4],[1,1,2],[2,3,4]]
 <strong>输出：</strong>2
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex2.png" style="height: 190px; width: 178px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex2.png" style="height: 190px; width: 178px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, edges = [[3,1,2],[3,2,3],[1,1,4],[2,1,4]]
 <strong>输出：</strong>0
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex3.png" style="height: 190px; width: 178px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/5510ex3.png" style="height: 190px; width: 178px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 4, edges = [[3,2,3],[1,1,2],[2,3,4]]
 <strong>输出：</strong>-1
diff --git a/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README_EN.md b/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README_EN.md
index 47f9691673526..b4e3a7f681a10 100644
--- a/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README_EN.md	
+++ b/solution/1500-1599/1579.Remove Max Number of Edges to Keep Graph Fully Traversable/README_EN.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex1.png" style="width: 179px; height: 191px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex1.png" style="width: 179px; height: 191px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 4, edges = [[3,1,2],[3,2,3],[1,1,3],[1,2,4],[1,1,2],[2,3,4]]
@@ -29,7 +29,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex2.png" style="width: 178px; height: 190px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex2.png" style="width: 178px; height: 190px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 4, edges = [[3,1,2],[3,2,3],[1,1,4],[2,1,4]]
@@ -39,7 +39,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex3.png" style="width: 178px; height: 190px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1579.Remove%20Max%20Number%20of%20Edges%20to%20Keep%20Graph%20Fully%20Traversable/images/ex3.png" style="width: 178px; height: 190px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 4, edges = [[3,2,3],[1,1,2],[2,3,4]]
diff --git a/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README.md b/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README.md
index fdeda752bedc6..2c4bc9b818cb4 100644
--- a/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README.md	
+++ b/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README.md	
@@ -22,12 +22,12 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22.png" style="width: 401px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22.png" style="width: 401px; height: 202px;" />
 <pre>
 <strong>输入:</strong> boxes = [1,2,2,3,4], warehouse = [3,4,1,2]
 <strong>输出:</strong> 4
 <strong>解释:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-1.png" style="width: 240px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-1.png" style="width: 240px; height: 202px;" />
 </strong>我们可以按如下顺序推入箱子:
 1- 从左边或右边把黄色箱子推入2号房间；
 2- 从右边把橙色箱子推入3号房间；
@@ -37,12 +37,12 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-2.png" style="width: 401px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-2.png" style="width: 401px; height: 242px;" />
 <pre>
 <strong>输入:</strong> boxes = [3,5,5,2], warehouse = [2,1,3,4,5]
 <strong>输出:</strong> 3
 <strong>解释:
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-3.png" style="width: 280px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-3.png" style="width: 280px; height: 242px;" />
 </strong>因为只有一个高度大于等于5的房间，所以无法将两个高度为5的箱子都推入仓库。
 还有其他方式推入箱子，比如将绿色箱子推入2号房间，或者在绿色及红色箱子之前将橙色箱子推入2号房间。
 </pre>
diff --git a/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README_EN.md b/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README_EN.md
index f255fab351757..bf092357a409d 100644
--- a/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README_EN.md	
+++ b/solution/1500-1599/1580.Put Boxes Into the Warehouse II/README_EN.md	
@@ -19,12 +19,12 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22.png" style="width: 401px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22.png" style="width: 401px; height: 202px;" />
 <pre>
 <strong>Input:</strong> boxes = [1,2,2,3,4], warehouse = [3,4,1,2]
 <strong>Output:</strong> 4
 <strong>Explanation:</strong>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-1.png" style="width: 240px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-1.png" style="width: 240px; height: 202px;" />
 We can store the boxes in the following order:
 1- Put the yellow box in room 2 from either the left or right side.
 2- Put the orange box in room 3 from the right side.
@@ -34,12 +34,12 @@ Notice that there are other valid ways to put 4 boxes such as swapping the red a
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-2.png" style="width: 401px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-2.png" style="width: 401px; height: 242px;" />
 <pre>
 <strong>Input:</strong> boxes = [3,5,5,2], warehouse = [2,1,3,4,5]
 <strong>Output:</strong> 3
 <strong>Explanation:</strong>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-3.png" style="width: 280px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1580.Put%20Boxes%20Into%20the%20Warehouse%20II/images/22-3.png" style="width: 280px; height: 242px;" />
 It is not possible to put the two boxes of height 5 in the warehouse since there&#39;s only 1 room of height &gt;= 5.
 Other valid solutions are to put the green box in room 2 or to put the orange box first in room 2 before putting the green and red boxes.
 </pre>
diff --git a/solution/1500-1599/1582.Special Positions in a Binary Matrix/README_EN.md b/solution/1500-1599/1582.Special Positions in a Binary Matrix/README_EN.md
index 2b7b69db03e86..ea725de10d9c6 100644
--- a/solution/1500-1599/1582.Special Positions in a Binary Matrix/README_EN.md	
+++ b/solution/1500-1599/1582.Special Positions in a Binary Matrix/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1582.Special%20Positions%20in%20a%20Binary%20Matrix/images/special1.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1582.Special%20Positions%20in%20a%20Binary%20Matrix/images/special1.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,0,0],[0,0,1],[1,0,0]]
 <strong>Output:</strong> 1
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1582.Special%20Positions%20in%20a%20Binary%20Matrix/images/special-grid.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1582.Special%20Positions%20in%20a%20Binary%20Matrix/images/special-grid.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,0,0],[0,1,0],[0,0,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1500-1599/1584.Min Cost to Connect All Points/README.md b/solution/1500-1599/1584.Min Cost to Connect All Points/README.md
index e8f855abdb2b1..7053494b5e862 100644
--- a/solution/1500-1599/1584.Min Cost to Connect All Points/README.md	
+++ b/solution/1500-1599/1584.Min Cost to Connect All Points/README.md	
@@ -16,13 +16,13 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/d.png" style="height:268px; width:214px; background:#e5e5e5" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/d.png" style="height:268px; width:214px; background:#e5e5e5" /></p>
 
 <pre>
 <strong>输入：</strong>points = [[0,0],[2,2],[3,10],[5,2],[7,0]]
 <strong>输出：</strong>20
 <strong>解释：
-</strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/c.png" style="height:268px; width:214px; background:#e5e5e5" />
+</strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/c.png" style="height:268px; width:214px; background:#e5e5e5" />
 我们可以按照上图所示连接所有点得到最小总费用，总费用为 20 。
 注意到任意两个点之间只有唯一一条路径互相到达。
 </pre>
diff --git a/solution/1500-1599/1584.Min Cost to Connect All Points/README_EN.md b/solution/1500-1599/1584.Min Cost to Connect All Points/README_EN.md
index 3340cf08e92dc..38ae2384dc1cd 100644
--- a/solution/1500-1599/1584.Min Cost to Connect All Points/README_EN.md	
+++ b/solution/1500-1599/1584.Min Cost to Connect All Points/README_EN.md	
@@ -12,12 +12,12 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/d.png" style="width: 214px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/d.png" style="width: 214px; height: 268px;" />
 <pre>
 <strong>Input:</strong> points = [[0,0],[2,2],[3,10],[5,2],[7,0]]
 <strong>Output:</strong> 20
 <strong>Explanation:</strong> 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/c.png" style="width: 214px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1584.Min%20Cost%20to%20Connect%20All%20Points/images/c.png" style="width: 214px; height: 268px;" />
 We can connect the points as shown above to get the minimum cost of 20.
 Notice that there is a unique path between every pair of points.
 </pre>
diff --git a/solution/1500-1599/1586.Binary Search Tree Iterator II/README.md b/solution/1500-1599/1586.Binary Search Tree Iterator II/README.md
index 2204bc8747f01..1c6a939c769ad 100644
--- a/solution/1500-1599/1586.Binary Search Tree Iterator II/README.md	
+++ b/solution/1500-1599/1586.Binary Search Tree Iterator II/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1586.Binary%20Search%20Tree%20Iterator%20II/images/untitled-diagram-1.png" style="height: 201px; width: 201px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1586.Binary%20Search%20Tree%20Iterator%20II/images/untitled-diagram-1.png" style="height: 201px; width: 201px;"></strong></p>
 
 <pre><strong>输入</strong>
 [&quot;BSTIterator&quot;, &quot;next&quot;, &quot;next&quot;, &quot;prev&quot;, &quot;next&quot;, &quot;hasNext&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;, &quot;hasNext&quot;, &quot;hasPrev&quot;, &quot;prev&quot;, &quot;prev&quot;]
diff --git a/solution/1500-1599/1586.Binary Search Tree Iterator II/README_EN.md b/solution/1500-1599/1586.Binary Search Tree Iterator II/README_EN.md
index 123f84704ac51..1404612596250 100644
--- a/solution/1500-1599/1586.Binary Search Tree Iterator II/README_EN.md	
+++ b/solution/1500-1599/1586.Binary Search Tree Iterator II/README_EN.md	
@@ -21,7 +21,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1586.Binary%20Search%20Tree%20Iterator%20II/images/untitled-diagram-1.png" style="width: 201px; height: 201px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1586.Binary%20Search%20Tree%20Iterator%20II/images/untitled-diagram-1.png" style="width: 201px; height: 201px;" /></strong></p>
 
 <pre>
 <strong>Input</strong>
diff --git a/solution/1500-1599/1591.Strange Printer II/README.md b/solution/1500-1599/1591.Strange Printer II/README.md
index 7777be8cdcae7..e6989ed62a3d3 100644
--- a/solution/1500-1599/1591.Strange Printer II/README.md	
+++ b/solution/1500-1599/1591.Strange Printer II/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/sample_1_1929.png" style="height: 138px; width: 483px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/sample_1_1929.png" style="height: 138px; width: 483px;"></p>
 
 <pre><strong>输入：</strong>targetGrid = [[1,1,1,1],[1,2,2,1],[1,2,2,1],[1,1,1,1]]
 <strong>输出：</strong>true
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/sample_2_1929.png" style="height: 290px; width: 483px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/sample_2_1929.png" style="height: 290px; width: 483px;"></p>
 
 <pre><strong>输入：</strong>targetGrid = [[1,1,1,1],[1,1,3,3],[1,1,3,4],[5,5,1,4]]
 <strong>输出：</strong>true
diff --git a/solution/1500-1599/1591.Strange Printer II/README_EN.md b/solution/1500-1599/1591.Strange Printer II/README_EN.md
index 6d6ae0900b7d3..c0ed87f5e93f0 100644
--- a/solution/1500-1599/1591.Strange Printer II/README_EN.md	
+++ b/solution/1500-1599/1591.Strange Printer II/README_EN.md	
@@ -17,14 +17,14 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/print1.jpg" style="width: 600px; height: 175px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/print1.jpg" style="width: 600px; height: 175px;" />
 <pre>
 <strong>Input:</strong> targetGrid = [[1,1,1,1],[1,2,2,1],[1,2,2,1],[1,1,1,1]]
 <strong>Output:</strong> true
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/print2.jpg" style="width: 600px; height: 367px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1591.Strange%20Printer%20II/images/print2.jpg" style="width: 600px; height: 367px;" />
 <pre>
 <strong>Input:</strong> targetGrid = [[1,1,1,1],[1,1,3,3],[1,1,3,4],[5,5,1,4]]
 <strong>Output:</strong> true
diff --git a/solution/1500-1599/1594.Maximum Non Negative Product in a Matrix/README_EN.md b/solution/1500-1599/1594.Maximum Non Negative Product in a Matrix/README_EN.md
index d22b74dfe1197..1855c24ed1b2f 100644
--- a/solution/1500-1599/1594.Maximum Non Negative Product in a Matrix/README_EN.md	
+++ b/solution/1500-1599/1594.Maximum Non Negative Product in a Matrix/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product1.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product1.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[-1,-2,-3],[-2,-3,-3],[-3,-3,-2]]
 <strong>Output:</strong> -1
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product2.jpg" style="width: 244px; height: 245px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product2.jpg" style="width: 244px; height: 245px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,-2,1],[1,-2,1],[3,-4,1]]
 <strong>Output:</strong> 8
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product3.jpg" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1594.Maximum%20Non%20Negative%20Product%20in%20a%20Matrix/images/product3.jpg" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,3],[0,-4]]
 <strong>Output:</strong> 0
diff --git a/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README.md b/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README.md
index d875dbaa5b096..c5d3f54e33379 100644
--- a/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README.md	
+++ b/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex1.jpg" style="height: 243px; width: 322px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex1.jpg" style="height: 243px; width: 322px;"></p>
 
 <pre><strong>输入：</strong>cost = [[15, 96], [36, 2]]
 <strong>输出：</strong>17
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex2.jpg" style="height: 403px; width: 322px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex2.jpg" style="height: 403px; width: 322px;"></p>
 
 <pre><strong>输入：</strong>cost = [[1, 3, 5], [4, 1, 1], [1, 5, 3]]
 <strong>输出：</strong>4
diff --git a/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README_EN.md b/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README_EN.md
index 787ad5bd2ddc3..5acc271ce9e4c 100644
--- a/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README_EN.md	
+++ b/solution/1500-1599/1595.Minimum Cost to Connect Two Groups of Points/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex1.jpg" style="width: 322px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex1.jpg" style="width: 322px; height: 243px;" />
 <pre>
 <strong>Input:</strong> cost = [[15, 96], [36, 2]]
 <strong>Output:</strong> 17
@@ -23,7 +23,7 @@ This results in a total cost of 17.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex2.jpg" style="width: 322px; height: 403px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1595.Minimum%20Cost%20to%20Connect%20Two%20Groups%20of%20Points/images/ex2.jpg" style="width: 322px; height: 403px;" />
 <pre>
 <strong>Input:</strong> cost = [[1, 3, 5], [4, 1, 1], [1, 5, 3]]
 <strong>Output:</strong> 4
diff --git a/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README.md b/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README.md
index abfd2240e32f7..e0d2e14e98a49 100644
--- a/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README.md	
+++ b/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README.md	
@@ -21,7 +21,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-4.png" style="width: 250px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-4.png" style="width: 250px; height: 161px;" />
 <pre>
 <strong>输入：</strong>s = "3*4-2*5"
 <strong>输出：</strong>[-,*,*,3,4,2,5]
@@ -29,15 +29,15 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-2.png" style="width: 150px; height: 210px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-2.png" style="width: 150px; height: 210px;" />
 <pre>
 <strong>输入：</strong>s = "2-3/(5*2)+1"
 <strong>输出：</strong>[+,-,1,2,/,null,null,null,null,3,*,null,null,5,2]
 <strong>解释：</strong>上面的树的中序遍历为 2-3/5*2+1 ，与 s 消除括号后相同。该树还会生成正确的结果，其操作数的顺序与 s 中出现的顺序相同。
 下面的树也是一个有效的二叉表达式树，具有与 s 相同的中序遍历，但它不是一个有效的答案，因为它的求值结果不同。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-1.png" style="width: 201px; height: 281px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-1.png" style="width: 201px; height: 281px;" />
 下面的树也是无效的。尽管它的计算结果相等并与上述树等效，但其中序遍历不会产生 s ，并且其操作数与 s 中的顺序也不相同。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-3.png" style="width: 281px; height: 281px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-3.png" style="width: 281px; height: 281px;" />
 </pre>
 
 <p><strong>示例 3：</strong></p>
diff --git a/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README_EN.md b/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README_EN.md
index c749546fc719f..d0dc85bce074b 100644
--- a/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README_EN.md	
+++ b/solution/1500-1599/1597.Build Binary Expression Tree From Infix Expression/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-4.png" style="width: 250px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-4.png" style="width: 250px; height: 161px;" />
 <pre>
 <strong>Input:</strong> s = &quot;3*4-2*5&quot;
 <strong>Output:</strong> [-,*,*,3,4,2,5]
@@ -26,15 +26,15 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-2.png" style="width: 150px; height: 210px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-2.png" style="width: 150px; height: 210px;" />
 <pre>
 <strong>Input:</strong> s = &quot;2-3/(5*2)+1&quot;
 <strong>Output:</strong> [+,-,1,2,/,null,null,null,null,3,*,null,null,5,2]
 <strong>Explanation:</strong> The inorder traversal of the tree above is 2-3/5*2+1 which is the same as s without the parenthesis. The tree also produces the correct result and its operands are in the same order as they appear in s.
 The tree below is also a valid binary expression tree with the same inorder traversal as s, but it not a valid answer because it does not evaluate to the same value.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-1.png" style="width: 201px; height: 281px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-1.png" style="width: 201px; height: 281px;" />
 The third tree below is also not valid. Although it produces the same result and is equivalent to the above trees, its inorder traversal does not produce s and its operands are not in the same order as s.
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-3.png" style="width: 281px; height: 281px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1597.Build%20Binary%20Expression%20Tree%20From%20Infix%20Expression/images/ex1-3.png" style="width: 281px; height: 281px;" />
 </pre>
 
 <p><strong>Example 3:</strong></p>
diff --git a/solution/1500-1599/1598.Crawler Log Folder/README.md b/solution/1500-1599/1598.Crawler Log Folder/README.md
index c373731071de4..bdec6aeb0de15 100644
--- a/solution/1500-1599/1598.Crawler Log Folder/README.md	
+++ b/solution/1500-1599/1598.Crawler Log Folder/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_11_1957.png" style="height: 151px; width: 775px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_11_1957.png" style="height: 151px; width: 775px;"></p>
 
 <pre><strong>输入：</strong>logs = [&quot;d1/&quot;,&quot;d2/&quot;,&quot;../&quot;,&quot;d21/&quot;,&quot;./&quot;]
 <strong>输出：</strong>2
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_22_1957.png" style="height: 270px; width: 600px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_22_1957.png" style="height: 270px; width: 600px;"></p>
 
 <pre><strong>输入：</strong>logs = [&quot;d1/&quot;,&quot;d2/&quot;,&quot;./&quot;,&quot;d3/&quot;,&quot;../&quot;,&quot;d31/&quot;]
 <strong>输出：</strong>3
diff --git a/solution/1500-1599/1598.Crawler Log Folder/README_EN.md b/solution/1500-1599/1598.Crawler Log Folder/README_EN.md
index 6dcac107f27d9..ff1aa585f2c78 100644
--- a/solution/1500-1599/1598.Crawler Log Folder/README_EN.md	
+++ b/solution/1500-1599/1598.Crawler Log Folder/README_EN.md	
@@ -23,7 +23,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_11_1957.png" style="width: 775px; height: 151px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_11_1957.png" style="width: 775px; height: 151px;" /></p>
 
 <pre>
 <strong>Input:</strong> logs = [&quot;d1/&quot;,&quot;d2/&quot;,&quot;../&quot;,&quot;d21/&quot;,&quot;./&quot;]
@@ -33,7 +33,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_22_1957.png" style="width: 600px; height: 270px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1598.Crawler%20Log%20Folder/images/sample_22_1957.png" style="width: 600px; height: 270px;" /></p>
 
 <pre>
 <strong>Input:</strong> logs = [&quot;d1/&quot;,&quot;d2/&quot;,&quot;./&quot;,&quot;d3/&quot;,&quot;../&quot;,&quot;d31/&quot;]
diff --git a/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README.md b/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README.md
index 9493b24d0017e..ddb18bfb812d8 100644
--- a/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README.md	
+++ b/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1599.Maximum%20Profit%20of%20Operating%20a%20Centennial%20Wheel/images/wheeldiagram12.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1599.Maximum%20Profit%20of%20Operating%20a%20Centennial%20Wheel/images/wheeldiagram12.png" /></p>
 
 <pre>
 <strong>输入：</strong>customers = [8,3], boardingCost = 5, runningCost = 6
diff --git a/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README_EN.md b/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README_EN.md
index 28e91d3c69493..c071ea3d54651 100644
--- a/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README_EN.md	
+++ b/solution/1500-1599/1599.Maximum Profit of Operating a Centennial Wheel/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1599.Maximum%20Profit%20of%20Operating%20a%20Centennial%20Wheel/images/wheeldiagram12.png" style="width: 700px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1500-1599/1599.Maximum%20Profit%20of%20Operating%20a%20Centennial%20Wheel/images/wheeldiagram12.png" style="width: 700px; height: 225px;" />
 <pre>
 <strong>Input:</strong> customers = [8,3], boardingCost = 5, runningCost = 6
 <strong>Output:</strong> 3
diff --git a/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README.md b/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README.md
index 07d6a69ffd041..1c97cddd9de97 100644
--- a/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README.md	
+++ b/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move1.jpg" style="height: 406px; width: 600px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move1.jpg" style="height: 406px; width: 600px;"></p>
 
 <pre><strong>输入：</strong>n = 5, requests = [[0,1],[1,0],[0,1],[1,2],[2,0],[3,4]]
 <strong>输出：</strong>5
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move2.jpg" style="height: 327px; width: 450px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move2.jpg" style="height: 327px; width: 450px;"></p>
 
 <pre><strong>输入：</strong>n = 3, requests = [[0,0],[1,2],[2,1]]
 <strong>输出：</strong>3
diff --git a/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README_EN.md b/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README_EN.md
index a57febdeb5b3d..d988156d12b96 100644
--- a/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README_EN.md	
+++ b/solution/1600-1699/1601.Maximum Number of Achievable Transfer Requests/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move1.jpg" style="width: 600px; height: 406px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move1.jpg" style="width: 600px; height: 406px;" />
 <pre>
 <strong>Input:</strong> n = 5, requests = [[0,1],[1,0],[0,1],[1,2],[2,0],[3,4]]
 <strong>Output:</strong> 5
@@ -29,7 +29,7 @@ We can achieve the requests of users y, a and z by swapping the places in the 3
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move2.jpg" style="width: 450px; height: 327px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1601.Maximum%20Number%20of%20Achievable%20Transfer%20Requests/images/move2.jpg" style="width: 450px; height: 327px;" />
 <pre>
 <strong>Input:</strong> n = 3, requests = [[0,0],[1,2],[2,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README.md b/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README.md
index de997ffb3a7df..8b2160e00aaa9 100644
--- a/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README.md	
+++ b/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README.md	
@@ -12,7 +12,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p3.png" style="width: 241px; height: 161px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p3.png" style="width: 241px; height: 161px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [1,2,3,null,4,5,6], u = 4
@@ -22,7 +22,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p2.png" style="width: 101px; height: 161px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p2.png" style="width: 101px; height: 161px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [3,null,4,2], u = 2
diff --git a/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README_EN.md b/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README_EN.md
index cd61078c422d4..5af0d954be175 100644
--- a/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README_EN.md	
+++ b/solution/1600-1699/1602.Find Nearest Right Node in Binary Tree/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p3.png" style="width: 241px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p3.png" style="width: 241px; height: 161px;" />
 <pre>
 <strong>Input:</strong> root = [1,2,3,null,4,5,6], u = 4
 <strong>Output:</strong> 5
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p2.png" style="width: 101px; height: 161px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1602.Find%20Nearest%20Right%20Node%20in%20Binary%20Tree/images/p2.png" style="width: 101px; height: 161px;" />
 <pre>
 <strong>Input:</strong> root = [3,null,4,2], u = 2
 <strong>Output:</strong> null
diff --git a/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README.md b/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README.md
index 6ed8cde4ae2e3..c11c609ee8481 100644
--- a/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README.md	
+++ b/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1606.Find%20Servers%20That%20Handled%20Most%20Number%20of%20Requests/images/load-1.png" style="height: 221px; width: 389px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1606.Find%20Servers%20That%20Handled%20Most%20Number%20of%20Requests/images/load-1.png" style="height: 221px; width: 389px;" /></p>
 
 <pre>
 <strong>输入：</strong>k = 3, arrival = [1,2,3,4,5], load = [5,2,3,3,3] 
diff --git a/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README_EN.md b/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README_EN.md
index c67831185e8b3..4938cc66fc5c1 100644
--- a/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README_EN.md	
+++ b/solution/1600-1699/1606.Find Servers That Handled Most Number of Requests/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1606.Find%20Servers%20That%20Handled%20Most%20Number%20of%20Requests/images/load-1.png" style="width: 389px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1606.Find%20Servers%20That%20Handled%20Most%20Number%20of%20Requests/images/load-1.png" style="width: 389px; height: 221px;" />
 <pre>
 <strong>Input:</strong> k = 3, arrival = [1,2,3,4,5], load = [5,2,3,3,3] 
 <strong>Output:</strong> [1] 
diff --git a/solution/1600-1699/1609.Even Odd Tree/README.md b/solution/1600-1699/1609.Even Odd Tree/README.md
index ec9471197177a..326b1c1c55a16 100644
--- a/solution/1600-1699/1609.Even Odd Tree/README.md	
+++ b/solution/1600-1699/1609.Even Odd Tree/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_1966.png" style="height: 229px; width: 362px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_1966.png" style="height: 229px; width: 362px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [1,10,4,3,null,7,9,12,8,6,null,null,2]
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_2_1966.png" style="height: 167px; width: 363px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_2_1966.png" style="height: 167px; width: 363px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>root = [5,4,2,3,3,7]
@@ -49,7 +49,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_333_1966.png" style="height: 167px; width: 363px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_333_1966.png" style="height: 167px; width: 363px;" /></p>
 
 <pre>
 <strong>输入：</strong>root = [5,9,1,3,5,7]
diff --git a/solution/1600-1699/1609.Even Odd Tree/README_EN.md b/solution/1600-1699/1609.Even Odd Tree/README_EN.md
index edf6d294ff885..44b8a6ad708a7 100644
--- a/solution/1600-1699/1609.Even Odd Tree/README_EN.md	
+++ b/solution/1600-1699/1609.Even Odd Tree/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_1966.png" style="width: 362px; height: 229px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_1966.png" style="width: 362px; height: 229px;" />
 <pre>
 <strong>Input:</strong> root = [1,10,4,3,null,7,9,12,8,6,null,null,2]
 <strong>Output:</strong> true
@@ -29,7 +29,7 @@ Since levels 0 and 2 are all odd and increasing and levels 1 and 3 are all even
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_2_1966.png" style="width: 363px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_2_1966.png" style="width: 363px; height: 167px;" />
 <pre>
 <strong>Input:</strong> root = [5,4,2,3,3,7]
 <strong>Output:</strong> false
@@ -41,7 +41,7 @@ Node values in level 2 must be in strictly increasing order, so the tree is not
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_333_1966.png" style="width: 363px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1609.Even%20Odd%20Tree/images/sample_1_333_1966.png" style="width: 363px; height: 167px;" />
 <pre>
 <strong>Input:</strong> root = [5,9,1,3,5,7]
 <strong>Output:</strong> false
diff --git a/solution/1600-1699/1610.Maximum Number of Visible Points/README.md b/solution/1600-1699/1610.Maximum Number of Visible Points/README.md
index 54bff5eb4eef5..9d4fbf7ae3962 100644
--- a/solution/1600-1699/1610.Maximum Number of Visible Points/README.md	
+++ b/solution/1600-1699/1610.Maximum Number of Visible Points/README.md	
@@ -10,7 +10,7 @@
 
 <p>最开始，你面向东方进行观测。你 <strong>不能</strong> 进行移动改变位置，但可以通过 <strong>自转</strong> 调整观测角度。换句话说，<code>pos<sub>x</sub></code> 和 <code>pos<sub>y</sub></code> 不能改变。你的视野范围的角度用 <code>angle</code> 表示， 这决定了你观测任意方向时可以多宽。设 <code>d</code> 为你逆时针自转旋转的度数，那么你的视野就是角度范围 <code>[d - angle/2, d + angle/2]</code> 所指示的那片区域。</p>
 
-<video autoplay="" controls="" height="360" muted="" style="max-width:100%;height:auto;" width="750"><source src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/angle.mp4" type="video/mp4" />Your browser does not support the video tag or this video format.</video>
+<video autoplay="" controls="" height="360" muted="" style="max-width:100%;height:auto;" width="750"><source src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/angle.mp4" type="video/mp4" />Your browser does not support the video tag or this video format.</video>
 
 <p>对于每个点，如果由该点、你的位置以及从你的位置直接向东的方向形成的角度 <strong>位于你的视野中</strong> ，那么你就可以看到它。</p>
 
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/89a07e9b-00ab-4967-976a-c723b2aa8656.png" style="height: 300px; width: 400px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/89a07e9b-00ab-4967-976a-c723b2aa8656.png" style="height: 300px; width: 400px;" /></p>
 
 <pre>
 <strong>输入：</strong>points = [[2,1],[2,2],[3,3]], angle = 90, location = [1,1]
@@ -38,7 +38,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/5010bfd3-86e6-465f-ac64-e9df941d2e49.png" style="height: 348px; width: 690px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/5010bfd3-86e6-465f-ac64-e9df941d2e49.png" style="height: 348px; width: 690px;" /></p>
 
 <pre>
 <strong>输入：</strong>points = [[1,0],[2,1]], angle = 13, location = [1,1]
diff --git a/solution/1600-1699/1610.Maximum Number of Visible Points/README_EN.md b/solution/1600-1699/1610.Maximum Number of Visible Points/README_EN.md
index 63dddce716996..02b6d76d136a2 100644
--- a/solution/1600-1699/1610.Maximum Number of Visible Points/README_EN.md	
+++ b/solution/1600-1699/1610.Maximum Number of Visible Points/README_EN.md	
@@ -9,7 +9,7 @@
 <p>Initially, you are facing directly east from your position. You <strong>cannot move</strong> from your position, but you can <strong>rotate</strong>. In other words, <code>pos<sub>x</sub></code> and <code>pos<sub>y</sub></code> cannot be changed. Your field of view in <strong>degrees</strong> is represented by <code>angle</code>, determining how wide you can see from any given view direction. Let <code>d</code> be the amount in degrees that you rotate counterclockwise. Then, your field of view is the <strong>inclusive</strong> range of angles <code>[d - angle/2, d + angle/2]</code>.</p>
 
 <p>
-<video autoplay="" controls="" height="360" muted="" style="max-width:100%;height:auto;" width="480"><source src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/angle.mp4" type="video/mp4" />Your browser does not support the video tag or this video format.</video>
+<video autoplay="" controls="" height="360" muted="" style="max-width:100%;height:auto;" width="480"><source src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/angle.mp4" type="video/mp4" />Your browser does not support the video tag or this video format.</video>
 </p>
 
 <p>You can <strong>see</strong> some set of points if, for each point, the <strong>angle</strong> formed by the point, your position, and the immediate east direction from your position is <strong>in your field of view</strong>.</p>
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/89a07e9b-00ab-4967-976a-c723b2aa8656.png" style="width: 400px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/89a07e9b-00ab-4967-976a-c723b2aa8656.png" style="width: 400px; height: 300px;" />
 <pre>
 <strong>Input:</strong> points = [[2,1],[2,2],[3,3]], angle = 90, location = [1,1]
 <strong>Output:</strong> 3
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/5010bfd3-86e6-465f-ac64-e9df941d2e49.png" style="width: 690px; height: 348px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1610.Maximum%20Number%20of%20Visible%20Points/images/5010bfd3-86e6-465f-ac64-e9df941d2e49.png" style="width: 690px; height: 348px;" />
 <pre>
 <strong>Input:</strong> points = [[1,0],[2,1]], angle = 13, location = [1,1]
 <strong>Output:</strong> 1
diff --git a/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README.md b/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README.md
index 6506fe0c4843f..159607fbdf74f 100644
--- a/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README.md	
+++ b/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree1.png" style="width: 211px; height: 131px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree1.png" style="width: 211px; height: 131px;" /></strong></p>
 
 <pre>
 <b>输入：</b>root1 = [+,a,+,null,null,b,c], root2 = [+,+,a,b,c]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree2.png" style="width: 211px; height: 131px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree2.png" style="width: 211px; height: 131px;" /></strong></p>
 
 <pre>
 <b>输入：</b> root1 = [+,a,+,null,null,b,c], root2 = [+,+,a,b,d]
diff --git a/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README_EN.md b/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README_EN.md
index 2d44df3bd2142..71906fc061f56 100644
--- a/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README_EN.md	
+++ b/solution/1600-1699/1612.Check If Two Expression Trees are Equivalent/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree1.png" style="width: 211px; height: 131px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree1.png" style="width: 211px; height: 131px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root1 = [+,a,+,null,null,b,c], root2 = [+,+,a,b,c]
@@ -29,7 +29,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree2.png" style="width: 211px; height: 131px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1612.Check%20If%20Two%20Expression%20Trees%20are%20Equivalent/images/tree2.png" style="width: 211px; height: 131px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> root1 = [+,a,+,null,null,b,c], root2 = [+,+,a,b,d]
diff --git a/solution/1600-1699/1615.Maximal Network Rank/README.md b/solution/1600-1699/1615.Maximal Network Rank/README.md
index 1ea8a1e612183..c33de06188d56 100644
--- a/solution/1600-1699/1615.Maximal Network Rank/README.md	
+++ b/solution/1600-1699/1615.Maximal Network Rank/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex1.png" style="width: 292px; height: 172px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex1.png" style="width: 292px; height: 172px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 4, roads = [[0,1],[0,3],[1,2],[1,3]]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex2.png" style="width: 292px; height: 172px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex2.png" style="width: 292px; height: 172px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>n = 5, roads = [[0,1],[0,3],[1,2],[1,3],[2,3],[2,4]]
diff --git a/solution/1600-1699/1615.Maximal Network Rank/README_EN.md b/solution/1600-1699/1615.Maximal Network Rank/README_EN.md
index 2cd37b4941430..1277019751686 100644
--- a/solution/1600-1699/1615.Maximal Network Rank/README_EN.md	
+++ b/solution/1600-1699/1615.Maximal Network Rank/README_EN.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex1.png" style="width: 292px; height: 172px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex1.png" style="width: 292px; height: 172px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 4, roads = [[0,1],[0,3],[1,2],[1,3]]
@@ -25,7 +25,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex2.png" style="width: 292px; height: 172px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1615.Maximal%20Network%20Rank/images/ex2.png" style="width: 292px; height: 172px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> n = 5, roads = [[0,1],[0,3],[1,2],[1,3],[2,3],[2,4]]
diff --git a/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README.md b/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README.md
index 3d083635b965f..f05078a354150 100644
--- a/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README.md	
+++ b/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1617.Count%20Subtrees%20With%20Max%20Distance%20Between%20Cities/images/p1.png" style="width: 161px; height: 181px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1617.Count%20Subtrees%20With%20Max%20Distance%20Between%20Cities/images/p1.png" style="width: 161px; height: 181px;" /></strong></p>
 
 <pre>
 <b>输入：</b>n = 4, edges = [[1,2],[2,3],[2,4]]
diff --git a/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README_EN.md b/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README_EN.md
index a560ff44d726e..c368f7a4eede0 100644
--- a/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README_EN.md	
+++ b/solution/1600-1699/1617.Count Subtrees With Max Distance Between Cities/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1617.Count%20Subtrees%20With%20Max%20Distance%20Between%20Cities/images/p1.png" style="width: 161px; height: 181px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1617.Count%20Subtrees%20With%20Max%20Distance%20Between%20Cities/images/p1.png" style="width: 161px; height: 181px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README.md b/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README.md
index b192373a9b0f2..5dd484c5bed0f 100644
--- a/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README.md	
+++ b/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README.md	
@@ -24,7 +24,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1620.Coordinate%20With%20Maximum%20Network%20Quality/images/untitled-diagram.png" style="width: 176px; height: 176px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1620.Coordinate%20With%20Maximum%20Network%20Quality/images/untitled-diagram.png" style="width: 176px; height: 176px;" />
 <pre>
 <b>输入：</b>towers = [[1,2,5],[2,1,7],[3,1,9]], radius = 2
 <b>输出：</b>[2,1]
diff --git a/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README_EN.md b/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README_EN.md
index beffa0a3a7298..96f70cc77b4db 100644
--- a/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README_EN.md	
+++ b/solution/1600-1699/1620.Coordinate With Maximum Network Quality/README_EN.md	
@@ -28,7 +28,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1620.Coordinate%20With%20Maximum%20Network%20Quality/images/untitled-diagram.png" style="width: 176px; height: 176px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1620.Coordinate%20With%20Maximum%20Network%20Quality/images/untitled-diagram.png" style="width: 176px; height: 176px;" />
 <pre>
 <strong>Input:</strong> towers = [[1,2,5],[2,1,7],[3,1,9]], radius = 2
 <strong>Output:</strong> [2,1]
diff --git a/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README.md b/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README.md
index af62293506bc2..40c1d312289fd 100644
--- a/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README.md	
+++ b/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1621.Number%20of%20Sets%20of%20K%20Non-Overlapping%20Line%20Segments/images/ex1.png" style="width: 179px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1621.Number%20of%20Sets%20of%20K%20Non-Overlapping%20Line%20Segments/images/ex1.png" style="width: 179px; height: 222px;" />
 <pre>
 <b>输入：</b>n = 4, k = 2
 <b>输出：</b>5
diff --git a/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README_EN.md b/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README_EN.md
index 978f502967b6f..29a731a651bf6 100644
--- a/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README_EN.md	
+++ b/solution/1600-1699/1621.Number of Sets of K Non-Overlapping Line Segments/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1621.Number%20of%20Sets%20of%20K%20Non-Overlapping%20Line%20Segments/images/ex1.png" style="width: 179px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1621.Number%20of%20Sets%20of%20K%20Non-Overlapping%20Line%20Segments/images/ex1.png" style="width: 179px; height: 222px;" />
 <pre>
 <strong>Input:</strong> n = 4, k = 2
 <strong>Output:</strong> 5
diff --git a/solution/1600-1699/1627.Graph Connectivity With Threshold/README.md b/solution/1600-1699/1627.Graph Connectivity With Threshold/README.md
index 59c5dc2f462ae..838b60916bcec 100644
--- a/solution/1600-1699/1627.Graph Connectivity With Threshold/README.md	
+++ b/solution/1600-1699/1627.Graph Connectivity With Threshold/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex1.jpg" style="width: 382px; height: 181px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex1.jpg" style="width: 382px; height: 181px;" /></p>
 
 <p> </p>
 
@@ -44,7 +44,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/tmp.jpg" style="width: 532px; height: 302px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/tmp.jpg" style="width: 532px; height: 302px;" /></p>
 
 <p> </p>
 
@@ -56,7 +56,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex3.jpg" style="width: 282px; height: 282px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex3.jpg" style="width: 282px; height: 282px;" /></p>
 
 <p> </p>
 
diff --git a/solution/1600-1699/1627.Graph Connectivity With Threshold/README_EN.md b/solution/1600-1699/1627.Graph Connectivity With Threshold/README_EN.md
index 1e38d9f80d74b..40859aab10561 100644
--- a/solution/1600-1699/1627.Graph Connectivity With Threshold/README_EN.md	
+++ b/solution/1600-1699/1627.Graph Connectivity With Threshold/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex1.jpg" style="width: 382px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex1.jpg" style="width: 382px; height: 181px;" />
 <pre>
 <strong>Input:</strong> n = 6, threshold = 2, queries = [[1,4],[2,5],[3,6]]
 <strong>Output:</strong> [false,false,true]
@@ -37,7 +37,7 @@ only ones directly connected. The result of each query:
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/tmp.jpg" style="width: 532px; height: 302px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/tmp.jpg" style="width: 532px; height: 302px;" />
 <pre>
 <strong>Input:</strong> n = 6, threshold = 0, queries = [[4,5],[3,4],[3,2],[2,6],[1,3]]
 <strong>Output:</strong> [true,true,true,true,true]
@@ -46,7 +46,7 @@ all divisors can be used. Since all numbers share 1 as a divisor, all cities are
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex3.jpg" style="width: 282px; height: 282px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1627.Graph%20Connectivity%20With%20Threshold/images/ex3.jpg" style="width: 282px; height: 282px;" />
 <pre>
 <strong>Input:</strong> n = 5, threshold = 1, queries = [[4,5],[4,5],[3,2],[2,3],[3,4]]
 <strong>Output:</strong> [false,false,false,false,false]
diff --git a/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README.md b/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README.md
index 43e08349e5529..47e2e783f07a4 100644
--- a/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README.md	
+++ b/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram.png" style="width: 242px; height: 241px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram.png" style="width: 242px; height: 241px;" /></strong></p>
 
 <pre>
 <b>输入：</b> s = ["3","4","+","2","*","7","/"]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram2.png" style="width: 222px; height: 232px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram2.png" style="width: 222px; height: 232px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> s = ["4","5","7","2","+","-","*"]
diff --git a/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README_EN.md b/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README_EN.md
index e0ee299b69590..468a994abdaa3 100644
--- a/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README_EN.md	
+++ b/solution/1600-1699/1628.Design an Expression Tree With Evaluate Function/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram.png" style="width: 242px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram.png" style="width: 242px; height: 241px;" />
 <pre>
 <strong>Input:</strong> s = [&quot;3&quot;,&quot;4&quot;,&quot;+&quot;,&quot;2&quot;,&quot;*&quot;,&quot;7&quot;,&quot;/&quot;]
 <strong>Output:</strong> 2
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram2.png" style="width: 222px; height: 232px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1628.Design%20an%20Expression%20Tree%20With%20Evaluate%20Function/images/untitled-diagram2.png" style="width: 222px; height: 232px;" />
 <pre>
 <strong>Input:</strong> s = [&quot;4&quot;,&quot;5&quot;,&quot;2&quot;,&quot;7&quot;,&quot;+&quot;,&quot;-&quot;,&quot;*&quot;]
 <strong>Output:</strong> -16
diff --git a/solution/1600-1699/1631.Path With Minimum Effort/README.md b/solution/1600-1699/1631.Path With Minimum Effort/README.md
index 9a85ed2f17040..765e9ce1ed7cf 100644
--- a/solution/1600-1699/1631.Path With Minimum Effort/README.md	
+++ b/solution/1600-1699/1631.Path With Minimum Effort/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex1.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex1.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 <b>输入：</b>heights = [[1,2,2],[3,8,2],[5,3,5]]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex2.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex2.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 <b>输入：</b>heights = [[1,2,3],[3,8,4],[5,3,5]]
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex3.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex3.png" style="width: 300px; height: 300px;" />
 <pre>
 <b>输入：</b>heights = [[1,2,1,1,1],[1,2,1,2,1],[1,2,1,2,1],[1,2,1,2,1],[1,1,1,2,1]]
 <b>输出：</b>0
diff --git a/solution/1600-1699/1631.Path With Minimum Effort/README_EN.md b/solution/1600-1699/1631.Path With Minimum Effort/README_EN.md
index 31513be0f6981..8f0009dac9a0e 100644
--- a/solution/1600-1699/1631.Path With Minimum Effort/README_EN.md	
+++ b/solution/1600-1699/1631.Path With Minimum Effort/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex1.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex1.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 
@@ -30,7 +30,7 @@ This is better than the route of [1,2,2,2,5], where the maximum absolute differe
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex2.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex2.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 
@@ -44,7 +44,7 @@ This is better than the route of [1,2,2,2,5], where the maximum absolute differe
 
 <p><strong>Example 3:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex3.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1631.Path%20With%20Minimum%20Effort/images/ex3.png" style="width: 300px; height: 300px;" />
 
 <pre>
 
diff --git a/solution/1600-1699/1632.Rank Transform of a Matrix/README.md b/solution/1600-1699/1632.Rank Transform of a Matrix/README.md
index e1169f0a8ff01..a9107bda64696 100644
--- a/solution/1600-1699/1632.Rank Transform of a Matrix/README.md	
+++ b/solution/1600-1699/1632.Rank Transform of a Matrix/README.md	
@@ -27,7 +27,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank1.jpg" style="width: 442px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank1.jpg" style="width: 442px; height: 162px;" />
 <pre>
 <b>输入：</b>matrix = [[1,2],[3,4]]
 <b>输出：</b>[[1,2],[2,3]]
@@ -39,21 +39,21 @@ matrix[1][1] 的秩为 3 ，因为 matrix[1][1] > matrix[0][1]， matrix[1][1] >
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank2.jpg" style="width: 442px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank2.jpg" style="width: 442px; height: 162px;" />
 <pre>
 <b>输入：</b>matrix = [[7,7],[7,7]]
 <b>输出：</b>[[1,1],[1,1]]
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank3.jpg" style="width: 601px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank3.jpg" style="width: 601px; height: 322px;" />
 <pre>
 <b>输入：</b>matrix = [[20,-21,14],[-19,4,19],[22,-47,24],[-19,4,19]]
 <b>输出：</b>[[4,2,3],[1,3,4],[5,1,6],[1,3,4]]
 </pre>
 
 <p><strong>示例 4：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank4.jpg" style="width: 601px; height: 242px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank4.jpg" style="width: 601px; height: 242px;" />
 <pre>
 <b>输入：</b>matrix = [[7,3,6],[1,4,5],[9,8,2]]
 <b>输出：</b>[[5,1,4],[1,2,3],[6,3,1]]
diff --git a/solution/1600-1699/1632.Rank Transform of a Matrix/README_EN.md b/solution/1600-1699/1632.Rank Transform of a Matrix/README_EN.md
index 878d717965ab6..db746f1587463 100644
--- a/solution/1600-1699/1632.Rank Transform of a Matrix/README_EN.md	
+++ b/solution/1600-1699/1632.Rank Transform of a Matrix/README_EN.md	
@@ -24,7 +24,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank1.jpg" style="width: 442px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank1.jpg" style="width: 442px; height: 162px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2],[3,4]]
 <strong>Output:</strong> [[1,2],[2,3]]
@@ -36,14 +36,14 @@ The rank of matrix[1][1] is 3 because matrix[1][1] &gt; matrix[0][1], matrix[1][
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank2.jpg" style="width: 442px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank2.jpg" style="width: 442px; height: 162px;" />
 <pre>
 <strong>Input:</strong> matrix = [[7,7],[7,7]]
 <strong>Output:</strong> [[1,1],[1,1]]
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank3.jpg" style="width: 601px; height: 322px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1632.Rank%20Transform%20of%20a%20Matrix/images/rank3.jpg" style="width: 601px; height: 322px;" />
 <pre>
 <strong>Input:</strong> matrix = [[20,-21,14],[-19,4,19],[22,-47,24],[-19,4,19]]
 <strong>Output:</strong> [[4,2,3],[1,3,4],[5,1,6],[1,3,4]]
diff --git a/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README.md b/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README.md
index 8edf1b8927e66..d183eeeb23739 100644
--- a/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README.md	
+++ b/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README.md	
@@ -18,7 +18,7 @@
 
 <p>例如，多项式 <code>5x<sup>3</sup> + 4x - 7</code> 可以表示成如下图所示的多项式链表：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/polynomial2.png" style="width: 500px; height: 91px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/polynomial2.png" style="width: 500px; height: 91px;" /></p>
 
 <p>多项式链表必须是标准形式的，即多项式必须<strong> 严格 </strong>按指数 <code>power</code> 的递减顺序排列（即降幂排列）。另外，系数 <code>coefficient</code> 为 <code>0</code> 的项需要省略。</p>
 
@@ -32,7 +32,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/ex1.png" style="width: 600px; height: 322px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/ex1.png" style="width: 600px; height: 322px;" /></p>
 
 <pre>
 <strong>输入：</strong>poly1 = [[1,1]], poly2 = [[1,0]]
diff --git a/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README_EN.md b/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README_EN.md
index 015b839459b9a..0513e6e5604b7 100644
--- a/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README_EN.md	
+++ b/solution/1600-1699/1634.Add Two Polynomials Represented as Linked Lists/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>For example, the polynomial <code>5x<sup>3</sup> + 4x - 7</code> is represented by the polynomial linked list illustrated below:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/polynomial2.png" style="width: 500px; height: 91px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/polynomial2.png" style="width: 500px; height: 91px;" /></p>
 
 <p>The polynomial linked list must be in its standard form: the polynomial must be in <strong>strictly</strong> descending order by its <code>power</code> value. Also, terms with a <code>coefficient</code> of <code>0</code> are omitted.</p>
 
@@ -30,7 +30,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/ex1.png" style="width: 600px; height: 322px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1634.Add%20Two%20Polynomials%20Represented%20as%20Linked%20Lists/images/ex1.png" style="width: 600px; height: 322px;" /></p>
 
 <pre>
 
diff --git a/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README.md b/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README.md
index 655f938ef6c67..6f027922900b3 100644
--- a/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README.md	
+++ b/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1637.Widest%20Vertical%20Area%20Between%20Two%20Points%20Containing%20No%20Points/images/points3.png" style="width: 276px; height: 371px;" />​
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1637.Widest%20Vertical%20Area%20Between%20Two%20Points%20Containing%20No%20Points/images/points3.png" style="width: 276px; height: 371px;" />​
 <pre>
 <b>输入：</b>points = [[8,7],[9,9],[7,4],[9,7]]
 <b>输出：</b>1
diff --git a/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README_EN.md b/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README_EN.md
index 0b8e7d986b75a..d6d6107cc3369 100644
--- a/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README_EN.md	
+++ b/solution/1600-1699/1637.Widest Vertical Area Between Two Points Containing No Points/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1637.Widest%20Vertical%20Area%20Between%20Two%20Points%20Containing%20No%20Points/images/points3.png" style="width: 276px; height: 371px;" />​
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1637.Widest%20Vertical%20Area%20Between%20Two%20Points%20Containing%20No%20Points/images/points3.png" style="width: 276px; height: 371px;" />​
 <pre>
 <strong>Input:</strong> points = [[8,7],[9,9],[7,4],[9,7]]
 <strong>Output:</strong> 1
diff --git a/solution/1600-1699/1642.Furthest Building You Can Reach/README.md b/solution/1600-1699/1642.Furthest Building You Can Reach/README.md
index c57f466d3d3de..380bb2e051436 100644
--- a/solution/1600-1699/1642.Furthest Building You Can Reach/README.md	
+++ b/solution/1600-1699/1642.Furthest Building You Can Reach/README.md	
@@ -21,7 +21,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1642.Furthest%20Building%20You%20Can%20Reach/images/q4.gif" style="width: 562px; height: 561px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1642.Furthest%20Building%20You%20Can%20Reach/images/q4.gif" style="width: 562px; height: 561px;" />
 <pre>
 <strong>输入：</strong>heights = [4,2,7,6,9,14,12], bricks = 5, ladders = 1
 <strong>输出：</strong>4
diff --git a/solution/1600-1699/1642.Furthest Building You Can Reach/README_EN.md b/solution/1600-1699/1642.Furthest Building You Can Reach/README_EN.md
index 5474a5490a5d2..ec4702574120a 100644
--- a/solution/1600-1699/1642.Furthest Building You Can Reach/README_EN.md	
+++ b/solution/1600-1699/1642.Furthest Building You Can Reach/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1642.Furthest%20Building%20You%20Can%20Reach/images/q4.gif" style="width: 562px; height: 561px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1642.Furthest%20Building%20You%20Can%20Reach/images/q4.gif" style="width: 562px; height: 561px;" />
 <pre>
 <strong>Input:</strong> heights = [4,2,7,6,9,14,12], bricks = 5, ladders = 1
 <strong>Output:</strong> 4
diff --git a/solution/1600-1699/1643.Kth Smallest Instructions/README.md b/solution/1600-1699/1643.Kth Smallest Instructions/README.md
index 28a30c81c2ee4..ae522ba25d303 100644
--- a/solution/1600-1699/1643.Kth Smallest Instructions/README.md	
+++ b/solution/1600-1699/1643.Kth Smallest Instructions/README.md	
@@ -28,7 +28,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex1.png" style="width: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex1.png" style="width: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>destination = [2,3], k = 1
@@ -39,7 +39,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex2.png" style="width: 300px; height: 229px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex2.png" style="width: 300px; height: 229px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>destination = [2,3], k = 2
@@ -48,7 +48,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex3.png" style="width: 300px; height: 229px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex3.png" style="width: 300px; height: 229px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>destination = [2,3], k = 3
diff --git a/solution/1600-1699/1643.Kth Smallest Instructions/README_EN.md b/solution/1600-1699/1643.Kth Smallest Instructions/README_EN.md
index d74158d27be22..a9a26bca9c9a2 100644
--- a/solution/1600-1699/1643.Kth Smallest Instructions/README_EN.md	
+++ b/solution/1600-1699/1643.Kth Smallest Instructions/README_EN.md	
@@ -22,7 +22,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex1.png" style="width: 300px; height: 229px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex1.png" style="width: 300px; height: 229px;" /></p>
 
 <pre>
 <strong>Input:</strong> destination = [2,3], k = 1
@@ -33,7 +33,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex2.png" style="width: 300px; height: 229px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex2.png" style="width: 300px; height: 229px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> destination = [2,3], k = 2
@@ -42,7 +42,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex3.png" style="width: 300px; height: 229px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1643.Kth%20Smallest%20Instructions/images/ex3.png" style="width: 300px; height: 229px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> destination = [2,3], k = 3
diff --git a/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README.md b/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README.md
index bf08b39b89197..30ad2614a7537 100644
--- a/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README.md	
+++ b/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" />
 <pre>
 <b>输入：</b> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <b>输出：</b> 3
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
 
 <pre>
 <b>输入：</b> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
@@ -30,7 +30,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
 
 <pre>
 <strong>输入：</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 10
diff --git a/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README_EN.md b/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README_EN.md
index f85f31458202d..4a4e3f5a54505 100644
--- a/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README_EN.md	
+++ b/solution/1600-1699/1644.Lowest Common Ancestor of a Binary Tree II/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
 
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
@@ -27,7 +27,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1644.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20II/images/binarytree.png" /></p>
 
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 10
diff --git a/solution/1600-1699/1645.Hopper Company Queries II/README.md b/solution/1600-1699/1645.Hopper Company Queries II/README.md
index b105ecbfedea9..6c4a3d4555916 100644
--- a/solution/1600-1699/1645.Hopper Company Queries II/README.md	
+++ b/solution/1600-1699/1645.Hopper Company Queries II/README.md	
@@ -57,7 +57,7 @@ It is guaranteed that each accepted ride exists in the Rides table.
 <p>&nbsp;</p>
 
 <p>Write an SQL query to report the <strong>percentage</strong> of working drivers (<code>working_percentage</code>) for each month of <strong>2020</strong> where:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/images/codecogseqn.png" style="width: 800px; height: 36px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/images/codecogseqn.png" style="width: 800px; height: 36px;" />
 <p><strong>Note</strong> that if the number of available drivers during a month is zero, we consider the <code>working_percentage</code> to be <code>0</code>.</p>
 
 <p>Return the result table ordered by <code>month</code> in <strong>ascending</strong> order, where <code>month</code> is the month&#39;s number (January is <code>1</code>, February is <code>2</code>, etc.). Round <code>working_percentage</code> to the nearest <strong>2 decimal places</strong>.</p>
diff --git a/solution/1600-1699/1645.Hopper Company Queries II/README_EN.md b/solution/1600-1699/1645.Hopper Company Queries II/README_EN.md
index 99473beb6f4b4..cfb1db11816af 100644
--- a/solution/1600-1699/1645.Hopper Company Queries II/README_EN.md	
+++ b/solution/1600-1699/1645.Hopper Company Queries II/README_EN.md	
@@ -55,7 +55,7 @@ It is guaranteed that each accepted ride exists in the Rides table.
 <p>&nbsp;</p>
 
 <p>Write an SQL query to report the <strong>percentage</strong> of working drivers (<code>working_percentage</code>) for each month of <strong>2020</strong> where:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/images/codecogseqn.png" style="width: 800px; height: 36px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1645.Hopper%20Company%20Queries%20II/images/codecogseqn.png" style="width: 800px; height: 36px;" />
 <p><strong>Note</strong> that if the number of available drivers during a month is zero, we consider the <code>working_percentage</code> to be <code>0</code>.</p>
 
 <p>Return the result table ordered by <code>month</code> in <strong>ascending</strong> order, where <code>month</code> is the month&#39;s number (January is <code>1</code>, February is <code>2</code>, etc.). Round <code>working_percentage</code> to the nearest <strong>2 decimal places</strong>.</p>
diff --git a/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README.md b/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README.md
index d6a38c2a4ddff..fc404eaf4d1e4 100644
--- a/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README.md	
+++ b/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1648.Sell%20Diminishing-Valued%20Colored%20Balls/images/jj.gif" style="width: 480px; height: 270px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1648.Sell%20Diminishing-Valued%20Colored%20Balls/images/jj.gif" style="width: 480px; height: 270px;" />
 <pre>
 <b>输入：</b>inventory = [2,5], orders = 4
 <b>输出：</b>14
diff --git a/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README_EN.md b/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README_EN.md
index 9345ab6184134..42e23a5f528d1 100644
--- a/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README_EN.md	
+++ b/solution/1600-1699/1648.Sell Diminishing-Valued Colored Balls/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1648.Sell%20Diminishing-Valued%20Colored%20Balls/images/jj.gif" style="width: 480px; height: 270px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1648.Sell%20Diminishing-Valued%20Colored%20Balls/images/jj.gif" style="width: 480px; height: 270px;" />
 <pre>
 <strong>Input:</strong> inventory = [2,5], orders = 4
 <strong>Output:</strong> 14
diff --git a/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README.md b/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README.md
index f47e108425ff3..4012c3b0581fc 100644
--- a/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README.md	
+++ b/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README.md	
@@ -23,14 +23,14 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <strong>输出:</strong> 3
 <strong>解释:</strong> 节点 5 和 1 的最近公共祖先是 3。
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
 <strong>输出:</strong> 5
 <strong>解释:</strong> 节点 5 和 4 的最近公共祖先是 5，根据定义，一个节点可以是自身的最近公共祖先。
diff --git a/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README_EN.md b/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README_EN.md
index b6361a4f29a81..4ed160215f14b 100644
--- a/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README_EN.md	
+++ b/solution/1600-1699/1650.Lowest Common Ancestor of a Binary Tree III/README_EN.md	
@@ -21,7 +21,7 @@ class Node {
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1
 <strong>Output:</strong> 3
@@ -29,7 +29,7 @@ class Node {
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1650.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20III/images/binarytree.png" style="width: 200px; height: 190px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 4
 <strong>Output:</strong> 5
diff --git a/solution/1600-1699/1656.Design an Ordered Stream/README.md b/solution/1600-1699/1656.Design an Ordered Stream/README.md
index 877967e72174f..6462d1035548f 100644
--- a/solution/1600-1699/1656.Design an Ordered Stream/README.md	
+++ b/solution/1600-1699/1656.Design an Ordered Stream/README.md	
@@ -28,7 +28,7 @@
 
 <p><strong>示例：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1656.Design%20an%20Ordered%20Stream/images/q1.gif" style="width: 682px; height: 240px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1656.Design%20an%20Ordered%20Stream/images/q1.gif" style="width: 682px; height: 240px;" /></strong></p>
 
 <pre>
 <strong>输入</strong>
diff --git a/solution/1600-1699/1656.Design an Ordered Stream/README_EN.md b/solution/1600-1699/1656.Design an Ordered Stream/README_EN.md
index 5db9ed5daec65..79bd91019c269 100644
--- a/solution/1600-1699/1656.Design an Ordered Stream/README_EN.md	
+++ b/solution/1600-1699/1656.Design an Ordered Stream/README_EN.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 <p><strong>Example:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1656.Design%20an%20Ordered%20Stream/images/q1.gif" style="width: 682px; height: 240px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1656.Design%20an%20Ordered%20Stream/images/q1.gif" style="width: 682px; height: 240px;" /></strong></p>
 
 <pre>
 <strong>Input</strong>
diff --git a/solution/1600-1699/1659.Maximize Grid Happiness/README.md b/solution/1600-1699/1659.Maximize Grid Happiness/README.md
index f106d321910a8..6799be688279c 100644
--- a/solution/1600-1699/1659.Maximize Grid Happiness/README.md	
+++ b/solution/1600-1699/1659.Maximize Grid Happiness/README.md	
@@ -24,7 +24,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1659.Maximize%20Grid%20Happiness/images/grid_happiness.png" style="width: 261px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1659.Maximize%20Grid%20Happiness/images/grid_happiness.png" style="width: 261px; height: 121px;" />
 <pre>
 <strong>输入：</strong>m = 2, n = 3, introvertsCount = 1, extrovertsCount = 2
 <strong>输出：</strong>240
diff --git a/solution/1600-1699/1659.Maximize Grid Happiness/README_EN.md b/solution/1600-1699/1659.Maximize Grid Happiness/README_EN.md
index 31a97f7d981a2..a3a3a5e5c4ef5 100644
--- a/solution/1600-1699/1659.Maximize Grid Happiness/README_EN.md	
+++ b/solution/1600-1699/1659.Maximize Grid Happiness/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1659.Maximize%20Grid%20Happiness/images/grid_happiness.png" style="width: 261px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1659.Maximize%20Grid%20Happiness/images/grid_happiness.png" style="width: 261px; height: 121px;" />
 <pre>
 <strong>Input:</strong> m = 2, n = 3, introvertsCount = 1, extrovertsCount = 2
 <strong>Output:</strong> 240
diff --git a/solution/1600-1699/1660.Correct a Binary Tree/README.md b/solution/1600-1699/1660.Correct a Binary Tree/README.md
index e0c25ae9fda5d..fd47dd2894da3 100644
--- a/solution/1600-1699/1660.Correct a Binary Tree/README.md	
+++ b/solution/1600-1699/1660.Correct a Binary Tree/README.md	
@@ -26,7 +26,7 @@
 
 <p><b>示例 1:</b></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex1v2.png" style="width: 250px; height: 177px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex1v2.png" style="width: 250px; height: 177px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> root = [1,2,3], fromNode = 2, toNode = 3
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex2v3.png" style="width: 350px; height: 255px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex2v3.png" style="width: 350px; height: 255px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> root = [8,3,1,7,null,9,4,2,null,null,null,5,6], fromNode = 7, toNode = 4
diff --git a/solution/1600-1699/1660.Correct a Binary Tree/README_EN.md b/solution/1600-1699/1660.Correct a Binary Tree/README_EN.md
index f2e999afad727..3792415045ce6 100644
--- a/solution/1600-1699/1660.Correct a Binary Tree/README_EN.md	
+++ b/solution/1600-1699/1660.Correct a Binary Tree/README_EN.md	
@@ -24,7 +24,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex1v2.png" style="width: 250px; height: 177px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex1v2.png" style="width: 250px; height: 177px;" /></strong></p>
 
 <pre>
 
@@ -38,7 +38,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex2v3.png" style="width: 350px; height: 255px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1660.Correct%20a%20Binary%20Tree/images/ex2v3.png" style="width: 350px; height: 255px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1600-1699/1666.Change the Root of a Binary Tree/README.md b/solution/1600-1699/1666.Change the Root of a Binary Tree/README.md
index aa6b2545d1a4b..d858ed0fa8203 100644
--- a/solution/1600-1699/1666.Change the Root of a Binary Tree/README.md	
+++ b/solution/1600-1699/1666.Change the Root of a Binary Tree/README.md	
@@ -22,7 +22,7 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1666.Change%20the%20Root%20of%20a%20Binary%20Tree/images/fliptree.png" style="width: 400px; height: 298px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1666.Change%20the%20Root%20of%20a%20Binary%20Tree/images/fliptree.png" style="width: 400px; height: 298px;">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], leaf = 7
 <strong>输出:</strong> [7,2,null,5,4,3,6,null,null,null,1,null,null,0,8]
 </pre>
diff --git a/solution/1600-1699/1666.Change the Root of a Binary Tree/README_EN.md b/solution/1600-1699/1666.Change the Root of a Binary Tree/README_EN.md
index dc3aeeeaefaac..786ef6a5c3c55 100644
--- a/solution/1600-1699/1666.Change the Root of a Binary Tree/README_EN.md	
+++ b/solution/1600-1699/1666.Change the Root of a Binary Tree/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1666.Change%20the%20Root%20of%20a%20Binary%20Tree/images/fliptree.png" style="width: 400px; height: 298px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1666.Change%20the%20Root%20of%20a%20Binary%20Tree/images/fliptree.png" style="width: 400px; height: 298px;" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], leaf = 7
 <strong>Output:</strong> [7,2,null,5,4,3,6,null,null,null,1,null,null,0,8]
diff --git a/solution/1600-1699/1669.Merge In Between Linked Lists/README.md b/solution/1600-1699/1669.Merge In Between Linked Lists/README.md
index 22d42943d2a28..7b868df60b0e7 100644
--- a/solution/1600-1699/1669.Merge In Between Linked Lists/README.md	
+++ b/solution/1600-1699/1669.Merge In Between Linked Lists/README.md	
@@ -11,14 +11,14 @@
 <p>请你将&nbsp;<code>list1</code>&nbsp;中下标从 <code>a</code> 到 <code>b</code> 的全部节点都删除，并将<code>list2</code>&nbsp;接在被删除节点的位置。</p>
 
 <p>下图中蓝色边和节点展示了操作后的结果：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/fig1.png" style="height: 130px; width: 504px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/fig1.png" style="height: 130px; width: 504px;" />
 <p>请你返回结果链表的头指针。</p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex1.png" style="width: 406px; height: 140px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex1.png" style="width: 406px; height: 140px;" /></p>
 
 <pre>
 <b>输入：</b>list1 = [0,1,2,3,4,5], a = 3, b = 4, list2 = [1000000,1000001,1000002]
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex2.png" style="width: 463px; height: 140px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex2.png" style="width: 463px; height: 140px;" />
 <pre>
 <b>输入：</b>list1 = [0,1,2,3,4,5,6], a = 2, b = 5, list2 = [1000000,1000001,1000002,1000003,1000004]
 <b>输出：</b>[0,1,1000000,1000001,1000002,1000003,1000004,6]
diff --git a/solution/1600-1699/1669.Merge In Between Linked Lists/README_EN.md b/solution/1600-1699/1669.Merge In Between Linked Lists/README_EN.md
index 26c7b088e0798..2bab790f949f0 100644
--- a/solution/1600-1699/1669.Merge In Between Linked Lists/README_EN.md	
+++ b/solution/1600-1699/1669.Merge In Between Linked Lists/README_EN.md	
@@ -9,12 +9,12 @@
 <p>Remove <code>list1</code>&#39;s nodes from the <code>a<sup>th</sup></code> node to the <code>b<sup>th</sup></code> node, and put <code>list2</code> in their place.</p>
 
 <p>The blue edges and nodes in the following figure indicate the result:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/fig1.png" style="height: 130px; width: 504px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/fig1.png" style="height: 130px; width: 504px;" />
 <p><em>Build the result list and return its head.</em></p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex1.png" style="width: 406px; height: 140px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex1.png" style="width: 406px; height: 140px;" />
 <pre>
 <strong>Input:</strong> list1 = [0,1,2,3,4,5], a = 3, b = 4, list2 = [1000000,1000001,1000002]
 <strong>Output:</strong> [0,1,2,1000000,1000001,1000002,5]
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex2.png" style="width: 463px; height: 140px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1669.Merge%20In%20Between%20Linked%20Lists/images/merge_linked_list_ex2.png" style="width: 463px; height: 140px;" />
 <pre>
 <strong>Input:</strong> list1 = [0,1,2,3,4,5,6], a = 2, b = 5, list2 = [1000000,1000001,1000002,1000003,1000004]
 <strong>Output:</strong> [0,1,1000000,1000001,1000002,1000003,1000004,6]
diff --git a/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README.md b/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README.md
index 1b97579e71c41..eef1758de9cfb 100644
--- a/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README.md	
+++ b/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README.md	
@@ -13,14 +13,14 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [4,7]
 <strong>输出:</strong> 2
 <strong>解释:</strong> 节点 4 和 7 的最近公共祖先是 2。
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [1]
 <strong>输出:</strong> 1
 <strong>解释:</strong> 单个节点的最近公共祖先是该节点本身。
@@ -28,14 +28,14 @@
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [7,6,2,4]
 <strong>输出:</strong> 5
 <strong>解释:</strong> 节点 7、6、2 和 4 的最近公共祖先节点是 5。
 </pre>
 
 <p><strong>示例 4:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png">
 <pre><strong>输入:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [0,1,2,3,4,5,6,7,8]
 <strong>输出:</strong> 3
 <strong>解释:</strong> 树中所有节点的最近公共祖先是根节点。
diff --git a/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README_EN.md b/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README_EN.md
index 13c695c6a2ed9..1f6ca403fd6c2 100644
--- a/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README_EN.md	
+++ b/solution/1600-1699/1676.Lowest Common Ancestor of a Binary Tree IV/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [4,7]
 <strong>Output:</strong> 2
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [1]
 <strong>Output:</strong> 1
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1676.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree%20IV/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], nodes = [7,6,2,4]
 <strong>Output:</strong> 5
diff --git a/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README.md b/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README.md
index 1e0110ef5e495..2ca30d93b2980 100644
--- a/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README.md	
+++ b/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1691.Maximum%20Height%20by%20Stacking%20Cuboids/images/image.jpg" style="width: 420px; height: 299px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1691.Maximum%20Height%20by%20Stacking%20Cuboids/images/image.jpg" style="width: 420px; height: 299px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>cuboids = [[50,45,20],[95,37,53],[45,23,12]]
diff --git a/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README_EN.md b/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README_EN.md
index 319a2f33d3882..6d2ce399b7851 100644
--- a/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README_EN.md	
+++ b/solution/1600-1699/1691.Maximum Height by Stacking Cuboids/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1691.Maximum%20Height%20by%20Stacking%20Cuboids/images/image.jpg" style="width: 420px; height: 299px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1691.Maximum%20Height%20by%20Stacking%20Cuboids/images/image.jpg" style="width: 420px; height: 299px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> cuboids = [[50,45,20],[95,37,53],[45,23,12]]
diff --git a/solution/1600-1699/1692.Count Ways to Distribute Candies/README.md b/solution/1600-1699/1692.Count Ways to Distribute Candies/README.md
index 002c7446e4be6..ee2be46b0af5a 100644
--- a/solution/1600-1699/1692.Count Ways to Distribute Candies/README.md	
+++ b/solution/1600-1699/1692.Count Ways to Distribute Candies/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1692.Count%20Ways%20to%20Distribute%20Candies/images/candies-1.png" style="height: 248px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1692.Count%20Ways%20to%20Distribute%20Candies/images/candies-1.png" style="height: 248px; width: 600px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 3, k = 2
diff --git a/solution/1600-1699/1692.Count Ways to Distribute Candies/README_EN.md b/solution/1600-1699/1692.Count Ways to Distribute Candies/README_EN.md
index a85a601a7e9fd..16c34fb8df4c8 100644
--- a/solution/1600-1699/1692.Count Ways to Distribute Candies/README_EN.md	
+++ b/solution/1600-1699/1692.Count Ways to Distribute Candies/README_EN.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1692.Count%20Ways%20to%20Distribute%20Candies/images/candies-1.png" style="height: 248px; width: 600px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1692.Count%20Ways%20to%20Distribute%20Candies/images/candies-1.png" style="height: 248px; width: 600px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 3, k = 2
diff --git a/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README.md b/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README.md
index 2c40d5fa2792b..892a8fbedf457 100644
--- a/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README.md	
+++ b/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/h.png" style="width: 267px; height: 262px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/h.png" style="width: 267px; height: 262px;" />
 <pre>
 <b>输入：</b>n = 3, edgeList = [[0,1,2],[1,2,4],[2,0,8],[1,0,16]], queries = [[0,1,2],[0,2,5]]
 <b>输出：</b>[false,true]
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/q.png" style="width: 390px; height: 358px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/q.png" style="width: 390px; height: 358px;" />
 <pre>
 <b>输入：</b>n = 5, edgeList = [[0,1,10],[1,2,5],[2,3,9],[3,4,13]], queries = [[0,4,14],[1,4,13]]
 <b>输出：</b>[true,false]
diff --git a/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README_EN.md b/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README_EN.md
index 6df4daa8707dd..7a7ae5f6bdfe6 100644
--- a/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README_EN.md	
+++ b/solution/1600-1699/1697.Checking Existence of Edge Length Limited Paths/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/h.png" style="width: 267px; height: 262px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/h.png" style="width: 267px; height: 262px;" />
 <pre>
 <strong>Input:</strong> n = 3, edgeList = [[0,1,2],[1,2,4],[2,0,8],[1,0,16]], queries = [[0,1,2],[0,2,5]]
 <strong>Output:</strong> [false,true]
@@ -22,7 +22,7 @@ For the second query, there is a path (0 -&gt; 1 -&gt; 2) of two edges with dist
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/q.png" style="width: 390px; height: 358px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1600-1699/1697.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths/images/q.png" style="width: 390px; height: 358px;" />
 <pre>
 <strong>Input:</strong> n = 5, edgeList = [[0,1,10],[1,2,5],[2,3,9],[3,4,13]], queries = [[0,4,14],[1,4,13]]
 <strong>Output:</strong> [true,false]
diff --git a/solution/1700-1799/1706.Where Will the Ball Fall/README.md b/solution/1700-1799/1706.Where Will the Ball Fall/README.md
index 2dcb63ddc6795..5d2922e2f3feb 100644
--- a/solution/1700-1799/1706.Where Will the Ball Fall/README.md	
+++ b/solution/1700-1799/1706.Where Will the Ball Fall/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1706.Where%20Will%20the%20Ball%20Fall/images/ball.jpg" style="width: 500px; height: 385px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1706.Where%20Will%20the%20Ball%20Fall/images/ball.jpg" style="width: 500px; height: 385px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,1,1,-1,-1],[1,1,1,-1,-1],[-1,-1,-1,1,1],[1,1,1,1,-1],[-1,-1,-1,-1,-1]]
diff --git a/solution/1700-1799/1706.Where Will the Ball Fall/README_EN.md b/solution/1700-1799/1706.Where Will the Ball Fall/README_EN.md
index a82b69e51ecc4..94835c70a4693 100644
--- a/solution/1700-1799/1706.Where Will the Ball Fall/README_EN.md	
+++ b/solution/1700-1799/1706.Where Will the Ball Fall/README_EN.md	
@@ -20,7 +20,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1706.Where%20Will%20the%20Ball%20Fall/images/ball.jpg" style="width: 500px; height: 385px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1706.Where%20Will%20the%20Ball%20Fall/images/ball.jpg" style="width: 500px; height: 385px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,-1,-1],[1,1,1,-1,-1],[-1,-1,-1,1,1],[1,1,1,1,-1],[-1,-1,-1,-1,-1]]
diff --git a/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README.md b/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README.md
index 546b1cc493bce..640553552e4d7 100644
--- a/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README.md	
+++ b/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README.md	
@@ -38,7 +38,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/trees2.png" style="width: 208px; height: 221px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/trees2.png" style="width: 208px; height: 221px;" />
 <pre>
 <b>输入：</b>pairs = [[1,2],[2,3]]
 <b>输出：</b>1
@@ -46,7 +46,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/tree.png" style="width: 234px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/tree.png" style="width: 234px; height: 241px;" />
 <pre>
 <b>输入：</b>pairs = [[1,2],[2,3],[1,3]]
 <b>输出：</b>2
diff --git a/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README_EN.md b/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README_EN.md
index 3ffc1a59b2bc2..b6a47e3c00bac 100644
--- a/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README_EN.md	
+++ b/solution/1700-1799/1719.Number Of Ways To Reconstruct A Tree/README_EN.md	
@@ -35,7 +35,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/trees2.png" style="width: 208px; height: 221px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/trees2.png" style="width: 208px; height: 221px;" />
 <pre>
 <strong>Input:</strong> pairs = [[1,2],[2,3]]
 <strong>Output:</strong> 1
@@ -43,7 +43,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/tree.png" style="width: 234px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1719.Number%20Of%20Ways%20To%20Reconstruct%20A%20Tree/images/tree.png" style="width: 234px; height: 241px;" />
 <pre>
 <strong>Input:</strong> pairs = [[1,2],[2,3],[1,3]]
 <strong>Output:</strong> 2
diff --git a/solution/1700-1799/1721.Swapping Nodes in a Linked List/README.md b/solution/1700-1799/1721.Swapping Nodes in a Linked List/README.md
index 99ef88ab3ea08..c46c8af58cf82 100644
--- a/solution/1700-1799/1721.Swapping Nodes in a Linked List/README.md	
+++ b/solution/1700-1799/1721.Swapping Nodes in a Linked List/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1721.Swapping%20Nodes%20in%20a%20Linked%20List/images/linked1.jpg" style="width: 722px; height: 202px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1721.Swapping%20Nodes%20in%20a%20Linked%20List/images/linked1.jpg" style="width: 722px; height: 202px;" />
 <pre>
 <strong>输入：</strong>head = [1,2,3,4,5], k = 2
 <strong>输出：</strong>[1,4,3,2,5]
diff --git a/solution/1700-1799/1721.Swapping Nodes in a Linked List/README_EN.md b/solution/1700-1799/1721.Swapping Nodes in a Linked List/README_EN.md
index 91531134aa6a8..8d145b2ce07d2 100644
--- a/solution/1700-1799/1721.Swapping Nodes in a Linked List/README_EN.md	
+++ b/solution/1700-1799/1721.Swapping Nodes in a Linked List/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1721.Swapping%20Nodes%20in%20a%20Linked%20List/images/linked1.jpg" style="width: 400px; height: 112px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1721.Swapping%20Nodes%20in%20a%20Linked%20List/images/linked1.jpg" style="width: 400px; height: 112px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4,5], k = 2
 <strong>Output:</strong> [1,4,3,2,5]
diff --git a/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README.md b/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README.md
index 6d31b890985dd..f8c46bc850211 100644
--- a/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README.md	
+++ b/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README.md	
@@ -19,7 +19,7 @@
 
 <p><b>示例 1:</b></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1724.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths%20II/images/messed.png" style="width: 300px; height: 298px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1724.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths%20II/images/messed.png" style="width: 300px; height: 298px;"></strong></p>
 
 <pre><b>输入：</b>
 ["DistanceLimitedPathsExist", "query", "query", "query", "query"]
diff --git a/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README_EN.md b/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README_EN.md
index 38a4222fdd2bf..aac8363737b53 100644
--- a/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README_EN.md	
+++ b/solution/1700-1799/1724.Checking Existence of Edge Length Limited Paths II/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1724.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths%20II/images/messed.png" style="width: 300px; height: 298px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1724.Checking%20Existence%20of%20Edge%20Length%20Limited%20Paths%20II/images/messed.png" style="width: 300px; height: 298px;" /></strong></p>
 
 <pre>
 
diff --git a/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README.md b/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README.md
index b07b6745a9dfa..92fc1f6687060 100644
--- a/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README.md	
+++ b/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40536-pm.png" style="width: 300px; height: 144px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40536-pm.png" style="width: 300px; height: 144px;" /></strong></p>
 
 <pre>
 <b>输入：</b>matrix = [[0,0,1],[1,1,1],[1,0,1]]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40852-pm.png" style="width: 500px; height: 62px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40852-pm.png" style="width: 500px; height: 62px;" /></p>
 
 <pre>
 <b>输入：</b>matrix = [[1,0,1,0,1]]
diff --git a/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README_EN.md b/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README_EN.md
index 82e9765042bde..a869e905c15cc 100644
--- a/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README_EN.md	
+++ b/solution/1700-1799/1727.Largest Submatrix With Rearrangements/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40536-pm.png" style="width: 500px; height: 240px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40536-pm.png" style="width: 500px; height: 240px;" />
 <pre>
 <strong>Input:</strong> matrix = [[0,0,1],[1,1,1],[1,0,1]]
 <strong>Output:</strong> 4
@@ -19,7 +19,7 @@ The largest submatrix of 1s, in bold, has an area of 4.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40852-pm.png" style="width: 500px; height: 62px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1727.Largest%20Submatrix%20With%20Rearrangements/images/screenshot-2020-12-30-at-40852-pm.png" style="width: 500px; height: 62px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,0,1,0,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1700-1799/1728.Cat and Mouse II/README.md b/solution/1700-1799/1728.Cat and Mouse II/README.md
index bb2522612143f..dc19968a0e962 100644
--- a/solution/1700-1799/1728.Cat and Mouse II/README.md	
+++ b/solution/1700-1799/1728.Cat and Mouse II/README.md	
@@ -43,7 +43,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_111_1955.png" style="width: 580px; height: 239px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_111_1955.png" style="width: 580px; height: 239px;" /></strong></p>
 
 <pre>
 <b>输入：</b>grid = ["####F","#C...","M...."], catJump = 1, mouseJump = 2
@@ -53,7 +53,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_2_1955.png" style="width: 580px; height: 175px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_2_1955.png" style="width: 580px; height: 175px;" /></p>
 
 <pre>
 <b>输入：</b>grid = ["M.C...F"], catJump = 1, mouseJump = 4
diff --git a/solution/1700-1799/1728.Cat and Mouse II/README_EN.md b/solution/1700-1799/1728.Cat and Mouse II/README_EN.md
index 8793af80901a5..6f8aeec8647a5 100644
--- a/solution/1700-1799/1728.Cat and Mouse II/README_EN.md	
+++ b/solution/1700-1799/1728.Cat and Mouse II/README_EN.md	
@@ -39,7 +39,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_111_1955.png" style="width: 580px; height: 239px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_111_1955.png" style="width: 580px; height: 239px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;####F&quot;,&quot;#C...&quot;,&quot;M....&quot;], catJump = 1, mouseJump = 2
 <strong>Output:</strong> true
@@ -47,7 +47,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_2_1955.png" style="width: 580px; height: 175px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1728.Cat%20and%20Mouse%20II/images/sample_2_1955.png" style="width: 580px; height: 175px;" />
 <pre>
 <strong>Input:</strong> grid = [&quot;M.C...F&quot;], catJump = 1, mouseJump = 4
 <strong>Output:</strong> true
diff --git a/solution/1700-1799/1730.Shortest Path to Get Food/README.md b/solution/1700-1799/1730.Shortest Path to Get Food/README.md
index f85edf5872f72..d95da199160d4 100644
--- a/solution/1700-1799/1730.Shortest Path to Get Food/README.md	
+++ b/solution/1700-1799/1730.Shortest Path to Get Food/README.md	
@@ -22,14 +22,14 @@
 <p>&nbsp;</p>
 
 <p><b>示例 1:</b></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img1.jpg" style="width: 300px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img1.jpg" style="width: 300px; height: 201px;" />
 <pre>
 <b>输入：</b> grid = [["X","X","X","X","X","X"],["X","*","O","O","O","X"],["X","O","O","#","O","X"],["X","X","X","X","X","X"]]
 <b>输出：</b> 3
 <b>解释： </b>要拿到食物，你需要走 3 步。</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img2.jpg" style="width: 300px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img2.jpg" style="width: 300px; height: 241px;" />
 <pre>
 <b>输入：</b> grid = [["X","X","X","X","X"],["X","*","X","O","X"],["X","O","X","#","X"],["X","X","X","X","X"]]
 <b>输出：</b> -1
@@ -37,7 +37,7 @@
 </pre>
 
 <p><strong>示例&nbsp;3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img3.jpg" style="width: 300px; height: 188px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img3.jpg" style="width: 300px; height: 188px;" />
 <pre>
 <strong>输入:</strong> grid = [["X","X","X","X","X","X","X","X"],["X","*","O","X","O","#","O","X"],["X","O","O","X","O","O","X","X"],["X","O","O","O","O","#","O","X"],["X","X","X","X","X","X","X","X"]]
 <strong>输出:</strong> 6
diff --git a/solution/1700-1799/1730.Shortest Path to Get Food/README_EN.md b/solution/1700-1799/1730.Shortest Path to Get Food/README_EN.md
index fc6e558445ccc..1dd5e8c8cc62d 100644
--- a/solution/1700-1799/1730.Shortest Path to Get Food/README_EN.md	
+++ b/solution/1700-1799/1730.Shortest Path to Get Food/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img1.jpg" style="width: 300px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img1.jpg" style="width: 300px; height: 201px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;*&quot;,&quot;O&quot;,&quot;O&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;#&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;]]
 <strong>Output:</strong> 3
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img2.jpg" style="width: 300px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img2.jpg" style="width: 300px; height: 241px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;*&quot;,&quot;X&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;X&quot;,&quot;#&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;]]
 <strong>Output:</strong> -1
@@ -37,7 +37,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img3.jpg" style="width: 300px; height: 188px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1730.Shortest%20Path%20to%20Get%20Food/images/img3.jpg" style="width: 300px; height: 188px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;*&quot;,&quot;O&quot;,&quot;X&quot;,&quot;O&quot;,&quot;#&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;X&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;O&quot;,&quot;O&quot;,&quot;O&quot;,&quot;O&quot;,&quot;#&quot;,&quot;O&quot;,&quot;X&quot;],[&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;,&quot;X&quot;]]
 <strong>Output:</strong> 6
diff --git a/solution/1700-1799/1739.Building Boxes/README.md b/solution/1700-1799/1739.Building Boxes/README.md
index 936d31628b8e6..48308a494a2af 100644
--- a/solution/1700-1799/1739.Building Boxes/README.md	
+++ b/solution/1700-1799/1739.Building Boxes/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/3-boxes.png" style="width: 135px; height: 143px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/3-boxes.png" style="width: 135px; height: 143px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 3
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/4-boxes.png" style="width: 135px; height: 179px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/4-boxes.png" style="width: 135px; height: 179px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 4
@@ -41,7 +41,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/10-boxes.png" style="width: 271px; height: 257px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/10-boxes.png" style="width: 271px; height: 257px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 10
diff --git a/solution/1700-1799/1739.Building Boxes/README_EN.md b/solution/1700-1799/1739.Building Boxes/README_EN.md
index 1f4461a52747f..fbd443866facf 100644
--- a/solution/1700-1799/1739.Building Boxes/README_EN.md	
+++ b/solution/1700-1799/1739.Building Boxes/README_EN.md	
@@ -16,7 +16,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/3-boxes.png" style="width: 135px; height: 143px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/3-boxes.png" style="width: 135px; height: 143px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 3
@@ -27,7 +27,7 @@ These boxes are placed in the corner of the room, where the corner is on the lef
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/4-boxes.png" style="width: 135px; height: 179px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/4-boxes.png" style="width: 135px; height: 179px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4
@@ -38,7 +38,7 @@ These boxes are placed in the corner of the room, where the corner is on the lef
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/10-boxes.png" style="width: 271px; height: 257px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1739.Building%20Boxes/images/10-boxes.png" style="width: 271px; height: 257px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 10
diff --git a/solution/1700-1799/1740.Find Distance in a Binary Tree/README.md b/solution/1700-1799/1740.Find Distance in a Binary Tree/README.md
index 415a2b5f71b27..360413b8d24bc 100644
--- a/solution/1700-1799/1740.Find Distance in a Binary Tree/README.md	
+++ b/solution/1700-1799/1740.Find Distance in a Binary Tree/README.md	
@@ -13,21 +13,21 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 0
 <strong>输出：</strong>3
 <strong>解释：</strong>在 5 和 0 之间有 3 条边：5-3-1-0</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 7
 <strong>输出：</strong>2
 <strong>解释：</strong>在 5 和 7 之间有 2 条边：5-2-7</pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 5
 <strong>输出：</strong>0
diff --git a/solution/1700-1799/1740.Find Distance in a Binary Tree/README_EN.md b/solution/1700-1799/1740.Find Distance in a Binary Tree/README_EN.md
index 0b55278068a98..7226f64ca0081 100644
--- a/solution/1700-1799/1740.Find Distance in a Binary Tree/README_EN.md	
+++ b/solution/1700-1799/1740.Find Distance in a Binary Tree/README_EN.md	
@@ -10,21 +10,21 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 0
 <strong>Output:</strong> 3
 <strong>Explanation:</strong> There are 3 edges between 5 and 0: 5-3-1-0.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 7
 <strong>Output:</strong> 2
 <strong>Explanation:</strong> There are 2 edges between 5 and 7: 5-2-7.</pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1740.Find%20Distance%20in%20a%20Binary%20Tree/images/binarytree.png" />
 <pre>
 <strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 5
 <strong>Output:</strong> 0
diff --git a/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README.md b/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README.md
index b2389ca50fac6..06b2cb964ca0b 100644
--- a/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README.md	
+++ b/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60048-pm.png" style="width: 400px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60048-pm.png" style="width: 400px; height: 103px;" /></p>
 
 <pre>
 <b>输入：</b>events = [[1,2,4],[3,4,3],[2,3,1]], k = 2
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60150-pm.png" style="width: 400px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60150-pm.png" style="width: 400px; height: 103px;" /></p>
 
 <pre>
 <b>输入：</b>events = [[1,2,4],[3,4,3],[2,3,10]], k = 2
@@ -35,7 +35,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60703-pm.png" style="width: 400px; height: 126px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60703-pm.png" style="width: 400px; height: 126px;" /></strong></p>
 
 <pre>
 <b>输入：</b>events = [[1,1,1],[2,2,2],[3,3,3],[4,4,4]], k = 3
diff --git a/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README_EN.md b/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README_EN.md
index b380a10cb7ddd..c574a24bcc96f 100644
--- a/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README_EN.md	
+++ b/solution/1700-1799/1751.Maximum Number of Events That Can Be Attended II/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60048-pm.png" style="width: 400px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60048-pm.png" style="width: 400px; height: 103px;" /></p>
 
 <pre>
 <strong>Input:</strong> events = [[1,2,4],[3,4,3],[2,3,1]], k = 2
@@ -22,7 +22,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60150-pm.png" style="width: 400px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60150-pm.png" style="width: 400px; height: 103px;" /></p>
 
 <pre>
 <strong>Input:</strong> events = [[1,2,4],[3,4,3],[2,3,10]], k = 2
@@ -32,7 +32,7 @@ Notice that you cannot attend any other event as they overlap, and that you do <
 
 <p><strong>Example 3:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60703-pm.png" style="width: 400px; height: 126px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1751.Maximum%20Number%20of%20Events%20That%20Can%20Be%20Attended%20II/images/screenshot-2021-01-11-at-60703-pm.png" style="width: 400px; height: 126px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> events = [[1,1,1],[2,2,2],[3,3,3],[4,4,4]], k = 3
diff --git a/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README.md b/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README.md
index ac32feb7fa24d..2c1af5c746119 100644
--- a/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README.md	
+++ b/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios1.png" style="width: 388px; height: 164px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios1.png" style="width: 388px; height: 164px;" />
 <pre>
 <b>输入：</b>n = 6, edges = [[1,2],[1,3],[3,2],[4,1],[5,2],[3,6]]
 <b>输出：</b>3
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios2.png" style="width: 388px; height: 164px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios2.png" style="width: 388px; height: 164px;" />
 <pre>
 <b>输入：</b>n = 7, edges = [[1,3],[4,1],[4,3],[2,5],[5,6],[6,7],[7,5],[2,6]]
 <b>输出：</b>0
diff --git a/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README_EN.md b/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README_EN.md
index 395e42c522a3e..3900ec7a15f79 100644
--- a/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README_EN.md	
+++ b/solution/1700-1799/1761.Minimum Degree of a Connected Trio in a Graph/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios1.png" style="width: 388px; height: 164px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios1.png" style="width: 388px; height: 164px;" />
 <pre>
 <strong>Input:</strong> n = 6, edges = [[1,2],[1,3],[3,2],[4,1],[5,2],[3,6]]
 <strong>Output:</strong> 3
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios2.png" style="width: 388px; height: 164px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1761.Minimum%20Degree%20of%20a%20Connected%20Trio%20in%20a%20Graph/images/trios2.png" style="width: 388px; height: 164px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,3],[4,1],[4,3],[2,5],[5,6],[6,7],[7,5],[2,6]]
 <strong>Output:</strong> 0
diff --git a/solution/1700-1799/1765.Map of Highest Peak/README.md b/solution/1700-1799/1765.Map of Highest Peak/README.md
index e2860ebfe51c5..87abc9ef48528 100644
--- a/solution/1700-1799/1765.Map of Highest Peak/README.md	
+++ b/solution/1700-1799/1765.Map of Highest Peak/README.md	
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82045-am.png" style="width: 220px; height: 219px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82045-am.png" style="width: 220px; height: 219px;" /></strong></p>
 
 <pre>
 <b>输入：</b>isWater = [[0,1],[0,0]]
@@ -40,7 +40,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82050-am.png" style="width: 300px; height: 296px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82050-am.png" style="width: 300px; height: 296px;" /></strong></p>
 
 <pre>
 <b>输入：</b>isWater = [[0,0,1],[1,0,0],[0,0,0]]
diff --git a/solution/1700-1799/1765.Map of Highest Peak/README_EN.md b/solution/1700-1799/1765.Map of Highest Peak/README_EN.md
index f955db1fec811..15e5b15a1cca9 100644
--- a/solution/1700-1799/1765.Map of Highest Peak/README_EN.md	
+++ b/solution/1700-1799/1765.Map of Highest Peak/README_EN.md	
@@ -26,7 +26,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82045-am.png" style="width: 220px; height: 219px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82045-am.png" style="width: 220px; height: 219px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> isWater = [[0,1],[0,0]]
@@ -37,7 +37,7 @@ The blue cell is the water cell, and the green cells are the land cells.
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82050-am.png" style="width: 300px; height: 296px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1765.Map%20of%20Highest%20Peak/images/screenshot-2021-01-11-at-82050-am.png" style="width: 300px; height: 296px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> isWater = [[0,0,1],[1,0,0],[0,0,0]]
diff --git a/solution/1700-1799/1766.Tree of Coprimes/README.md b/solution/1700-1799/1766.Tree of Coprimes/README.md
index 196ff293b5847..ae8c156254fef 100644
--- a/solution/1700-1799/1766.Tree of Coprimes/README.md	
+++ b/solution/1700-1799/1766.Tree of Coprimes/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram.png" style="width: 191px; height: 281px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram.png" style="width: 191px; height: 281px;" /></strong></p>
 
 <pre>
 <b>输入：</b>nums = [2,3,3,2], edges = [[0,1],[1,2],[1,3]]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram1.png" style="width: 441px; height: 291px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram1.png" style="width: 441px; height: 291px;" /></p>
 
 <pre>
 <strong>输入：</strong>nums = [5,6,10,2,3,6,15], edges = [[0,1],[0,2],[1,3],[1,4],[2,5],[2,6]]
diff --git a/solution/1700-1799/1766.Tree of Coprimes/README_EN.md b/solution/1700-1799/1766.Tree of Coprimes/README_EN.md
index 0f4b7b99c7ae7..4c173ed48cb83 100644
--- a/solution/1700-1799/1766.Tree of Coprimes/README_EN.md	
+++ b/solution/1700-1799/1766.Tree of Coprimes/README_EN.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram.png" style="width: 191px; height: 281px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram.png" style="width: 191px; height: 281px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> nums = [2,3,3,2], edges = [[0,1],[1,2],[1,3]]
@@ -33,7 +33,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram1.png" style="width: 441px; height: 291px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1766.Tree%20of%20Coprimes/images/untitled-diagram1.png" style="width: 441px; height: 291px;" /></p>
 
 <pre>
 <strong>Input:</strong> nums = [5,6,10,2,3,6,15], edges = [[0,1],[0,2],[1,3],[1,4],[2,5],[2,6]]
diff --git a/solution/1700-1799/1782.Count Pairs Of Nodes/README.md b/solution/1700-1799/1782.Count Pairs Of Nodes/README.md
index 74de32b4f89a2..0bbba85eeff64 100644
--- a/solution/1700-1799/1782.Count Pairs Of Nodes/README.md	
+++ b/solution/1700-1799/1782.Count Pairs Of Nodes/README.md	
@@ -22,7 +22,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1782.Count%20Pairs%20Of%20Nodes/images/1614828447-GMnLVg-image.png" style="width: 310px; height: 278px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1782.Count%20Pairs%20Of%20Nodes/images/1614828447-GMnLVg-image.png" style="width: 310px; height: 278px;" />
 <pre>
 <b>输入：</b>n = 4, edges = [[1,2],[2,4],[1,3],[2,3],[2,1]], queries = [2,3]
 <b>输出：</b>[6,5]
diff --git a/solution/1700-1799/1782.Count Pairs Of Nodes/README_EN.md b/solution/1700-1799/1782.Count Pairs Of Nodes/README_EN.md
index f2c9ab023f59b..88142f7481fa6 100644
--- a/solution/1700-1799/1782.Count Pairs Of Nodes/README_EN.md	
+++ b/solution/1700-1799/1782.Count Pairs Of Nodes/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1782.Count%20Pairs%20Of%20Nodes/images/winword_2021-06-08_00-58-39.png" style="width: 529px; height: 305px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1782.Count%20Pairs%20Of%20Nodes/images/winword_2021-06-08_00-58-39.png" style="width: 529px; height: 305px;" />
 <pre>
 <strong>Input:</strong> n = 4, edges = [[1,2],[2,4],[1,3],[2,3],[2,1]], queries = [2,3]
 <strong>Output:</strong> [6,5]
diff --git a/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README.md b/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README.md
index 63297ff063ea2..1f089069862b8 100644
--- a/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README.md	
+++ b/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex1.png" style="width: 351px; height: 341px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex1.png" style="width: 351px; height: 341px;" />
 <pre>
 <strong>输入：</strong>n = 5, edges = [[1,2,3],[1,3,3],[2,3,1],[1,4,2],[5,2,2],[3,5,1],[5,4,10]]
 <strong>输出：</strong>3
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex22.png" style="width: 356px; height: 401px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex22.png" style="width: 356px; height: 401px;" />
 <pre>
 <strong>输入：</strong>n = 7, edges = [[1,3,1],[4,1,2],[7,3,4],[2,5,3],[5,6,1],[6,7,2],[7,5,3],[2,6,4]]
 <strong>输出：</strong>1
diff --git a/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README_EN.md b/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README_EN.md
index 979ba7e16e7cf..106f6505ce147 100644
--- a/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README_EN.md	
+++ b/solution/1700-1799/1786.Number of Restricted Paths From First to Last Node/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex1.png" style="width: 351px; height: 341px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex1.png" style="width: 351px; height: 341px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[1,2,3],[1,3,3],[2,3,1],[1,4,2],[5,2,2],[3,5,1],[5,4,10]]
 <strong>Output:</strong> 3
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex22.png" style="width: 356px; height: 401px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1786.Number%20of%20Restricted%20Paths%20From%20First%20to%20Last%20Node/images/restricted_paths_ex22.png" style="width: 356px; height: 401px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,3,1],[4,1,2],[7,3,4],[2,5,3],[5,6,1],[6,7,2],[7,5,3],[2,6,4]]
 <strong>Output:</strong> 1
diff --git a/solution/1700-1799/1791.Find Center of Star Graph/README.md b/solution/1700-1799/1791.Find Center of Star Graph/README.md
index 648c12eee9637..15ad168464ff7 100644
--- a/solution/1700-1799/1791.Find Center of Star Graph/README.md	
+++ b/solution/1700-1799/1791.Find Center of Star Graph/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1791.Find%20Center%20of%20Star%20Graph/images/star_graph.png" style="width: 331px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1791.Find%20Center%20of%20Star%20Graph/images/star_graph.png" style="width: 331px; height: 321px;" />
 <pre>
 <strong>输入：</strong>edges = [[1,2],[2,3],[4,2]]
 <strong>输出：</strong>2
diff --git a/solution/1700-1799/1791.Find Center of Star Graph/README_EN.md b/solution/1700-1799/1791.Find Center of Star Graph/README_EN.md
index 048832bb3b361..4d75665684ab4 100644
--- a/solution/1700-1799/1791.Find Center of Star Graph/README_EN.md	
+++ b/solution/1700-1799/1791.Find Center of Star Graph/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1791.Find%20Center%20of%20Star%20Graph/images/star_graph.png" style="width: 331px; height: 321px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1791.Find%20Center%20of%20Star%20Graph/images/star_graph.png" style="width: 331px; height: 321px;" />
 <pre>
 <strong>Input:</strong> edges = [[1,2],[2,3],[4,2]]
 <strong>Output:</strong> 2
diff --git a/solution/1700-1799/1797.Design Authentication Manager/README.md b/solution/1700-1799/1797.Design Authentication Manager/README.md
index fbf7a3383efef..08066d39ea37a 100644
--- a/solution/1700-1799/1797.Design Authentication Manager/README.md	
+++ b/solution/1700-1799/1797.Design Authentication Manager/README.md	
@@ -22,7 +22,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1797.Design%20Authentication%20Manager/images/copy-of-pc68_q2.png" style="width: 500px; height: 287px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1797.Design%20Authentication%20Manager/images/copy-of-pc68_q2.png" style="width: 500px; height: 287px;" />
 <pre>
 <strong>输入：</strong>
 ["AuthenticationManager", "<code>renew</code>", "generate", "<code>countUnexpiredTokens</code>", "generate", "<code>renew</code>", "<code>renew</code>", "<code>countUnexpiredTokens</code>"]
diff --git a/solution/1700-1799/1797.Design Authentication Manager/README_EN.md b/solution/1700-1799/1797.Design Authentication Manager/README_EN.md
index 283602ed8de76..7155479fc586c 100644
--- a/solution/1700-1799/1797.Design Authentication Manager/README_EN.md	
+++ b/solution/1700-1799/1797.Design Authentication Manager/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1797.Design%20Authentication%20Manager/images/copy-of-pc68_q2.png" style="width: 500px; height: 287px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1700-1799/1797.Design%20Authentication%20Manager/images/copy-of-pc68_q2.png" style="width: 500px; height: 287px;" />
 <pre>
 <strong>Input</strong>
 [&quot;AuthenticationManager&quot;, &quot;<code>renew</code>&quot;, &quot;generate&quot;, &quot;<code>countUnexpiredTokens</code>&quot;, &quot;generate&quot;, &quot;<code>renew</code>&quot;, &quot;<code>renew</code>&quot;, &quot;<code>countUnexpiredTokens</code>&quot;]
diff --git a/solution/1800-1899/1801.Number of Orders in the Backlog/README.md b/solution/1800-1899/1801.Number of Orders in the Backlog/README.md
index 8c0f75a97c1d6..b50c34818c198 100644
--- a/solution/1800-1899/1801.Number of Orders in the Backlog/README.md	
+++ b/solution/1800-1899/1801.Number of Orders in the Backlog/README.md	
@@ -29,7 +29,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex1.png" style="width: 450px; height: 479px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex1.png" style="width: 450px; height: 479px;" />
 <pre>
 <strong>输入：</strong>orders = [[10,5,0],[15,2,1],[25,1,1],[30,4,0]]
 <strong>输出：</strong>6
@@ -42,7 +42,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex2.png" style="width: 450px; height: 584px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex2.png" style="width: 450px; height: 584px;" />
 <pre>
 <strong>输入：</strong>orders = [[7,1000000000,1],[15,3,0],[5,999999995,0],[5,1,1]]
 <strong>输出：</strong>999999984
diff --git a/solution/1800-1899/1801.Number of Orders in the Backlog/README_EN.md b/solution/1800-1899/1801.Number of Orders in the Backlog/README_EN.md
index b5e38d04666d0..1849e9d4a5825 100644
--- a/solution/1800-1899/1801.Number of Orders in the Backlog/README_EN.md	
+++ b/solution/1800-1899/1801.Number of Orders in the Backlog/README_EN.md	
@@ -29,7 +29,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex1.png" style="width: 450px; height: 479px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex1.png" style="width: 450px; height: 479px;" />
 
 <pre>
 
@@ -53,7 +53,7 @@ Finally, the backlog has 5 buy orders with price 10, and 1 buy order with price
 
 <p><strong>Example 2:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex2.png" style="width: 450px; height: 584px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1801.Number%20of%20Orders%20in%20the%20Backlog/images/ex2.png" style="width: 450px; height: 584px;" />
 
 <pre>
 
diff --git a/solution/1800-1899/1812.Determine Color of a Chessboard Square/README.md b/solution/1800-1899/1812.Determine Color of a Chessboard Square/README.md
index 79b9eda6695c4..bfc808b9f7bf7 100644
--- a/solution/1800-1899/1812.Determine Color of a Chessboard Square/README.md	
+++ b/solution/1800-1899/1812.Determine Color of a Chessboard Square/README.md	
@@ -8,7 +8,7 @@
 
 <p>给你一个坐标 <code>coordinates</code> ，它是一个字符串，表示国际象棋棋盘中一个格子的坐标。下图是国际象棋棋盘示意图。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/images/chessboard.png" style="width: 400px; height: 396px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/images/chessboard.png" style="width: 400px; height: 396px;" /></p>
 
 <p>如果所给格子的颜色是白色，请你返回 <code>true</code>，如果是黑色，请返回 <code>false</code> 。</p>
 
diff --git a/solution/1800-1899/1812.Determine Color of a Chessboard Square/README_EN.md b/solution/1800-1899/1812.Determine Color of a Chessboard Square/README_EN.md
index 922cb9d2f91b6..5598e3e9b26a1 100644
--- a/solution/1800-1899/1812.Determine Color of a Chessboard Square/README_EN.md	
+++ b/solution/1800-1899/1812.Determine Color of a Chessboard Square/README_EN.md	
@@ -6,7 +6,7 @@
 
 <p>You are given <code>coordinates</code>, a string that represents the coordinates of a square of the chessboard. Below is a chessboard for your reference.</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/images/screenshot-2021-02-20-at-22159-pm.png" style="width: 400px; height: 396px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1812.Determine%20Color%20of%20a%20Chessboard%20Square/images/screenshot-2021-02-20-at-22159-pm.png" style="width: 400px; height: 396px;" /></p>
 
 <p>Return <code>true</code><em> if the square is white, and </em><code>false</code><em> if the square is black</em>.</p>
 
diff --git a/solution/1800-1899/1819.Number of Different Subsequences GCDs/README.md b/solution/1800-1899/1819.Number of Different Subsequences GCDs/README.md
index eab49def50f72..5467bb7e0b98a 100644
--- a/solution/1800-1899/1819.Number of Different Subsequences GCDs/README.md	
+++ b/solution/1800-1899/1819.Number of Different Subsequences GCDs/README.md	
@@ -25,7 +25,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1819.Number%20of%20Different%20Subsequences%20GCDs/images/image-1.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1819.Number%20of%20Different%20Subsequences%20GCDs/images/image-1.png" />
 <pre>
 <strong>输入：</strong>nums = [6,10,3]
 <strong>输出：</strong>5
diff --git a/solution/1800-1899/1819.Number of Different Subsequences GCDs/README_EN.md b/solution/1800-1899/1819.Number of Different Subsequences GCDs/README_EN.md
index 7276795059cc4..805c313650581 100644
--- a/solution/1800-1899/1819.Number of Different Subsequences GCDs/README_EN.md	
+++ b/solution/1800-1899/1819.Number of Different Subsequences GCDs/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1819.Number%20of%20Different%20Subsequences%20GCDs/images/image-1.png" style="width: 149px; height: 309px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1819.Number%20of%20Different%20Subsequences%20GCDs/images/image-1.png" style="width: 149px; height: 309px;" />
 <pre>
 <strong>Input:</strong> nums = [6,10,3]
 <strong>Output:</strong> 5
diff --git a/solution/1800-1899/1823.Find the Winner of the Circular Game/README.md b/solution/1800-1899/1823.Find the Winner of the Circular Game/README.md
index cb2351942083b..7c2f920122550 100644
--- a/solution/1800-1899/1823.Find the Winner of the Circular Game/README.md	
+++ b/solution/1800-1899/1823.Find the Winner of the Circular Game/README.md	
@@ -23,7 +23,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1823.Find%20the%20Winner%20of%20the%20Circular%20Game/images/ic234-q2-ex11.png" style="width: 500px; height: 345px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1823.Find%20the%20Winner%20of%20the%20Circular%20Game/images/ic234-q2-ex11.png" style="width: 500px; height: 345px;" />
 <pre>
 <strong>输入：</strong>n = 5, k = 2
 <strong>输出：</strong>3
diff --git a/solution/1800-1899/1823.Find the Winner of the Circular Game/README_EN.md b/solution/1800-1899/1823.Find the Winner of the Circular Game/README_EN.md
index 163a40bb2695b..22939b8f2a39f 100644
--- a/solution/1800-1899/1823.Find the Winner of the Circular Game/README_EN.md	
+++ b/solution/1800-1899/1823.Find the Winner of the Circular Game/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1823.Find%20the%20Winner%20of%20the%20Circular%20Game/images/ic234-q2-ex11.png" style="width: 500px; height: 345px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1823.Find%20the%20Winner%20of%20the%20Circular%20Game/images/ic234-q2-ex11.png" style="width: 500px; height: 345px;" />
 
 <pre>
 
diff --git a/solution/1800-1899/1824.Minimum Sideway Jumps/README.md b/solution/1800-1899/1824.Minimum Sideway Jumps/README.md
index 7a2ac8d45ad41..1d2c848c6ae4a 100644
--- a/solution/1800-1899/1824.Minimum Sideway Jumps/README.md	
+++ b/solution/1800-1899/1824.Minimum Sideway Jumps/README.md	
@@ -27,7 +27,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex1.png" style="width: 500px; height: 244px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex1.png" style="width: 500px; height: 244px;" />
 <pre>
 <b>输入：</b>obstacles = [0,1,2,3,0]
 <b>输出：</b>2 
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex2.png" style="width: 500px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex2.png" style="width: 500px; height: 196px;" />
 <pre>
 <b>输入：</b>obstacles = [0,1,1,3,3,0]
 <b>输出：</b>0
@@ -44,7 +44,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex3.png" style="width: 500px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex3.png" style="width: 500px; height: 196px;" />
 <pre>
 <b>输入：</b>obstacles = [0,2,1,0,3,0]
 <b>输出：</b>2
diff --git a/solution/1800-1899/1824.Minimum Sideway Jumps/README_EN.md b/solution/1800-1899/1824.Minimum Sideway Jumps/README_EN.md
index 042c18917dd98..a3b98f3809e92 100644
--- a/solution/1800-1899/1824.Minimum Sideway Jumps/README_EN.md	
+++ b/solution/1800-1899/1824.Minimum Sideway Jumps/README_EN.md	
@@ -24,7 +24,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex1.png" style="width: 500px; height: 244px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex1.png" style="width: 500px; height: 244px;" />
 <pre>
 <strong>Input:</strong> obstacles = [0,1,2,3,0]
 <strong>Output:</strong> 2 
@@ -33,7 +33,7 @@ Note that the frog can jump over obstacles only when making side jumps (as shown
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex2.png" style="width: 500px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex2.png" style="width: 500px; height: 196px;" />
 <pre>
 <strong>Input:</strong> obstacles = [0,1,1,3,3,0]
 <strong>Output:</strong> 0
@@ -41,7 +41,7 @@ Note that the frog can jump over obstacles only when making side jumps (as shown
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex3.png" style="width: 500px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1824.Minimum%20Sideway%20Jumps/images/ic234-q3-ex3.png" style="width: 500px; height: 196px;" />
 <pre>
 <strong>Input:</strong> obstacles = [0,2,1,0,3,0]
 <strong>Output:</strong> 2
diff --git a/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README.md b/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README.md
index 12f9f32856e63..f6d26b9cf2dc6 100644
--- a/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README.md	
+++ b/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README.md	
@@ -17,7 +17,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-34-16.png" style="width: 500px; height: 418px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-34-16.png" style="width: 500px; height: 418px;">
 <pre><b>输入：</b>points = [[1,3],[3,3],[5,3],[2,2]], queries = [[2,3,1],[4,3,1],[1,1,2]]
 <b>输出：</b>[3,2,2]
 <b>解释：</b>所有的点和圆如上图所示。
@@ -25,7 +25,7 @@ queries[0] 是绿色的圆，queries[1] 是红色的圆，queries[2] 是蓝色
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-42-07.png" style="width: 500px; height: 390px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-42-07.png" style="width: 500px; height: 390px;">
 <pre><b>输入：</b>points = [[1,1],[2,2],[3,3],[4,4],[5,5]], queries = [[1,2,2],[2,2,2],[4,3,2],[4,3,3]]
 <b>输出：</b>[2,3,2,4]
 <b>解释：</b>所有的点和圆如上图所示。
diff --git a/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README_EN.md b/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README_EN.md
index c1a6c9897b562..66d6ec20bd4ec 100644
--- a/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README_EN.md	
+++ b/solution/1800-1899/1828.Queries on Number of Points Inside a Circle/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-34-16.png" style="width: 500px; height: 418px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-34-16.png" style="width: 500px; height: 418px;" />
 <pre>
 <strong>Input:</strong> points = [[1,3],[3,3],[5,3],[2,2]], queries = [[2,3,1],[4,3,1],[1,1,2]]
 <strong>Output:</strong> [3,2,2]
@@ -23,7 +23,7 @@ queries[0] is the green circle, queries[1] is the red circle, and queries[2] is
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-42-07.png" style="width: 500px; height: 390px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1828.Queries%20on%20Number%20of%20Points%20Inside%20a%20Circle/images/chrome_2021-03-25_22-42-07.png" style="width: 500px; height: 390px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[2,2],[3,3],[4,4],[5,5]], queries = [[1,2,2],[2,2,2],[4,3,2],[4,3,3]]
 <strong>Output:</strong> [2,3,2,4]
diff --git a/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README.md b/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README.md
index 402ce74ae5858..ffa8489791da5 100644
--- a/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README.md	
+++ b/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README.md	
@@ -13,21 +13,21 @@
 <p> </p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list.jpg" style="width: 422px; height: 222px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list.jpg" style="width: 422px; height: 222px;">
 <pre><strong>输入:</strong> head = [1,2,3,2]
 <strong>输出:</strong> [1,3]
 <strong>解释:</strong> 2 在链表中出现了两次，所以所有的 2 都需要被删除。删除了所有的 2 之后，我们还剩下 [1,3] 。
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-1.jpg" style="width: 422px; height: 151px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-1.jpg" style="width: 422px; height: 151px;">
 <pre><strong>输入:</strong> head = [2,1,1,2]
 <strong>输出:</strong> []
 <strong>解释:</strong> 2 和 1 都出现了两次。所有元素都需要被删除。
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-2.jpg" style="width: 500px; height: 142px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-2.jpg" style="width: 500px; height: 142px;">
 <pre><strong>输入:</strong> head = [3,2,2,1,3,2,4]
 <strong>输出:</strong> [1,4]
 <strong>解释: </strong>3 出现了两次，且 2 出现了三次。移除了所有的 3 和 2 后，我们还剩下 [1,4] 。
diff --git a/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README_EN.md b/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README_EN.md
index 378b4d0ff5e9b..59ae63178dbc3 100644
--- a/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README_EN.md	
+++ b/solution/1800-1899/1836.Remove Duplicates From an Unsorted Linked List/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list.jpg" style="width: 422px; height: 222px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list.jpg" style="width: 422px; height: 222px;" />
 
 <pre>
 
@@ -26,7 +26,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-1.jpg" style="width: 422px; height: 151px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-1.jpg" style="width: 422px; height: 151px;" />
 
 <pre>
 
@@ -40,7 +40,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-2.jpg" style="width: 500px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1836.Remove%20Duplicates%20From%20an%20Unsorted%20Linked%20List/images/tmp-linked-list-2.jpg" style="width: 500px; height: 142px;" />
 
 <pre>
 
diff --git a/solution/1800-1899/1840.Maximum Building Height/README.md b/solution/1800-1899/1840.Maximum Building Height/README.md
index 497f5e29ff0e3..e087aed4846a1 100644
--- a/solution/1800-1899/1840.Maximum Building Height/README.md	
+++ b/solution/1800-1899/1840.Maximum Building Height/README.md	
@@ -25,7 +25,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex1-1.png" style="width: 400px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex1-1.png" style="width: 400px; height: 253px;" />
 <pre>
 <b>输入：</b>n = 5, restrictions = [[2,1],[4,1]]
 <b>输出：</b>2
@@ -33,7 +33,7 @@
 我们可以使建筑高度分别为 [0,1,2,1,2] ，最高建筑的高度为 2 。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex2.png" style="width: 500px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex2.png" style="width: 500px; height: 269px;" />
 <pre>
 <b>输入：</b>n = 6, restrictions = []
 <b>输出：</b>5
@@ -42,7 +42,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex3.png" style="width: 500px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex3.png" style="width: 500px; height: 187px;" />
 <pre>
 <b>输入：</b>n = 10, restrictions = [[5,3],[2,5],[7,4],[10,3]]
 <b>输出：</b>5
diff --git a/solution/1800-1899/1840.Maximum Building Height/README_EN.md b/solution/1800-1899/1840.Maximum Building Height/README_EN.md
index 76353ab1590e0..8290778b0d4c6 100644
--- a/solution/1800-1899/1840.Maximum Building Height/README_EN.md	
+++ b/solution/1800-1899/1840.Maximum Building Height/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex1-1.png" style="width: 400px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex1-1.png" style="width: 400px; height: 253px;" />
 <pre>
 <strong>Input:</strong> n = 5, restrictions = [[2,1],[4,1]]
 <strong>Output:</strong> 2
@@ -30,7 +30,7 @@
 We can build the buildings with heights [0,1,2,1,2], and the tallest building has a height of 2.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex2.png" style="width: 500px; height: 269px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex2.png" style="width: 500px; height: 269px;" />
 <pre>
 <strong>Input:</strong> n = 6, restrictions = []
 <strong>Output:</strong> 5
@@ -39,7 +39,7 @@ We can build the buildings with heights [0,1,2,3,4,5], and the tallest building
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex3.png" style="width: 500px; height: 187px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1840.Maximum%20Building%20Height/images/ic236-q4-ex3.png" style="width: 500px; height: 187px;" />
 <pre>
 <strong>Input:</strong> n = 10, restrictions = [[5,3],[2,5],[7,4],[10,3]]
 <strong>Output:</strong> 5
diff --git a/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README.md b/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README.md
index ecd01dc7127fc..2fdc4f0e16603 100644
--- a/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README.md	
+++ b/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet1.png" style="width: 400px; height: 182px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet1.png" style="width: 400px; height: 182px;"></p>
 
 <pre><b>输入：</b>colors = "abaca", edges = [[0,1],[0,2],[2,3],[3,4]]
 <b>输出：</b>3
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet2.png" style="width: 85px; height: 85px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet2.png" style="width: 85px; height: 85px;"></p>
 
 <pre><b>输入：</b>colors = "a", edges = [[0,0]]
 <b>输出：</b>-1
diff --git a/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README_EN.md b/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README_EN.md
index 7208f6e9c90de..b37e9bd9d6c10 100644
--- a/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README_EN.md	
+++ b/solution/1800-1899/1857.Largest Color Value in a Directed Graph/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet1.png" style="width: 400px; height: 182px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet1.png" style="width: 400px; height: 182px;" /></p>
 
 <pre>
 
@@ -30,7 +30,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet2.png" style="width: 85px; height: 85px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1857.Largest%20Color%20Value%20in%20a%20Directed%20Graph/images/leet2.png" style="width: 85px; height: 85px;" /></p>
 
 <pre>
 
diff --git a/solution/1800-1899/1861.Rotating the Box/README.md b/solution/1800-1899/1861.Rotating the Box/README.md
index 5ec13a4d2ec4c..e75239d7c8848 100644
--- a/solution/1800-1899/1861.Rotating the Box/README.md	
+++ b/solution/1800-1899/1861.Rotating the Box/README.md	
@@ -24,7 +24,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcodewithstones.png" style="width: 300px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcodewithstones.png" style="width: 300px; height: 150px;"></p>
 
 <pre><b>输入：</b>box = [["#",".","#"]]
 <b>输出：</b>[["."],
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode2withstones.png" style="width: 375px; height: 195px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode2withstones.png" style="width: 375px; height: 195px;"></p>
 
 <pre><b>输入：</b>box = [["#",".","*","."],
             ["#","#","*","."]]
@@ -46,7 +46,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode3withstone.png" style="width: 400px; height: 218px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode3withstone.png" style="width: 400px; height: 218px;"></p>
 
 <pre><b>输入：</b>box = [["#","#","*",".","*","."],
             ["#","#","#","*",".","."],
diff --git a/solution/1800-1899/1861.Rotating the Box/README_EN.md b/solution/1800-1899/1861.Rotating the Box/README_EN.md
index a711790e2d018..38919a29e20a5 100644
--- a/solution/1800-1899/1861.Rotating the Box/README_EN.md	
+++ b/solution/1800-1899/1861.Rotating the Box/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcodewithstones.png" style="width: 300px; height: 150px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcodewithstones.png" style="width: 300px; height: 150px;" /></p>
 
 <pre>
 
@@ -38,7 +38,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode2withstones.png" style="width: 375px; height: 195px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode2withstones.png" style="width: 375px; height: 195px;" /></p>
 
 <pre>
 
@@ -58,7 +58,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode3withstone.png" style="width: 400px; height: 218px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1861.Rotating%20the%20Box/images/rotatingtheboxleetcode3withstone.png" style="width: 400px; height: 218px;" /></p>
 
 <pre>
 
diff --git a/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README.md b/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README.md
index 0e0a155dae537..ab6c446a73a9a 100644
--- a/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README.md	
+++ b/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README.md	
@@ -9,7 +9,7 @@
 <p>给你一个 <code>m x n</code> 的整数矩阵 <code>grid</code> 。</p>
 
 <p><strong>菱形和</strong> 指的是 <code>grid</code> 中一个正菱形 <strong>边界</strong> 上的元素之和。本题中的菱形必须为正方形旋转45度，且四个角都在一个格子当中。下图是四个可行的菱形，每个菱形和应该包含的格子都用了相应颜色标注在图中。</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-desc-2.png" style="width: 385px; height: 385px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-desc-2.png" style="width: 385px; height: 385px;" />
 <p> </p>
 
 <p>注意，菱形可以是一个面积为 0 的区域，如上图中右下角的紫色菱形所示。</p>
@@ -19,7 +19,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex1.png" style="width: 360px; height: 361px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex1.png" style="width: 360px; height: 361px;" />
 <pre>
 <b>输入：</b>grid = [[3,4,5,1,3],[3,3,4,2,3],[20,30,200,40,10],[1,5,5,4,1],[4,3,2,2,5]]
 <b>输出：</b>[228,216,211]
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex2.png" style="width: 217px; height: 217px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex2.png" style="width: 217px; height: 217px;" />
 <pre>
 <b>输入：</b>grid = [[1,2,3],[4,5,6],[7,8,9]]
 <b>输出：</b>[20,9,8]
diff --git a/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README_EN.md b/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README_EN.md
index bb9604f6bf6d8..3b8ed49f80f40 100644
--- a/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README_EN.md	
+++ b/solution/1800-1899/1878.Get Biggest Three Rhombus Sums in a Grid/README_EN.md	
@@ -7,14 +7,14 @@
 <p>You are given an <code>m x n</code> integer matrix <code>grid</code>​​​.</p>
 
 <p>A <strong>rhombus sum</strong> is the sum of the elements that form <strong>the</strong> <strong>border</strong> of a regular rhombus shape in <code>grid</code>​​​. The rhombus must have the shape of a square rotated 45 degrees with each of the corners centered in a grid cell. Below is an image of four valid rhombus shapes with the corresponding colored cells that should be included in each <strong>rhombus sum</strong>:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-desc-2.png" style="width: 385px; height: 385px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-desc-2.png" style="width: 385px; height: 385px;" />
 <p>Note that the rhombus can have an area of 0, which is depicted by the purple rhombus in the bottom right corner.</p>
 
 <p>Return <em>the biggest three <strong>distinct rhombus sums</strong> in the </em><code>grid</code><em> in <strong>descending order</strong></em><em>. If there are less than three distinct values, return all of them</em>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex1.png" style="width: 360px; height: 361px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex1.png" style="width: 360px; height: 361px;" />
 <pre>
 <strong>Input:</strong> grid = [[3,4,5,1,3],[3,3,4,2,3],[20,30,200,40,10],[1,5,5,4,1],[4,3,2,2,5]]
 <strong>Output:</strong> [228,216,211]
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex2.png" style="width: 217px; height: 217px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1878.Get%20Biggest%20Three%20Rhombus%20Sums%20in%20a%20Grid/images/pc73-q4-ex2.png" style="width: 217px; height: 217px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2,3],[4,5,6],[7,8,9]]
 <strong>Output:</strong> [20,9,8]
diff --git a/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README.md b/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README.md
index 8b9ea72c41e50..43ce5022fd4b0 100644
--- a/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README.md	
+++ b/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README.md	
@@ -11,7 +11,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid3.png" style="width: 301px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid3.png" style="width: 301px; height: 121px;" />
 <pre>
 <strong>输入：</strong>mat = [[0,1],[1,0]], target = [[1,0],[0,1]]
 <strong>输出：</strong>true
@@ -19,7 +19,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 301px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 301px; height: 121px;" />
 <pre>
 <strong>输入：</strong>mat = [[0,1],[1,1]], target = [[1,0],[0,1]]
 <strong>输出：</strong>false
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 661px; height: 184px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 661px; height: 184px;" />
 <pre>
 <strong>输入：</strong>mat = [[0,0,0],[0,1,0],[1,1,1]], target = [[1,1,1],[0,1,0],[0,0,0]]
 <strong>输出：</strong>true
diff --git a/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README_EN.md b/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README_EN.md
index 2ddbd69dd87ea..6a10b1eb26b01 100644
--- a/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README_EN.md	
+++ b/solution/1800-1899/1886.Determine Whether Matrix Can Be Obtained By Rotation/README_EN.md	
@@ -8,7 +8,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid3.png" style="width: 301px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid3.png" style="width: 301px; height: 121px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,1],[1,0]], target = [[1,0],[0,1]]
 <strong>Output:</strong> true
@@ -16,7 +16,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 301px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 301px; height: 121px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,1],[1,1]], target = [[1,0],[0,1]]
 <strong>Output:</strong> false
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 661px; height: 184px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1886.Determine%20Whether%20Matrix%20Can%20Be%20Obtained%20By%20Rotation/images/grid4.png" style="width: 661px; height: 184px;" />
 <pre>
 <strong>Input:</strong> mat = [[0,0,0],[0,1,0],[1,1,1]], target = [[1,1,1],[0,1,0],[0,0,0]]
 <strong>Output:</strong> true
diff --git a/solution/1800-1899/1895.Largest Magic Square/README.md b/solution/1800-1899/1895.Largest Magic Square/README.md
index 612525057b737..db0e85239d0df 100644
--- a/solution/1800-1899/1895.Largest Magic Square/README.md	
+++ b/solution/1800-1899/1895.Largest Magic Square/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare-grid.jpg" style="width: 413px; height: 335px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare-grid.jpg" style="width: 413px; height: 335px;">
 <pre><b>输入：</b>grid = [[7,1,4,5,6],[2,5,1,6,4],[1,5,4,3,2],[1,2,7,3,4]]
 <b>输出：</b>3
 <b>解释：</b>最大幻方尺寸为 3 。
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare2-grid.jpg" style="width: 333px; height: 255px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare2-grid.jpg" style="width: 333px; height: 255px;">
 <pre><b>输入：</b>grid = [[5,1,3,1],[9,3,3,1],[1,3,3,8]]
 <b>输出：</b>2
 </pre>
diff --git a/solution/1800-1899/1895.Largest Magic Square/README_EN.md b/solution/1800-1899/1895.Largest Magic Square/README_EN.md
index 97611351ca033..c178e354ff0e3 100644
--- a/solution/1800-1899/1895.Largest Magic Square/README_EN.md	
+++ b/solution/1800-1899/1895.Largest Magic Square/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare-grid.jpg" style="width: 413px; height: 335px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare-grid.jpg" style="width: 413px; height: 335px;" />
 <pre>
 <strong>Input:</strong> grid = [[7,1,4,5,6],[2,5,1,6,4],[1,5,4,3,2],[1,2,7,3,4]]
 <strong>Output:</strong> 3
@@ -22,7 +22,7 @@ Every row sum, column sum, and diagonal sum of this magic square is equal to 12.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare2-grid.jpg" style="width: 333px; height: 255px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1800-1899/1895.Largest%20Magic%20Square/images/magicsquare2-grid.jpg" style="width: 333px; height: 255px;" />
 <pre>
 <strong>Input:</strong> grid = [[5,1,3,1],[9,3,3,1],[1,3,3,8]]
 <strong>Output:</strong> 2
diff --git a/solution/1900-1999/1901.Find a Peak Element II/README.md b/solution/1900-1999/1901.Find a Peak Element II/README.md
index e87ef39bdb20f..916223a5d0972 100644
--- a/solution/1900-1999/1901.Find a Peak Element II/README.md	
+++ b/solution/1900-1999/1901.Find a Peak Element II/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/1.png" style="width: 206px; height: 209px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/1.png" style="width: 206px; height: 209px;" /></p>
 
 <pre>
 <strong>输入:</strong> mat = [[1,4],[3,2]]
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/3.png" style="width: 254px; height: 257px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/3.png" style="width: 254px; height: 257px;" /></strong></p>
 
 <pre>
 <strong>输入:</strong> mat = [[10,20,15],[21,30,14],[7,16,32]]
diff --git a/solution/1900-1999/1901.Find a Peak Element II/README_EN.md b/solution/1900-1999/1901.Find a Peak Element II/README_EN.md
index dc3dcf472432b..539d247393202 100644
--- a/solution/1900-1999/1901.Find a Peak Element II/README_EN.md	
+++ b/solution/1900-1999/1901.Find a Peak Element II/README_EN.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/1.png" style="width: 206px; height: 209px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/1.png" style="width: 206px; height: 209px;" /></p>
 
 <pre>
 <strong>Input:</strong> mat = [[1,4],[3,2]]
@@ -25,7 +25,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/3.png" style="width: 254px; height: 257px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1901.Find%20a%20Peak%20Element%20II/images/3.png" style="width: 254px; height: 257px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> mat = [[10,20,15],[21,30,14],[7,16,32]]
diff --git a/solution/1900-1999/1902.Depth of BST Given Insertion Order/README.md b/solution/1900-1999/1902.Depth of BST Given Insertion Order/README.md
index 66ba43840b8a4..0f2df9c9eb8ad 100644
--- a/solution/1900-1999/1902.Depth of BST Given Insertion Order/README.md	
+++ b/solution/1900-1999/1902.Depth of BST Given Insertion Order/README.md	
@@ -30,7 +30,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/1.png" style="width: 624px; height: 154px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/1.png" style="width: 624px; height: 154px;" />
 <pre>
 <strong>输入:</strong> order = [2,1,4,3]
 <strong>输出:</strong> 3
@@ -38,7 +38,7 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/2.png" style="width: 624px; height: 146px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/2.png" style="width: 624px; height: 146px;" />
 <pre>
 <strong>输入:</strong> order = [2,1,3,4]
 <strong>输出:</strong> 3
@@ -46,7 +46,7 @@
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/3.png" style="width: 624px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/3.png" style="width: 624px; height: 225px;" />
 <pre>
 <strong>输入:</strong> order = [1,2,3,4]
 <strong>输出:</strong> 4
diff --git a/solution/1900-1999/1902.Depth of BST Given Insertion Order/README_EN.md b/solution/1900-1999/1902.Depth of BST Given Insertion Order/README_EN.md
index e62678a323f59..f81d03f6cbe22 100644
--- a/solution/1900-1999/1902.Depth of BST Given Insertion Order/README_EN.md	
+++ b/solution/1900-1999/1902.Depth of BST Given Insertion Order/README_EN.md	
@@ -31,7 +31,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/1.png" style="width: 624px; height: 154px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/1.png" style="width: 624px; height: 154px;" />
 
 <pre>
 
@@ -45,7 +45,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/2.png" style="width: 624px; height: 146px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/2.png" style="width: 624px; height: 146px;" />
 
 <pre>
 
@@ -59,7 +59,7 @@
 
 <p><strong>Example 3:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/3.png" style="width: 624px; height: 225px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1902.Depth%20of%20BST%20Given%20Insertion%20Order/images/3.png" style="width: 624px; height: 225px;" />
 
 <pre>
 
diff --git a/solution/1900-1999/1905.Count Sub Islands/README.md b/solution/1900-1999/1905.Count Sub Islands/README.md
index c645536e7f1bb..64c1f517d6e7d 100644
--- a/solution/1900-1999/1905.Count Sub Islands/README.md	
+++ b/solution/1900-1999/1905.Count Sub Islands/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/test1.png" style="width: 493px; height: 205px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/test1.png" style="width: 493px; height: 205px;">
 <pre><b>输入：</b>grid1 = [[1,1,1,0,0],[0,1,1,1,1],[0,0,0,0,0],[1,0,0,0,0],[1,1,0,1,1]], grid2 = [[1,1,1,0,0],[0,0,1,1,1],[0,1,0,0,0],[1,0,1,1,0],[0,1,0,1,0]]
 <b>输出：</b>3
 <strong>解释：</strong>如上图所示，左边为 grid1 ，右边为 grid2 。
@@ -23,7 +23,7 @@ grid2 中标红的 1 区域是子岛屿，总共有 3 个子岛屿。
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/testcasex2.png" style="width: 491px; height: 201px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/testcasex2.png" style="width: 491px; height: 201px;">
 <pre><b>输入：</b>grid1 = [[1,0,1,0,1],[1,1,1,1,1],[0,0,0,0,0],[1,1,1,1,1],[1,0,1,0,1]], grid2 = [[0,0,0,0,0],[1,1,1,1,1],[0,1,0,1,0],[0,1,0,1,0],[1,0,0,0,1]]
 <b>输出：</b>2 
 <strong>解释：</strong>如上图所示，左边为 grid1 ，右边为 grid2 。
diff --git a/solution/1900-1999/1905.Count Sub Islands/README_EN.md b/solution/1900-1999/1905.Count Sub Islands/README_EN.md
index 3adaa75a66ed6..6f3ff4497b74f 100644
--- a/solution/1900-1999/1905.Count Sub Islands/README_EN.md	
+++ b/solution/1900-1999/1905.Count Sub Islands/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/test1.png" style="width: 493px; height: 205px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/test1.png" style="width: 493px; height: 205px;" />
 <pre>
 <strong>Input:</strong> grid1 = [[1,1,1,0,0],[0,1,1,1,1],[0,0,0,0,0],[1,0,0,0,0],[1,1,0,1,1]], grid2 = [[1,1,1,0,0],[0,0,1,1,1],[0,1,0,0,0],[1,0,1,1,0],[0,1,0,1,0]]
 <strong>Output:</strong> 3
@@ -21,7 +21,7 @@ The 1s colored red in grid2 are those considered to be part of a sub-island. The
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/testcasex2.png" style="width: 491px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1905.Count%20Sub%20Islands/images/testcasex2.png" style="width: 491px; height: 201px;" />
 <pre>
 <strong>Input:</strong> grid1 = [[1,0,1,0,1],[1,1,1,1,1],[0,0,0,0,0],[1,1,1,1,1],[1,0,1,0,1]], grid2 = [[0,0,0,0,0],[1,1,1,1,1],[0,1,0,1,0],[0,1,0,1,0],[1,0,0,0,1]]
 <strong>Output:</strong> 2 
diff --git a/solution/1900-1999/1914.Cyclically Rotating a Grid/README.md b/solution/1900-1999/1914.Cyclically Rotating a Grid/README.md
index 53633344997c5..ca9f60e287f41 100644
--- a/solution/1900-1999/1914.Cyclically Rotating a Grid/README.md	
+++ b/solution/1900-1999/1914.Cyclically Rotating a Grid/README.md	
@@ -10,22 +10,22 @@
 
 <p>矩阵由若干层组成，如下图所示，每种颜色代表一层：</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid.png" style="width: 231px; height: 258px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid.png" style="width: 231px; height: 258px;"></p>
 
 <p>矩阵的循环轮转是通过分别循环轮转矩阵中的每一层完成的。在对某一层进行一次循环旋转操作时，层中的每一个元素将会取代其 <strong>逆时针 </strong>方向的相邻元素。轮转示例如下：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/explanation_grid.jpg" style="width: 500px; height: 268px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/explanation_grid.jpg" style="width: 500px; height: 268px;">
 <p>返回执行 <code>k</code> 次循环轮转操作后的矩阵。</p>
 
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/rod2.png" style="width: 421px; height: 191px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/rod2.png" style="width: 421px; height: 191px;">
 <pre><strong>输入：</strong>grid = [[40,10],[30,20]], k = 1
 <strong>输出：</strong>[[10,20],[40,30]]
 <strong>解释：</strong>上图展示了矩阵在执行循环轮转操作时每一步的状态。</pre>
 
 <p><strong>示例 2：</strong></p>
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid5.png" style="width: 231px; height: 262px;"></strong> <strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid6.png" style="width: 231px; height: 262px;"></strong> <strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid7.png" style="width: 231px; height: 262px;"></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid5.png" style="width: 231px; height: 262px;"></strong> <strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid6.png" style="width: 231px; height: 262px;"></strong> <strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid7.png" style="width: 231px; height: 262px;"></strong>
 
 <pre><strong>输入：</strong>grid = [[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]], k = 2
 <strong>输出：</strong>[[3,4,8,12],[2,11,10,16],[1,7,6,15],[5,9,13,14]]
diff --git a/solution/1900-1999/1914.Cyclically Rotating a Grid/README_EN.md b/solution/1900-1999/1914.Cyclically Rotating a Grid/README_EN.md
index 5844416297561..60a5da5df8d6f 100644
--- a/solution/1900-1999/1914.Cyclically Rotating a Grid/README_EN.md	
+++ b/solution/1900-1999/1914.Cyclically Rotating a Grid/README_EN.md	
@@ -8,11 +8,11 @@
 
 <p>The matrix is composed of several layers, which is shown in the below image, where each color is its own layer:</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid.png" style="width: 231px; height: 258px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid.png" style="width: 231px; height: 258px;" /></p>
 
 <p>A cyclic rotation of the matrix is done by cyclically rotating <strong>each layer</strong> in the matrix. To cyclically rotate a layer once, each element in the layer will take the place of the adjacent element in the <strong>counter-clockwise</strong> direction. An example rotation is shown below:</p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/explanation_grid.jpg" style="width: 500px; height: 268px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/explanation_grid.jpg" style="width: 500px; height: 268px;" />
 
 <p>Return <em>the matrix after applying </em><code>k</code> <em>cyclic rotations to it</em>.</p>
 
@@ -20,7 +20,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/rod2.png" style="width: 421px; height: 191px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/rod2.png" style="width: 421px; height: 191px;" />
 
 <pre>
 
@@ -34,7 +34,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid5.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid6.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid7.png" style="width: 231px; height: 262px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid5.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid6.png" style="width: 231px; height: 262px;" /></strong> <strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1914.Cyclically%20Rotating%20a%20Grid/images/ringofgrid7.png" style="width: 231px; height: 262px;" /></strong>
 
 <pre>
 
diff --git a/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README.md b/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README.md
index 722f7ad3327e2..aba24b00ab10a 100644
--- a/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README.md	
+++ b/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d1.jpg" style="width: 200px; height: 212px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d1.jpg" style="width: 200px; height: 212px;" />
 <pre>
 <strong>输入：</strong><code>prevRoom</code> = [-1,0,1]
 <strong>输出：</strong>1
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d2.jpg" style="width: 200px; height: 239px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d2.jpg" style="width: 200px; height: 239px;" /></strong>
 
 <pre>
 <strong>输入：</strong><code>prevRoom</code> = [-1,0,0,1,2]
diff --git a/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README_EN.md b/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README_EN.md
index a871ac5be95b7..7aa48ba3b0381 100644
--- a/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README_EN.md	
+++ b/solution/1900-1999/1916.Count Ways to Build Rooms in an Ant Colony/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p><strong>Example 1:</strong></p>
 
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d1.jpg" style="width: 200px; height: 212px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d1.jpg" style="width: 200px; height: 212px;" />
 
 <pre>
 
@@ -28,7 +28,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d2.jpg" style="width: 200px; height: 239px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1916.Count%20Ways%20to%20Build%20Rooms%20in%20an%20Ant%20Colony/images/d2.jpg" style="width: 200px; height: 239px;" /></strong>
 
 <pre>
 
diff --git a/solution/1900-1999/1924.Erect the Fence II/README.md b/solution/1900-1999/1924.Erect the Fence II/README.md
index 4f33024164d2c..83df459d57392 100644
--- a/solution/1900-1999/1924.Erect the Fence II/README.md	
+++ b/solution/1900-1999/1924.Erect the Fence II/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees1.png" style="width: 510px; height: 501px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees1.png" style="width: 510px; height: 501px;"></strong></p>
 
 <pre><strong>输入:</strong> trees = [[1,1],[2,2],[2,0],[2,4],[3,3],[4,2]]
 <strong>输出:</strong> [2.00000,2.00000,2.00000]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees2.png" style="width: 510px; height: 501px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees2.png" style="width: 510px; height: 501px;"></strong></p>
 
 <pre><strong>输入:</strong> trees = [[1,2],[2,2],[4,2]]
 <strong>输出:</strong> [2.50000,2.00000,1.50000]
diff --git a/solution/1900-1999/1924.Erect the Fence II/README_EN.md b/solution/1900-1999/1924.Erect the Fence II/README_EN.md
index bd17b99c00446..daf2e1a193d78 100644
--- a/solution/1900-1999/1924.Erect the Fence II/README_EN.md	
+++ b/solution/1900-1999/1924.Erect the Fence II/README_EN.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees1.png" style="width: 510px; height: 501px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees1.png" style="width: 510px; height: 501px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> trees = [[1,1],[2,2],[2,0],[2,4],[3,3],[4,2]]
@@ -25,7 +25,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees2.png" style="width: 510px; height: 501px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1924.Erect%20the%20Fence%20II/images/trees2.png" style="width: 510px; height: 501px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> trees = [[1,2],[2,2],[4,2]]
diff --git a/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README.md b/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README.md
index 1d45777105f6b..4a7ef9868f385 100644
--- a/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README.md	
+++ b/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest1-grid.jpg" style="width: 333px; height: 253px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest1-grid.jpg" style="width: 333px; height: 253px;">
 <pre><b>输入：</b>maze = [["+","+",".","+"],[".",".",".","+"],["+","+","+","."]], entrance = [1,2]
 <b>输出：</b>1
 <b>解释：</b>总共有 3 个出口，分别位于 (1,0)，(0,2) 和 (2,3) 。
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearesr2-grid.jpg" style="width: 253px; height: 253px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearesr2-grid.jpg" style="width: 253px; height: 253px;">
 <pre><b>输入：</b>maze = [["+","+","+"],[".",".","."],["+","+","+"]], entrance = [1,0]
 <b>输出：</b>2
 <b>解释：</b>迷宫中只有 1 个出口，在 (1,2) 处。
@@ -38,7 +38,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest3-grid.jpg" style="width: 173px; height: 93px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest3-grid.jpg" style="width: 173px; height: 93px;">
 <pre><b>输入：</b>maze = [[".","+"]], entrance = [0,0]
 <b>输出：</b>-1
 <b>解释：</b>这个迷宫中没有出口。
diff --git a/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README_EN.md b/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README_EN.md
index e420431207094..d47fe3530e24e 100644
--- a/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README_EN.md	
+++ b/solution/1900-1999/1926.Nearest Exit from Entrance in Maze/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest1-grid.jpg" style="width: 333px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest1-grid.jpg" style="width: 333px; height: 253px;" />
 <pre>
 <strong>Input:</strong> maze = [[&quot;+&quot;,&quot;+&quot;,&quot;.&quot;,&quot;+&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;+&quot;],[&quot;+&quot;,&quot;+&quot;,&quot;+&quot;,&quot;.&quot;]], entrance = [1,2]
 <strong>Output:</strong> 1
@@ -25,7 +25,7 @@ Thus, the nearest exit is [0,2], which is 1 step away.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearesr2-grid.jpg" style="width: 253px; height: 253px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearesr2-grid.jpg" style="width: 253px; height: 253px;" />
 <pre>
 <strong>Input:</strong> maze = [[&quot;+&quot;,&quot;+&quot;,&quot;+&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;+&quot;,&quot;+&quot;,&quot;+&quot;]], entrance = [1,0]
 <strong>Output:</strong> 2
@@ -37,7 +37,7 @@ Thus, the nearest exit is [1,2], which is 2 steps away.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest3-grid.jpg" style="width: 173px; height: 93px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1926.Nearest%20Exit%20from%20Entrance%20in%20Maze/images/nearest3-grid.jpg" style="width: 173px; height: 93px;" />
 <pre>
 <strong>Input:</strong> maze = [[&quot;.&quot;,&quot;+&quot;]], entrance = [0,0]
 <strong>Output:</strong> -1
diff --git a/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README.md b/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README.md
index cd52f1482d61d..bfe67a4494fb4 100644
--- a/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README.md	
+++ b/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/leetgraph1-1.png" style="width: 371px; height: 171px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/leetgraph1-1.png" style="width: 371px; height: 171px;" /></p>
 
 <pre>
 <b>输入：</b>maxTime = 30, edges = [[0,1,10],[1,2,10],[2,5,10],[0,3,1],[3,4,10],[4,5,15]], passingFees = [5,1,2,20,20,3]
@@ -28,7 +28,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/copy-of-leetgraph1-1.png" style="width: 371px; height: 171px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/copy-of-leetgraph1-1.png" style="width: 371px; height: 171px;" /></strong></p>
 
 <pre>
 <b>输入：</b>maxTime = 29, edges = [[0,1,10],[1,2,10],[2,5,10],[0,3,1],[3,4,10],[4,5,15]], passingFees = [5,1,2,20,20,3]
diff --git a/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README_EN.md b/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README_EN.md
index 6954248cb7045..ef0b2ccb47907 100644
--- a/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README_EN.md	
+++ b/solution/1900-1999/1928.Minimum Cost to Reach Destination in Time/README_EN.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/leetgraph1-1.png" style="width: 371px; height: 171px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/leetgraph1-1.png" style="width: 371px; height: 171px;" /></p>
 
 <pre>
 <strong>Input:</strong> maxTime = 30, edges = [[0,1,10],[1,2,10],[2,5,10],[0,3,1],[3,4,10],[4,5,15]], passingFees = [5,1,2,20,20,3]
@@ -25,7 +25,7 @@
 
 <p><strong>Example 2:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/copy-of-leetgraph1-1.png" style="width: 371px; height: 171px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1928.Minimum%20Cost%20to%20Reach%20Destination%20in%20Time/images/copy-of-leetgraph1-1.png" style="width: 371px; height: 171px;" /></strong></p>
 
 <pre>
 <strong>Input:</strong> maxTime = 29, edges = [[0,1,10],[1,2,10],[2,5,10],[0,3,1],[3,4,10],[4,5,15]], passingFees = [5,1,2,20,20,3]
diff --git a/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README.md b/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README.md
index a4fc67ce6c371..71ff197a8e287 100644
--- a/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README.md	
+++ b/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README.md	
@@ -13,7 +13,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/colorthegrid.png" style="width: 200px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/colorthegrid.png" style="width: 200px; height: 50px;" />
 <pre>
 <strong>输入：</strong>m = 1, n = 1
 <strong>输出：</strong>3
@@ -21,7 +21,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/copy-of-colorthegrid.png" style="width: 321px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/copy-of-colorthegrid.png" style="width: 321px; height: 121px;" />
 <pre>
 <strong>输入：</strong>m = 1, n = 2
 <strong>输出：</strong>6
diff --git a/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README_EN.md b/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README_EN.md
index 357b801a587a2..fecf88c11a4c8 100644
--- a/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README_EN.md	
+++ b/solution/1900-1999/1931.Painting a Grid With Three Different Colors/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/colorthegrid.png" style="width: 200px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/colorthegrid.png" style="width: 200px; height: 50px;" />
 <pre>
 <strong>Input:</strong> m = 1, n = 1
 <strong>Output:</strong> 3
@@ -18,7 +18,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/copy-of-colorthegrid.png" style="width: 321px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1931.Painting%20a%20Grid%20With%20Three%20Different%20Colors/images/copy-of-colorthegrid.png" style="width: 321px; height: 121px;" />
 <pre>
 <strong>Input:</strong> m = 1, n = 2
 <strong>Output:</strong> 6
diff --git a/solution/1900-1999/1932.Merge BSTs to Create Single BST/README.md b/solution/1900-1999/1932.Merge BSTs to Create Single BST/README.md
index abe5632ce18cc..18cba219ee571 100644
--- a/solution/1900-1999/1932.Merge BSTs to Create Single BST/README.md	
+++ b/solution/1900-1999/1932.Merge BSTs to Create Single BST/README.md	
@@ -28,33 +28,33 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d1.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d1.png" />
 <pre>
 <strong>输入：</strong>trees = [[2,1],[3,2,5],[5,4]]
 <strong>输出：</strong>[3,2,5,1,null,4]
 <strong>解释：</strong>
 第一步操作中，选出 i=1 和 j=0 ，并将 trees[0] 合并到 trees[1] 中。
 删除 trees[0] ，trees = [[3,2,5,1],[5,4]] 。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram.png" />
 在第二步操作中，选出 i=0 和 j=1 ，将 trees[1] 合并到 trees[0] 中。
 删除 trees[1] ，trees = [[3,2,5,1,null,4]] 。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-2.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-2.png" />
 结果树如上图所示，为一棵有效的二叉搜索树，所以返回该树的根节点。</pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d2.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d2.png" />
 <pre>
 <strong>输入：</strong>trees = [[5,3,8],[3,2,6]]
 <strong>输出：</strong>[]
 <strong>解释：</strong>
 选出 i=0 和 j=1 ，然后将 trees[1] 合并到 trees[0] 中。
 删除 trees[1] ，trees = [[5,3,8,2,6]] 。
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-3.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-3.png" />
 结果树如上图所示。仅能执行一次有效的操作，但结果树不是一棵有效的二叉搜索树，所以返回 null 。
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d3.png" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d3.png" />
 <pre>
 <strong>输入：</strong>trees = [[5,4],[3]]
 <strong>输出：</strong>[]
diff --git a/solution/1900-1999/1932.Merge BSTs to Create Single BST/README_EN.md b/solution/1900-1999/1932.Merge BSTs to Create Single BST/README_EN.md
index fcc3cb00e492b..6d13f78a8348f 100644
--- a/solution/1900-1999/1932.Merge BSTs to Create Single BST/README_EN.md	
+++ b/solution/1900-1999/1932.Merge BSTs to Create Single BST/README_EN.md	
@@ -25,33 +25,33 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d1.png" style="width: 450px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d1.png" style="width: 450px; height: 163px;" />
 <pre>
 <strong>Input:</strong> trees = [[2,1],[3,2,5],[5,4]]
 <strong>Output:</strong> [3,2,5,1,null,4]
 <strong>Explanation:</strong>
 In the first operation, pick i=1 and j=0, and merge trees[0] into trees[1].
 Delete trees[0], so trees = [[3,2,5,1],[5,4]].
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram.png" style="width: 450px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram.png" style="width: 450px; height: 181px;" />
 In the second operation, pick i=0 and j=1, and merge trees[1] into trees[0].
 Delete trees[1], so trees = [[3,2,5,1,null,4]].
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-2.png" style="width: 220px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-2.png" style="width: 220px; height: 165px;" />
 The resulting tree, shown above, is a valid BST, so return its root.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d2.png" style="width: 450px; height: 171px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d2.png" style="width: 450px; height: 171px;" />
 <pre>
 <strong>Input:</strong> trees = [[5,3,8],[3,2,6]]
 <strong>Output:</strong> []
 <strong>Explanation:</strong>
 Pick i=0 and j=1 and merge trees[1] into trees[0].
 Delete trees[1], so trees = [[5,3,8,2,6]].
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-3.png" style="width: 240px; height: 196px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/diagram-3.png" style="width: 240px; height: 196px;" />
 The resulting tree is shown above. This is the only valid operation that can be performed, but the resulting tree is not a valid BST, so return null.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d3.png" style="width: 430px; height: 168px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1932.Merge%20BSTs%20to%20Create%20Single%20BST/images/d3.png" style="width: 430px; height: 168px;" />
 <pre>
 <strong>Input:</strong> trees = [[5,4],[3]]
 <strong>Output:</strong> []
diff --git a/solution/1900-1999/1937.Maximum Number of Points with Cost/README.md b/solution/1900-1999/1937.Maximum Number of Points with Cost/README.md
index 7147c2c20fc29..9c2b11a530962 100644
--- a/solution/1900-1999/1937.Maximum Number of Points with Cost/README.md	
+++ b/solution/1900-1999/1937.Maximum Number of Points with Cost/README.md	
@@ -24,7 +24,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-40-26-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-40-26-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
 <pre>
 <b>输入：</b>points = [[1,2,3],[1,5,1],[3,1,1]]
 <b>输出：</b>9
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-42-14-diagram-drawio-diagrams-net.png" style="width: 200px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-42-14-diagram-drawio-diagrams-net.png" style="width: 200px; height: 299px;" />
 <pre>
 <b>输入：</b>points = [[1,5],[2,3],[4,2]]
 <b>输出：</b>11
diff --git a/solution/1900-1999/1937.Maximum Number of Points with Cost/README_EN.md b/solution/1900-1999/1937.Maximum Number of Points with Cost/README_EN.md
index 9cc89ad9db6b5..844360f70168c 100644
--- a/solution/1900-1999/1937.Maximum Number of Points with Cost/README_EN.md	
+++ b/solution/1900-1999/1937.Maximum Number of Points with Cost/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong><strong> </strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-40-26-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-40-26-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> points = [[1,2,3],[1,5,1],[3,1,1]]
 <strong>Output:</strong> 9
@@ -33,7 +33,7 @@ Your final score is 11 - 2 = 9.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-42-14-diagram-drawio-diagrams-net.png" style="width: 200px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1937.Maximum%20Number%20of%20Points%20with%20Cost/images/screenshot-2021-07-12-at-13-42-14-diagram-drawio-diagrams-net.png" style="width: 200px; height: 299px;" />
 <pre>
 <strong>Input:</strong> points = [[1,5],[2,3],[4,2]]
 <strong>Output:</strong> 11
diff --git a/solution/1900-1999/1938.Maximum Genetic Difference Query/README.md b/solution/1900-1999/1938.Maximum Genetic Difference Query/README.md
index ae615f65b7a77..0b9ffa353fe05 100644
--- a/solution/1900-1999/1938.Maximum Genetic Difference Query/README.md	
+++ b/solution/1900-1999/1938.Maximum Genetic Difference Query/README.md	
@@ -15,7 +15,7 @@
 <p> </p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c1.png" style="width: 118px; height: 163px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c1.png" style="width: 118px; height: 163px;">
 <pre><b>输入：</b>parents = [-1,0,1,1], queries = [[0,2],[3,2],[2,5]]
 <b>输出：</b>[2,3,7]
 <strong>解释：</strong>查询数组处理如下：
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c2.png" style="width: 256px; height: 221px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c2.png" style="width: 256px; height: 221px;">
 <pre><b>输入：</b>parents = [3,7,-1,2,0,7,0,2], queries = [[4,6],[1,15],[0,5]]
 <b>输出：</b>[6,14,7]
 <strong>解释：</strong>查询数组处理如下：
diff --git a/solution/1900-1999/1938.Maximum Genetic Difference Query/README_EN.md b/solution/1900-1999/1938.Maximum Genetic Difference Query/README_EN.md
index bdfb5b0307213..4b172e15d6630 100644
--- a/solution/1900-1999/1938.Maximum Genetic Difference Query/README_EN.md	
+++ b/solution/1900-1999/1938.Maximum Genetic Difference Query/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c1.png" style="width: 118px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c1.png" style="width: 118px; height: 163px;" />
 <pre>
 <strong>Input:</strong> parents = [-1,0,1,1], queries = [[0,2],[3,2],[2,5]]
 <strong>Output:</strong> [2,3,7]
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c2.png" style="width: 256px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1938.Maximum%20Genetic%20Difference%20Query/images/c2.png" style="width: 256px; height: 221px;" />
 <pre>
 <strong>Input:</strong> parents = [3,7,-1,2,0,7,0,2], queries = [[4,6],[1,15],[0,5]]
 <strong>Output:</strong> [6,14,7]
diff --git a/solution/1900-1999/1943.Describe the Painting/README.md b/solution/1900-1999/1943.Describe the Painting/README.md
index d6750b73fd1c0..f258f869ffb77 100644
--- a/solution/1900-1999/1943.Describe the Painting/README.md	
+++ b/solution/1900-1999/1943.Describe the Painting/README.md	
@@ -35,7 +35,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/1.png" style="width: 529px; height: 241px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/1.png" style="width: 529px; height: 241px;">
 <pre><b>输入：</b>segments = [[1,4,5],[4,7,7],[1,7,9]]
 <b>输出：</b>[[1,4,14],[4,7,16]]
 <strong>解释：</strong>绘画借故偶可以表示为：
@@ -44,7 +44,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/2.png" style="width: 532px; height: 219px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/2.png" style="width: 532px; height: 219px;">
 <pre><b>输入：</b>segments = [[1,7,9],[6,8,15],[8,10,7]]
 <b>输出：</b>[[1,6,9],[6,7,24],[7,8,15],[8,10,7]]
 <b>解释：</b>绘画结果可以以表示为：
@@ -55,7 +55,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/c1.png" style="width: 529px; height: 289px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/c1.png" style="width: 529px; height: 289px;">
 <pre><b>输入：</b>segments = [[1,4,5],[1,4,7],[4,7,1],[4,7,11]]
 <b>输出：</b>[[1,4,12],[4,7,12]]
 <strong>解释：</strong>绘画结果可以表示为：
diff --git a/solution/1900-1999/1943.Describe the Painting/README_EN.md b/solution/1900-1999/1943.Describe the Painting/README_EN.md
index df0d4905bac3d..5ee4d0d66b257 100644
--- a/solution/1900-1999/1943.Describe the Painting/README_EN.md	
+++ b/solution/1900-1999/1943.Describe the Painting/README_EN.md	
@@ -32,7 +32,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/1.png" style="width: 529px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/1.png" style="width: 529px; height: 241px;" />
 <pre>
 <strong>Input:</strong> segments = [[1,4,5],[4,7,7],[1,7,9]]
 <strong>Output:</strong> [[1,4,14],[4,7,16]]
@@ -42,7 +42,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/2.png" style="width: 532px; height: 219px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/2.png" style="width: 532px; height: 219px;" />
 <pre>
 <strong>Input:</strong> segments = [[1,7,9],[6,8,15],[8,10,7]]
 <strong>Output:</strong> [[1,6,9],[6,7,24],[7,8,15],[8,10,7]]
@@ -54,7 +54,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/c1.png" style="width: 529px; height: 289px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1943.Describe%20the%20Painting/images/c1.png" style="width: 529px; height: 289px;" />
 <pre>
 <strong>Input:</strong> segments = [[1,4,5],[1,4,7],[4,7,1],[4,7,11]]
 <strong>Output:</strong> [[1,4,12],[4,7,12]]
diff --git a/solution/1900-1999/1944.Number of Visible People in a Queue/README.md b/solution/1900-1999/1944.Number of Visible People in a Queue/README.md
index 68c0e79696af0..110b178008617 100644
--- a/solution/1900-1999/1944.Number of Visible People in a Queue/README.md	
+++ b/solution/1900-1999/1944.Number of Visible People in a Queue/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1944.Number%20of%20Visible%20People%20in%20a%20Queue/images/queue-plane.jpg" style="width: 600px; height: 247px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1944.Number%20of%20Visible%20People%20in%20a%20Queue/images/queue-plane.jpg" style="width: 600px; height: 247px;" /></p>
 
 <pre>
 <b>输入：</b>heights = [10,6,8,5,11,9]
diff --git a/solution/1900-1999/1944.Number of Visible People in a Queue/README_EN.md b/solution/1900-1999/1944.Number of Visible People in a Queue/README_EN.md
index 33ecd2eda1a4c..4ca0f009b7c76 100644
--- a/solution/1900-1999/1944.Number of Visible People in a Queue/README_EN.md	
+++ b/solution/1900-1999/1944.Number of Visible People in a Queue/README_EN.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1944.Number%20of%20Visible%20People%20in%20a%20Queue/images/queue-plane.jpg" style="width: 600px; height: 247px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1944.Number%20of%20Visible%20People%20in%20a%20Queue/images/queue-plane.jpg" style="width: 600px; height: 247px;" /></p>
 
 <pre>
 <strong>Input:</strong> heights = [10,6,8,5,11,9]
diff --git a/solution/1900-1999/1948.Delete Duplicate Folders in System/README.md b/solution/1900-1999/1948.Delete Duplicate Folders in System/README.md
index 5721458ca0ce1..4048a6efcca2b 100644
--- a/solution/1900-1999/1948.Delete Duplicate Folders in System/README.md	
+++ b/solution/1900-1999/1948.Delete Duplicate Folders in System/README.md	
@@ -38,7 +38,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder1.jpg" style="width: 200px; height: 218px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder1.jpg" style="width: 200px; height: 218px;" />
 <pre>
 <strong>输入：</strong>paths = [["a"],["c"],["d"],["a","b"],["c","b"],["d","a"]]
 <strong>输出：</strong>[["d"],["d","a"]]
@@ -47,7 +47,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder2.jpg" style="width: 200px; height: 355px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder2.jpg" style="width: 200px; height: 355px;" />
 <pre>
 <strong>输入：</strong>paths = [["a"],["c"],["a","b"],["c","b"],["a","b","x"],["a","b","x","y"],["w"],["w","y"]]
 <strong>输出：</strong>[["c"],["c","b"],["a"],["a","b"]]
@@ -57,7 +57,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder3.jpg" style="width: 200px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder3.jpg" style="width: 200px; height: 201px;" />
 <pre>
 <strong>输入：</strong>paths = [["a","b"],["c","d"],["c"],["a"]]
 <strong>输出：</strong>[["c"],["c","d"],["a"],["a","b"]]
@@ -66,7 +66,7 @@
 </pre>
 
 <p><strong>示例 4：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder4_.jpg" style="width: 300px; height: 290px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder4_.jpg" style="width: 300px; height: 290px;" />
 <pre>
 <strong>输入：</strong>paths = [["a"],["a","x"],["a","x","y"],["a","z"],["b"],["b","x"],["b","x","y"],["b","z"]]
 <strong>输出：</strong>[]
@@ -76,7 +76,7 @@
 </pre>
 
 <p><strong>示例 5：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder5_.jpg" style="width: 300px; height: 282px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder5_.jpg" style="width: 300px; height: 282px;" />
 <pre>
 <strong>输入：</strong>paths = [["a"],["a","x"],["a","x","y"],["a","z"],["b"],["b","x"],["b","x","y"],["b","z"],["b","w"]]
 <strong>输出：</strong>[["b"],["b","w"],["b","z"],["a"],["a","z"]]
diff --git a/solution/1900-1999/1948.Delete Duplicate Folders in System/README_EN.md b/solution/1900-1999/1948.Delete Duplicate Folders in System/README_EN.md
index f52affca5c67f..c5e8fc876068a 100644
--- a/solution/1900-1999/1948.Delete Duplicate Folders in System/README_EN.md	
+++ b/solution/1900-1999/1948.Delete Duplicate Folders in System/README_EN.md	
@@ -35,7 +35,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder1.jpg" style="width: 200px; height: 218px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder1.jpg" style="width: 200px; height: 218px;" />
 <pre>
 <strong>Input:</strong> paths = [[&quot;a&quot;],[&quot;c&quot;],[&quot;d&quot;],[&quot;a&quot;,&quot;b&quot;],[&quot;c&quot;,&quot;b&quot;],[&quot;d&quot;,&quot;a&quot;]]
 <strong>Output:</strong> [[&quot;d&quot;],[&quot;d&quot;,&quot;a&quot;]]
@@ -45,7 +45,7 @@ folder named &quot;b&quot;.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder2.jpg" style="width: 200px; height: 355px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder2.jpg" style="width: 200px; height: 355px;" />
 <pre>
 <strong>Input:</strong> paths = [[&quot;a&quot;],[&quot;c&quot;],[&quot;a&quot;,&quot;b&quot;],[&quot;c&quot;,&quot;b&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;x&quot;],[&quot;a&quot;,&quot;b&quot;,&quot;x&quot;,&quot;y&quot;],[&quot;w&quot;],[&quot;w&quot;,&quot;y&quot;]]
 <strong>Output:</strong> [[&quot;c&quot;],[&quot;c&quot;,&quot;b&quot;],[&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;]]
@@ -55,7 +55,7 @@ Note that folders &quot;/a&quot; and &quot;/c&quot; are identical after the dele
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder3.jpg" style="width: 200px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1948.Delete%20Duplicate%20Folders%20in%20System/images/lc-dupfolder3.jpg" style="width: 200px; height: 201px;" />
 <pre>
 <strong>Input:</strong> paths = [[&quot;a&quot;,&quot;b&quot;],[&quot;c&quot;,&quot;d&quot;],[&quot;c&quot;],[&quot;a&quot;]]
 <strong>Output:</strong> [[&quot;c&quot;],[&quot;c&quot;,&quot;d&quot;],[&quot;a&quot;],[&quot;a&quot;,&quot;b&quot;]]
diff --git a/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README.md b/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README.md
index 7ac03b013f7dd..47a209f80f8f5 100644
--- a/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README.md	
+++ b/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README.md	
@@ -22,7 +22,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1954.Minimum%20Garden%20Perimeter%20to%20Collect%20Enough%20Apples/images/1627790803-qcBKFw-image.png" style="width: 442px; height: 449px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1954.Minimum%20Garden%20Perimeter%20to%20Collect%20Enough%20Apples/images/1627790803-qcBKFw-image.png" style="width: 442px; height: 449px;" />
 <pre>
 <b>输入：</b>neededApples = 1
 <b>输出：</b>8
diff --git a/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README_EN.md b/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README_EN.md
index a1fa9e8bcb11d..6005a297f97ef 100644
--- a/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README_EN.md	
+++ b/solution/1900-1999/1954.Minimum Garden Perimeter to Collect Enough Apples/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1954.Minimum%20Garden%20Perimeter%20to%20Collect%20Enough%20Apples/images/1527_example_1_2.png" style="width: 442px; height: 449px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1954.Minimum%20Garden%20Perimeter%20to%20Collect%20Enough%20Apples/images/1527_example_1_2.png" style="width: 442px; height: 449px;" />
 <pre>
 <strong>Input:</strong> neededApples = 1
 <strong>Output:</strong> 8
diff --git a/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README.md b/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README.md
index 3b0078944ea79..111d0cf7b11d1 100644
--- a/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README.md	
+++ b/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-1.png" style="width: 421px; height: 256px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-1.png" style="width: 421px; height: 256px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>points = [[1,1],[6,1]], k = 2
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>points = [[3,3],[1,2],[9,2]], k = 2
@@ -36,7 +36,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" /></strong></p>
 
 <pre>
 <b>输入：</b>points = [[3,3],[1,2],[9,2]], k = 3
diff --git a/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README_EN.md b/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README_EN.md
index e40b17b407187..24c2a3607e319 100644
--- a/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README_EN.md	
+++ b/solution/1900-1999/1956.Minimum Time For K Virus Variants to Spread/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-1.png" style="width: 421px; height: 256px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-1.png" style="width: 421px; height: 256px;" />
 <pre>
 <strong>Input:</strong> points = [[1,1],[6,1]], k = 2
 <strong>Output:</strong> 3
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" />
 <pre>
 <strong>Input:</strong> points = [[3,3],[1,2],[9,2]], k = 2
 <strong>Output:</strong> 2
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1956.Minimum%20Time%20For%20K%20Virus%20Variants%20to%20Spread/images/case-2.png" style="width: 416px; height: 257px;" />
 <pre>
 <strong>Input:</strong> points = [[3,3],[1,2],[9,2]], k = 3
 <strong>Output:</strong> 4
diff --git a/solution/1900-1999/1958.Check if Move is Legal/README.md b/solution/1900-1999/1958.Check if Move is Legal/README.md
index 4c2a0e0ef53b4..758460d4b8057 100644
--- a/solution/1900-1999/1958.Check if Move is Legal/README.md	
+++ b/solution/1900-1999/1958.Check if Move is Legal/README.md	
@@ -11,14 +11,14 @@
 <p>游戏中每次操作步骤为：选择一个空格子，将它变成你正在执行的颜色（要么白色，要么黑色）。但是，<strong>合法 </strong>操作必须满足：涂色后这个格子是 <strong>好线段的一个端点</strong>&nbsp;（好线段可以是水平的，竖直的或者是对角线）。</p>
 
 <p><strong>好线段</strong>&nbsp;指的是一个包含 <strong>三个或者更多格子（包含端点格子）</strong>的线段，线段两个端点格子为 <strong>同一种颜色</strong>&nbsp;，且中间剩余格子的颜色都为 <strong>另一种颜色</strong>&nbsp;（线段上不能有任何空格子）。你可以在下图找到好线段的例子：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/goodlines5.png" style="width: 500px; height: 312px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/goodlines5.png" style="width: 500px; height: 312px;" />
 <p>给你两个整数&nbsp;<code>rMove</code> 和&nbsp;<code>cMove</code>&nbsp;以及一个字符&nbsp;<code>color</code>&nbsp;，表示你正在执行操作的颜色（白或者黑），如果将格子&nbsp;<code>(rMove, cMove)</code>&nbsp;变成颜色&nbsp;<code>color</code>&nbsp;后，是一个&nbsp;<strong>合法</strong>&nbsp;操作，那么返回&nbsp;<code>true</code>&nbsp;，如果不是合法操作返回&nbsp;<code>false</code>&nbsp;。</p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid11.png" style="width: 350px; height: 350px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid11.png" style="width: 350px; height: 350px;" /></p>
 
 <pre>
 <b>输入：</b>board = [[".",".",".","B",".",".",".","."],[".",".",".","W",".",".",".","."],[".",".",".","W",".",".",".","."],[".",".",".","W",".",".",".","."],["W","B","B",".","W","W","W","B"],[".",".",".","B",".",".",".","."],[".",".",".","B",".",".",".","."],[".",".",".","W",".",".",".","."]], rMove = 4, cMove = 3, color = "B"
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid2.png" style="width: 350px; height: 351px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid2.png" style="width: 350px; height: 351px;" /></p>
 
 <pre>
 <b>输入：</b>board = [[".",".",".",".",".",".",".","."],[".","B",".",".","W",".",".","."],[".",".","W",".",".",".",".","."],[".",".",".","W","B",".",".","."],[".",".",".",".",".",".",".","."],[".",".",".",".","B","W",".","."],[".",".",".",".",".",".","W","."],[".",".",".",".",".",".",".","B"]], rMove = 4, cMove = 4, color = "W"
diff --git a/solution/1900-1999/1958.Check if Move is Legal/README_EN.md b/solution/1900-1999/1958.Check if Move is Legal/README_EN.md
index 7be6f087d1c3b..453ec839fb1a5 100644
--- a/solution/1900-1999/1958.Check if Move is Legal/README_EN.md	
+++ b/solution/1900-1999/1958.Check if Move is Legal/README_EN.md	
@@ -9,12 +9,12 @@
 <p>Each move in this game consists of choosing a free cell and changing it to the color you are playing as (either white or black). However, a move is only <strong>legal</strong> if, after changing it, the cell becomes the <strong>endpoint of a good line</strong> (horizontal, vertical, or diagonal).</p>
 
 <p>A <strong>good line</strong> is a line of <strong>three or more cells (including the endpoints)</strong> where the endpoints of the line are <strong>one color</strong>, and the remaining cells in the middle are the <strong>opposite color</strong> (no cells in the line are free). You can find examples for good lines in the figure below:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/goodlines5.png" style="width: 500px; height: 312px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/goodlines5.png" style="width: 500px; height: 312px;" />
 <p>Given two integers <code>rMove</code> and <code>cMove</code> and a character <code>color</code> representing the color you are playing as (white or black), return <code>true</code> <em>if changing cell </em><code>(rMove, cMove)</code> <em>to color</em> <code>color</code> <em>is a <strong>legal</strong> move, or </em><code>false</code><em> if it is not legal</em>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid11.png" style="width: 350px; height: 350px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid11.png" style="width: 350px; height: 350px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;W&quot;,&quot;B&quot;,&quot;B&quot;,&quot;.&quot;,&quot;W&quot;,&quot;W&quot;,&quot;W&quot;,&quot;B&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;]], rMove = 4, cMove = 3, color = &quot;B&quot;
 <strong>Output:</strong> true
@@ -23,7 +23,7 @@ The two good lines with the chosen cell as an endpoint are annotated above with
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid2.png" style="width: 350px; height: 351px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1958.Check%20if%20Move%20is%20Legal/images/grid2.png" style="width: 350px; height: 351px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;B&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;,&quot;W&quot;,&quot;.&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;W&quot;,&quot;.&quot;],[&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;.&quot;,&quot;B&quot;]], rMove = 4, cMove = 4, color = &quot;W&quot;
 <strong>Output:</strong> false
diff --git a/solution/1900-1999/1970.Last Day Where You Can Still Cross/README.md b/solution/1900-1999/1970.Last Day Where You Can Still Cross/README.md
index bb7c1325a67bd..b2c723c6e6e83 100644
--- a/solution/1900-1999/1970.Last Day Where You Can Still Cross/README.md	
+++ b/solution/1900-1999/1970.Last Day Where You Can Still Cross/README.md	
@@ -17,7 +17,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/1.png" style="width: 624px; height: 162px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/1.png" style="width: 624px; height: 162px;">
 <pre><b>输入：</b>row = 2, col = 2, cells = [[1,1],[2,1],[1,2],[2,2]]
 <b>输出：</b>2
 <b>解释：</b>上图描述了矩阵从第 0 天开始是如何变化的。
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/2.png" style="width: 504px; height: 178px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/2.png" style="width: 504px; height: 178px;">
 <pre><b>输入：</b>row = 2, col = 2, cells = [[1,1],[1,2],[2,1],[2,2]]
 <b>输出：</b>1
 <b>解释：</b>上图描述了矩阵从第 0 天开始是如何变化的。
@@ -33,7 +33,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/3.png" style="width: 666px; height: 167px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/3.png" style="width: 666px; height: 167px;">
 <pre><b>输入：</b>row = 3, col = 3, cells = [[1,2],[2,1],[3,3],[2,2],[1,1],[1,3],[2,3],[3,2],[3,1]]
 <b>输出：</b>3
 <b>解释：</b>上图描述了矩阵从第 0 天开始是如何变化的。
diff --git a/solution/1900-1999/1970.Last Day Where You Can Still Cross/README_EN.md b/solution/1900-1999/1970.Last Day Where You Can Still Cross/README_EN.md
index adde247123075..eb1b57df35994 100644
--- a/solution/1900-1999/1970.Last Day Where You Can Still Cross/README_EN.md	
+++ b/solution/1900-1999/1970.Last Day Where You Can Still Cross/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/1.png" style="width: 624px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/1.png" style="width: 624px; height: 162px;" />
 <pre>
 <strong>Input:</strong> row = 2, col = 2, cells = [[1,1],[2,1],[1,2],[2,2]]
 <strong>Output:</strong> 2
@@ -23,7 +23,7 @@ The last day where it is possible to cross from top to bottom is on day 2.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/2.png" style="width: 504px; height: 178px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/2.png" style="width: 504px; height: 178px;" />
 <pre>
 <strong>Input:</strong> row = 2, col = 2, cells = [[1,1],[1,2],[2,1],[2,2]]
 <strong>Output:</strong> 1
@@ -32,7 +32,7 @@ The last day where it is possible to cross from top to bottom is on day 1.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/3.png" style="width: 666px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1970.Last%20Day%20Where%20You%20Can%20Still%20Cross/images/3.png" style="width: 666px; height: 167px;" />
 <pre>
 <strong>Input:</strong> row = 3, col = 3, cells = [[1,2],[2,1],[3,3],[2,2],[1,1],[1,3],[2,3],[3,2],[3,1]]
 <strong>Output:</strong> 3
diff --git a/solution/1900-1999/1971.Find if Path Exists in Graph/README.md b/solution/1900-1999/1971.Find if Path Exists in Graph/README.md
index e1ef4350401f7..5b565783d3e72 100644
--- a/solution/1900-1999/1971.Find if Path Exists in Graph/README.md	
+++ b/solution/1900-1999/1971.Find if Path Exists in Graph/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex1.png" style="width: 141px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex1.png" style="width: 141px; height: 121px;" />
 <pre>
 <strong>输入：</strong>n = 3, edges = [[0,1],[1,2],[2,0]], start = 0, end = 2
 <strong>输出：</strong>true
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex2.png" style="width: 281px; height: 141px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex2.png" style="width: 281px; height: 141px;" />
 <pre>
 <strong>输入：</strong>n = 6, edges = [[0,1],[0,2],[3,5],[5,4],[4,3]], start = 0, end = 5
 <strong>输出：</strong>false
diff --git a/solution/1900-1999/1971.Find if Path Exists in Graph/README_EN.md b/solution/1900-1999/1971.Find if Path Exists in Graph/README_EN.md
index 8ef96dc3f32cc..cb304b0bb3776 100644
--- a/solution/1900-1999/1971.Find if Path Exists in Graph/README_EN.md	
+++ b/solution/1900-1999/1971.Find if Path Exists in Graph/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex1.png" style="width: 141px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex1.png" style="width: 141px; height: 121px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[1,2],[2,0]], source = 0, destination = 2
 <strong>Output:</strong> true
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex2.png" style="width: 281px; height: 141px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1971.Find%20if%20Path%20Exists%20in%20Graph/images/validpath-ex2.png" style="width: 281px; height: 141px;" />
 <pre>
 <strong>Input:</strong> n = 6, edges = [[0,1],[0,2],[3,5],[5,4],[4,3]], source = 0, destination = 5
 <strong>Output:</strong> false
diff --git a/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README.md b/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README.md
index af2b0dd4b07c5..57aa528e4002c 100644
--- a/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README.md	
+++ b/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-16-50-diagram-drawio-diagrams-net.png" style="width: 250px; height: 207px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-16-50-diagram-drawio-diagrams-net.png" style="width: 250px; height: 207px;" />
 <pre>
 <strong>输入:</strong> root = [10,3,4,2,1]
 <strong>输出:</strong> 2
@@ -23,7 +23,7 @@
 </pre>
 
 <p><strong>示例&nbsp;2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-25-21-diagram-drawio-diagrams-net.png" style="height: 196px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-25-21-diagram-drawio-diagrams-net.png" style="height: 196px; width: 200px;" />
 <pre>
 <strong>输入:</strong> root = [2,3,null,2,null]
 <strong>输出:</strong> 0
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>示例&nbsp;3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-23-53-diagram-drawio-diagrams-net.png" style="width: 50px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-23-53-diagram-drawio-diagrams-net.png" style="width: 50px; height: 50px;" />
 <pre>
 <strong>输入:</strong> root = [0]
 <strong>输出:</strong> 1
diff --git a/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README_EN.md b/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README_EN.md
index 7ea7e22bd4706..ae804bef468ab 100644
--- a/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README_EN.md	
+++ b/solution/1900-1999/1973.Count Nodes Equal to Sum of Descendants/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-16-50-diagram-drawio-diagrams-net.png" style="width: 250px; height: 207px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-16-50-diagram-drawio-diagrams-net.png" style="width: 250px; height: 207px;" />
 <pre>
 <strong>Input:</strong> root = [10,3,4,2,1]
 <strong>Output:</strong> 2
@@ -20,7 +20,7 @@ For the node with value 3: The sum of its descendants is 2+1 = 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-25-21-diagram-drawio-diagrams-net.png" style="height: 196px; width: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-25-21-diagram-drawio-diagrams-net.png" style="height: 196px; width: 200px;" />
 <pre>
 <strong>Input:</strong> root = [2,3,null,2,null]
 <strong>Output:</strong> 0
@@ -29,7 +29,7 @@ No node has a value that is equal to the sum of its descendants.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-23-53-diagram-drawio-diagrams-net.png" style="width: 50px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1973.Count%20Nodes%20Equal%20to%20Sum%20of%20Descendants/images/screenshot-2021-08-17-at-17-23-53-diagram-drawio-diagrams-net.png" style="width: 50px; height: 50px;" />
 <pre>
 <strong>Input:</strong> root = [0]
 <strong>Output:</strong> 1
diff --git a/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README.md b/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README.md
index 901d7b1565619..65c48aaa35c38 100644
--- a/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README.md	
+++ b/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README.md	
@@ -7,7 +7,7 @@
 <!-- 这里写题目描述 -->
 
 <p>有一个特殊打字机，它由一个 <strong>圆盘</strong> 和一个 <strong>指针</strong>&nbsp;组成， 圆盘上标有小写英文字母&nbsp;<code>'a'</code> 到&nbsp;<code>'z'</code>。<strong>只有</strong>&nbsp;当指针指向某个字母时，它才能被键入。指针 <strong>初始时</strong>&nbsp;指向字符 <code>'a'</code>&nbsp;。</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1974.Minimum%20Time%20to%20Type%20Word%20Using%20Special%20Typewriter/images/chart.jpg" style="width: 530px; height: 410px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1974.Minimum%20Time%20to%20Type%20Word%20Using%20Special%20Typewriter/images/chart.jpg" style="width: 530px; height: 410px;" />
 <p>每一秒钟，你可以执行以下操作之一：</p>
 
 <ul>
diff --git a/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README_EN.md b/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README_EN.md
index 7da9c6c993a55..49d621ce2d62b 100644
--- a/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README_EN.md	
+++ b/solution/1900-1999/1974.Minimum Time to Type Word Using Special Typewriter/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>There is a special typewriter with lowercase English letters <code>&#39;a&#39;</code> to <code>&#39;z&#39;</code> arranged in a <strong>circle</strong> with a <strong>pointer</strong>. A character can <strong>only</strong> be typed if the pointer is pointing to that character. The pointer is <strong>initially</strong> pointing to the character <code>&#39;a&#39;</code>.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1974.Minimum%20Time%20to%20Type%20Word%20Using%20Special%20Typewriter/images/chart.jpg" style="width: 530px; height: 410px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1974.Minimum%20Time%20to%20Type%20Word%20Using%20Special%20Typewriter/images/chart.jpg" style="width: 530px; height: 410px;" />
 <p>Each second, you may perform one of the following operations:</p>
 
 <ul>
diff --git a/solution/1900-1999/1975.Maximum Matrix Sum/README.md b/solution/1900-1999/1975.Maximum Matrix Sum/README.md
index fd1eeaefc6dc7..6c548c6577389 100644
--- a/solution/1900-1999/1975.Maximum Matrix Sum/README.md	
+++ b/solution/1900-1999/1975.Maximum Matrix Sum/README.md	
@@ -19,7 +19,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex1.png" style="width: 401px; height: 81px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex1.png" style="width: 401px; height: 81px;">
 <pre><b>输入：</b>matrix = [[1,-1],[-1,1]]
 <b>输出：</b>4
 <b>解释：</b>我们可以执行以下操作使和等于 4 ：
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>示例&nbsp;2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex2.png" style="width: 321px; height: 121px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex2.png" style="width: 321px; height: 121px;">
 <pre><b>输入：</b>matrix = [[1,2,3],[-1,-2,-3],[1,2,3]]
 <b>输出：</b>16
 <b>解释：</b>我们可以执行以下操作使和等于 16 ：
diff --git a/solution/1900-1999/1975.Maximum Matrix Sum/README_EN.md b/solution/1900-1999/1975.Maximum Matrix Sum/README_EN.md
index 8c4eeb4b21a54..dacba04cc3a53 100644
--- a/solution/1900-1999/1975.Maximum Matrix Sum/README_EN.md	
+++ b/solution/1900-1999/1975.Maximum Matrix Sum/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex1.png" style="width: 401px; height: 81px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex1.png" style="width: 401px; height: 81px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,-1],[-1,1]]
 <strong>Output:</strong> 4
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex2.png" style="width: 321px; height: 121px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1975.Maximum%20Matrix%20Sum/images/pc79-q2ex2.png" style="width: 321px; height: 121px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3],[-1,-2,-3],[1,2,3]]
 <strong>Output:</strong> 16
diff --git a/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README.md b/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README.md
index d284ec4565525..4803c6a46ae12 100644
--- a/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README.md	
+++ b/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1976.Number%20of%20Ways%20to%20Arrive%20at%20Destination/images/graph2.png" style="width: 235px; height: 381px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1976.Number%20of%20Ways%20to%20Arrive%20at%20Destination/images/graph2.png" style="width: 235px; height: 381px;">
 <pre><b>输入：</b>n = 7, roads = [[0,6,7],[0,1,2],[1,2,3],[1,3,3],[6,3,3],[3,5,1],[6,5,1],[2,5,1],[0,4,5],[4,6,2]]
 <b>输出：</b>4
 <b>解释：</b>从路口 0 出发到路口 6 花费的最少时间是 7 分钟。
diff --git a/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README_EN.md b/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README_EN.md
index a6d73cdfbba16..cc799c4e80574 100644
--- a/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README_EN.md	
+++ b/solution/1900-1999/1976.Number of Ways to Arrive at Destination/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1976.Number%20of%20Ways%20to%20Arrive%20at%20Destination/images/graph2.png" style="width: 235px; height: 381px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1976.Number%20of%20Ways%20to%20Arrive%20at%20Destination/images/graph2.png" style="width: 235px; height: 381px;" />
 <pre>
 <strong>Input:</strong> n = 7, roads = [[0,6,7],[0,1,2],[1,2,3],[1,3,3],[6,3,3],[3,5,1],[6,5,1],[2,5,1],[0,4,5],[4,6,2]]
 <strong>Output:</strong> 4
diff --git a/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README.md b/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README.md
index af7c4433e6a99..5fceb1f1b3be9 100644
--- a/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README.md	
+++ b/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1.png" style="width: 181px; height: 181px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1.png" style="width: 181px; height: 181px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[1,2,3],[4,5,6],[7,8,9]], target = 13
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-1.png" style="width: 61px; height: 181px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-1.png" style="width: 61px; height: 181px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[1],[2],[3]], target = 100
@@ -46,7 +46,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-3.png" style="width: 301px; height: 61px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-3.png" style="width: 301px; height: 61px;" /></p>
 
 <pre>
 <strong>输入：</strong>mat = [[1,2,9,8,7]], target = 6
diff --git a/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README_EN.md b/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README_EN.md
index fe621fc9d0d16..bfdec41ad7d47 100644
--- a/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README_EN.md	
+++ b/solution/1900-1999/1981.Minimize the Difference Between Target and Chosen Elements/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1.png" style="width: 181px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1.png" style="width: 181px; height: 181px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,2,3],[4,5,6],[7,8,9]], target = 13
 <strong>Output:</strong> 0
@@ -26,7 +26,7 @@ The sum of the chosen elements is 13, which equals the target, so the absolute d
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-1.png" style="width: 61px; height: 181px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-1.png" style="width: 61px; height: 181px;" />
 <pre>
 <strong>Input:</strong> mat = [[1],[2],[3]], target = 100
 <strong>Output:</strong> 94
@@ -38,7 +38,7 @@ The sum of the chosen elements is 6, and the absolute difference is 94.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-3.png" style="width: 301px; height: 61px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1981.Minimize%20the%20Difference%20Between%20Target%20and%20Chosen%20Elements/images/matrix1-3.png" style="width: 301px; height: 61px;" />
 <pre>
 <strong>Input:</strong> mat = [[1,2,9,8,7]], target = 6
 <strong>Output:</strong> 1
diff --git a/solution/1900-1999/1992.Find All Groups of Farmland/README.md b/solution/1900-1999/1992.Find All Groups of Farmland/README.md
index 156dd0563c1fd..672dd03ab1a21 100644
--- a/solution/1900-1999/1992.Find All Groups of Farmland/README.md	
+++ b/solution/1900-1999/1992.Find All Groups of Farmland/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-23-15-copy-of-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-23-15-copy-of-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;"></p>
 
 <pre><b>输入：</b>land = [[1,0,0],[0,1,1],[0,1,1]]
 <b>输出：</b>[[0,0,0,0],[1,1,2,2]]
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-30-26-copy-of-diagram-drawio-diagrams-net.png" style="width: 200px; height: 200px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-30-26-copy-of-diagram-drawio-diagrams-net.png" style="width: 200px; height: 200px;"></p>
 
 <pre><b>输入：</b>land = [[1,1],[1,1]]
 <b>输出：</b>[[0,0,1,1]]
@@ -37,7 +37,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-32-24-copy-of-diagram-drawio-diagrams-net.png" style="width: 100px; height: 100px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-32-24-copy-of-diagram-drawio-diagrams-net.png" style="width: 100px; height: 100px;"></p>
 
 <pre><b>输入：</b>land = [[0]]
 <b>输出：</b>[]
diff --git a/solution/1900-1999/1992.Find All Groups of Farmland/README_EN.md b/solution/1900-1999/1992.Find All Groups of Farmland/README_EN.md
index 320e53ab623b0..010a1b50b2f1b 100644
--- a/solution/1900-1999/1992.Find All Groups of Farmland/README_EN.md	
+++ b/solution/1900-1999/1992.Find All Groups of Farmland/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-23-15-copy-of-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-23-15-copy-of-diagram-drawio-diagrams-net.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> land = [[1,0,0],[0,1,1],[0,1,1]]
 <strong>Output:</strong> [[0,0,0,0],[1,1,2,2]]
@@ -24,7 +24,7 @@ The second group has a top left corner at land[1][1] and a bottom right corner a
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-30-26-copy-of-diagram-drawio-diagrams-net.png" style="width: 200px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-30-26-copy-of-diagram-drawio-diagrams-net.png" style="width: 200px; height: 200px;" />
 <pre>
 <strong>Input:</strong> land = [[1,1],[1,1]]
 <strong>Output:</strong> [[0,0,1,1]]
@@ -33,7 +33,7 @@ The first group has a top left corner at land[0][0] and a bottom right corner at
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-32-24-copy-of-diagram-drawio-diagrams-net.png" style="width: 100px; height: 100px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1992.Find%20All%20Groups%20of%20Farmland/images/screenshot-2021-07-27-at-12-32-24-copy-of-diagram-drawio-diagrams-net.png" style="width: 100px; height: 100px;" />
 <pre>
 <strong>Input:</strong> land = [[0]]
 <strong>Output:</strong> []
diff --git a/solution/1900-1999/1993.Operations on Tree/README.md b/solution/1900-1999/1993.Operations on Tree/README.md
index 435594fbea4bc..e6953e8616f49 100644
--- a/solution/1900-1999/1993.Operations on Tree/README.md	
+++ b/solution/1900-1999/1993.Operations on Tree/README.md	
@@ -35,7 +35,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1993.Operations%20on%20Tree/images/untitled.png" style="width: 375px; height: 246px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1993.Operations%20on%20Tree/images/untitled.png" style="width: 375px; height: 246px;"></p>
 
 <pre><strong>输入：</strong>
 ["LockingTree", "lock", "unlock", "unlock", "lock", "upgrade", "lock"]
diff --git a/solution/1900-1999/1993.Operations on Tree/README_EN.md b/solution/1900-1999/1993.Operations on Tree/README_EN.md
index 02eb1f8c713a1..6485b48ee1c47 100644
--- a/solution/1900-1999/1993.Operations on Tree/README_EN.md	
+++ b/solution/1900-1999/1993.Operations on Tree/README_EN.md	
@@ -31,7 +31,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1993.Operations%20on%20Tree/images/untitled.png" style="width: 375px; height: 246px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/1900-1999/1993.Operations%20on%20Tree/images/untitled.png" style="width: 375px; height: 246px;" />
 <pre>
 <strong>Input</strong>
 [&quot;LockingTree&quot;, &quot;lock&quot;, &quot;unlock&quot;, &quot;unlock&quot;, &quot;lock&quot;, &quot;upgrade&quot;, &quot;lock&quot;]
diff --git a/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README.md b/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README.md
index 6fb560e986a19..7490682d1c06c 100644
--- a/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README.md	
+++ b/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2002.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Subsequences/images/two-palindromic-subsequences.png" style="width: 550px; height: 124px;"></p>
+<p><img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2002.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Subsequences/images/two-palindromic-subsequences.png" style="width: 550px; height: 124px;"></p>
 
 <pre><b>输入：</b>s = "leetcodecom"
 <b>输出：</b>9
diff --git a/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README_EN.md b/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README_EN.md
index b402ab52dc7c0..6137519a65474 100644
--- a/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README_EN.md	
+++ b/solution/2000-2099/2002.Maximum Product of the Length of Two Palindromic Subsequences/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2002.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Subsequences/images/two-palindromic-subsequences.png" style="width: 550px; height: 124px;" />
+<img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2002.Maximum%20Product%20of%20the%20Length%20of%20Two%20Palindromic%20Subsequences/images/two-palindromic-subsequences.png" style="width: 550px; height: 124px;" />
 <pre>
 <strong>Input:</strong> s = &quot;leetcodecom&quot;
 <strong>Output:</strong> 9
diff --git a/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README.md b/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README.md
index 413017ab5370e..7bcf4faae89f2 100644
--- a/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README.md	
+++ b/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-1.png" style="width: 204px; height: 167px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-1.png" style="width: 204px; height: 167px;"></p>
 
 <pre><b>输入：</b>parents = [-1,0,0,2], nums = [1,2,3,4]
 <b>输出：</b>[5,1,1,1]
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-2.png" style="width: 247px; height: 168px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-2.png" style="width: 247px; height: 168px;"></p>
 
 <pre><b>输入：</b>parents = [-1,0,1,0,3,3], nums = [5,4,6,2,1,3]
 <b>输出：</b>[7,1,1,4,2,1]
diff --git a/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README_EN.md b/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README_EN.md
index a2bf31a116aff..d6ed45ac984cd 100644
--- a/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README_EN.md	
+++ b/solution/2000-2099/2003.Smallest Missing Genetic Value in Each Subtree/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-1.png" style="width: 204px; height: 167px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-1.png" style="width: 204px; height: 167px;" />
 <pre>
 <strong>Input:</strong> parents = [-1,0,0,2], nums = [1,2,3,4]
 <strong>Output:</strong> [5,1,1,1]
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-2.png" style="width: 247px; height: 168px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2003.Smallest%20Missing%20Genetic%20Value%20in%20Each%20Subtree/images/case-2.png" style="width: 247px; height: 168px;" />
 <pre>
 <strong>Input:</strong> parents = [-1,0,1,0,3,3], nums = [5,4,6,2,1,3]
 <strong>Output:</strong> [7,1,1,4,2,1]
diff --git a/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README.md b/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README.md
index 9645fba7516c6..072cd115f87c3 100644
--- a/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README.md	
+++ b/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README.md	
@@ -23,7 +23,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173520-3.png" style="width: 200px; height: 184px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173520-3.png" style="width: 200px; height: 184px;" /></p>
 
 <pre>
 <strong>输入:</strong> n = 3
@@ -37,7 +37,7 @@ Bob 只能删除根节点 3，所以 Bob 输了。
 </pre>
 
 <p><strong>示例 2:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173634-4.png" style="width: 75px; height: 75px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173634-4.png" style="width: 75px; height: 75px;" /></p>
 
 <pre>
 <strong>输入:</strong> n = 1
@@ -48,7 +48,7 @@ Alice 只能移除根节点 1, 所以 Alice 输了。
 </pre>
 
 <p><strong>示例 3:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173425-1.png" style="width: 100px; height: 106px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173425-1.png" style="width: 100px; height: 106px;" /></p>
 
 <pre>
 <strong>输入:</strong> n = 2
diff --git a/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README_EN.md b/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README_EN.md
index 47273bbbc56c0..236da06369277 100644
--- a/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README_EN.md	
+++ b/solution/2000-2099/2005.Subtree Removal Game with Fibonacci Tree/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173520-3.png" style="width: 200px; height: 184px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173520-3.png" style="width: 200px; height: 184px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 3
@@ -34,7 +34,7 @@ Return true because Alice wins.
 </pre>
 
 <p><strong>Example 2:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173634-4.png" style="width: 75px; height: 75px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173634-4.png" style="width: 75px; height: 75px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 1
@@ -45,7 +45,7 @@ Return false because Alice loses.
 </pre>
 
 <p><strong>Example 3:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173425-1.png" style="width: 100px; height: 106px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2005.Subtree%20Removal%20Game%20with%20Fibonacci%20Tree/images/image-20210914173425-1.png" style="width: 100px; height: 106px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 2
diff --git a/solution/2000-2099/2013.Detect Squares/README.md b/solution/2000-2099/2013.Detect Squares/README.md
index 7ab2b7cb74780..b0ece15f7b1b2 100644
--- a/solution/2000-2099/2013.Detect Squares/README.md	
+++ b/solution/2000-2099/2013.Detect Squares/README.md	
@@ -26,7 +26,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2013.Detect%20Squares/images/image.png" style="width: 869px; height: 504px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2013.Detect%20Squares/images/image.png" style="width: 869px; height: 504px;" />
 <pre>
 <strong>输入：</strong>
 ["DetectSquares", "add", "add", "add", "count", "count", "add", "count"]
diff --git a/solution/2000-2099/2013.Detect Squares/README_EN.md b/solution/2000-2099/2013.Detect Squares/README_EN.md
index 04abd5f77ed7b..08cfc4ac63a32 100644
--- a/solution/2000-2099/2013.Detect Squares/README_EN.md	
+++ b/solution/2000-2099/2013.Detect Squares/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2013.Detect%20Squares/images/image.png" style="width: 869px; height: 504px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2013.Detect%20Squares/images/image.png" style="width: 869px; height: 504px;" />
 <pre>
 <strong>Input</strong>
 [&quot;DetectSquares&quot;, &quot;add&quot;, &quot;add&quot;, &quot;add&quot;, &quot;count&quot;, &quot;count&quot;, &quot;add&quot;, &quot;count&quot;]
diff --git a/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README.md b/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README.md
index aa3ebfaba66e4..84abe5b60a67d 100644
--- a/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README.md	
+++ b/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example 1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2014.Longest%20Subsequence%20Repeated%20k%20Times/images/longest-subsequence-repeat-k-times.png" style="width: 457px; height: 99px;" /></p>
+<p><img alt="example 1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2014.Longest%20Subsequence%20Repeated%20k%20Times/images/longest-subsequence-repeat-k-times.png" style="width: 457px; height: 99px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "letsleetcode", k = 2
diff --git a/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README_EN.md b/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README_EN.md
index f149b1360c8a3..f8491f5e209ed 100644
--- a/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README_EN.md	
+++ b/solution/2000-2099/2014.Longest Subsequence Repeated k Times/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example 1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2014.Longest%20Subsequence%20Repeated%20k%20Times/images/longest-subsequence-repeat-k-times.png" style="width: 457px; height: 99px;" />
+<img alt="example 1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2014.Longest%20Subsequence%20Repeated%20k%20Times/images/longest-subsequence-repeat-k-times.png" style="width: 457px; height: 99px;" />
 <pre>
 <strong>Input:</strong> s = &quot;letsleetcode&quot;, k = 2
 <strong>Output:</strong> &quot;let&quot;
diff --git a/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README.md b/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README.md
index a0695abb477ef..2731bf1a1ce84 100644
--- a/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README.md	
+++ b/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README.md	
@@ -27,7 +27,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2015.Average%20Height%20of%20Buildings%20in%20Each%20Segment/images/image-20210921224001-2.png" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2015.Average%20Height%20of%20Buildings%20in%20Each%20Segment/images/image-20210921224001-2.png" />
 <pre>
 <strong>输入:</strong> buildings = [[1,4,2],[3,9,4]]
 <strong>输出:</strong> [[1,3,2],[3,4,3],[4,9,4]]
diff --git a/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README_EN.md b/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README_EN.md
index 6d2ef7e6e6c51..8dc259a713e00 100644
--- a/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README_EN.md	
+++ b/solution/2000-2099/2015.Average Height of Buildings in Each Segment/README_EN.md	
@@ -27,7 +27,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2015.Average%20Height%20of%20Buildings%20in%20Each%20Segment/images/image-20210921224001-2.png" style="width: 500px; height: 349px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2015.Average%20Height%20of%20Buildings%20in%20Each%20Segment/images/image-20210921224001-2.png" style="width: 500px; height: 349px;" />
 <pre>
 <strong>Input:</strong> buildings = [[1,4,2],[3,9,4]]
 <strong>Output:</strong> [[1,3,2],[3,4,3],[4,9,4]]
diff --git a/solution/2000-2099/2017.Grid Game/README.md b/solution/2000-2099/2017.Grid Game/README.md
index e94e47eebdf82..49e8a09e5c7c5 100644
--- a/solution/2000-2099/2017.Grid Game/README.md	
+++ b/solution/2000-2099/2017.Grid Game/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a1.png" style="width: 388px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a1.png" style="width: 388px; height: 103px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[2,5,4],[1,5,1]]
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a2.png" style="width: 384px; height: 105px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a2.png" style="width: 384px; height: 105px;" />
 <pre>
 <strong>输入：</strong>grid = [[3,3,1],[8,5,2]]
 <strong>输出：</strong>4
@@ -39,7 +39,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a3.png" style="width: 493px; height: 103px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a3.png" style="width: 493px; height: 103px;" />
 <pre>
 <strong>输入：</strong>grid = [[1,3,1,15],[1,3,3,1]]
 <strong>输出：</strong>7
diff --git a/solution/2000-2099/2017.Grid Game/README_EN.md b/solution/2000-2099/2017.Grid Game/README_EN.md
index 3ee7825c8eec7..759b199cca2c5 100644
--- a/solution/2000-2099/2017.Grid Game/README_EN.md	
+++ b/solution/2000-2099/2017.Grid Game/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a1.png" style="width: 388px; height: 103px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a1.png" style="width: 388px; height: 103px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,5,4],[1,5,1]]
 <strong>Output:</strong> 4
@@ -24,7 +24,7 @@ The second robot will collect 0 + 0 + 4 + 0 = 4 points.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a2.png" style="width: 384px; height: 105px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a2.png" style="width: 384px; height: 105px;" />
 <pre>
 <strong>Input:</strong> grid = [[3,3,1],[8,5,2]]
 <strong>Output:</strong> 4
@@ -34,7 +34,7 @@ The second robot will collect 0 + 3 + 1 + 0 = 4 points.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a3.png" style="width: 493px; height: 103px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2017.Grid%20Game/images/a3.png" style="width: 493px; height: 103px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,3,1,15],[1,3,3,1]]
 <strong>Output:</strong> 7
diff --git a/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README.md b/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README.md
index 483cad606e52f..05d745f2b9628 100644
--- a/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README.md	
+++ b/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-1.png" style="width: 170px; height: 150px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-1.png" style="width: 170px; height: 150px;" /></p>
 
 <pre>
 <b>输入：</b>board = [["#", " ", "#"], [" ", " ", "#"], ["#", "c", " "]], word = "abc"
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/c2.png" style="width: 170px; height: 151px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/c2.png" style="width: 170px; height: 151px;" /></p>
 
 <pre>
 <b>输入：</b>board = [[" ", "#", "a"], [" ", "#", "c"], [" ", "#", "a"]], word = "ac"
@@ -42,7 +42,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-2.png" style="width: 171px; height: 146px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-2.png" style="width: 171px; height: 146px;" /></p>
 
 <pre>
 <b>输入：</b>board = [["#", " ", "#"], [" ", " ", "#"], ["#", " ", "c"]], word = "ca"
diff --git a/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README_EN.md b/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README_EN.md
index 3c29b7f8f28cb..fb0e22541e701 100644
--- a/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README_EN.md	
+++ b/solution/2000-2099/2018.Check if Word Can Be Placed In Crossword/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex1-1.png" style="width: 478px; height: 180px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex1-1.png" style="width: 478px; height: 180px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;#&quot;, &quot; &quot;, &quot;#&quot;], [&quot; &quot;, &quot; &quot;, &quot;#&quot;], [&quot;#&quot;, &quot;c&quot;, &quot; &quot;]], word = &quot;abc&quot;
 <strong>Output:</strong> true
@@ -27,14 +27,14 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex2-1.png" style="width: 180px; height: 180px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex2-1.png" style="width: 180px; height: 180px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot; &quot;, &quot;#&quot;, &quot;a&quot;], [&quot; &quot;, &quot;#&quot;, &quot;c&quot;], [&quot; &quot;, &quot;#&quot;, &quot;a&quot;]], word = &quot;ac&quot;
 <strong>Output:</strong> false
 <strong>Explanation:</strong> It is impossible to place the word because there will always be a space/letter above or below it.</pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex3-1.png" style="width: 478px; height: 180px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2018.Check%20if%20Word%20Can%20Be%20Placed%20In%20Crossword/images/crossword-ex3-1.png" style="width: 478px; height: 180px;" />
 <pre>
 <strong>Input:</strong> board = [[&quot;#&quot;, &quot; &quot;, &quot;#&quot;], [&quot; &quot;, &quot; &quot;, &quot;#&quot;], [&quot;#&quot;, &quot; &quot;, &quot;c&quot;]], word = &quot;ca&quot;
 <strong>Output:</strong> true
diff --git a/solution/2000-2099/2019.The Score of Students Solving Math Expression/README.md b/solution/2000-2099/2019.The Score of Students Solving Math Expression/README.md
index c8810861db941..ad1fc13bac3dc 100644
--- a/solution/2000-2099/2019.The Score of Students Solving Math Expression/README.md	
+++ b/solution/2000-2099/2019.The Score of Students Solving Math Expression/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2019.The%20Score%20of%20Students%20Solving%20Math%20Expression/images/student_solving_math.png" style="width: 678px; height: 109px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2019.The%20Score%20of%20Students%20Solving%20Math%20Expression/images/student_solving_math.png" style="width: 678px; height: 109px;"></p>
 
 <pre><b>输入：</b>s = "7+3*1*2", answers = [20,13,42]
 <b>输出：</b>7
diff --git a/solution/2000-2099/2019.The Score of Students Solving Math Expression/README_EN.md b/solution/2000-2099/2019.The Score of Students Solving Math Expression/README_EN.md
index a91cf4917fbbb..b237a0a5d9e0d 100644
--- a/solution/2000-2099/2019.The Score of Students Solving Math Expression/README_EN.md	
+++ b/solution/2000-2099/2019.The Score of Students Solving Math Expression/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2019.The%20Score%20of%20Students%20Solving%20Math%20Expression/images/student_solving_math.png" style="width: 678px; height: 109px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2019.The%20Score%20of%20Students%20Solving%20Math%20Expression/images/student_solving_math.png" style="width: 678px; height: 109px;" />
 <pre>
 <strong>Input:</strong> s = &quot;7+3*1*2&quot;, answers = [20,13,42]
 <strong>Output:</strong> 7
diff --git a/solution/2000-2099/2021.Brightest Position on Street/README.md b/solution/2000-2099/2021.Brightest Position on Street/README.md
index 224058e165fa0..d48a76c6a7eb8 100644
--- a/solution/2000-2099/2021.Brightest Position on Street/README.md	
+++ b/solution/2000-2099/2021.Brightest Position on Street/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2021.Brightest%20Position%20on%20Street/images/image-20210928155140-1.png" style="width: 700px; height: 165px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2021.Brightest%20Position%20on%20Street/images/image-20210928155140-1.png" style="width: 700px; height: 165px;">
 <pre><strong>输入:</strong> lights = [[-3,2],[1,2],[3,3]]
 <strong>输出:</strong> -1
 <strong>解释:</strong>
diff --git a/solution/2000-2099/2021.Brightest Position on Street/README_EN.md b/solution/2000-2099/2021.Brightest Position on Street/README_EN.md
index bf8598702f1d7..791f7a1940d7f 100644
--- a/solution/2000-2099/2021.Brightest Position on Street/README_EN.md	
+++ b/solution/2000-2099/2021.Brightest Position on Street/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2021.Brightest%20Position%20on%20Street/images/image-20210928155140-1.png" style="width: 700px; height: 165px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2021.Brightest%20Position%20on%20Street/images/image-20210928155140-1.png" style="width: 700px; height: 165px;" />
 <pre>
 <strong>Input:</strong> lights = [[-3,2],[1,2],[3,3]]
 <strong>Output:</strong> -1
diff --git a/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README.md b/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README.md
index 6fd553c281fa4..75fc0dbf0e0c2 100644
--- a/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README.md	
+++ b/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2022.Convert%201D%20Array%20Into%202D%20Array/images/image-20210826114243-1.png" style="width: 500px; height: 174px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2022.Convert%201D%20Array%20Into%202D%20Array/images/image-20210826114243-1.png" style="width: 500px; height: 174px;">
 <pre><b>输入：</b>original = [1,2,3,4], m = 2, n = 2
 <b>输出：</b>[[1,2],[3,4]]
 <strong>解释：
diff --git a/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README_EN.md b/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README_EN.md
index fdfbfc3482dd4..c76ef41d31fc8 100644
--- a/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README_EN.md	
+++ b/solution/2000-2099/2022.Convert 1D Array Into 2D Array/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2022.Convert%201D%20Array%20Into%202D%20Array/images/image-20210826114243-1.png" style="width: 500px; height: 174px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2022.Convert%201D%20Array%20Into%202D%20Array/images/image-20210826114243-1.png" style="width: 500px; height: 174px;" />
 <pre>
 <strong>Input:</strong> original = [1,2,3,4], m = 2, n = 2
 <strong>Output:</strong> [[1,2],[3,4]]
diff --git a/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README.md b/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README.md
index 4eca7f962dbef..5eef4385b46a1 100644
--- a/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README.md	
+++ b/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README.md	
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="example-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2030.Smallest%20K-Length%20Subsequence%20With%20Occurrences%20of%20a%20Letter/images/smallest-k-length-subsequence.png" style="width: 339px; height: 67px;" /></p>
+<p><img alt="example-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2030.Smallest%20K-Length%20Subsequence%20With%20Occurrences%20of%20a%20Letter/images/smallest-k-length-subsequence.png" style="width: 339px; height: 67px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "leetcode", k = 4, letter = "e", repetition = 2
diff --git a/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README_EN.md b/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README_EN.md
index 4e585fe26e005..09ec8742e3813 100644
--- a/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README_EN.md	
+++ b/solution/2000-2099/2030.Smallest K-Length Subsequence With Occurrences of a Letter/README_EN.md	
@@ -27,7 +27,7 @@ The lexicographically smallest subsequence among them is &quot;eet&quot;.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="example-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2030.Smallest%20K-Length%20Subsequence%20With%20Occurrences%20of%20a%20Letter/images/smallest-k-length-subsequence.png" style="width: 339px; height: 67px;" />
+<img alt="example-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2030.Smallest%20K-Length%20Subsequence%20With%20Occurrences%20of%20a%20Letter/images/smallest-k-length-subsequence.png" style="width: 339px; height: 67px;" />
 <pre>
 <strong>Input:</strong> s = &quot;leetcode&quot;, k = 4, letter = &quot;e&quot;, repetition = 2
 <strong>Output:</strong> &quot;ecde&quot;
diff --git a/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README.md b/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README.md
index 59c9f9af2abc3..bb5a1e833548f 100644
--- a/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README.md	
+++ b/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt.png" style="width: 164px; height: 165px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt.png" style="width: 164px; height: 165px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[2,4],[6,8]], x = 2
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-1.png" style="width: 164px; height: 165px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-1.png" style="width: 164px; height: 165px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,5],[2,3]], x = 1
@@ -40,7 +40,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-2.png" style="width: 164px; height: 165px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-2.png" style="width: 164px; height: 165px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[1,2],[3,4]], x = 2
diff --git a/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README_EN.md b/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README_EN.md
index f8b8593254e7b..52beba77bd061 100644
--- a/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README_EN.md	
+++ b/solution/2000-2099/2033.Minimum Operations to Make a Uni-Value Grid/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt.png" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt.png" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[2,4],[6,8]], x = 2
 <strong>Output:</strong> 4
@@ -24,7 +24,7 @@ A total of 4 operations were used.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-1.png" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-1.png" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,5],[2,3]], x = 1
 <strong>Output:</strong> 5
@@ -32,7 +32,7 @@ A total of 4 operations were used.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-2.png" style="width: 164px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2033.Minimum%20Operations%20to%20Make%20a%20Uni-Value%20Grid/images/gridtxt-2.png" style="width: 164px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2],[3,4]], x = 2
 <strong>Output:</strong> -1
diff --git a/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README.md b/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README.md
index 07633be402360..1dff4ff8ec333 100644
--- a/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README.md	
+++ b/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex1.png" style="width: 240px; height: 106px;"></p>
+<p><img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex1.png" style="width: 240px; height: 106px;"></p>
 
 <pre><b>输入：</b>nums = [3,9,7,3]
 <b>输出：</b>2
@@ -32,7 +32,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="example-3" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex3.png" style="width: 316px; height: 106px;"></p>
+<p><img alt="example-3" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex3.png" style="width: 316px; height: 106px;"></p>
 
 <pre><b>输入：</b>nums = [2,-1,0,4,-2,-9]
 <b>输出：</b>0
diff --git a/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README_EN.md b/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README_EN.md
index c7eac8abeb3bf..9ce6ca8cbf354 100644
--- a/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README_EN.md	
+++ b/solution/2000-2099/2035.Partition Array Into Two Arrays to Minimize Sum Difference/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex1.png" style="width: 240px; height: 106px;" />
+<img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex1.png" style="width: 240px; height: 106px;" />
 <pre>
 <strong>Input:</strong> nums = [3,9,7,3]
 <strong>Output:</strong> 2
@@ -28,7 +28,7 @@ The absolute difference between the sums of the arrays is abs((-36) - (36)) = 72
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="example-3" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex3.png" style="width: 316px; height: 106px;" />
+<img alt="example-3" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2035.Partition%20Array%20Into%20Two%20Arrays%20to%20Minimize%20Sum%20Difference/images/ex3.png" style="width: 316px; height: 106px;" />
 <pre>
 <strong>Input:</strong> nums = [2,-1,0,4,-2,-9]
 <strong>Output:</strong> 0
diff --git a/solution/2000-2099/2039.The Time When the Network Becomes Idle/README.md b/solution/2000-2099/2039.The Time When the Network Becomes Idle/README.md
index 8d13970a95443..00f5ead07e20b 100644
--- a/solution/2000-2099/2039.The Time When the Network Becomes Idle/README.md	
+++ b/solution/2000-2099/2039.The Time When the Network Becomes Idle/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example 1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/quiet-place-example1.png" style="width: 750px; height: 384px;"></p>
+<p><img alt="example 1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/quiet-place-example1.png" style="width: 750px; height: 384px;"></p>
 
 <pre><b>输入：</b>edges = [[0,1],[1,2]], patience = [0,2,1]
 <b>输出：</b>8
@@ -57,7 +57,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="example 2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/network_a_quiet_place_2.png" style="width: 100px; height: 85px;"></p>
+<p><img alt="example 2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/network_a_quiet_place_2.png" style="width: 100px; height: 85px;"></p>
 
 <pre><b>输入：</b>edges = [[0,1],[0,2],[1,2]], patience = [0,10,10]
 <b>输出：</b>3
diff --git a/solution/2000-2099/2039.The Time When the Network Becomes Idle/README_EN.md b/solution/2000-2099/2039.The Time When the Network Becomes Idle/README_EN.md
index fa7aed2220bd8..c5b3feb99bde4 100644
--- a/solution/2000-2099/2039.The Time When the Network Becomes Idle/README_EN.md	
+++ b/solution/2000-2099/2039.The Time When the Network Becomes Idle/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example 1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/quiet-place-example1.png" style="width: 750px; height: 384px;" />
+<img alt="example 1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/quiet-place-example1.png" style="width: 750px; height: 384px;" />
 <pre>
 <strong>Input:</strong> edges = [[0,1],[1,2]], patience = [0,2,1]
 <strong>Output:</strong> 8
@@ -55,7 +55,7 @@ This is the time when the network becomes idle.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="example 2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/network_a_quiet_place_2.png" style="width: 100px; height: 85px;" />
+<img alt="example 2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2039.The%20Time%20When%20the%20Network%20Becomes%20Idle/images/network_a_quiet_place_2.png" style="width: 100px; height: 85px;" />
 <pre>
 <strong>Input:</strong> edges = [[0,1],[0,2],[1,2]], patience = [0,10,10]
 <strong>Output:</strong> 3
diff --git a/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README.md b/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README.md
index 83d7d0a3ae3ff..d4416fbbd9798 100644
--- a/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README.md	
+++ b/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example1.png" style="width: 637px; height: 48px;" /></p>
+<p><img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example1.png" style="width: 637px; height: 48px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "1 box has 3 blue 4 red 6 green and 12 yellow marbles"
@@ -39,7 +39,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="example-3" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example3.png" style="width: 794px; height: 48px;" /></p>
+<p><img alt="example-3" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example3.png" style="width: 794px; height: 48px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "sunset is at 7 51 pm overnight lows will be in the low 50 and 60 s"
diff --git a/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README_EN.md b/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README_EN.md
index 3a93f94d60f70..81813a307cc23 100644
--- a/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README_EN.md	
+++ b/solution/2000-2099/2042.Check if Numbers Are Ascending in a Sentence/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example1.png" style="width: 637px; height: 48px;" />
+<img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example1.png" style="width: 637px; height: 48px;" />
 <pre>
 <strong>Input:</strong> s = &quot;1 box has 3 blue 4 red 6 green and 12 yellow marbles&quot;
 <strong>Output:</strong> true
@@ -33,7 +33,7 @@ They are strictly increasing from left to right: 1 &lt; 3 &lt; 4 &lt; 6 &lt; 12.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="example-3" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example3.png" style="width: 794px; height: 48px;" />
+<img alt="example-3" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2042.Check%20if%20Numbers%20Are%20Ascending%20in%20a%20Sentence/images/example3.png" style="width: 794px; height: 48px;" />
 <pre>
 <strong>Input:</strong> s = &quot;sunset is at 7 51 pm overnight lows will be in the low 50 and 60 s&quot;
 <strong>Output:</strong> false
diff --git a/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README.md b/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README.md
index a15d2ddc0fc71..2206b52ef8008 100644
--- a/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README.md	
+++ b/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README.md	
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e1.png" style="width: 200px; height: 250px;" />        <img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e2.png" style="width: 200px; height: 250px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e1.png" style="width: 200px; height: 250px;" />        <img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e2.png" style="width: 200px; height: 250px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 5, edges = [[1,2],[1,3],[1,4],[3,4],[4,5]], time = 3, change = 5
@@ -54,7 +54,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/eg2.png" style="width: 225px; height: 50px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/eg2.png" style="width: 225px; height: 50px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 2, edges = [[1,2]], time = 3, change = 2
diff --git a/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README_EN.md b/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README_EN.md
index ffce6b13769a8..8e7106ab3cdb0 100644
--- a/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README_EN.md	
+++ b/solution/2000-2099/2045.Second Minimum Time to Reach Destination/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e1.png" style="width: 200px; height: 250px;" /> &emsp; &emsp; &emsp; &emsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e2.png" style="width: 200px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e1.png" style="width: 200px; height: 250px;" /> &emsp; &emsp; &emsp; &emsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/e2.png" style="width: 200px; height: 250px;" />
 <pre>
 <strong>Input:</strong> n = 5, edges = [[1,2],[1,3],[1,4],[3,4],[4,5]], time = 3, change = 5
 <strong>Output:</strong> 13
@@ -49,7 +49,7 @@ Hence the second minimum time is 13 minutes.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/eg2.png" style="width: 225px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2045.Second%20Minimum%20Time%20to%20Reach%20Destination/images/eg2.png" style="width: 225px; height: 50px;" />
 <pre>
 <strong>Input:</strong> n = 2, edges = [[1,2]], time = 3, change = 2
 <strong>Output:</strong> 11
diff --git a/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README.md b/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README.md
index 23f62f6271f26..503b477cbc524 100644
--- a/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README.md	
+++ b/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README.md	
@@ -11,7 +11,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201240-3.png" style="width: 621px; height: 250px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201240-3.png" style="width: 621px; height: 250px;">
 <pre><strong>输入:</strong> head = [0,2,-5,5,10,-10]
 <strong>输出:</strong> [-10,-5,0,2,5,10]
 <strong>解释:</strong>
@@ -21,7 +21,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201318-4.png" style="width: 338px; height: 250px;"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201318-4.png" style="width: 338px; height: 250px;"></p>
 
 <pre><strong>输入:</strong> head = [0,1,2]
 <strong>输出:</strong> [0,1,2]
diff --git a/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README_EN.md b/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README_EN.md
index 6d0b28582bc58..aa04c014ce848 100644
--- a/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README_EN.md	
+++ b/solution/2000-2099/2046.Sort Linked List Already Sorted Using Absolute Values/README_EN.md	
@@ -8,7 +8,7 @@ Given the <code>head</code> of a singly linked list that is sorted in <strong>no
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201240-3.png" style="width: 621px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201240-3.png" style="width: 621px; height: 250px;" />
 <pre>
 <strong>Input:</strong> head = [0,2,-5,5,10,-10]
 <strong>Output:</strong> [-10,-5,0,2,5,10]
@@ -18,7 +18,7 @@ The list sorted in non-descending order using the actual values is [-10,-5,0,2,5
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201318-4.png" style="width: 338px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2046.Sort%20Linked%20List%20Already%20Sorted%20Using%20Absolute%20Values/images/image-20211017201318-4.png" style="width: 338px; height: 250px;" />
 <pre>
 <strong>Input:</strong> head = [0,1,2]
 <strong>Output:</strong> [0,1,2]
diff --git a/solution/2000-2099/2049.Count Nodes With the Highest Score/README.md b/solution/2000-2099/2049.Count Nodes With the Highest Score/README.md
index 93bb5aa98b057..88db8be1c4e54 100644
--- a/solution/2000-2099/2049.Count Nodes With the Highest Score/README.md	
+++ b/solution/2000-2099/2049.Count Nodes With the Highest Score/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例&nbsp;1:</strong></p>
 
-<p><img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-1.png" style="width: 604px; height: 266px;"></p>
+<p><img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-1.png" style="width: 604px; height: 266px;"></p>
 
 <pre><b>输入：</b>parents = [-1,2,0,2,0]
 <b>输出：</b>3
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="example-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-2.png" style="width: 95px; height: 143px;"></p>
+<p><img alt="example-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-2.png" style="width: 95px; height: 143px;"></p>
 
 <pre><b>输入：</b>parents = [-1,2,0]
 <b>输出：</b>2
diff --git a/solution/2000-2099/2049.Count Nodes With the Highest Score/README_EN.md b/solution/2000-2099/2049.Count Nodes With the Highest Score/README_EN.md
index 2e326175d19c2..ebee568302b71 100644
--- a/solution/2000-2099/2049.Count Nodes With the Highest Score/README_EN.md	
+++ b/solution/2000-2099/2049.Count Nodes With the Highest Score/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-1.png" style="width: 604px; height: 266px;" />
+<img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-1.png" style="width: 604px; height: 266px;" />
 <pre>
 <strong>Input:</strong> parents = [-1,2,0,2,0]
 <strong>Output:</strong> 3
@@ -26,7 +26,7 @@ The highest score is 4, and three nodes (node 1, node 3, and node 4) have the hi
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="example-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-2.png" style="width: 95px; height: 143px;" />
+<img alt="example-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2049.Count%20Nodes%20With%20the%20Highest%20Score/images/example-2.png" style="width: 95px; height: 143px;" />
 <pre>
 <strong>Input:</strong> parents = [-1,2,0]
 <strong>Output:</strong> 2
diff --git a/solution/2000-2099/2050.Parallel Courses III/README.md b/solution/2000-2099/2050.Parallel Courses III/README.md
index 2bd9a90ffe212..08a7c24329578 100644
--- a/solution/2000-2099/2050.Parallel Courses III/README.md	
+++ b/solution/2000-2099/2050.Parallel Courses III/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例&nbsp;1:</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex1.png" style="width: 392px; height: 232px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex1.png" style="width: 392px; height: 232px;"></strong></p>
 
 <pre><strong>输入：</strong>n = 3, relations = [[1,3],[2,3]], time = [3,2,5]
 <b>输出：</b>8
@@ -35,7 +35,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex2.png" style="width: 500px; height: 365px;"></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex2.png" style="width: 500px; height: 365px;"></strong></p>
 
 <pre><b>输入：</b>n = 5, relations = [[1,5],[2,5],[3,5],[3,4],[4,5]], time = [1,2,3,4,5]
 <b>输出：</b>12
diff --git a/solution/2000-2099/2050.Parallel Courses III/README_EN.md b/solution/2000-2099/2050.Parallel Courses III/README_EN.md
index dd1a8e09aa196..cd0d2dc5e1a3d 100644
--- a/solution/2000-2099/2050.Parallel Courses III/README_EN.md	
+++ b/solution/2000-2099/2050.Parallel Courses III/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex1.png" style="width: 392px; height: 232px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex1.png" style="width: 392px; height: 232px;" /></strong>
 
 <pre>
 <strong>Input:</strong> n = 3, relations = [[1,3],[2,3]], time = [3,2,5]
@@ -31,7 +31,7 @@ Thus, the earliest time we can start course 3 is at month 3, and the total time
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex2.png" style="width: 500px; height: 365px;" /></strong>
+<strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2050.Parallel%20Courses%20III/images/ex2.png" style="width: 500px; height: 365px;" /></strong>
 
 <pre>
 <strong>Input:</strong> n = 5, relations = [[1,5],[2,5],[3,5],[3,4],[4,5]], time = [1,2,3,4,5]
diff --git a/solution/2000-2099/2054.Two Best Non-Overlapping Events/README.md b/solution/2000-2099/2054.Two Best Non-Overlapping Events/README.md
index 7f207cab4ee60..5f044b403ad3e 100644
--- a/solution/2000-2099/2054.Two Best Non-Overlapping Events/README.md	
+++ b/solution/2000-2099/2054.Two Best Non-Overlapping Events/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture5.png" style="width: 400px; height: 75px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture5.png" style="width: 400px; height: 75px;"></p>
 
 <pre><b>输入：</b>events = [[1,3,2],[4,5,2],[2,4,3]]
 <b>输出：</b>4
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="Example 1 Diagram" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture1.png" style="width: 400px; height: 77px;"></p>
+<p><img alt="Example 1 Diagram" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture1.png" style="width: 400px; height: 77px;"></p>
 
 <pre><b>输入：</b>events = [[1,3,2],[4,5,2],[1,5,5]]
 <b>输出：</b>5
@@ -34,7 +34,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture3.png" style="width: 400px; height: 66px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture3.png" style="width: 400px; height: 66px;"></p>
 
 <pre><b>输入：</b>events = [[1,5,3],[1,5,1],[6,6,5]]
 <b>输出：</b>8
diff --git a/solution/2000-2099/2054.Two Best Non-Overlapping Events/README_EN.md b/solution/2000-2099/2054.Two Best Non-Overlapping Events/README_EN.md
index 032839a9c8d9b..225be29467e1e 100644
--- a/solution/2000-2099/2054.Two Best Non-Overlapping Events/README_EN.md	
+++ b/solution/2000-2099/2054.Two Best Non-Overlapping Events/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture5.png" style="width: 400px; height: 75px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture5.png" style="width: 400px; height: 75px;" />
 <pre>
 <strong>Input:</strong> events = [[1,3,2],[4,5,2],[2,4,3]]
 <strong>Output:</strong> 4
@@ -20,7 +20,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="Example 1 Diagram" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture1.png" style="width: 400px; height: 77px;" />
+<img alt="Example 1 Diagram" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture1.png" style="width: 400px; height: 77px;" />
 <pre>
 <strong>Input:</strong> events = [[1,3,2],[4,5,2],[1,5,5]]
 <strong>Output:</strong> 5
@@ -28,7 +28,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture3.png" style="width: 400px; height: 66px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2054.Two%20Best%20Non-Overlapping%20Events/images/picture3.png" style="width: 400px; height: 66px;" />
 <pre>
 <strong>Input:</strong> events = [[1,5,3],[1,5,1],[6,6,5]]
 <strong>Output:</strong> 8
diff --git a/solution/2000-2099/2055.Plates Between Candles/README.md b/solution/2000-2099/2055.Plates Between Candles/README.md
index b5c433b90bbc0..9c305c405892d 100644
--- a/solution/2000-2099/2055.Plates Between Candles/README.md	
+++ b/solution/2000-2099/2055.Plates Between Candles/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="ex-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-1.png" style="width: 400px; height: 134px;"></p>
+<p><img alt="ex-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-1.png" style="width: 400px; height: 134px;"></p>
 
 <pre><b>输入：</b>s = "**|**|***|", queries = [[2,5],[5,9]]
 <b>输出：</b>[2,3]
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2:</strong></p>
 
-<p><img alt="ex-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-2.png" style="width: 600px; height: 193px;"></p>
+<p><img alt="ex-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-2.png" style="width: 600px; height: 193px;"></p>
 
 <pre><b>输入：</b>s = "***|**|*****|**||**|*", queries = [[1,17],[4,5],[14,17],[5,11],[15,16]]
 <b>输出：</b>[9,0,0,0,0]
diff --git a/solution/2000-2099/2055.Plates Between Candles/README_EN.md b/solution/2000-2099/2055.Plates Between Candles/README_EN.md
index 492f2ffb4b191..c2f3bc0a00819 100644
--- a/solution/2000-2099/2055.Plates Between Candles/README_EN.md	
+++ b/solution/2000-2099/2055.Plates Between Candles/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="ex-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-1.png" style="width: 400px; height: 134px;" />
+<img alt="ex-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-1.png" style="width: 400px; height: 134px;" />
 <pre>
 <strong>Input:</strong> s = &quot;**|**|***|&quot;, queries = [[2,5],[5,9]]
 <strong>Output:</strong> [2,3]
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="ex-2" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-2.png" style="width: 600px; height: 193px;" />
+<img alt="ex-2" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2055.Plates%20Between%20Candles/images/ex-2.png" style="width: 600px; height: 193px;" />
 <pre>
 <strong>Input:</strong> s = &quot;***|**|*****|**||**|*&quot;, queries = [[1,17],[4,5],[14,17],[5,11],[15,16]]
 <strong>Output:</strong> [9,0,0,0,0]
diff --git a/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README.md b/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README.md
index 94825cdcdda8b..f86678dc85257 100644
--- a/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README.md	
+++ b/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README.md	
@@ -32,7 +32,7 @@
 
 <p><strong>示例 1:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a1.png" style="width: 215px; height: 215px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a1.png" style="width: 215px; height: 215px;" /></p>
 
 <pre>
 <b>输入：</b>pieces = ["rook"], positions = [[1,1]]
@@ -42,7 +42,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a2.png" style="width: 215px; height: 215px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a2.png" style="width: 215px; height: 215px;" /></p>
 
 <pre>
 <b>输入：</b>pieces = ["queen"], positions = [[1,1]]
@@ -52,7 +52,7 @@
 
 <p><strong>示例 3:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a3.png" style="width: 214px; height: 215px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a3.png" style="width: 214px; height: 215px;" /></p>
 
 <pre>
 <b>输入：</b>pieces = ["bishop"], positions = [[4,3]]
@@ -62,7 +62,7 @@
 
 <p><strong>示例 4:</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a4.png" style="width: 216px; height: 219px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a4.png" style="width: 216px; height: 219px;" /></p>
 
 <pre>
 <b>输入：</b>pieces = ["rook","rook"], positions = [[1,1],[8,8]]
@@ -78,7 +78,7 @@
 
 <p><strong>示例 5：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a5.png" style="width: 214px; height: 213px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a5.png" style="width: 214px; height: 213px;" /></p>
 
 <pre>
 <b>输入：</b>pieces = ["queen","bishop"], positions = [[5,7],[3,4]]
diff --git a/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README_EN.md b/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README_EN.md
index 29ef114dfe1b9..87a2dbd87c24f 100644
--- a/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README_EN.md	
+++ b/solution/2000-2099/2056.Number of Valid Move Combinations On Chessboard/README_EN.md	
@@ -28,7 +28,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a1.png" style="width: 215px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a1.png" style="width: 215px; height: 215px;" />
 <pre>
 <strong>Input:</strong> pieces = [&quot;rook&quot;], positions = [[1,1]]
 <strong>Output:</strong> 15
@@ -36,7 +36,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a2.png" style="width: 215px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a2.png" style="width: 215px; height: 215px;" />
 <pre>
 <strong>Input:</strong> pieces = [&quot;queen&quot;], positions = [[1,1]]
 <strong>Output:</strong> 22
@@ -44,7 +44,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a3.png" style="width: 214px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2056.Number%20of%20Valid%20Move%20Combinations%20On%20Chessboard/images/a3.png" style="width: 214px; height: 215px;" />
 <pre>
 <strong>Input:</strong> pieces = [&quot;bishop&quot;], positions = [[4,3]]
 <strong>Output:</strong> 12
diff --git a/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README.md b/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README.md
index 2687f82cf4e49..d7b36d5606700 100644
--- a/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README.md	
+++ b/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a1.png" style="width: 148px; height: 55px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a1.png" style="width: 148px; height: 55px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [3,1]
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a2.png" style="width: 624px; height: 46px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a2.png" style="width: 624px; height: 46px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [5,3,1,2,5,1,2]
@@ -45,7 +45,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a5.png" style="width: 624px; height: 39px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a5.png" style="width: 624px; height: 39px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,3,2,2,3,2,2,2,7]
@@ -60,7 +60,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a4.png" style="width: 345px; height: 52px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a4.png" style="width: 345px; height: 52px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [2,3,3,2]
diff --git a/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README_EN.md b/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README_EN.md
index 9335abfc02c92..cdcfc44fa52c0 100644
--- a/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README_EN.md	
+++ b/solution/2000-2099/2058.Find the Minimum and Maximum Number of Nodes Between Critical Points/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a1.png" style="width: 148px; height: 55px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a1.png" style="width: 148px; height: 55px;" />
 <pre>
 <strong>Input:</strong> head = [3,1]
 <strong>Output:</strong> [-1,-1]
@@ -24,7 +24,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a2.png" style="width: 624px; height: 46px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a2.png" style="width: 624px; height: 46px;" />
 <pre>
 <strong>Input:</strong> head = [5,3,1,2,5,1,2]
 <strong>Output:</strong> [1,3]
@@ -37,7 +37,7 @@ The maximum distance is between the third and the sixth node. maxDistance = 6 -
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a5.png" style="width: 624px; height: 39px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2058.Find%20the%20Minimum%20and%20Maximum%20Number%20of%20Nodes%20Between%20Critical%20Points/images/a5.png" style="width: 624px; height: 39px;" />
 <pre>
 <strong>Input:</strong> head = [1,3,2,2,3,2,2,2,7]
 <strong>Output:</strong> [3,3]
diff --git a/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README.md b/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README.md
index c637b6dd2bbe9..4a06be8a1b97a 100644
--- a/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README.md	
+++ b/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204703-1.png" style="width: 250px; height: 242px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204703-1.png" style="width: 250px; height: 242px;" /></p>
 
 <pre>
 <strong>输入:</strong> room = [[0,0,0],[1,1,0],[0,0,0]]
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>示例 2：</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204736-2.png" style="width: 250px; height: 245px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204736-2.png" style="width: 250px; height: 245px;" /></p>
 
 <pre>
 <strong>输入:</strong> room = [[0,1,0],[1,0,0],[0,0,0]]
diff --git a/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README_EN.md b/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README_EN.md
index 7198a882884f8..23f61df39e209 100644
--- a/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README_EN.md	
+++ b/solution/2000-2099/2061.Number of Spaces Cleaning Robot Cleaned/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204703-1.png" style="width: 250px; height: 242px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204703-1.png" style="width: 250px; height: 242px;" /></p>
 
 <pre>
 <strong>Input:</strong> room = [[0,0,0],[1,1,0],[0,0,0]]
@@ -27,7 +27,7 @@ The robot has cleaned all 7 empty spaces, so return 7.
 </pre>
 
 <p><strong>Example 2:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204736-2.png" style="width: 250px; height: 245px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2061.Number%20of%20Spaces%20Cleaning%20Robot%20Cleaned/images/image-20211101204736-2.png" style="width: 250px; height: 245px;" /></p>
 
 <pre>
 <strong>Input:</strong> room = [[0,1,0],[1,0,0],[0,0,0]]
diff --git a/solution/2000-2099/2065.Maximum Path Quality of a Graph/README.md b/solution/2000-2099/2065.Maximum Path Quality of a Graph/README.md
index b13194ad7c775..de336ba19460d 100644
--- a/solution/2000-2099/2065.Maximum Path Quality of a Graph/README.md	
+++ b/solution/2000-2099/2065.Maximum Path Quality of a Graph/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex1drawio.png" style="width: 269px; height: 170px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex1drawio.png" style="width: 269px; height: 170px;" /></p>
 
 <pre>
 <b>输入：</b>values = [0,32,10,43], edges = [[0,1,10],[1,2,15],[0,3,10]], maxTime = 49
@@ -30,7 +30,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex2drawio.png" style="width: 269px; height: 170px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex2drawio.png" style="width: 269px; height: 170px;" /></p>
 
 <pre>
 <b>输入：</b>values = [5,10,15,20], edges = [[0,1,10],[1,2,10],[0,3,10]], maxTime = 30
@@ -42,7 +42,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex31drawio.png" style="width: 236px; height: 170px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex31drawio.png" style="width: 236px; height: 170px;" /></p>
 
 <pre>
 <b>输入：</b>values = [1,2,3,4], edges = [[0,1,10],[1,2,11],[2,3,12],[1,3,13]], maxTime = 50
@@ -53,7 +53,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><strong><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex4drawio.png" style="width: 270px; height: 71px;" /></strong></p>
+<p><strong><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex4drawio.png" style="width: 270px; height: 71px;" /></strong></p>
 
 <pre>
 <b>输入：</b>values = [0,1,2], edges = [[1,2,10]], maxTime = 10
diff --git a/solution/2000-2099/2065.Maximum Path Quality of a Graph/README_EN.md b/solution/2000-2099/2065.Maximum Path Quality of a Graph/README_EN.md
index 4ac2bc5c16d29..aed6ba0e98434 100644
--- a/solution/2000-2099/2065.Maximum Path Quality of a Graph/README_EN.md	
+++ b/solution/2000-2099/2065.Maximum Path Quality of a Graph/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex1drawio.png" style="width: 269px; height: 170px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex1drawio.png" style="width: 269px; height: 170px;" />
 <pre>
 <strong>Input:</strong> values = [0,32,10,43], edges = [[0,1,10],[1,2,15],[0,3,10]], maxTime = 49
 <strong>Output:</strong> 75
@@ -24,7 +24,7 @@ The nodes visited are 0, 1, and 3, giving a maximal path quality of 0 + 32 + 43
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex2drawio.png" style="width: 269px; height: 170px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex2drawio.png" style="width: 269px; height: 170px;" />
 <pre>
 <strong>Input:</strong> values = [5,10,15,20], edges = [[0,1,10],[1,2,10],[0,3,10]], maxTime = 30
 <strong>Output:</strong> 25
@@ -34,7 +34,7 @@ The nodes visited are 0 and 3, giving a maximal path quality of 5 + 20 = 25.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex31drawio.png" style="width: 236px; height: 170px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2065.Maximum%20Path%20Quality%20of%20a%20Graph/images/ex31drawio.png" style="width: 236px; height: 170px;" />
 <pre>
 <strong>Input:</strong> values = [1,2,3,4], edges = [[0,1,10],[1,2,11],[2,3,12],[1,3,13]], maxTime = 50
 <strong>Output:</strong> 7
diff --git a/solution/2000-2099/2069.Walking Robot Simulation II/README.md b/solution/2000-2099/2069.Walking Robot Simulation II/README.md
index cdd3627493618..ed5393bf28114 100644
--- a/solution/2000-2099/2069.Walking Robot Simulation II/README.md	
+++ b/solution/2000-2099/2069.Walking Robot Simulation II/README.md	
@@ -30,7 +30,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2069.Walking%20Robot%20Simulation%20II/images/example-1.png" style="width: 498px; height: 268px;"></p>
+<p><img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2069.Walking%20Robot%20Simulation%20II/images/example-1.png" style="width: 498px; height: 268px;"></p>
 
 <pre><strong>输入：</strong>
 ["Robot", "move", "move", "getPos", "getDir", "move", "move", "move", "getPos", "getDir"]
diff --git a/solution/2000-2099/2069.Walking Robot Simulation II/README_EN.md b/solution/2000-2099/2069.Walking Robot Simulation II/README_EN.md
index d4afd5b4fb342..6140e402c2693 100644
--- a/solution/2000-2099/2069.Walking Robot Simulation II/README_EN.md	
+++ b/solution/2000-2099/2069.Walking Robot Simulation II/README_EN.md	
@@ -26,7 +26,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="example-1" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2069.Walking%20Robot%20Simulation%20II/images/example-1.png" style="width: 498px; height: 268px;" />
+<img alt="example-1" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2069.Walking%20Robot%20Simulation%20II/images/example-1.png" style="width: 498px; height: 268px;" />
 <pre>
 <strong>Input</strong>
 [&quot;Robot&quot;, &quot;move&quot;, &quot;move&quot;, &quot;getPos&quot;, &quot;getDir&quot;, &quot;move&quot;, &quot;move&quot;, &quot;move&quot;, &quot;getPos&quot;, &quot;getDir&quot;]
diff --git a/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README.md b/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README.md
index 3b74de2ae391d..a2c4e3f0dda99 100644
--- a/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README.md	
+++ b/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README.md	
@@ -24,7 +24,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg1.png" style="width: 699px; height: 124px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg1.png" style="width: 699px; height: 124px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [5,2,6,3,9,1,7,3,8,4]
@@ -38,7 +38,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg2.png" style="width: 284px; height: 114px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg2.png" style="width: 284px; height: 114px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,1,0,6]
@@ -51,7 +51,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg3.png" style="width: 139px; height: 114px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg3.png" style="width: 139px; height: 114px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [2,1]
diff --git a/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README_EN.md b/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README_EN.md
index 3ea1f6cb3969c..f273fee93aacd 100644
--- a/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README_EN.md	
+++ b/solution/2000-2099/2074.Reverse Nodes in Even Length Groups/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg1.png" style="width: 699px; height: 124px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg1.png" style="width: 699px; height: 124px;" />
 <pre>
 <strong>Input:</strong> head = [5,2,6,3,9,1,7,3,8,4]
 <strong>Output:</strong> [5,6,2,3,9,1,4,8,3,7]
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg2.png" style="width: 284px; height: 114px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/eg2.png" style="width: 284px; height: 114px;" />
 <pre>
 <strong>Input:</strong> head = [1,1,0,6]
 <strong>Output:</strong> [1,0,1,6]
@@ -43,7 +43,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/ex3.png" style="width: 348px; height: 114px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2074.Reverse%20Nodes%20in%20Even%20Length%20Groups/images/ex3.png" style="width: 348px; height: 114px;" />
 <pre>
 <strong>Input:</strong> head = [1,1,0,6,5]
 <strong>Output:</strong> [1,0,1,5,6]
diff --git a/solution/2000-2099/2075.Decode the Slanted Ciphertext/README.md b/solution/2000-2099/2075.Decode the Slanted Ciphertext/README.md
index 9d3b86969448d..ef8b2304b7580 100644
--- a/solution/2000-2099/2075.Decode the Slanted Ciphertext/README.md	
+++ b/solution/2000-2099/2075.Decode the Slanted Ciphertext/README.md	
@@ -9,15 +9,15 @@
 <p>字符串 <code>originalText</code> 使用 <strong>斜向换位密码</strong> ，经由 <strong>行数固定</strong> 为 <code>rows</code> 的矩阵辅助，加密得到一个字符串 <code>encodedText</code> 。</p>
 
 <p><code>originalText</code> 先按从左上到右下的方式放置到矩阵中。</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa11.png" style="width: 300px; height: 185px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa11.png" style="width: 300px; height: 185px;" />
 <p>先填充蓝色单元格，接着是红色单元格，然后是黄色单元格，以此类推，直到到达 <code>originalText</code> 末尾。箭头指示顺序即为单元格填充顺序。所有空单元格用 <code>' '</code> 进行填充。矩阵的列数需满足：用 <code>originalText</code> 填充之后，最右侧列 <strong>不为空</strong> 。</p>
 
 <p>接着按行将字符附加到矩阵中，构造&nbsp;<code>encodedText</code> 。</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa12.png" style="width: 300px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa12.png" style="width: 300px; height: 200px;" />
 <p>先把蓝色单元格中的字符附加到 <code>encodedText</code> 中，接着是红色单元格，最后是黄色单元格。箭头指示单元格访问顺序。</p>
 
 <p>例如，如果 <code>originalText = "cipher"</code> 且 <code>rows = 3</code> ，那么我们可以按下述方法将其编码：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/desc2.png" style="width: 281px; height: 211px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/desc2.png" style="width: 281px; height: 211px;" />
 <p>蓝色箭头标识 <code>originalText</code> 是如何放入矩阵中的，红色箭头标识形成 <code>encodedText</code> 的顺序。在上述例子中，<code>encodedText = "ch&nbsp; &nbsp;ie&nbsp; &nbsp;pr"</code> 。</p>
 
 <p>给你编码后的字符串 <code>encodedText</code> 和矩阵的行数 <code>rows</code> ，返回源字符串 <code>originalText</code> 。</p>
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam1.png" style="width: 250px; height: 168px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam1.png" style="width: 250px; height: 168px;" /></p>
 
 <pre>
 <strong>输入：</strong>encodedText = "iveo    eed   l te   olc", rows = 4
@@ -47,7 +47,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/eg2.png" style="width: 300px; height: 51px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/eg2.png" style="width: 300px; height: 51px;" /></p>
 
 <pre>
 <strong>输入：</strong>encodedText = "coding", rows = 1
@@ -56,7 +56,7 @@
 </pre>
 
 <p><strong>示例 4：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam3.png" style="width: 150px; height: 101px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam3.png" style="width: 150px; height: 101px;" />
 <pre>
 <strong>输入：</strong>encodedText = " b  ac", rows = 2
 <strong>输出：</strong>" abc"
diff --git a/solution/2000-2099/2075.Decode the Slanted Ciphertext/README_EN.md b/solution/2000-2099/2075.Decode the Slanted Ciphertext/README_EN.md
index d68c0f634b044..67d6012835993 100644
--- a/solution/2000-2099/2075.Decode the Slanted Ciphertext/README_EN.md	
+++ b/solution/2000-2099/2075.Decode the Slanted Ciphertext/README_EN.md	
@@ -7,15 +7,15 @@
 <p>A string <code>originalText</code> is encoded using a <strong>slanted transposition cipher</strong> to a string <code>encodedText</code> with the help of a matrix having a <strong>fixed number of rows</strong> <code>rows</code>.</p>
 
 <p><code>originalText</code> is placed first in a top-left to bottom-right manner.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa11.png" style="width: 300px; height: 185px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa11.png" style="width: 300px; height: 185px;" />
 <p>The blue cells are filled first, followed by the red cells, then the yellow cells, and so on, until we reach the end of <code>originalText</code>. The arrow indicates the order in which the cells are filled. All empty cells are filled with <code>&#39; &#39;</code>. The number of columns is chosen such that the rightmost column will <strong>not be empty</strong> after filling in <code>originalText</code>.</p>
 
 <p><code>encodedText</code> is then formed by appending all characters of the matrix in a row-wise fashion.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa12.png" style="width: 300px; height: 200px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exa12.png" style="width: 300px; height: 200px;" />
 <p>The characters in the blue cells are appended first to <code>encodedText</code>, then the red cells, and so on, and finally the yellow cells. The arrow indicates the order in which the cells are accessed.</p>
 
 <p>For example, if <code>originalText = &quot;cipher&quot;</code> and <code>rows = 3</code>, then we encode it in the following manner:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/desc2.png" style="width: 281px; height: 211px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/desc2.png" style="width: 281px; height: 211px;" />
 <p>The blue arrows depict how <code>originalText</code> is placed in the matrix, and the red arrows denote the order in which <code>encodedText</code> is formed. In the above example, <code>encodedText = &quot;ch ie pr&quot;</code>.</p>
 
 <p>Given the encoded string <code>encodedText</code> and number of rows <code>rows</code>, return <em>the original string</em> <code>originalText</code>.</p>
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam1.png" style="width: 250px; height: 168px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/exam1.png" style="width: 250px; height: 168px;" />
 <pre>
 <strong>Input:</strong> encodedText = &quot;iveo    eed   l te   olc&quot;, rows = 4
 <strong>Output:</strong> &quot;i love leetcode&quot;
@@ -41,7 +41,7 @@ The blue arrows show how we can find originalText from encodedText.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/eg2.png" style="width: 300px; height: 51px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2075.Decode%20the%20Slanted%20Ciphertext/images/eg2.png" style="width: 300px; height: 51px;" />
 <pre>
 <strong>Input:</strong> encodedText = &quot;coding&quot;, rows = 1
 <strong>Output:</strong> &quot;coding&quot;
diff --git a/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README.md b/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README.md
index 088b5e36f1955..1d2d2f3524da7 100644
--- a/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README.md	
+++ b/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164827-1.png" style="width: 440px; height: 350px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164827-1.png" style="width: 440px; height: 350px;" />
 <pre>
 <strong>Input:</strong> n = 5, corridors = [[1,2],[5,2],[4,1],[2,4],[3,1],[3,4]]
 <strong>Output:</strong> 2
@@ -32,7 +32,7 @@ Thus, there are two different cycles of length 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164851-2.png" style="width: 329px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164851-2.png" style="width: 329px; height: 250px;" />
 <pre>
 <strong>Input:</strong> n = 4, corridors = [[1,2],[3,4]]
 <strong>Output:</strong> 0
diff --git a/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README_EN.md b/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README_EN.md
index 4660c20ce94b3..8a1ad0d2a400c 100644
--- a/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README_EN.md	
+++ b/solution/2000-2099/2077.Paths in Maze That Lead to Same Room/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164827-1.png" style="width: 440px; height: 350px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164827-1.png" style="width: 440px; height: 350px;" />
 <pre>
 <strong>Input:</strong> n = 5, corridors = [[1,2],[5,2],[4,1],[2,4],[3,1],[3,4]]
 <strong>Output:</strong> 2
@@ -30,7 +30,7 @@ Thus, there are two different cycles of length 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164851-2.png" style="width: 329px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2077.Paths%20in%20Maze%20That%20Lead%20to%20Same%20Room/images/image-20211114164851-2.png" style="width: 329px; height: 250px;" />
 <pre>
 <strong>Input:</strong> n = 4, corridors = [[1,2],[3,4]]
 <strong>Output:</strong> 0
diff --git a/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README.md b/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README.md
index 2f1346c60dac7..3b5d9ad43c0e2 100644
--- a/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README.md	
+++ b/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg1.png" style="width: 610px; height: 84px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg1.png" style="width: 610px; height: 84px;" /></p>
 
 <pre>
 <strong>输入：</strong>colors = [<strong><em>1</em></strong>,1,1,<em><strong>6</strong></em>,1,1,1]
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg2.png" style="width: 426px; height: 84px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg2.png" style="width: 426px; height: 84px;" /></p>
 
 <pre>
 <strong>输入：</strong>colors = [<em><strong>1</strong></em>,8,3,8,<em><strong>3</strong></em>]
diff --git a/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README_EN.md b/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README_EN.md
index cb850eedaa295..d9e7a8821648a 100644
--- a/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README_EN.md	
+++ b/solution/2000-2099/2078.Two Furthest Houses With Different Colors/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg1.png" style="width: 610px; height: 84px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg1.png" style="width: 610px; height: 84px;" />
 <pre>
 <strong>Input:</strong> colors = [<u><strong>1</strong></u>,1,1,<strong><u>6</u></strong>,1,1,1]
 <strong>Output:</strong> 3
@@ -23,7 +23,7 @@ Note that houses 3 and 6 can also produce the optimal answer.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg2.png" style="width: 426px; height: 84px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2078.Two%20Furthest%20Houses%20With%20Different%20Colors/images/eg2.png" style="width: 426px; height: 84px;" />
 <pre>
 <strong>Input:</strong> colors = [<u><strong>1</strong></u>,8,3,8,<u><strong>3</strong></u>]
 <strong>Output:</strong> 4
diff --git a/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README.md b/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README.md
index 08520dca74f11..51ba4b2a851b2 100644
--- a/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README.md	
+++ b/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2087.Minimum%20Cost%20Homecoming%20of%20a%20Robot%20in%20a%20Grid/images/eg-1.png" style="width: 282px; height: 217px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2087.Minimum%20Cost%20Homecoming%20of%20a%20Robot%20in%20a%20Grid/images/eg-1.png" style="width: 282px; height: 217px;"></p>
 
 <pre><strong>输入：</strong>startPos = [1, 0], homePos = [2, 3], rowCosts = [5, 4, 3], colCosts = [8, 2, 6, 7]
 <b>输出：</b>18
diff --git a/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README_EN.md b/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README_EN.md
index c360cdbe7098f..bd8da63020f6f 100644
--- a/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README_EN.md	
+++ b/solution/2000-2099/2087.Minimum Cost Homecoming of a Robot in a Grid/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2087.Minimum%20Cost%20Homecoming%20of%20a%20Robot%20in%20a%20Grid/images/eg-1.png" style="width: 282px; height: 217px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2087.Minimum%20Cost%20Homecoming%20of%20a%20Robot%20in%20a%20Grid/images/eg-1.png" style="width: 282px; height: 217px;" />
 <pre>
 <strong>Input:</strong> startPos = [1, 0], homePos = [2, 3], rowCosts = [5, 4, 3], colCosts = [8, 2, 6, 7]
 <strong>Output:</strong> 18
diff --git a/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README.md b/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README.md
index b21c7a6eaef44..254abf24c1f28 100644
--- a/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README.md	
+++ b/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README.md	
@@ -24,7 +24,7 @@
 
 <p>下图展示了部分符合定义和不符合定义的金字塔区域。黑色区域表示肥沃的格子。</p>
 
-<p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/image.png" style="width: 700px; height: 156px;"></p>
+<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/image.png" style="width: 700px; height: 156px;"></p>
 
 <p>给你一个下标从 <strong>0</strong>&nbsp;开始且大小为 <code>m x n</code>&nbsp;的二进制矩阵&nbsp;<code>grid</code>&nbsp;，它表示农场，请你返回 <code>grid</code>&nbsp;中金字塔和倒金字塔的&nbsp;<strong>总数目</strong>&nbsp;。</p>
 
@@ -32,7 +32,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg11.png" style="width: 200px; height: 102px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa12.png" style="width: 200px; height: 102px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa13.png" style="width: 200px; height: 102px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg11.png" style="width: 200px; height: 102px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa12.png" style="width: 200px; height: 102px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa13.png" style="width: 200px; height: 102px;"></p>
 
 <pre><b>输入：</b>grid = [[0,1,1,0],[1,1,1,1]]
 <b>输出：</b>2
@@ -44,7 +44,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg21.png" style="width: 180px; height: 122px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa22.png" style="width: 180px; height: 122px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa23.png" style="width: 180px; height: 122px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg21.png" style="width: 180px; height: 122px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa22.png" style="width: 180px; height: 122px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/exa23.png" style="width: 180px; height: 122px;"></p>
 
 <pre><b>输入：</b>grid = [[1,1,1],[1,1,1]]
 <b>输出：</b>2
@@ -55,7 +55,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg3.png" style="width: 149px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg3.png" style="width: 149px; height: 150px;"></p>
 
 <pre><b>输入：</b>grid = [[1,0,1],[0,0,0],[1,0,1]]
 <b>输出：</b>0
@@ -65,7 +65,7 @@
 
 <p><strong>示例 4：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg41.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg42.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg43.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg44.png" style="width: 180px; height: 144px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg41.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg42.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg43.png" style="width: 180px; height: 144px;">&nbsp;<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/eg44.png" style="width: 180px; height: 144px;"></p>
 
 <pre><strong>输入：</strong>grid = [[1,1,1,1,0],[1,1,1,1,1],[1,1,1,1,1],[0,1,0,0,1]]
 <b>输出：</b>13
diff --git a/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README_EN.md b/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README_EN.md
index 9a70528da38bc..73623ed8d58a0 100644
--- a/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README_EN.md	
+++ b/solution/2000-2099/2088.Count Fertile Pyramids in a Land/README_EN.md	
@@ -21,12 +21,12 @@
 </ol>
 
 <p>Some examples of valid and invalid pyramidal (and inverse pyramidal) plots are shown below. Black cells indicate fertile cells.</p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/image.png" style="width: 700px; height: 156px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/image.png" style="width: 700px; height: 156px;" />
 <p>Given a <strong>0-indexed</strong> <code>m x n</code> binary matrix <code>grid</code> representing the farmland, return <em>the <strong>total number</strong> of pyramidal and inverse pyramidal plots that can be found in</em> <code>grid</code>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/1.jpg" style="width: 575px; height: 109px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/1.jpg" style="width: 575px; height: 109px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,1,0],[1,1,1,1]]
 <strong>Output:</strong> 2
@@ -36,7 +36,7 @@ Hence total number of pyramidal and inverse pyramidal plots is 2 + 0 = 2.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/2.jpg" style="width: 502px; height: 120px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/2.jpg" style="width: 502px; height: 120px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[1,1,1]]
 <strong>Output:</strong> 2
@@ -45,7 +45,7 @@ Hence the total number of plots is 1 + 1 = 2.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/3.jpg" style="width: 676px; height: 148px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2088.Count%20Fertile%20Pyramids%20in%20a%20Land/images/3.jpg" style="width: 676px; height: 148px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1,1,0],[1,1,1,1,1],[1,1,1,1,1],[0,1,0,0,1]]
 <strong>Output:</strong> 13
diff --git a/solution/2000-2099/2090.K Radius Subarray Averages/README.md b/solution/2000-2099/2090.K Radius Subarray Averages/README.md
index 6887d1b4bb650..adf885847e640 100644
--- a/solution/2000-2099/2090.K Radius Subarray Averages/README.md	
+++ b/solution/2000-2099/2090.K Radius Subarray Averages/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2090.K%20Radius%20Subarray%20Averages/images/eg1.png" style="width: 343px; height: 119px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2090.K%20Radius%20Subarray%20Averages/images/eg1.png" style="width: 343px; height: 119px;" /></p>
 
 <pre>
 <strong>输入：</strong>nums = [7,4,3,9,1,8,5,2,6], k = 3
diff --git a/solution/2000-2099/2090.K Radius Subarray Averages/README_EN.md b/solution/2000-2099/2090.K Radius Subarray Averages/README_EN.md
index af84c3e5f9d04..a535a20fcf77e 100644
--- a/solution/2000-2099/2090.K Radius Subarray Averages/README_EN.md	
+++ b/solution/2000-2099/2090.K Radius Subarray Averages/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2090.K%20Radius%20Subarray%20Averages/images/eg1.png" style="width: 343px; height: 119px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2090.K%20Radius%20Subarray%20Averages/images/eg1.png" style="width: 343px; height: 119px;" />
 <pre>
 <strong>Input:</strong> nums = [7,4,3,9,1,8,5,2,6], k = 3
 <strong>Output:</strong> [-1,-1,-1,5,4,4,-1,-1,-1]
diff --git a/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README.md b/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README.md
index b6e0fae6db02a..e7e64730dc408 100644
--- a/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README.md	
+++ b/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222429-1.png" style="height: 250px; width: 404px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222429-1.png" style="height: 250px; width: 404px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 5, highways = [[0,1,4],[2,1,3],[1,4,11],[3,2,3],[3,4,2]], discounts = 1
@@ -26,7 +26,7 @@ The minimum cost to go from 0 to 4 is 4 + 5 = 9.
 </pre>
 
 <p><strong>Example 2:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222650-4.png" style="width: 284px; height: 250px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222650-4.png" style="width: 284px; height: 250px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4, highways = [[1,3,17],[1,2,7],[3,2,5],[0,1,6],[3,0,20]], discounts = 20
@@ -39,7 +39,7 @@ The minimum cost to go from 0 to 3 is 3 + 3 + 2 = 8.
 </pre>
 
 <p><strong>Example 3:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222531-3.png" style="width: 275px; height: 250px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222531-3.png" style="width: 275px; height: 250px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4, highways = [[0,1,3],[2,3,2]], discounts = 0
diff --git a/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README_EN.md b/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README_EN.md
index d7161589f9016..a06a71b3aa3a9 100644
--- a/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README_EN.md	
+++ b/solution/2000-2099/2093.Minimum Cost to Reach City With Discounts/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222429-1.png" style="height: 250px; width: 404px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222429-1.png" style="height: 250px; width: 404px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 5, highways = [[0,1,4],[2,1,3],[1,4,11],[3,2,3],[3,4,2]], discounts = 1
@@ -24,7 +24,7 @@ The minimum cost to go from 0 to 4 is 4 + 5 = 9.
 </pre>
 
 <p><strong>Example 2:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222650-4.png" style="width: 284px; height: 250px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222650-4.png" style="width: 284px; height: 250px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4, highways = [[1,3,17],[1,2,7],[3,2,5],[0,1,6],[3,0,20]], discounts = 20
@@ -37,7 +37,7 @@ The minimum cost to go from 0 to 3 is 3 + 3 + 2 = 8.
 </pre>
 
 <p><strong>Example 3:</strong><br />
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222531-3.png" style="width: 275px; height: 250px;" /></p>
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2093.Minimum%20Cost%20to%20Reach%20City%20With%20Discounts/images/image-20211129222531-3.png" style="width: 275px; height: 250px;" /></p>
 
 <pre>
 <strong>Input:</strong> n = 4, highways = [[0,1,3],[2,3,2]], discounts = 0
diff --git a/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README.md b/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README.md
index 497a78f2f1473..07aaf04303e4a 100644
--- a/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README.md	
+++ b/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 500px; height: 77px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 500px; height: 77px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,3,4,7,1,2,6]
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 43px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 43px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [1,2,3,4]
@@ -43,7 +43,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 150px; height: 58px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 150px; height: 58px;" /></p>
 
 <pre>
 <strong>输入：</strong>head = [2,1]
diff --git a/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README_EN.md b/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README_EN.md
index 84b8d413482a5..67a0605debdc3 100644
--- a/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README_EN.md	
+++ b/solution/2000-2099/2095.Delete the Middle Node of a Linked List/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 500px; height: 77px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 500px; height: 77px;" />
 <pre>
 <strong>Input:</strong> head = [1,3,4,7,1,2,6]
 <strong>Output:</strong> [1,3,4,1,2,6]
@@ -25,7 +25,7 @@ We return the new list after removing this node.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 43px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 43px;" />
 <pre>
 <strong>Input:</strong> head = [1,2,3,4]
 <strong>Output:</strong> [1,2,4]
@@ -35,7 +35,7 @@ For n = 4, node 2 with value 3 is the middle node, which is marked in red.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 150px; height: 58px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2095.Delete%20the%20Middle%20Node%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 150px; height: 58px;" />
 <pre>
 <strong>Input:</strong> head = [2,1]
 <strong>Output:</strong> [2]
diff --git a/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README.md b/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README.md
index d66980554521c..af223367c51aa 100644
--- a/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README.md	
+++ b/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README.md	
@@ -22,7 +22,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg1.png" style="width: 214px; height: 163px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg1.png" style="width: 214px; height: 163px;"></p>
 
 <pre><b>输入：</b>root = [5,1,2,3,null,6,4], startValue = 3, destValue = 6
 <b>输出：</b>"UURL"
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg2.png" style="width: 74px; height: 102px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg2.png" style="width: 74px; height: 102px;"></p>
 
 <pre><b>输入：</b>root = [2,1], startValue = 2, destValue = 1
 <b>输出：</b>"L"
diff --git a/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README_EN.md b/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README_EN.md
index c04920586054f..60c386c0a9978 100644
--- a/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README_EN.md	
+++ b/solution/2000-2099/2096.Step-By-Step Directions From a Binary Tree Node to Another/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg1.png" style="width: 214px; height: 163px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg1.png" style="width: 214px; height: 163px;" />
 <pre>
 <strong>Input:</strong> root = [5,1,2,3,null,6,4], startValue = 3, destValue = 6
 <strong>Output:</strong> &quot;UURL&quot;
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg2.png" style="width: 74px; height: 102px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2000-2099/2096.Step-By-Step%20Directions%20From%20a%20Binary%20Tree%20Node%20to%20Another/images/eg2.png" style="width: 74px; height: 102px;" />
 <pre>
 <strong>Input:</strong> root = [2,1], startValue = 2, destValue = 1
 <strong>Output:</strong> &quot;L&quot;
diff --git a/solution/2100-2199/2101.Detonate the Maximum Bombs/README.md b/solution/2100-2199/2101.Detonate the Maximum Bombs/README.md
index 6890fcd5a7a56..97c9897134b73 100644
--- a/solution/2100-2199/2101.Detonate the Maximum Bombs/README.md	
+++ b/solution/2100-2199/2101.Detonate the Maximum Bombs/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-3.png" style="width: 300px; height: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-3.png" style="width: 300px; height: 300px;"></p>
 
 <pre><b>输入：</b>bombs = [[2,1,3],[6,1,4]]
 <b>输出：</b>2
@@ -31,7 +31,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-2.png" style="width: 300px; height: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-2.png" style="width: 300px; height: 300px;"></p>
 
 <pre><b>输入：</b>bombs = [[1,1,5],[10,10,5]]
 <b>输出：</b>1
@@ -41,7 +41,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg1.png" style="width: 300px; height: 300px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg1.png" style="width: 300px; height: 300px;"></p>
 
 <pre><b>输入：</b>bombs = [[1,2,3],[2,3,1],[3,4,2],[4,5,3],[5,6,4]]
 <b>输出：</b>5
diff --git a/solution/2100-2199/2101.Detonate the Maximum Bombs/README_EN.md b/solution/2100-2199/2101.Detonate the Maximum Bombs/README_EN.md
index 2db68ca48ec63..54bd3d5cce1a4 100644
--- a/solution/2100-2199/2101.Detonate the Maximum Bombs/README_EN.md	
+++ b/solution/2100-2199/2101.Detonate the Maximum Bombs/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-3.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-3.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> bombs = [[2,1,3],[6,1,4]]
 <strong>Output:</strong> 2
@@ -26,7 +26,7 @@ So the maximum bombs that can be detonated is max(1, 2) = 2.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-2.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg-2.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> bombs = [[1,1,5],[10,10,5]]
 <strong>Output:</strong> 1
@@ -35,7 +35,7 @@ So the maximum bombs that can be detonated is max(1, 2) = 2.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg1.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2101.Detonate%20the%20Maximum%20Bombs/images/desmos-eg1.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> bombs = [[1,2,3],[2,3,1],[3,4,2],[4,5,3],[5,6,4]]
 <strong>Output:</strong> 5
diff --git a/solution/2100-2199/2103.Rings and Rods/README.md b/solution/2100-2199/2103.Rings and Rods/README.md
index bc9deeeb9ca37..8eff11b39a481 100644
--- a/solution/2100-2199/2103.Rings and Rods/README.md	
+++ b/solution/2100-2199/2103.Rings and Rods/README.md	
@@ -22,7 +22,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex1final.png" style="width: 258px; height: 130px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex1final.png" style="width: 258px; height: 130px;">
 <pre><strong>输入：</strong>rings = "B0B6G0R6R0R6G9"
 <strong>输出：</strong>1
 <strong>解释：</strong>
@@ -33,7 +33,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex2final.png" style="width: 266px; height: 130px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex2final.png" style="width: 266px; height: 130px;">
 <pre><strong>输入：</strong>rings = "B0R0G0R9R0B0G0"
 <strong>输出：</strong>1
 <strong>解释：</strong>
diff --git a/solution/2100-2199/2103.Rings and Rods/README_EN.md b/solution/2100-2199/2103.Rings and Rods/README_EN.md
index eb40a30588363..3b039b1715b4c 100644
--- a/solution/2100-2199/2103.Rings and Rods/README_EN.md	
+++ b/solution/2100-2199/2103.Rings and Rods/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex1final.png" style="width: 258px; height: 130px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex1final.png" style="width: 258px; height: 130px;" />
 <pre>
 <strong>Input:</strong> rings = &quot;B0B6G0R6R0R6G9&quot;
 <strong>Output:</strong> 1
@@ -31,7 +31,7 @@ Thus, the number of rods with all three colors is 1.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex2final.png" style="width: 266px; height: 130px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2103.Rings%20and%20Rods/images/ex2final.png" style="width: 266px; height: 130px;" />
 <pre>
 <strong>Input:</strong> rings = &quot;B0R0G0R9R0B0G0&quot;
 <strong>Output:</strong> 1
diff --git a/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README.md b/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README.md
index e5403a3584383..e380098c6560e 100644
--- a/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README.md	
+++ b/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/1.png" style="width: 472px; height: 115px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/1.png" style="width: 472px; height: 115px;">
 <pre><strong>输入：</strong>fruits = [[2,8],[6,3],[8,6]], startPos = 5, k = 4
 <strong>输出：</strong>9
 <strong>解释：</strong>
@@ -26,7 +26,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/2.png" style="width: 512px; height: 129px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/2.png" style="width: 512px; height: 129px;">
 <pre><strong>输入：</strong>fruits = [[0,9],[4,1],[5,7],[6,2],[7,4],[10,9]], startPos = 5, k = 4
 <strong>输出：</strong>14
 <strong>解释：</strong>
@@ -40,7 +40,7 @@
 </pre>
 
 <p><strong>示例 3：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/3.png" style="width: 476px; height: 100px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/3.png" style="width: 476px; height: 100px;">
 <pre><strong>输入：</strong>fruits = [[0,3],[6,4],[8,5]], startPos = 3, k = 2
 <strong>输出：</strong>0
 <strong>解释：</strong>
diff --git a/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README_EN.md b/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README_EN.md
index ccdf2d97b82bd..3bb55e83bc5b4 100644
--- a/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README_EN.md	
+++ b/solution/2100-2199/2106.Maximum Fruits Harvested After at Most K Steps/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/1.png" style="width: 472px; height: 115px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/1.png" style="width: 472px; height: 115px;" />
 <pre>
 <strong>Input:</strong> fruits = [[2,8],[6,3],[8,6]], startPos = 5, k = 4
 <strong>Output:</strong> 9
@@ -24,7 +24,7 @@ You moved 3 steps and harvested 3 + 6 = 9 fruits in total.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/2.png" style="width: 512px; height: 129px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/2.png" style="width: 512px; height: 129px;" />
 <pre>
 <strong>Input:</strong> fruits = [[0,9],[4,1],[5,7],[6,2],[7,4],[10,9]], startPos = 5, k = 4
 <strong>Output:</strong> 14
@@ -39,7 +39,7 @@ You moved 1 + 3 = 4 steps and harvested 7 + 1 + 2 + 4 = 14 fruits in total.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/3.png" style="width: 476px; height: 100px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2106.Maximum%20Fruits%20Harvested%20After%20at%20Most%20K%20Steps/images/3.png" style="width: 476px; height: 100px;" />
 <pre>
 <strong>Input:</strong> fruits = [[0,3],[6,4],[8,5]], startPos = 3, k = 2
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README.md b/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README.md
index eabf72ca4c6ec..482579e6119ab 100644
--- a/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README.md	
+++ b/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README.md	
@@ -27,7 +27,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2116.Check%20if%20a%20Parentheses%20String%20Can%20Be%20Valid/images/eg1.png" style="width: 311px; height: 101px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2116.Check%20if%20a%20Parentheses%20String%20Can%20Be%20Valid/images/eg1.png" style="width: 311px; height: 101px;" /></p>
 
 <pre>
 <b>输入：</b>s = "))()))", locked = "010100"
diff --git a/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README_EN.md b/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README_EN.md
index f7f2d66d9a628..f669dc3bc1edd 100644
--- a/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README_EN.md	
+++ b/solution/2100-2199/2116.Check if a Parentheses String Can Be Valid/README_EN.md	
@@ -23,7 +23,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2116.Check%20if%20a%20Parentheses%20String%20Can%20Be%20Valid/images/eg1.png" style="width: 311px; height: 101px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2116.Check%20if%20a%20Parentheses%20String%20Can%20Be%20Valid/images/eg1.png" style="width: 311px; height: 101px;" />
 <pre>
 <strong>Input:</strong> s = &quot;))()))&quot;, locked = &quot;010100&quot;
 <strong>Output:</strong> true
diff --git a/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README.md b/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README.md
index d5d0a244afabb..c4d80c9e9c797 100644
--- a/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README.md	
+++ b/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/1.png" style="width: 145px; height: 142px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/1.png" style="width: 145px; height: 142px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 3, startPos = [0,1], s = "RRDDLU"
@@ -39,7 +39,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/2.png" style="width: 106px; height: 103px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/2.png" style="width: 106px; height: 103px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 2, startPos = [1,1], s = "LURD"
@@ -53,7 +53,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/3.png" style="width: 67px; height: 64px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/3.png" style="width: 67px; height: 64px;" /></p>
 
 <pre>
 <strong>输入：</strong>n = 1, startPos = [0,0], s = "LRUD"
diff --git a/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README_EN.md b/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README_EN.md
index 5c00e11a22885..7415f893da940 100644
--- a/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README_EN.md	
+++ b/solution/2100-2199/2120.Execution of All Suffix Instructions Staying in a Grid/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/1.png" style="width: 145px; height: 142px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/1.png" style="width: 145px; height: 142px;" />
 <pre>
 <strong>Input:</strong> n = 3, startPos = [0,1], s = &quot;RRDDLU&quot;
 <strong>Output:</strong> [1,5,4,3,1,0]
@@ -33,7 +33,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/2.png" style="width: 106px; height: 103px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/2.png" style="width: 106px; height: 103px;" />
 <pre>
 <strong>Input:</strong> n = 2, startPos = [1,1], s = &quot;LURD&quot;
 <strong>Output:</strong> [4,1,0,0]
@@ -45,7 +45,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/3.png" style="width: 67px; height: 64px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2120.Execution%20of%20All%20Suffix%20Instructions%20Staying%20in%20a%20Grid/images/3.png" style="width: 67px; height: 64px;" />
 <pre>
 <strong>Input:</strong> n = 1, startPos = [0,0], s = &quot;LRUD&quot;
 <strong>Output:</strong> [0,0,0,0]
diff --git a/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README.md b/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README.md
index a596651f98ea7..63a453f35eb09 100644
--- a/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README.md	
+++ b/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181501-1.png" style="width: 644px; height: 250px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181501-1.png" style="width: 644px; height: 250px;">
 <pre><strong>输入:</strong> grid = [[1,1,0],[0,1,1],[1,1,1]]
 <strong>输出:</strong> 3
 <strong>解释:</strong> 可以进行三次操作（把 grid[0][1], grid[1][2] 和 grid[2][1] 变成 0）。
@@ -23,14 +23,14 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181518-2.png" style="height: 250px; width: 255px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181518-2.png" style="height: 250px; width: 255px;">
 <pre><strong>输入:</strong> grid = [[0,0,0],[0,0,0],[0,0,0]]
 <strong>输出:</strong> 0
 <strong>解释:</strong> 矩阵中没有 1，此时矩阵也是完全独立的，因此无需操作，返回 0。
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181817-3.png" style="width: 165px; height: 167px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181817-3.png" style="width: 165px; height: 167px;">
 <pre><strong>输入:</strong> grid = [[0,1],[1,0]]
 <strong>输出:</strong> 0
 <strong>解释:</strong> 矩阵中的所有的 1 与其它 1 均不相邻，已经是完全独立的，因此无需操作，返回 0。
diff --git a/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README_EN.md b/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README_EN.md
index fa64fd3c74887..ed4723dc2766c 100644
--- a/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README_EN.md	
+++ b/solution/2100-2199/2123.Minimum Operations to Remove Adjacent Ones in Matrix/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181501-1.png" style="width: 644px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181501-1.png" style="width: 644px; height: 250px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0],[0,1,1],[1,1,1]]
 <strong>Output:</strong> 3
@@ -21,7 +21,7 @@ After, no more 1&#39;s are 4-directionally connected and grid is well-isolated.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181518-2.png" style="height: 250px; width: 255px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181518-2.png" style="height: 250px; width: 255px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0],[0,0,0],[0,0,0]]
 <strong>Output:</strong> 0
@@ -30,7 +30,7 @@ No operations were done so return 0.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181817-3.png" style="width: 165px; height: 167px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2123.Minimum%20Operations%20to%20Remove%20Adjacent%20Ones%20in%20Matrix/images/image-20211223181817-3.png" style="width: 165px; height: 167px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1],[1,0]]
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2125.Number of Laser Beams in a Bank/README.md b/solution/2100-2199/2125.Number of Laser Beams in a Bank/README.md
index 9e04d2f901cf3..4bbe15f33e51e 100644
--- a/solution/2100-2199/2125.Number of Laser Beams in a Bank/README.md	
+++ b/solution/2100-2199/2125.Number of Laser Beams in a Bank/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser1.jpg" style="width: 400px; height: 368px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser1.jpg" style="width: 400px; height: 368px;" /></p>
 
 <pre>
 <strong>输入：</strong>bank = ["011001","000000","010100","001000"]
@@ -43,7 +43,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser2.jpg" style="width: 244px; height: 325px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser2.jpg" style="width: 244px; height: 325px;" /></p>
 
 <pre>
 <strong>输入：</strong>bank = ["000","111","000"]
diff --git a/solution/2100-2199/2125.Number of Laser Beams in a Bank/README_EN.md b/solution/2100-2199/2125.Number of Laser Beams in a Bank/README_EN.md
index 1457abd97978e..24a1dd6c27c32 100644
--- a/solution/2100-2199/2125.Number of Laser Beams in a Bank/README_EN.md	
+++ b/solution/2100-2199/2125.Number of Laser Beams in a Bank/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser1.jpg" style="width: 400px; height: 368px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser1.jpg" style="width: 400px; height: 368px;" />
 <pre>
 <strong>Input:</strong> bank = [&quot;011001&quot;,&quot;000000&quot;,&quot;010100&quot;,&quot;001000&quot;]
 <strong>Output:</strong> 8
@@ -37,7 +37,7 @@ This is because the 2<sup>nd</sup> row contains security devices, which breaks t
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser2.jpg" style="width: 244px; height: 325px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2125.Number%20of%20Laser%20Beams%20in%20a%20Bank/images/laser2.jpg" style="width: 244px; height: 325px;" />
 <pre>
 <strong>Input:</strong> bank = [&quot;000&quot;,&quot;111&quot;,&quot;000&quot;]
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README.md b/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README.md
index 40ee56c0e3550..6e5164dde8f85 100644
--- a/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README.md	
+++ b/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex1.png" style="width: 236px; height: 195px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex1.png" style="width: 236px; height: 195px;"></p>
 
 <pre><b>输入：</b>favorite = [2,2,1,2]
 <b>输出：</b>3
@@ -42,7 +42,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex2.png" style="width: 219px; height: 220px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex2.png" style="width: 219px; height: 220px;"></p>
 
 <pre><b>输入：</b>favorite = [3,0,1,4,1]
 <b>输出：</b>4
diff --git a/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README_EN.md b/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README_EN.md
index 71270ce8829ae..c8521cb486095 100644
--- a/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README_EN.md	
+++ b/solution/2100-2199/2127.Maximum Employees to Be Invited to a Meeting/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex1.png" style="width: 236px; height: 195px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex1.png" style="width: 236px; height: 195px;" />
 <pre>
 <strong>Input:</strong> favorite = [2,2,1,2]
 <strong>Output:</strong> 3
@@ -38,7 +38,7 @@ The maximum number of employees that can be invited to the meeting is 3.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex2.png" style="width: 219px; height: 220px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2127.Maximum%20Employees%20to%20Be%20Invited%20to%20a%20Meeting/images/ex2.png" style="width: 219px; height: 220px;" />
 <pre>
 <strong>Input:</strong> favorite = [3,0,1,4,1]
 <strong>Output:</strong> 4
diff --git a/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README.md b/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README.md
index cc63008538d1e..eb95c275c8232 100644
--- a/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README.md	
+++ b/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103191300-1.png" style="width: 756px; height: 225px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103191300-1.png" style="width: 756px; height: 225px;">
 <pre><strong>输入:</strong> grid = [[0,1,0],[1,0,1],[0,1,0]]
 <strong>输出:</strong> true
 <strong>解释:</strong> 一种去除所有 1 的可行方法是:
@@ -24,14 +24,14 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181204-7.png" style="width: 237px; height: 225px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181204-7.png" style="width: 237px; height: 225px;">
 <pre><strong>输入:</strong> grid = [[1,1,0],[0,0,0],[0,0,0]]
 <strong>输出:</strong> false
 <strong>解释:</strong> 不可能去除矩阵中所有的 1。
 </pre>
 
 <p><strong>示例 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181224-8.png" style="width: 114px; height: 100px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181224-8.png" style="width: 114px; height: 100px;">
 <pre><strong>输入:</strong> grid = [[0]]
 <strong>输出:</strong> true
 <strong>解释:</strong> 矩阵中不存在 1，已经符合要求。
diff --git a/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README_EN.md b/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README_EN.md
index 2606277b4233f..c4ed53c74cb61 100644
--- a/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README_EN.md	
+++ b/solution/2100-2199/2128.Remove All Ones With Row and Column Flips/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103191300-1.png" style="width: 756px; height: 225px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103191300-1.png" style="width: 756px; height: 225px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,0],[1,0,1],[0,1,0]]
 <strong>Output:</strong> true
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181204-7.png" style="width: 237px; height: 225px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181204-7.png" style="width: 237px; height: 225px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,0],[0,0,0],[0,0,0]]
 <strong>Output:</strong> false
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181224-8.png" style="width: 114px; height: 100px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2128.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips/images/image-20220103181224-8.png" style="width: 114px; height: 100px;" />
 <pre>
 <strong>Input:</strong> grid = [[0]]
 <strong>Output:</strong> true
diff --git a/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README.md b/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README.md
index 746101c3d7293..9f1f36a6ce70b 100644
--- a/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README.md	
+++ b/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例&nbsp;1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 250px; height: 70px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 250px; height: 70px;"></p>
 
 <pre><b>输入：</b>head = [5,4,2,1]
 <b>输出：</b>6
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 70px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 70px;"></p>
 
 <pre><b>输入：</b>head = [4,2,2,3]
 <b>输出：</b>7
@@ -45,7 +45,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 200px; height: 88px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 200px; height: 88px;"></p>
 
 <pre><b>输入：</b>head = [1,100000]
 <b>输出：</b>100001
diff --git a/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README_EN.md b/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README_EN.md
index 36b3abcf3fc5c..f2c970cf0b1df 100644
--- a/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README_EN.md	
+++ b/solution/2100-2199/2130.Maximum Twin Sum of a Linked List/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 250px; height: 70px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg1drawio.png" style="width: 250px; height: 70px;" />
 <pre>
 <strong>Input:</strong> head = [5,4,2,1]
 <strong>Output:</strong> 6
@@ -27,7 +27,7 @@ Thus, the maximum twin sum of the linked list is 6.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 70px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg2drawio.png" style="width: 250px; height: 70px;" />
 <pre>
 <strong>Input:</strong> head = [4,2,2,3]
 <strong>Output:</strong> 7
@@ -39,7 +39,7 @@ Thus, the maximum twin sum of the linked list is max(7, 4) = 7.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 200px; height: 88px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2130.Maximum%20Twin%20Sum%20of%20a%20Linked%20List/images/eg3drawio.png" style="width: 200px; height: 88px;" />
 <pre>
 <strong>Input:</strong> head = [1,100000]
 <strong>Output:</strong> 100001
diff --git a/solution/2100-2199/2132.Stamping the Grid/README.md b/solution/2100-2199/2132.Stamping the Grid/README.md
index ddbfaefe75dcc..222dd49cc2451 100644
--- a/solution/2100-2199/2132.Stamping the Grid/README.md	
+++ b/solution/2100-2199/2132.Stamping the Grid/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex1.png" style="width: 180px; height: 237px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex1.png" style="width: 180px; height: 237px;"></p>
 
 <pre><b>输入：</b>grid = [[1,0,0,0],[1,0,0,0],[1,0,0,0],[1,0,0,0],[1,0,0,0]], stampHeight = 4, stampWidth = 3
 <b>输出：</b>true
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex2.png" style="width: 170px; height: 179px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex2.png" style="width: 170px; height: 179px;"></p>
 
 <pre><b>输入：</b>grid = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]], stampHeight = 2, stampWidth = 2 
 <b>输出：</b>false 
diff --git a/solution/2100-2199/2132.Stamping the Grid/README_EN.md b/solution/2100-2199/2132.Stamping the Grid/README_EN.md
index b717720f383e9..78b3f785d75a0 100644
--- a/solution/2100-2199/2132.Stamping the Grid/README_EN.md	
+++ b/solution/2100-2199/2132.Stamping the Grid/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex1.png" style="width: 180px; height: 237px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex1.png" style="width: 180px; height: 237px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0],[1,0,0,0],[1,0,0,0],[1,0,0,0],[1,0,0,0]], stampHeight = 4, stampWidth = 3
 <strong>Output:</strong> true
@@ -29,7 +29,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex2.png" style="width: 170px; height: 179px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2132.Stamping%20the%20Grid/images/ex2.png" style="width: 170px; height: 179px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]], stampHeight = 2, stampWidth = 2 
 <strong>Output:</strong> false 
diff --git a/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README.md b/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README.md
index 4b4da18d0beae..685b30b255dd3 100644
--- a/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README.md	
+++ b/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example1drawio.png" style="width: 250px; height: 251px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example1drawio.png" style="width: 250px; height: 251px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[1,2,3],[3,1,2],[2,3,1]]
@@ -25,7 +25,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example2drawio.png" style="width: 250px; height: 251px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example2drawio.png" style="width: 250px; height: 251px;" /></p>
 
 <pre>
 <strong>输入：</strong>matrix = [[1,1,1],[1,2,3],[1,2,3]]
diff --git a/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README_EN.md b/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README_EN.md
index ce06621632c18..1527c98d31f65 100644
--- a/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README_EN.md	
+++ b/solution/2100-2199/2133.Check if Every Row and Column Contains All Numbers/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example1drawio.png" style="width: 250px; height: 251px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example1drawio.png" style="width: 250px; height: 251px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,2,3],[3,1,2],[2,3,1]]
 <strong>Output:</strong> true
@@ -19,7 +19,7 @@ Hence, we return true.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example2drawio.png" style="width: 250px; height: 251px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2133.Check%20if%20Every%20Row%20and%20Column%20Contains%20All%20Numbers/images/example2drawio.png" style="width: 250px; height: 251px;" />
 <pre>
 <strong>Input:</strong> matrix = [[1,1,1],[1,2,3],[1,2,3]]
 <strong>Output:</strong> false
diff --git a/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README.md b/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README.md
index a0c47cd585775..128d2a13aec30 100644
--- a/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README.md	
+++ b/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README.md	
@@ -20,7 +20,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/1.png" style="width: 453px; height: 149px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/1.png" style="width: 453px; height: 149px;">
 <pre><strong>输入：</strong>plantTime = [1,4,3], growTime = [2,3,1]
 <strong>输出：</strong>9
 <strong>解释：</strong>灰色的花盆表示播种的日子，彩色的花盆表示生长的日子，花朵表示开花的日子。
@@ -32,7 +32,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/2.png" style="width: 454px; height: 184px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/2.png" style="width: 454px; height: 184px;">
 <pre><strong>输入：</strong>plantTime = [1,2,3,2], growTime = [2,1,2,1]
 <strong>输出：</strong>9
 <strong>解释：</strong>灰色的花盆表示播种的日子，彩色的花盆表示生长的日子，花朵表示开花的日子。 
diff --git a/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README_EN.md b/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README_EN.md
index 31c9242304f10..27b0fce006c11 100644
--- a/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README_EN.md	
+++ b/solution/2100-2199/2136.Earliest Possible Day of Full Bloom/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/1.png" style="width: 453px; height: 149px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/1.png" style="width: 453px; height: 149px;" />
 <pre>
 <strong>Input:</strong> plantTime = [1,4,3], growTime = [2,3,1]
 <strong>Output:</strong> 9
@@ -30,7 +30,7 @@ Thus, on day 9, all the seeds are blooming.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/2.png" style="width: 454px; height: 184px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2136.Earliest%20Possible%20Day%20of%20Full%20Bloom/images/2.png" style="width: 454px; height: 184px;" />
 <pre>
 <strong>Input:</strong> plantTime = [1,2,3,2], growTime = [2,1,2,1]
 <strong>Output:</strong> 9
diff --git a/solution/2100-2199/2141.Maximum Running Time of N Computers/README.md b/solution/2100-2199/2141.Maximum Running Time of N Computers/README.md
index 528efb7e91464..dea0a3d05ea33 100644
--- a/solution/2100-2199/2141.Maximum Running Time of N Computers/README.md	
+++ b/solution/2100-2199/2141.Maximum Running Time of N Computers/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example1-fit.png" style="width: 762px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example1-fit.png" style="width: 762px; height: 150px;"></p>
 
 <pre><b>输入：</b>n = 2, batteries = [3,3,3]
 <b>输出：</b>4
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example2.png" style="width: 629px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example2.png" style="width: 629px; height: 150px;"></p>
 
 <pre><b>输入：</b>n = 2, batteries = [1,1,1,1]
 <b>输出：</b>2
diff --git a/solution/2100-2199/2141.Maximum Running Time of N Computers/README_EN.md b/solution/2100-2199/2141.Maximum Running Time of N Computers/README_EN.md
index c3871717aa5f5..7d88e6677e513 100644
--- a/solution/2100-2199/2141.Maximum Running Time of N Computers/README_EN.md	
+++ b/solution/2100-2199/2141.Maximum Running Time of N Computers/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example1-fit.png" style="width: 762px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example1-fit.png" style="width: 762px; height: 150px;" />
 <pre>
 <strong>Input:</strong> n = 2, batteries = [3,3,3]
 <strong>Output:</strong> 4
@@ -28,7 +28,7 @@ We can run the two computers simultaneously for at most 4 minutes, so we return
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example2.png" style="width: 629px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2141.Maximum%20Running%20Time%20of%20N%20Computers/images/example2.png" style="width: 629px; height: 150px;" />
 <pre>
 <strong>Input:</strong> n = 2, batteries = [1,1,1,1]
 <strong>Output:</strong> 2
diff --git a/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README.md b/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README.md
index 4cc1584927806..adb569c2aee88 100644
--- a/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README.md	
+++ b/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README.md	
@@ -33,7 +33,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example1drawio.png" style="width: 200px; height: 151px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example1drawio.png" style="width: 200px; height: 151px;"></p>
 
 <pre><b>输入：</b>grid = [[1,2,0,1],[1,3,0,1],[0,2,5,1]], pricing = [2,5], start = [0,0], k = 3
 <b>输出：</b>[[0,1],[1,1],[2,1]]
@@ -49,7 +49,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example2drawio1.png" style="width: 200px; height: 151px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example2drawio1.png" style="width: 200px; height: 151px;"></p>
 
 <pre><b>输入：</b>grid = [[1,2,0,1],[1,3,3,1],[0,2,5,1]], pricing = [2,3], start = [2,3], k = 2
 <b>输出：</b>[[2,1],[1,2]]
@@ -65,7 +65,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example3.png" style="width: 149px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example3.png" style="width: 149px; height: 150px;"></p>
 
 <pre><b>输入：</b>grid = [[1,1,1],[0,0,1],[2,3,4]], pricing = [2,3], start = [0,0], k = 3
 <b>输出：</b>[[2,1],[2,0]]
diff --git a/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README_EN.md b/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README_EN.md
index 2f7decdbfb343..5a66d9ad835ef 100644
--- a/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README_EN.md	
+++ b/solution/2100-2199/2146.K Highest Ranked Items Within a Price Range/README_EN.md	
@@ -29,7 +29,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example1drawio.png" style="width: 200px; height: 151px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example1drawio.png" style="width: 200px; height: 151px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2,0,1],[1,3,0,1],[0,2,5,1]], pricing = [2,5], start = [0,0], k = 3
 <strong>Output:</strong> [[0,1],[1,1],[2,1]]
@@ -44,7 +44,7 @@ Thus, the 3 highest ranked items in the price range are (0,1), (1,1), and (2,1).
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example2drawio1.png" style="width: 200px; height: 151px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example2drawio1.png" style="width: 200px; height: 151px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,2,0,1],[1,3,3,1],[0,2,5,1]], pricing = [2,3], start = [2,3], k = 2
 <strong>Output:</strong> [[2,1],[1,2]]
@@ -59,7 +59,7 @@ Thus, the 2 highest ranked items in the price range are (2,1) and (1,2).
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example3.png" style="width: 149px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2146.K%20Highest%20Ranked%20Items%20Within%20a%20Price%20Range/images/example3.png" style="width: 149px; height: 150px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[0,0,1],[2,3,4]], pricing = [2,3], start = [0,0], k = 3
 <strong>Output:</strong> [[2,1],[2,0]]
diff --git a/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README.md b/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README.md
index 7192e0742f700..00e1dcfe75f68 100644
--- a/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README.md	
+++ b/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/1.png" style="width: 410px; height: 199px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/1.png" style="width: 410px; height: 199px;"></p>
 
 <pre><b>输入：</b>corridor = "SSPPSPS"
 <b>输出：</b>3
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/2.png" style="width: 357px; height: 68px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/2.png" style="width: 357px; height: 68px;"></p>
 
 <pre><b>输入：</b>corridor = "PPSPSP"
 <b>输出：</b>1
@@ -39,7 +39,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/3.png" style="width: 115px; height: 68px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/3.png" style="width: 115px; height: 68px;"></p>
 
 <pre><b>输入：</b>corridor = "S"
 <b>输出：</b>0
diff --git a/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README_EN.md b/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README_EN.md
index e8830e7bf69f3..6f2e76f5eba54 100644
--- a/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README_EN.md	
+++ b/solution/2100-2199/2147.Number of Ways to Divide a Long Corridor/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/1.png" style="width: 410px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/1.png" style="width: 410px; height: 199px;" />
 <pre>
 <strong>Input:</strong> corridor = &quot;SSPPSPS&quot;
 <strong>Output:</strong> 3
@@ -24,7 +24,7 @@ Note that in each of the ways, <strong>each</strong> section has exactly <strong
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/2.png" style="width: 357px; height: 68px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/2.png" style="width: 357px; height: 68px;" />
 <pre>
 <strong>Input:</strong> corridor = &quot;PPSPSP&quot;
 <strong>Output:</strong> 1
@@ -33,7 +33,7 @@ Installing any would create some section that does not have exactly two seats.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/3.png" style="width: 115px; height: 68px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2147.Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor/images/3.png" style="width: 115px; height: 68px;" />
 <pre>
 <strong>Input:</strong> corridor = &quot;S&quot;
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2151.Maximum Good People Based on Statements/README.md b/solution/2100-2199/2151.Maximum Good People Based on Statements/README.md
index 947815ffceb0a..1c0ce8e2f54e7 100644
--- a/solution/2100-2199/2151.Maximum Good People Based on Statements/README.md	
+++ b/solution/2100-2199/2151.Maximum Good People Based on Statements/README.md	
@@ -28,7 +28,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic1.jpg" style="width: 600px; height: 262px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic1.jpg" style="width: 600px; height: 262px;">
 <pre><strong>输入：</strong>statements = [[2,1,2],[1,2,2],[2,0,2]]
 <strong>输出：</strong>2
 <strong>解释：</strong>每个人都做一条陈述。
@@ -55,7 +55,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic2.jpg" style="width: 600px; height: 262px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic2.jpg" style="width: 600px; height: 262px;">
 <pre><strong>输入：</strong>statements = [[2,0],[0,2]]
 <strong>输出：</strong>1
 <strong>解释：</strong>每个人都做一条陈述。
diff --git a/solution/2100-2199/2151.Maximum Good People Based on Statements/README_EN.md b/solution/2100-2199/2151.Maximum Good People Based on Statements/README_EN.md
index 679c3c7532196..1c5f32ecd5d4e 100644
--- a/solution/2100-2199/2151.Maximum Good People Based on Statements/README_EN.md	
+++ b/solution/2100-2199/2151.Maximum Good People Based on Statements/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic1.jpg" style="width: 600px; height: 262px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic1.jpg" style="width: 600px; height: 262px;" />
 <pre>
 <strong>Input:</strong> statements = [[2,1,2],[1,2,2],[2,0,2]]
 <strong>Output:</strong> 2
@@ -53,7 +53,7 @@ Note that there is more than one way to arrive at this conclusion.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic2.jpg" style="width: 600px; height: 262px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2151.Maximum%20Good%20People%20Based%20on%20Statements/images/logic2.jpg" style="width: 600px; height: 262px;" />
 <pre>
 <strong>Input:</strong> statements = [[2,0],[0,2]]
 <strong>Output:</strong> 1
diff --git a/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README.md b/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README.md
index 64f3d15e791e0..1efbf455b7f60 100644
--- a/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README.md	
+++ b/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200023-1.png" style="width: 350px; height: 402px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200023-1.png" style="width: 350px; height: 402px;" />
 <pre>
 <strong>输入:</strong> points = [[0,1],[2,3],[4,5],[4,3]]
 <strong>输出:</strong> 2
@@ -25,7 +25,7 @@
 </pre>
 
 <p><strong>示例 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200057-3.png" style="width: 350px; height: 480px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200057-3.png" style="width: 350px; height: 480px;" />
 <pre>
 <strong>输入:</strong> points = [[0,2],[-2,-2],[1,4]]
 <strong>输出:</strong> 1
diff --git a/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README_EN.md b/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README_EN.md
index a581389627052..6263f9851f34c 100644
--- a/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README_EN.md	
+++ b/solution/2100-2199/2152.Minimum Number of Lines to Cover Points/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200023-1.png" style="width: 350px; height: 402px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200023-1.png" style="width: 350px; height: 402px;" />
 <pre>
 <strong>Input:</strong> points = [[0,1],[2,3],[4,5],[4,3]]
 <strong>Output:</strong> 2
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200057-3.png" style="width: 350px; height: 480px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2152.Minimum%20Number%20of%20Lines%20to%20Cover%20Points/images/image-20220123200057-3.png" style="width: 350px; height: 480px;" />
 <pre>
 <strong>Input:</strong> points = [[0,2],[-2,-2],[1,4]]
 <strong>Output:</strong> 1
diff --git a/solution/2100-2199/2158.Amount of New Area Painted Each Day/README.md b/solution/2100-2199/2158.Amount of New Area Painted Each Day/README.md
index 04766d4d7527c..2feed0f8c5efa 100644
--- a/solution/2100-2199/2158.Amount of New Area Painted Each Day/README.md	
+++ b/solution/2100-2199/2158.Amount of New Area Painted Each Day/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-16-16-diagram-drawio-diagrams-net.png" style="height: 300px; width: 620px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-16-16-diagram-drawio-diagrams-net.png" style="height: 300px; width: 620px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,4],[4,7],[5,8]]
 <strong>Output:</strong> [3,3,1]
@@ -29,7 +29,7 @@ The amount of new area painted on day 2 is 8 - 7 = 1.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-17-45-diagram-drawio-diagrams-net.png" style="width: 604px; height: 300px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-17-45-diagram-drawio-diagrams-net.png" style="width: 604px; height: 300px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,4],[5,8],[4,7]]
 <strong>Output:</strong> [3,3,1]
@@ -44,7 +44,7 @@ The amount of new area painted on day 2 is 5 - 4 = 1.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-19-49-diagram-drawio-diagrams-net.png" style="width: 423px; height: 275px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-19-49-diagram-drawio-diagrams-net.png" style="width: 423px; height: 275px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,5],[2,4]]
 <strong>Output:</strong> [4,0]
diff --git a/solution/2100-2199/2158.Amount of New Area Painted Each Day/README_EN.md b/solution/2100-2199/2158.Amount of New Area Painted Each Day/README_EN.md
index c16630bab8c3e..f25ff6631bfd5 100644
--- a/solution/2100-2199/2158.Amount of New Area Painted Each Day/README_EN.md	
+++ b/solution/2100-2199/2158.Amount of New Area Painted Each Day/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-16-16-diagram-drawio-diagrams-net.png" style="height: 300px; width: 620px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-16-16-diagram-drawio-diagrams-net.png" style="height: 300px; width: 620px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,4],[4,7],[5,8]]
 <strong>Output:</strong> [3,3,1]
@@ -27,7 +27,7 @@ The amount of new area painted on day 2 is 8 - 7 = 1.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-17-45-diagram-drawio-diagrams-net.png" style="width: 604px; height: 300px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-17-45-diagram-drawio-diagrams-net.png" style="width: 604px; height: 300px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,4],[5,8],[4,7]]
 <strong>Output:</strong> [3,3,1]
@@ -42,7 +42,7 @@ The amount of new area painted on day 2 is 5 - 4 = 1.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-19-49-diagram-drawio-diagrams-net.png" style="width: 423px; height: 275px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2158.Amount%20of%20New%20Area%20Painted%20Each%20Day/images/screenshot-2022-02-01-at-17-19-49-diagram-drawio-diagrams-net.png" style="width: 423px; height: 275px;" />
 <pre>
 <strong>Input:</strong> paint = [[1,5],[2,4]]
 <strong>Output:</strong> [4,0]
diff --git a/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README.md b/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README.md
index 304b0361b872d..ec043cf280568 100644
--- a/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README.md	
+++ b/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README.md	
@@ -34,7 +34,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/1.png" style="width: 506px; height: 210px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/1.png" style="width: 506px; height: 210px;"></p>
 
 <pre><b>输入：</b>startAt = 1, moveCost = 2, pushCost = 1, targetSeconds = 600
 <b>输出：</b>6
@@ -52,7 +52,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/2.png" style="width: 505px; height: 73px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/2.png" style="width: 505px; height: 73px;"></p>
 
 <pre><b>输入：</b>startAt = 0, moveCost = 1, pushCost = 2, targetSeconds = 76
 <b>输出：</b>6
diff --git a/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README_EN.md b/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README_EN.md
index d2e2db005596f..0320b849702f7 100644
--- a/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README_EN.md	
+++ b/solution/2100-2199/2162.Minimum Cost to Set Cooking Time/README_EN.md	
@@ -30,7 +30,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/1.png" style="width: 506px; height: 210px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/1.png" style="width: 506px; height: 210px;" />
 <pre>
 <strong>Input:</strong> startAt = 1, moveCost = 2, pushCost = 1, targetSeconds = 600
 <strong>Output:</strong> 6
@@ -47,7 +47,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/2.png" style="width: 505px; height: 73px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2162.Minimum%20Cost%20to%20Set%20Cooking%20Time/images/2.png" style="width: 505px; height: 73px;" />
 <pre>
 <strong>Input:</strong> startAt = 0, moveCost = 1, pushCost = 2, targetSeconds = 76
 <strong>Output:</strong> 6
diff --git a/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README.md b/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README.md
index c56a792646d73..d10af5e8684c8 100644
--- a/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README.md	
+++ b/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162716-1.png" style="width: 709px; height: 200px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162716-1.png" style="width: 709px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[1,1,1],[0,1,0]]
 <strong>Output:</strong> 2
@@ -32,7 +32,7 @@ In the second operation, change all cell values of row 0 and column 0 to zero.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162737-2.png" style="width: 734px; height: 200px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162737-2.png" style="width: 734px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,0],[1,0,1],[0,1,0]]
 <strong>Output:</strong> 2
@@ -43,7 +43,7 @@ Note that we cannot perform an operation using row 1 and column 1 because grid[1
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162752-3.png" style="width: 156px; height: 150px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162752-3.png" style="width: 156px; height: 150px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0],[0,0]]
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README_EN.md b/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README_EN.md
index 5ed9b8c31eeb9..0749ee7f1e3ac 100644
--- a/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README_EN.md	
+++ b/solution/2100-2199/2174.Remove All Ones With Row and Column Flips II/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162716-1.png" style="width: 709px; height: 200px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162716-1.png" style="width: 709px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [[1,1,1],[1,1,1],[0,1,0]]
 <strong>Output:</strong> 2
@@ -30,7 +30,7 @@ In the second operation, change all cell values of row 0 and column 0 to zero.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162737-2.png" style="width: 734px; height: 200px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162737-2.png" style="width: 734px; height: 200px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,1,0],[1,0,1],[0,1,0]]
 <strong>Output:</strong> 2
@@ -41,7 +41,7 @@ Note that we cannot perform an operation using row 1 and column 1 because grid[1
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162752-3.png" style="width: 156px; height: 150px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2174.Remove%20All%20Ones%20With%20Row%20and%20Column%20Flips%20II/images/image-20220213162752-3.png" style="width: 156px; height: 150px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0],[0,0]]
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2181.Merge Nodes in Between Zeros/README.md b/solution/2100-2199/2181.Merge Nodes in Between Zeros/README.md
index 117e73f798aa4..f43e228e9d3a0 100644
--- a/solution/2100-2199/2181.Merge Nodes in Between Zeros/README.md	
+++ b/solution/2100-2199/2181.Merge Nodes in Between Zeros/README.md	
@@ -15,7 +15,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex1-1.png" style="width: 600px; height: 41px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex1-1.png" style="width: 600px; height: 41px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>head = [0,3,1,0,4,5,2,0]
@@ -27,7 +27,7 @@
 </pre>
 
 <p><strong>示例 2：<br />
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex2-1.png" style="width: 600px; height: 41px;" /></strong></p>
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex2-1.png" style="width: 600px; height: 41px;" /></strong></p>
 
 <pre>
 <strong>输入：</strong>head = [0,1,0,3,0,2,2,0]
diff --git a/solution/2100-2199/2181.Merge Nodes in Between Zeros/README_EN.md b/solution/2100-2199/2181.Merge Nodes in Between Zeros/README_EN.md
index c11a14eea5492..fe8ecd5fd5c39 100644
--- a/solution/2100-2199/2181.Merge Nodes in Between Zeros/README_EN.md	
+++ b/solution/2100-2199/2181.Merge Nodes in Between Zeros/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex1-1.png" style="width: 600px; height: 41px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex1-1.png" style="width: 600px; height: 41px;" />
 <pre>
 <strong>Input:</strong> head = [0,3,1,0,4,5,2,0]
 <strong>Output:</strong> [4,11]
@@ -23,7 +23,7 @@ The above figure represents the given linked list. The modified list contains
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex2-1.png" style="width: 600px; height: 41px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2181.Merge%20Nodes%20in%20Between%20Zeros/images/ex2-1.png" style="width: 600px; height: 41px;" />
 <pre>
 <strong>Input:</strong> head = [0,1,0,3,0,2,2,0]
 <strong>Output:</strong> [1,3,4]
diff --git a/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README.md b/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README.md
index 93bae19e2803a..c335f597e25d3 100644
--- a/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README.md	
+++ b/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2184.Number%20of%20Ways%20to%20Build%20Sturdy%20Brick%20Wall/images/image-20220220190749-1.png" style="width: 919px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2184.Number%20of%20Ways%20to%20Build%20Sturdy%20Brick%20Wall/images/image-20220220190749-1.png" style="width: 919px; height: 250px;" />
 <pre>
 <strong>Input:</strong> height = 2, width = 3, bricks = [1,2]
 <strong>Output:</strong> 2
diff --git a/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README_EN.md b/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README_EN.md
index eafd9a5edff89..33804cc6e10e1 100644
--- a/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README_EN.md	
+++ b/solution/2100-2199/2184.Number of Ways to Build Sturdy Brick Wall/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2184.Number%20of%20Ways%20to%20Build%20Sturdy%20Brick%20Wall/images/image-20220220190749-1.png" style="width: 919px; height: 250px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2184.Number%20of%20Ways%20to%20Build%20Sturdy%20Brick%20Wall/images/image-20220220190749-1.png" style="width: 919px; height: 250px;" />
 <pre>
 <strong>Input:</strong> height = 2, width = 3, bricks = [1,2]
 <strong>Output:</strong> 2
diff --git a/solution/2100-2199/2189.Number of Ways to Build House of Cards/README.md b/solution/2100-2199/2189.Number of Ways to Build House of Cards/README.md
index 5d3d30311a8ef..1f452241c7d1a 100644
--- a/solution/2100-2199/2189.Number of Ways to Build House of Cards/README.md	
+++ b/solution/2100-2199/2189.Number of Ways to Build House of Cards/README.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213243-1.png" style="width: 726px; height: 150px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213243-1.png" style="width: 726px; height: 150px;" />
 <pre>
 <strong>Input:</strong> n = 16
 <strong>Output:</strong> 2
@@ -29,7 +29,7 @@ The third house of cards in the diagram is not valid because the rightmost trian
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213306-2.png" style="width: 96px; height: 80px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213306-2.png" style="width: 96px; height: 80px;" />
 <pre>
 <strong>Input:</strong> n = 2
 <strong>Output:</strong> 1
@@ -37,7 +37,7 @@ The third house of cards in the diagram is not valid because the rightmost trian
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213331-3.png" style="width: 330px; height: 85px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213331-3.png" style="width: 330px; height: 85px;" />
 <pre>
 <strong>Input:</strong> n = 4
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2189.Number of Ways to Build House of Cards/README_EN.md b/solution/2100-2199/2189.Number of Ways to Build House of Cards/README_EN.md
index 629e3623bbf7c..441b87aa97d3c 100644
--- a/solution/2100-2199/2189.Number of Ways to Build House of Cards/README_EN.md	
+++ b/solution/2100-2199/2189.Number of Ways to Build House of Cards/README_EN.md	
@@ -18,7 +18,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213243-1.png" style="width: 726px; height: 150px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213243-1.png" style="width: 726px; height: 150px;" />
 <pre>
 <strong>Input:</strong> n = 16
 <strong>Output:</strong> 2
@@ -27,7 +27,7 @@ The third house of cards in the diagram is not valid because the rightmost trian
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213306-2.png" style="width: 96px; height: 80px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213306-2.png" style="width: 96px; height: 80px;" />
 <pre>
 <strong>Input:</strong> n = 2
 <strong>Output:</strong> 1
@@ -35,7 +35,7 @@ The third house of cards in the diagram is not valid because the rightmost trian
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213331-3.png" style="width: 330px; height: 85px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2189.Number%20of%20Ways%20to%20Build%20House%20of%20Cards/images/image-20220227213331-3.png" style="width: 330px; height: 85px;" />
 <pre>
 <strong>Input:</strong> n = 4
 <strong>Output:</strong> 0
diff --git a/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README.md b/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README.md
index d39713491c999..248f3a1ddfc35 100644
--- a/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README.md	
+++ b/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e1.png" style="width: 322px; height: 265px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e1.png" style="width: 322px; height: 265px;"></p>
 
 <pre><b>输入：</b>n = 8, edgeList = [[0,3],[0,4],[1,3],[2,4],[2,7],[3,5],[3,6],[3,7],[4,6]]
 <b>输出：</b>[[],[],[],[0,1],[0,2],[0,1,3],[0,1,2,3,4],[0,1,2,3]]
@@ -34,7 +34,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e2.png" style="width: 343px; height: 299px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e2.png" style="width: 343px; height: 299px;"></p>
 
 <pre><b>输入：</b>n = 5, edgeList = [[0,1],[0,2],[0,3],[0,4],[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]]
 <b>输出：</b>[[],[0],[0,1],[0,1,2],[0,1,2,3]]
diff --git a/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README_EN.md b/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README_EN.md
index 4cc49ef7d71d5..085133063114b 100644
--- a/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README_EN.md	
+++ b/solution/2100-2199/2192.All Ancestors of a Node in a Directed Acyclic Graph/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e1.png" style="width: 322px; height: 265px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e1.png" style="width: 322px; height: 265px;" />
 <pre>
 <strong>Input:</strong> n = 8, edgeList = [[0,3],[0,4],[1,3],[2,4],[2,7],[3,5],[3,6],[3,7],[4,6]]
 <strong>Output:</strong> [[],[],[],[0,1],[0,2],[0,1,3],[0,1,2,3,4],[0,1,2,3]]
@@ -29,7 +29,7 @@ The above diagram represents the input graph.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e2.png" style="width: 343px; height: 299px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2192.All%20Ancestors%20of%20a%20Node%20in%20a%20Directed%20Acyclic%20Graph/images/e2.png" style="width: 343px; height: 299px;" />
 <pre>
 <strong>Input:</strong> n = 5, edgeList = [[0,1],[0,2],[0,3],[0,4],[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]]
 <strong>Output:</strong> [[],[0],[0,1],[0,1,2],[0,1,2,3]]
diff --git a/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README.md b/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README.md
index 28ff5f94d0d63..e197007445204 100644
--- a/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README.md	
+++ b/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/ex1drawio.png" style="width: 250px; height: 160px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/ex1drawio.png" style="width: 250px; height: 160px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "K1:L2"
@@ -38,7 +38,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/exam2drawio.png" style="width: 500px; height: 50px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/exam2drawio.png" style="width: 500px; height: 50px;" /></p>
 
 <pre>
 <strong>输入：</strong>s = "A1:F1"
diff --git a/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README_EN.md b/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README_EN.md
index 7517713701d25..1d6892ec8554e 100644
--- a/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README_EN.md	
+++ b/solution/2100-2199/2194.Cells in a Range on an Excel Sheet/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/ex1drawio.png" style="width: 250px; height: 160px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/ex1drawio.png" style="width: 250px; height: 160px;" />
 <pre>
 <strong>Input:</strong> s = &quot;K1:L2&quot;
 <strong>Output:</strong> [&quot;K1&quot;,&quot;K2&quot;,&quot;L1&quot;,&quot;L2&quot;]
@@ -32,7 +32,7 @@ The red arrows denote the order in which the cells should be presented.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/exam2drawio.png" style="width: 500px; height: 50px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2194.Cells%20in%20a%20Range%20on%20an%20Excel%20Sheet/images/exam2drawio.png" style="width: 500px; height: 50px;" />
 <pre>
 <strong>Input:</strong> s = &quot;A1:F1&quot;
 <strong>Output:</strong> [&quot;A1&quot;,&quot;B1&quot;,&quot;C1&quot;,&quot;D1&quot;,&quot;E1&quot;,&quot;F1&quot;]
diff --git a/solution/2100-2199/2196.Create Binary Tree From Descriptions/README.md b/solution/2100-2199/2196.Create Binary Tree From Descriptions/README.md
index 86775d13625fa..6299f9418ee83 100644
--- a/solution/2100-2199/2196.Create Binary Tree From Descriptions/README.md	
+++ b/solution/2100-2199/2196.Create Binary Tree From Descriptions/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example1drawio.png" style="width: 300px; height: 236px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example1drawio.png" style="width: 300px; height: 236px;" /></p>
 
 <pre>
 <strong>输入：</strong>descriptions = [[20,15,1],[20,17,0],[50,20,1],[50,80,0],[80,19,1]]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example2drawio.png" style="width: 131px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example2drawio.png" style="width: 131px; height: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>descriptions = [[1,2,1],[2,3,0],[3,4,1]]
diff --git a/solution/2100-2199/2196.Create Binary Tree From Descriptions/README_EN.md b/solution/2100-2199/2196.Create Binary Tree From Descriptions/README_EN.md
index 07dd03a8353f8..4fa5a74c1bdeb 100644
--- a/solution/2100-2199/2196.Create Binary Tree From Descriptions/README_EN.md	
+++ b/solution/2100-2199/2196.Create Binary Tree From Descriptions/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example1drawio.png" style="width: 300px; height: 236px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example1drawio.png" style="width: 300px; height: 236px;" />
 <pre>
 <strong>Input:</strong> descriptions = [[20,15,1],[20,17,0],[50,20,1],[50,80,0],[80,19,1]]
 <strong>Output:</strong> [50,20,80,15,17,19]
@@ -26,7 +26,7 @@ The resulting binary tree is shown in the diagram.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example2drawio.png" style="width: 131px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2100-2199/2196.Create%20Binary%20Tree%20From%20Descriptions/images/example2drawio.png" style="width: 131px; height: 300px;" />
 <pre>
 <strong>Input:</strong> descriptions = [[1,2,1],[2,3,0],[3,4,1]]
 <strong>Output:</strong> [1,2,null,null,3,4]
diff --git a/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README.md b/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README.md
index 4afdcaf05383c..b26337625b665 100644
--- a/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README.md	
+++ b/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README.md	
@@ -28,7 +28,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram.jpg" style="width: 216px; height: 216px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram.jpg" style="width: 216px; height: 216px;">
 <pre><strong>输入：</strong>n = 2, artifacts = [[0,0,0,0],[0,1,1,1]], dig = [[0,0],[0,1]]
 <strong>输出：</strong>1
 <strong>解释：</strong> 
@@ -39,7 +39,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram-1.jpg" style="width: 216px; height: 216px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram-1.jpg" style="width: 216px; height: 216px;">
 <pre><strong>输入：</strong>n = 2, artifacts = [[0,0,0,0],[0,1,1,1]], dig = [[0,0],[0,1],[1,1]]
 <strong>输出：</strong>2
 <strong>解释：</strong>红色工件和蓝色工件的所有部分都裸露出来（用 'D' 标记），都可以提取。因此，返回 2 。 
diff --git a/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README_EN.md b/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README_EN.md
index 9e9bad4c663bf..97c17b6259c43 100644
--- a/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README_EN.md	
+++ b/solution/2200-2299/2201.Count Artifacts That Can Be Extracted/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram.jpg" style="width: 216px; height: 216px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram.jpg" style="width: 216px; height: 216px;" />
 <pre>
 <strong>Input:</strong> n = 2, artifacts = [[0,0,0,0],[0,1,1,1]], dig = [[0,0],[0,1]]
 <strong>Output:</strong> 1
@@ -37,7 +37,7 @@ Thus, we return 1.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram-1.jpg" style="width: 216px; height: 216px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2201.Count%20Artifacts%20That%20Can%20Be%20Extracted/images/untitled-diagram-1.jpg" style="width: 216px; height: 216px;" />
 <pre>
 <strong>Input:</strong> n = 2, artifacts = [[0,0,0,0],[0,1,1,1]], dig = [[0,0],[0,1],[1,1]]
 <strong>Output:</strong> 2
diff --git a/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README.md b/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README.md
index 81d9c95efa0ed..c7a06274516e7 100644
--- a/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README.md	
+++ b/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README.md	
@@ -20,7 +20,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example1drawio.png" style="width: 263px; height: 250px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example1drawio.png" style="width: 263px; height: 250px;" /></p>
 
 <pre>
 <b>输入：</b>n = 6, edges = [[0,2,2],[0,5,6],[1,0,3],[1,4,5],[2,1,1],[2,3,3],[2,3,4],[3,4,2],[4,5,1]], src1 = 0, src2 = 1, dest = 5
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example2-1drawio.png" style="width: 350px; height: 51px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example2-1drawio.png" style="width: 350px; height: 51px;" /></p>
 
 <pre>
 <b>输入：</b>n = 3, edges = [[0,1,1],[2,1,1]], src1 = 0, src2 = 1, dest = 2
diff --git a/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README_EN.md b/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README_EN.md
index 305a782c4eb78..d6dfec5ae9180 100644
--- a/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README_EN.md	
+++ b/solution/2200-2299/2203.Minimum Weighted Subgraph With the Required Paths/README_EN.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example1drawio.png" style="width: 263px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example1drawio.png" style="width: 263px; height: 250px;" />
 <pre>
 <strong>Input:</strong> n = 6, edges = [[0,2,2],[0,5,6],[1,0,3],[1,4,5],[2,1,1],[2,3,3],[2,3,4],[3,4,2],[4,5,1]], src1 = 0, src2 = 1, dest = 5
 <strong>Output:</strong> 9
@@ -27,7 +27,7 @@ Note that the subgraph [[1,0,3],[0,5,6]] also yields the optimal answer. It is n
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example2-1drawio.png" style="width: 350px; height: 51px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2203.Minimum%20Weighted%20Subgraph%20With%20the%20Required%20Paths/images/example2-1drawio.png" style="width: 350px; height: 51px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1,1],[2,1,1]], src1 = 0, src2 = 1, dest = 2
 <strong>Output:</strong> -1
diff --git a/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README.md b/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README.md
index a6814c699338b..fb4321852e2ef 100644
--- a/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README.md	
+++ b/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README.md	
@@ -16,7 +16,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154238-1.png" style="width: 350px; height: 237px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154238-1.png" style="width: 350px; height: 237px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,2],[2,3],[3,4],[4,1],[0,1],[5,2],[6,5]]
 <strong>Output:</strong> [1,0,0,0,0,1,2]
@@ -32,7 +32,7 @@ The distance from 6 to 2 is 2.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154634-1.png" style="width: 400px; height: 297px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154634-1.png" style="width: 400px; height: 297px;" />
 <pre>
 <strong>Input:</strong> n = 9, edges = [[0,1],[1,2],[0,2],[2,6],[6,7],[6,8],[1,3],[3,4],[3,5]]
 <strong>Output:</strong> [0,0,0,1,2,2,1,2,2]
diff --git a/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README_EN.md b/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README_EN.md
index 4ae85a04c9d84..4b17ddae67175 100644
--- a/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README_EN.md	
+++ b/solution/2200-2299/2204.Distance to a Cycle in Undirected Graph/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154238-1.png" style="width: 350px; height: 237px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154238-1.png" style="width: 350px; height: 237px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[1,2],[2,3],[3,4],[4,1],[0,1],[5,2],[6,5]]
 <strong>Output:</strong> [1,0,0,0,0,1,2]
@@ -30,7 +30,7 @@ The distance from 6 to 2 is 2.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154634-1.png" style="width: 400px; height: 297px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2204.Distance%20to%20a%20Cycle%20in%20Undirected%20Graph/images/image-20220315154634-1.png" style="width: 400px; height: 297px;" />
 <pre>
 <strong>Input:</strong> n = 9, edges = [[0,1],[1,2],[0,2],[2,6],[6,7],[6,8],[1,3],[3,4],[3,5]]
 <strong>Output:</strong> [0,0,0,1,2,2,1,2,2]
diff --git a/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README.md b/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README.md
index e1d7c45dc0192..064a9441a0823 100644
--- a/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README.md	
+++ b/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README.md	
@@ -21,7 +21,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex1-1.png" style="width: 400px; height: 73px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex1-1.png" style="width: 400px; height: 73px;"></p>
 
 <pre><b>输入：</b>floor = "10110101", numCarpets = 2, carpetLen = 2
 <b>输出：</b>2
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex2.png" style="width: 353px; height: 123px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex2.png" style="width: 353px; height: 123px;"></p>
 
 <pre><b>输入：</b>floor = "11111", numCarpets = 2, carpetLen = 3
 <b>输出：</b>0
diff --git a/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README_EN.md b/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README_EN.md
index 2d18f1a0cc266..b3fd65fd3dc6f 100644
--- a/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README_EN.md	
+++ b/solution/2200-2299/2209.Minimum White Tiles After Covering With Carpets/README_EN.md	
@@ -17,7 +17,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex1-1.png" style="width: 400px; height: 73px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex1-1.png" style="width: 400px; height: 73px;" />
 <pre>
 <strong>Input:</strong> floor = &quot;10110101&quot;, numCarpets = 2, carpetLen = 2
 <strong>Output:</strong> 2
@@ -27,7 +27,7 @@ No other way of covering the tiles with the carpets can leave less than 2 white
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex2.png" style="width: 353px; height: 123px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2209.Minimum%20White%20Tiles%20After%20Covering%20With%20Carpets/images/ex2.png" style="width: 353px; height: 123px;" />
 <pre>
 <strong>Input:</strong> floor = &quot;11111&quot;, numCarpets = 2, carpetLen = 3
 <strong>Output:</strong> 0
diff --git a/solution/2200-2299/2212.Maximum Points in an Archery Competition/README.md b/solution/2200-2299/2212.Maximum Points in an Archery Competition/README.md
index d23b82aa22771..2572d219d9e64 100644
--- a/solution/2200-2299/2212.Maximum Points in an Archery Competition/README.md	
+++ b/solution/2200-2299/2212.Maximum Points in an Archery Competition/README.md	
@@ -35,7 +35,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/1647744752-kQKrXw-image.png" style="width: 600px; height: 120px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/1647744752-kQKrXw-image.png" style="width: 600px; height: 120px;" /></p>
 
 <pre>
 <strong>输入：</strong>numArrows = 9, aliceArrows = [1,1,0,1,0,0,2,1,0,1,2,0]
@@ -47,7 +47,7 @@ Bob 获得总分 4 + 5 + 8 + 9 + 10 + 11 = 47 。
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/1647744785-cMHzaC-image.png" style="width: 600px; height: 117px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/1647744785-cMHzaC-image.png" style="width: 600px; height: 117px;" /></p>
 
 <pre>
 <strong>输入：</strong>numArrows = 3, aliceArrows = [0,0,1,0,0,0,0,0,0,0,0,2]
diff --git a/solution/2200-2299/2212.Maximum Points in an Archery Competition/README_EN.md b/solution/2200-2299/2212.Maximum Points in an Archery Competition/README_EN.md
index 53986435161a4..6571e680fa08f 100644
--- a/solution/2200-2299/2212.Maximum Points in an Archery Competition/README_EN.md	
+++ b/solution/2200-2299/2212.Maximum Points in an Archery Competition/README_EN.md	
@@ -31,7 +31,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/ex1.jpg" style="width: 600px; height: 120px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/ex1.jpg" style="width: 600px; height: 120px;" />
 <pre>
 <strong>Input:</strong> numArrows = 9, aliceArrows = [1,1,0,1,0,0,2,1,0,1,2,0]
 <strong>Output:</strong> [0,0,0,0,1,1,0,0,1,2,3,1]
@@ -41,7 +41,7 @@ It can be shown that Bob cannot obtain a score higher than 47 points.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/ex2new.jpg" style="width: 600px; height: 117px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2212.Maximum%20Points%20in%20an%20Archery%20Competition/images/ex2new.jpg" style="width: 600px; height: 117px;" />
 <pre>
 <strong>Input:</strong> numArrows = 3, aliceArrows = [0,0,1,0,0,0,0,0,0,0,0,2]
 <strong>Output:</strong> [0,0,0,0,0,0,0,0,1,1,1,0]
diff --git a/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README.md b/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README.md
index 869a76200aca7..35aa318b696aa 100644
--- a/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README.md	
+++ b/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2218.Maximum%20Value%20of%20K%20Coins%20From%20Piles/images/e1.png" style="width: 600px; height: 243px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2218.Maximum%20Value%20of%20K%20Coins%20From%20Piles/images/e1.png" style="width: 600px; height: 243px;" /></p>
 
 <pre>
 <b>输入：</b>piles = [[1,100,3],[7,8,9]], k = 2
diff --git a/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README_EN.md b/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README_EN.md
index 5e5f409d2375f..a3ad1d35f5abe 100644
--- a/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README_EN.md	
+++ b/solution/2200-2299/2218.Maximum Value of K Coins From Piles/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2218.Maximum%20Value%20of%20K%20Coins%20From%20Piles/images/e1.png" style="width: 600px; height: 243px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2218.Maximum%20Value%20of%20K%20Coins%20From%20Piles/images/e1.png" style="width: 600px; height: 243px;" />
 <pre>
 <strong>Input:</strong> piles = [[1,100,3],[7,8,9]], k = 2
 <strong>Output:</strong> 101
diff --git a/solution/2200-2299/2221.Find Triangular Sum of an Array/README.md b/solution/2200-2299/2221.Find Triangular Sum of an Array/README.md
index f6ec47a56971d..52c015f766674 100644
--- a/solution/2200-2299/2221.Find Triangular Sum of an Array/README.md	
+++ b/solution/2200-2299/2221.Find Triangular Sum of an Array/README.md	
@@ -23,7 +23,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2221.Find%20Triangular%20Sum%20of%20an%20Array/images/ex1drawio.png" style="width: 250px; height: 250px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2221.Find%20Triangular%20Sum%20of%20an%20Array/images/ex1drawio.png" style="width: 250px; height: 250px;" /></p>
 
 <pre>
 <b>输入：</b>nums = [1,2,3,4,5]
diff --git a/solution/2200-2299/2221.Find Triangular Sum of an Array/README_EN.md b/solution/2200-2299/2221.Find Triangular Sum of an Array/README_EN.md
index f09441acc8572..f3264c9b25fdc 100644
--- a/solution/2200-2299/2221.Find Triangular Sum of an Array/README_EN.md	
+++ b/solution/2200-2299/2221.Find Triangular Sum of an Array/README_EN.md	
@@ -19,7 +19,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2221.Find%20Triangular%20Sum%20of%20an%20Array/images/ex1drawio.png" style="width: 250px; height: 250px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2221.Find%20Triangular%20Sum%20of%20an%20Array/images/ex1drawio.png" style="width: 250px; height: 250px;" />
 <pre>
 <strong>Input:</strong> nums = [1,2,3,4,5]
 <strong>Output:</strong> 8
diff --git a/solution/2200-2299/2236.Root Equals Sum of Children/README.md b/solution/2200-2299/2236.Root Equals Sum of Children/README.md
index 7928f53e69a7d..aef0e7e171ab6 100644
--- a/solution/2200-2299/2236.Root Equals Sum of Children/README.md	
+++ b/solution/2200-2299/2236.Root Equals Sum of Children/README.md	
@@ -13,7 +13,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio.png" style="width: 281px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio.png" style="width: 281px; height: 199px;" />
 <pre>
 <strong>输入：</strong>root = [10,4,6]
 <strong>输出：</strong>true
@@ -22,7 +22,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio-1.png" style="width: 281px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio-1.png" style="width: 281px; height: 199px;" />
 <pre>
 <strong>输入：</strong>root = [5,3,1]
 <strong>输出：</strong>false
diff --git a/solution/2200-2299/2236.Root Equals Sum of Children/README_EN.md b/solution/2200-2299/2236.Root Equals Sum of Children/README_EN.md
index 6a74289e1483e..a42534f07d600 100644
--- a/solution/2200-2299/2236.Root Equals Sum of Children/README_EN.md	
+++ b/solution/2200-2299/2236.Root Equals Sum of Children/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio.png" style="width: 281px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio.png" style="width: 281px; height: 199px;" />
 <pre>
 <strong>Input:</strong> root = [10,4,6]
 <strong>Output:</strong> true
@@ -19,7 +19,7 @@
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio-1.png" style="width: 281px; height: 199px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2236.Root%20Equals%20Sum%20of%20Children/images/graph3drawio-1.png" style="width: 281px; height: 199px;" />
 <pre>
 <strong>Input:</strong> root = [5,3,1]
 <strong>Output:</strong> false
diff --git a/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README.md b/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README.md
index d8d584913ab76..0bf1aeb5ede8a 100644
--- a/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README.md	
+++ b/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2237.Count%20Positions%20on%20Street%20With%20Required%20Brightness/images/screenshot-2022-04-11-at-22-24-43-diagramdrawio-diagramsnet.png" style="height: 150px; width: 579px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2237.Count%20Positions%20on%20Street%20With%20Required%20Brightness/images/screenshot-2022-04-11-at-22-24-43-diagramdrawio-diagramsnet.png" style="height: 150px; width: 579px;" />
 <pre>
 <strong>Input:</strong> n = 5, lights = [[0,1],[2,1],[3,2]], requirement = [0,2,1,4,1]
 <strong>Output:</strong> 4
diff --git a/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README_EN.md b/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README_EN.md
index dd9bd823d44f4..7e43c54703969 100644
--- a/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README_EN.md	
+++ b/solution/2200-2299/2237.Count Positions on Street With Required Brightness/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2237.Count%20Positions%20on%20Street%20With%20Required%20Brightness/images/screenshot-2022-04-11-at-22-24-43-diagramdrawio-diagramsnet.png" style="height: 150px; width: 579px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2237.Count%20Positions%20on%20Street%20With%20Required%20Brightness/images/screenshot-2022-04-11-at-22-24-43-diagramdrawio-diagramsnet.png" style="height: 150px; width: 579px;" />
 <pre>
 <strong>Input:</strong> n = 5, lights = [[0,1],[2,1],[3,2]], requirement = [0,2,1,4,1]
 <strong>Output:</strong> 4
diff --git a/solution/2200-2299/2242.Maximum Score of a Node Sequence/README.md b/solution/2200-2299/2242.Maximum Score of a Node Sequence/README.md
index 3b6535f0d640b..0f693bf84a21b 100644
--- a/solution/2200-2299/2242.Maximum Score of a Node Sequence/README.md	
+++ b/solution/2200-2299/2242.Maximum Score of a Node Sequence/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex1new3.png" style="width: 290px; height: 215px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex1new3.png" style="width: 290px; height: 215px;" /></p>
 
 <pre>
 <b>输入：</b>scores = [5,2,9,8,4], edges = [[0,1],[1,2],[2,3],[0,2],[1,3],[2,4]]
@@ -39,7 +39,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex2.png" style="width: 333px; height: 151px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex2.png" style="width: 333px; height: 151px;" /></p>
 
 <pre>
 <b>输入：</b>scores = [9,20,6,4,11,12], edges = [[0,3],[5,3],[2,4],[1,3]]
diff --git a/solution/2200-2299/2242.Maximum Score of a Node Sequence/README_EN.md b/solution/2200-2299/2242.Maximum Score of a Node Sequence/README_EN.md
index b140e1a4c873d..32a3ad3af8431 100644
--- a/solution/2200-2299/2242.Maximum Score of a Node Sequence/README_EN.md	
+++ b/solution/2200-2299/2242.Maximum Score of a Node Sequence/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex1new3.png" style="width: 290px; height: 215px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex1new3.png" style="width: 290px; height: 215px;" />
 <pre>
 <strong>Input:</strong> scores = [5,2,9,8,4], edges = [[0,1],[1,2],[2,3],[0,2],[1,3],[2,4]]
 <strong>Output:</strong> 24
@@ -33,7 +33,7 @@ The sequence [0,3,2,4] is not valid since no edge connects nodes 0 and 3.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex2.png" style="width: 333px; height: 151px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex2.png" style="width: 333px; height: 151px;" />
 <pre>
 <strong>Input:</strong> scores = [9,20,6,4,11,12], edges = [[0,3],[5,3],[2,4],[1,3]]
 <strong>Output:</strong> -1
diff --git a/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README.md b/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README.md
index a54a46859262a..5856bcdd2ab61 100644
--- a/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README.md	
+++ b/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README.md	
@@ -25,7 +25,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex1new2.jpg" style="width: 577px; height: 190px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex1new2.jpg" style="width: 577px; height: 190px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[23,17,15,3,20],[8,1,20,27,11],[9,4,6,2,21],[40,9,1,10,6],[22,7,4,5,3]]
@@ -40,7 +40,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex2.jpg" style="width: 150px; height: 157px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex2.jpg" style="width: 150px; height: 157px;" /></p>
 
 <pre>
 <strong>输入：</strong>grid = [[4,3,2],[7,6,1],[8,8,8]]
diff --git a/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README_EN.md b/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README_EN.md
index daabf0667186b..c2a465e6f7ac0 100644
--- a/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README_EN.md	
+++ b/solution/2200-2299/2245.Maximum Trailing Zeros in a Cornered Path/README_EN.md	
@@ -21,7 +21,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex1new2.jpg" style="width: 577px; height: 190px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex1new2.jpg" style="width: 577px; height: 190px;" />
 <pre>
 <strong>Input:</strong> grid = [[23,17,15,3,20],[8,1,20,27,11],[9,4,6,2,21],[40,9,1,10,6],[22,7,4,5,3]]
 <strong>Output:</strong> 3
@@ -35,7 +35,7 @@ The grid on the right is not a cornered path as it requires a return to a previo
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex2.jpg" style="width: 150px; height: 157px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2245.Maximum%20Trailing%20Zeros%20in%20a%20Cornered%20Path/images/ex2.jpg" style="width: 150px; height: 157px;" />
 <pre>
 <strong>Input:</strong> grid = [[4,3,2],[7,6,1],[8,8,8]]
 <strong>Output:</strong> 0
diff --git a/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README.md b/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README.md
index 3e8dd0a6750e0..87abe4a838293 100644
--- a/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README.md	
+++ b/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/testingdrawio.png" style="width: 201px; height: 241px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/testingdrawio.png" style="width: 201px; height: 241px;" /></p>
 
 <pre>
 <strong>输入：</strong>parent = [-1,0,0,1,1,2], s = "abacbe"
@@ -27,7 +27,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/graph2drawio.png" style="width: 201px; height: 221px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/graph2drawio.png" style="width: 201px; height: 221px;" /></p>
 
 <pre>
 <strong>输入：</strong>parent = [-1,0,0,0], s = "aabc"
diff --git a/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README_EN.md b/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README_EN.md
index 733752849554c..8258cdafc8ac8 100644
--- a/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README_EN.md	
+++ b/solution/2200-2299/2246.Longest Path With Different Adjacent Characters/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/testingdrawio.png" style="width: 201px; height: 241px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/testingdrawio.png" style="width: 201px; height: 241px;" />
 <pre>
 <strong>Input:</strong> parent = [-1,0,0,1,1,2], s = &quot;abacbe&quot;
 <strong>Output:</strong> 3
@@ -21,7 +21,7 @@ It can be proven that there is no longer path that satisfies the conditions.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/graph2drawio.png" style="width: 201px; height: 221px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2246.Longest%20Path%20With%20Different%20Adjacent%20Characters/images/graph2drawio.png" style="width: 201px; height: 221px;" />
 <pre>
 <strong>Input:</strong> parent = [-1,0,0,0], s = &quot;aabc&quot;
 <strong>Output:</strong> 3
diff --git a/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README.md b/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README.md
index a63c84b3ad2ad..4ff5e2da69f52 100644
--- a/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README.md	
+++ b/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173304-1.png" style="height: 200px; width: 327px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173304-1.png" style="height: 200px; width: 327px;" />
 <pre>
 <strong>Input:</strong> n = 5, highways = [[0,1,4],[2,1,3],[1,4,11],[3,2,3],[3,4,2]], k = 3
 <strong>Output:</strong> 17
@@ -28,7 +28,7 @@ Note that the trip 4 -&gt; 1 -&gt; 0 -&gt; 1 is not allowed because you visit th
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173342-2.png" style="height: 200px; width: 217px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173342-2.png" style="height: 200px; width: 217px;" />
 <pre>
 <strong>Input:</strong> n = 4, highways = [[0,1,3],[2,3,2]], k = 2
 <strong>Output:</strong> -1
diff --git a/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README_EN.md b/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README_EN.md
index 2ed01a8521807..ac44b0d7a9e21 100644
--- a/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README_EN.md	
+++ b/solution/2200-2299/2247.Maximum Cost of Trip With K Highways/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173304-1.png" style="height: 200px; width: 327px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173304-1.png" style="height: 200px; width: 327px;" />
 <pre>
 <strong>Input:</strong> n = 5, highways = [[0,1,4],[2,1,3],[1,4,11],[3,2,3],[3,4,2]], k = 3
 <strong>Output:</strong> 17
@@ -26,7 +26,7 @@ Note that the trip 4 -&gt; 1 -&gt; 0 -&gt; 1 is not allowed because you visit th
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173342-2.png" style="height: 200px; width: 217px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2247.Maximum%20Cost%20of%20Trip%20With%20K%20Highways/images/image-20220418173342-2.png" style="height: 200px; width: 217px;" />
 <pre>
 <strong>Input:</strong> n = 4, highways = [[0,1,3],[2,3,2]], k = 2
 <strong>Output:</strong> -1
diff --git a/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README.md b/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README.md
index 7710386832916..ee687a6d88510 100644
--- a/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README.md	
+++ b/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README.md	
@@ -19,7 +19,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-11.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-11.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>circles = [[2,2,1]]
@@ -32,7 +32,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-22.png" style="width: 300px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-22.png" style="width: 300px; height: 300px;" /></p>
 
 <pre>
 <strong>输入：</strong>circles = [[2,2,2],[3,4,1]]
diff --git a/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README_EN.md b/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README_EN.md
index d71884e27e773..4278ce353b92e 100644
--- a/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README_EN.md	
+++ b/solution/2200-2299/2249.Count Lattice Points Inside a Circle/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-11.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-11.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> circles = [[2,2,1]]
 <strong>Output:</strong> 5
@@ -26,7 +26,7 @@ Other points such as (1, 1) and (1, 3), which are shown in red, are not consider
 Hence, the number of lattice points present inside at least one circle is 5.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-22.png" style="width: 300px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2249.Count%20Lattice%20Points%20Inside%20a%20Circle/images/exa-22.png" style="width: 300px; height: 300px;" />
 <pre>
 <strong>Input:</strong> circles = [[2,2,2],[3,4,1]]
 <strong>Output:</strong> 16
diff --git a/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README.md b/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README.md
index 0c4f012293793..0e746eeb8a34f 100644
--- a/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README.md	
+++ b/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README.md	
@@ -18,7 +18,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example1.png" style="width: 300px; height: 509px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example1.png" style="width: 300px; height: 509px;"></p>
 
 <pre><b>输入：</b>rectangles = [[1,2],[2,3],[2,5]], points = [[2,1],[1,4]]
 <b>输出：</b>[2,1]
@@ -33,7 +33,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example2.png" style="width: 300px; height: 312px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example2.png" style="width: 300px; height: 312px;"></p>
 
 <pre><b>输入：</b>rectangles = [[1,1],[2,2],[3,3]], points = [[1,3],[1,1]]
 <b>输出：</b>[1,3]
diff --git a/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README_EN.md b/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README_EN.md
index 9383829dddc5e..9a71ea5f080c6 100644
--- a/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README_EN.md	
+++ b/solution/2200-2299/2250.Count Number of Rectangles Containing Each Point/README_EN.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example1.png" style="width: 300px; height: 509px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example1.png" style="width: 300px; height: 509px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[1,2],[2,3],[2,5]], points = [[2,1],[1,4]]
 <strong>Output:</strong> [2,1]
@@ -28,7 +28,7 @@ Therefore, we return [2, 1].
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example2.png" style="width: 300px; height: 312px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2250.Count%20Number%20of%20Rectangles%20Containing%20Each%20Point/images/example2.png" style="width: 300px; height: 312px;" />
 <pre>
 <strong>Input:</strong> rectangles = [[1,1],[2,2],[3,3]], points = [[1,3],[1,1]]
 <strong>Output:</strong> [1,3]
diff --git a/solution/2200-2299/2251.Number of Flowers in Full Bloom/README.md b/solution/2200-2299/2251.Number of Flowers in Full Bloom/README.md
index 392dbe9d6664d..99c0f870bb337 100644
--- a/solution/2200-2299/2251.Number of Flowers in Full Bloom/README.md	
+++ b/solution/2200-2299/2251.Number of Flowers in Full Bloom/README.md	
@@ -14,7 +14,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex1new.jpg" style="width: 550px; height: 216px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex1new.jpg" style="width: 550px; height: 216px;"></p>
 
 <pre><b>输入：</b>flowers = [[1,6],[3,7],[9,12],[4,13]], persons = [2,3,7,11]
 <b>输出：</b>[1,2,2,2]
@@ -24,7 +24,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex2new.jpg" style="width: 450px; height: 195px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex2new.jpg" style="width: 450px; height: 195px;"></p>
 
 <pre><b>输入：</b>flowers = [[1,10],[3,3]], persons = [3,3,2]
 <b>输出：</b>[2,2,1]
diff --git a/solution/2200-2299/2251.Number of Flowers in Full Bloom/README_EN.md b/solution/2200-2299/2251.Number of Flowers in Full Bloom/README_EN.md
index feffd87126d1d..3117ebaf27ae9 100644
--- a/solution/2200-2299/2251.Number of Flowers in Full Bloom/README_EN.md	
+++ b/solution/2200-2299/2251.Number of Flowers in Full Bloom/README_EN.md	
@@ -10,7 +10,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex1new.jpg" style="width: 550px; height: 216px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex1new.jpg" style="width: 550px; height: 216px;" />
 <pre>
 <strong>Input:</strong> flowers = [[1,6],[3,7],[9,12],[4,13]], persons = [2,3,7,11]
 <strong>Output:</strong> [1,2,2,2]
@@ -19,7 +19,7 @@ For each person, we return the number of flowers in full bloom during their arri
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex2new.jpg" style="width: 450px; height: 195px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2251.Number%20of%20Flowers%20in%20Full%20Bloom/images/ex2new.jpg" style="width: 450px; height: 195px;" />
 <pre>
 <strong>Input:</strong> flowers = [[1,10],[3,3]], persons = [3,3,2]
 <strong>Output:</strong> [2,2,1]
diff --git a/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README.md b/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README.md
index be3c56d7edd81..bac2b4da11c8e 100644
--- a/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README.md	
+++ b/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example1drawio2.png" style="width: 300px; height: 204px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example1drawio2.png" style="width: 300px; height: 204px;"></p>
 
 <pre><b>输入：</b>m = 4, n = 6, guards = [[0,0],[1,1],[2,3]], walls = [[0,1],[2,2],[1,4]]
 <b>输出：</b>7
@@ -26,7 +26,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example2drawio.png" style="width: 200px; height: 201px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example2drawio.png" style="width: 200px; height: 201px;"></p>
 
 <pre><b>输入：</b>m = 3, n = 3, guards = [[1,1]], walls = [[0,1],[1,0],[2,1],[1,2]]
 <b>输出：</b>4
diff --git a/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README_EN.md b/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README_EN.md
index 476f78aa89f95..8b6e01dfdb844 100644
--- a/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README_EN.md	
+++ b/solution/2200-2299/2257.Count Unguarded Cells in the Grid/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example1drawio2.png" style="width: 300px; height: 204px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example1drawio2.png" style="width: 300px; height: 204px;" />
 <pre>
 <strong>Input:</strong> m = 4, n = 6, guards = [[0,0],[1,1],[2,3]], walls = [[0,1],[2,2],[1,4]]
 <strong>Output:</strong> 7
@@ -21,7 +21,7 @@ There are a total of 7 unguarded cells, so we return 7.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example2drawio.png" style="width: 200px; height: 201px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2257.Count%20Unguarded%20Cells%20in%20the%20Grid/images/example2drawio.png" style="width: 200px; height: 201px;" />
 <pre>
 <strong>Input:</strong> m = 3, n = 3, guards = [[1,1]], walls = [[0,1],[1,0],[2,1],[1,2]]
 <strong>Output:</strong> 4
diff --git a/solution/2200-2299/2258.Escape the Spreading Fire/README.md b/solution/2200-2299/2258.Escape the Spreading Fire/README.md
index 9e71594aa62e1..b92f9fb15c4fe 100644
--- a/solution/2200-2299/2258.Escape the Spreading Fire/README.md	
+++ b/solution/2200-2299/2258.Escape the Spreading Fire/README.md	
@@ -26,7 +26,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex1new.jpg" style="width: 650px; height: 404px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex1new.jpg" style="width: 650px; height: 404px;"></p>
 
 <pre><b>输入：</b>grid = [[0,2,0,0,0,0,0],[0,0,0,2,2,1,0],[0,2,0,0,1,2,0],[0,0,2,2,2,0,2],[0,0,0,0,0,0,0]]
 <b>输出：</b>3
@@ -36,7 +36,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex2new2.jpg" style="width: 515px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex2new2.jpg" style="width: 515px; height: 150px;"></p>
 
 <pre><b>输入：</b>grid = [[0,0,0,0],[0,1,2,0],[0,2,0,0]]
 <b>输出：</b>-1
@@ -47,7 +47,7 @@
 
 <p><strong>示例 3：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex3new.jpg" style="width: 174px; height: 150px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex3new.jpg" style="width: 174px; height: 150px;"></p>
 
 <pre><b>输入：</b>grid = [[0,0,0],[2,2,0],[1,2,0]]
 <b>输出：</b>1000000000
diff --git a/solution/2200-2299/2258.Escape the Spreading Fire/README_EN.md b/solution/2200-2299/2258.Escape the Spreading Fire/README_EN.md
index 3a4b6cc80f96f..9c80da1527a8f 100644
--- a/solution/2200-2299/2258.Escape the Spreading Fire/README_EN.md	
+++ b/solution/2200-2299/2258.Escape the Spreading Fire/README_EN.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex1new.jpg" style="width: 650px; height: 404px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex1new.jpg" style="width: 650px; height: 404px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,2,0,0,0,0,0],[0,0,0,2,2,1,0],[0,2,0,0,1,2,0],[0,0,2,2,2,0,2],[0,0,0,0,0,0,0]]
 <strong>Output:</strong> 3
@@ -31,7 +31,7 @@ You will still be able to safely reach the safehouse.
 Staying for more than 3 minutes will not allow you to safely reach the safehouse.</pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex2new2.jpg" style="width: 515px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex2new2.jpg" style="width: 515px; height: 150px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0,0],[0,1,2,0],[0,2,0,0]]
 <strong>Output:</strong> -1
@@ -41,7 +41,7 @@ Thus, -1 is returned.
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex3new.jpg" style="width: 174px; height: 150px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2258.Escape%20the%20Spreading%20Fire/images/ex3new.jpg" style="width: 174px; height: 150px;" />
 <pre>
 <strong>Input:</strong> grid = [[0,0,0],[2,2,0],[1,2,0]]
 <strong>Output:</strong> 1000000000
diff --git a/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README.md b/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README.md
index cbb2c5fb62992..8a84317ba7f6a 100644
--- a/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README.md	
+++ b/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README.md	
@@ -18,7 +18,7 @@
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220315203925-1.png" style="width: 300px; height: 212px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220315203925-1.png" style="width: 300px; height: 212px;">
 <pre><strong>输入：</strong>root = [4,8,5,0,1,null,6]
 <strong>输出：</strong>5
 <strong>解释：</strong>
@@ -30,7 +30,7 @@
 </pre>
 
 <p><strong>示例 2：</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220326133920-1.png" style="width: 80px; height: 76px;">
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220326133920-1.png" style="width: 80px; height: 76px;">
 <pre><strong>输入：</strong>root = [1]
 <strong>输出：</strong>1
 <strong>解释：</strong>对值为 1 的节点：子树的平均值 1 / 1 = 1。
diff --git a/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README_EN.md b/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README_EN.md
index 2ba96a3113ba2..b7957bc3db0f3 100644
--- a/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README_EN.md	
+++ b/solution/2200-2299/2265.Count Nodes Equal to Average of Subtree/README_EN.md	
@@ -15,7 +15,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220315203925-1.png" style="width: 300px; height: 212px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220315203925-1.png" style="width: 300px; height: 212px;" />
 <pre>
 <strong>Input:</strong> root = [4,8,5,0,1,null,6]
 <strong>Output:</strong> 5
@@ -28,7 +28,7 @@ For the node with value 6: The average of its subtree is 6 / 1 = 6.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220326133920-1.png" style="width: 80px; height: 76px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2265.Count%20Nodes%20Equal%20to%20Average%20of%20Subtree/images/image-20220326133920-1.png" style="width: 80px; height: 76px;" />
 <pre>
 <strong>Input:</strong> root = [1]
 <strong>Output:</strong> 1
diff --git a/solution/2200-2299/2266.Count Number of Texts/README.md b/solution/2200-2299/2266.Count Number of Texts/README.md
index 7f98286c11785..68bb85df97606 100644
--- a/solution/2200-2299/2266.Count Number of Texts/README.md	
+++ b/solution/2200-2299/2266.Count Number of Texts/README.md	
@@ -8,7 +8,7 @@
 
 <p>Alice 在给 Bob 用手机打字。数字到字母的 <strong>对应</strong>&nbsp;如下图所示。</p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2266.Count%20Number%20of%20Texts/images/1200px-telephone-keypad2svg.png" style="width: 200px; height: 162px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2266.Count%20Number%20of%20Texts/images/1200px-telephone-keypad2svg.png" style="width: 200px; height: 162px;"></p>
 
 <p>为了 <strong>打出</strong>&nbsp;一个字母，Alice 需要 <strong>按</strong>&nbsp;对应字母 <code>i</code>&nbsp;次，<code>i</code>&nbsp;是该字母在这个按键上所处的位置。</p>
 
diff --git a/solution/2200-2299/2266.Count Number of Texts/README_EN.md b/solution/2200-2299/2266.Count Number of Texts/README_EN.md
index 20c43dca64301..1b5e5dc7b01c2 100644
--- a/solution/2200-2299/2266.Count Number of Texts/README_EN.md	
+++ b/solution/2200-2299/2266.Count Number of Texts/README_EN.md	
@@ -5,7 +5,7 @@
 ## Description
 
 <p>Alice is texting Bob using her phone. The <strong>mapping</strong> of digits to letters is shown in the figure below.</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2266.Count%20Number%20of%20Texts/images/1200px-telephone-keypad2svg.png" style="width: 200px; height: 162px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2266.Count%20Number%20of%20Texts/images/1200px-telephone-keypad2svg.png" style="width: 200px; height: 162px;" />
 <p>In order to <strong>add</strong> a letter, Alice has to <strong>press</strong> the key of the corresponding digit <code>i</code> times, where <code>i</code> is the position of the letter in the key.</p>
 
 <ul>
diff --git a/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README.md b/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README.md
index aebc46f2a245e..5323fe2a3e52b 100644
--- a/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README.md	
+++ b/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README.md	
@@ -29,7 +29,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example1drawio.png" style="width: 521px; height: 300px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example1drawio.png" style="width: 521px; height: 300px;" /></p>
 
 <pre>
 <b>输入：</b>grid = [["(","(","("],[")","(",")"],["(","(",")"],["(","(",")"]]
@@ -42,7 +42,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example2drawio.png" style="width: 165px; height: 165px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example2drawio.png" style="width: 165px; height: 165px;" /></p>
 
 <pre>
 <b>输入：</b>grid = [[")",")"],["(","("]]
diff --git a/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README_EN.md b/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README_EN.md
index 9c0c7827b80f3..2e278471df1aa 100644
--- a/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README_EN.md	
+++ b/solution/2200-2299/2267.Check if There Is a Valid Parentheses String Path/README_EN.md	
@@ -25,7 +25,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example1drawio.png" style="width: 521px; height: 300px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example1drawio.png" style="width: 521px; height: 300px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;(&quot;,&quot;(&quot;,&quot;(&quot;],[&quot;)&quot;,&quot;(&quot;,&quot;)&quot;],[&quot;(&quot;,&quot;(&quot;,&quot;)&quot;],[&quot;(&quot;,&quot;(&quot;,&quot;)&quot;]]
 <strong>Output:</strong> true
@@ -36,7 +36,7 @@ Note that there may be other valid parentheses string paths.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example2drawio.png" style="width: 165px; height: 165px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2267.Check%20if%20There%20Is%20a%20Valid%20Parentheses%20String%20Path/images/example2drawio.png" style="width: 165px; height: 165px;" />
 <pre>
 <strong>Input:</strong> grid = [[&quot;)&quot;,&quot;)&quot;],[&quot;(&quot;,&quot;(&quot;]]
 <strong>Output:</strong> false
diff --git a/solution/2200-2299/2268.Minimum Number of Keypresses/README.md b/solution/2200-2299/2268.Minimum Number of Keypresses/README.md
index 853b463c08038..9bcaef4412e60 100644
--- a/solution/2200-2299/2268.Minimum Number of Keypresses/README.md	
+++ b/solution/2200-2299/2268.Minimum Number of Keypresses/README.md	
@@ -22,7 +22,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505184346-1.png" style="width: 300px; height: 293px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505184346-1.png" style="width: 300px; height: 293px;" />
 <pre>
 <strong>Input:</strong> s = &quot;apple&quot;
 <strong>Output:</strong> 5
@@ -36,7 +36,7 @@ A total of 5 button presses are needed, so return 5.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505203823-1.png" style="width: 300px; height: 288px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505203823-1.png" style="width: 300px; height: 288px;" />
 <pre>
 <strong>Input:</strong> s = &quot;abcdefghijkl&quot;
 <strong>Output:</strong> 15
diff --git a/solution/2200-2299/2268.Minimum Number of Keypresses/README_EN.md b/solution/2200-2299/2268.Minimum Number of Keypresses/README_EN.md
index 938d9725b3dd3..736221bb02e7c 100644
--- a/solution/2200-2299/2268.Minimum Number of Keypresses/README_EN.md	
+++ b/solution/2200-2299/2268.Minimum Number of Keypresses/README_EN.md	
@@ -20,7 +20,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505184346-1.png" style="width: 300px; height: 293px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505184346-1.png" style="width: 300px; height: 293px;" />
 <pre>
 <strong>Input:</strong> s = &quot;apple&quot;
 <strong>Output:</strong> 5
@@ -34,7 +34,7 @@ A total of 5 button presses are needed, so return 5.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505203823-1.png" style="width: 300px; height: 288px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2268.Minimum%20Number%20of%20Keypresses/images/image-20220505203823-1.png" style="width: 300px; height: 288px;" />
 <pre>
 <strong>Input:</strong> s = &quot;abcdefghijkl&quot;
 <strong>Output:</strong> 15
diff --git a/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README.md b/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README.md
index 01512ff520df3..00c4dbbc698cc 100644
--- a/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README.md	
+++ b/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README.md	
@@ -16,7 +16,7 @@
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example1drawio3.png" style="width: 644px; height: 158px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example1drawio3.png" style="width: 644px; height: 158px;" /></p>
 
 <pre>
 <b>输入：</b>tiles = [[1,5],[10,11],[12,18],[20,25],[30,32]], carpetLen = 10
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example2drawio.png" style="width: 231px; height: 168px;" /></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example2drawio.png" style="width: 231px; height: 168px;" /></p>
 
 <pre>
 <strong>输入：</strong>tiles = [[10,11],[1,1]], carpetLen = 2
diff --git a/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README_EN.md b/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README_EN.md
index 734d4f36d1d91..e92a8e12b4359 100644
--- a/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README_EN.md	
+++ b/solution/2200-2299/2271.Maximum White Tiles Covered by a Carpet/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example1drawio3.png" style="width: 644px; height: 158px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example1drawio3.png" style="width: 644px; height: 158px;" />
 <pre>
 <strong>Input:</strong> tiles = [[1,5],[10,11],[12,18],[20,25],[30,32]], carpetLen = 10
 <strong>Output:</strong> 9
@@ -23,7 +23,7 @@ It can be shown that the carpet cannot cover more than 9 white tiles.
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example2drawio.png" style="width: 231px; height: 168px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2271.Maximum%20White%20Tiles%20Covered%20by%20a%20Carpet/images/example2drawio.png" style="width: 231px; height: 168px;" />
 <pre>
 <strong>Input:</strong> tiles = [[10,11],[1,1]], carpetLen = 2
 <strong>Output:</strong> 2
diff --git a/solution/2200-2299/2277.Closest Node to Path in Tree/README.md b/solution/2200-2299/2277.Closest Node to Path in Tree/README.md
index f010e2be8059f..63eab9bd7a290 100644
--- a/solution/2200-2299/2277.Closest Node to Path in Tree/README.md	
+++ b/solution/2200-2299/2277.Closest Node to Path in Tree/README.md	
@@ -14,7 +14,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132158-1.png" style="width: 300px; height: 211px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132158-1.png" style="width: 300px; height: 211px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[0,1],[0,2],[0,3],[1,4],[2,5],[2,6]], query = [[5,3,4],[5,3,6]]
 <strong>Output:</strong> [0,2]
@@ -27,7 +27,7 @@ Node 2 is the node on the path closest to node 6, so the answer to the second qu
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132318-2.png" style="width: 300px; height: 89px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132318-2.png" style="width: 300px; height: 89px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[1,2]], query = [[0,1,2]]
 <strong>Output:</strong> [1]
@@ -38,7 +38,7 @@ Node 1 is the node on the path closest to node 2, so the answer to the first que
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132333-3.png" style="width: 300px; height: 89px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132333-3.png" style="width: 300px; height: 89px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[1,2]], query = [[0,0,0]]
 <strong>Output:</strong> [0]
diff --git a/solution/2200-2299/2277.Closest Node to Path in Tree/README_EN.md b/solution/2200-2299/2277.Closest Node to Path in Tree/README_EN.md
index d5ac5d8450cb6..b44f7a4b4ec10 100644
--- a/solution/2200-2299/2277.Closest Node to Path in Tree/README_EN.md	
+++ b/solution/2200-2299/2277.Closest Node to Path in Tree/README_EN.md	
@@ -12,7 +12,7 @@
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132158-1.png" style="width: 300px; height: 211px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132158-1.png" style="width: 300px; height: 211px;" />
 <pre>
 <strong>Input:</strong> n = 7, edges = [[0,1],[0,2],[0,3],[1,4],[2,5],[2,6]], query = [[5,3,4],[5,3,6]]
 <strong>Output:</strong> [0,2]
@@ -25,7 +25,7 @@ Node 2 is the node on the path closest to node 6, so the answer to the second qu
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132318-2.png" style="width: 300px; height: 89px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132318-2.png" style="width: 300px; height: 89px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[1,2]], query = [[0,1,2]]
 <strong>Output:</strong> [1]
@@ -36,7 +36,7 @@ Node 1 is the node on the path closest to node 2, so the answer to the first que
 </pre>
 
 <p><strong>Example 3:</strong></p>
-<img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132333-3.png" style="width: 300px; height: 89px;" />
+<img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2277.Closest%20Node%20to%20Path%20in%20Tree/images/image-20220514132333-3.png" style="width: 300px; height: 89px;" />
 <pre>
 <strong>Input:</strong> n = 3, edges = [[0,1],[1,2]], query = [[0,0,0]]
 <strong>Output:</strong> [0]
diff --git a/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README.md b/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README.md
index 5cdaa59ca7fd9..33edd372f9f7e 100644
--- a/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README.md	
+++ b/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README.md	
@@ -7,14 +7,14 @@
 <!-- 这里写题目描述 -->
 
 <p>给你一个二维整数数组&nbsp;<code>stockPrices</code> ，其中&nbsp;<code>stockPrices[i] = [day<sub>i</sub>, price<sub>i</sub>]</code>&nbsp;表示股票在&nbsp;<code>day<sub>i</sub></code>&nbsp;的价格为&nbsp;<code>price<sub>i</sub></code>&nbsp;。<strong>折线图</strong>&nbsp;是一个二维平面上的若干个点组成的图，横坐标表示日期，纵坐标表示价格，折线图由相邻的点连接而成。比方说下图是一个例子：</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/1920px-pushkin_population_historysvg.png" style="width: 500px; height: 313px;">
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/1920px-pushkin_population_historysvg.png" style="width: 500px; height: 313px;">
 <p>请你返回要表示一个折线图所需要的 <strong>最少线段数</strong>&nbsp;。</p>
 
 <p>&nbsp;</p>
 
 <p><strong>示例 1：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex0.png" style="width: 400px; height: 400px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex0.png" style="width: 400px; height: 400px;"></p>
 
 <pre><b>输入：</b>stockPrices = [[1,7],[2,6],[3,5],[4,4],[5,4],[6,3],[7,2],[8,1]]
 <b>输出：</b>3
@@ -29,7 +29,7 @@
 
 <p><strong>示例 2：</strong></p>
 
-<p><img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex1.png" style="width: 325px; height: 325px;"></p>
+<p><img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex1.png" style="width: 325px; height: 325px;"></p>
 
 <pre><b>输入：</b>stockPrices = [[3,4],[1,2],[7,8],[2,3]]
 <b>输出：</b>1
diff --git a/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README_EN.md b/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README_EN.md
index 76dfc2ab48902..d9d39fc56604d 100644
--- a/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README_EN.md	
+++ b/solution/2200-2299/2280.Minimum Lines to Represent a Line Chart/README_EN.md	
@@ -5,12 +5,12 @@
 ## Description
 
 <p>You are given a 2D integer array <code>stockPrices</code> where <code>stockPrices[i] = [day<sub>i</sub>, price<sub>i</sub>]</code> indicates the price of the stock on day <code>day<sub>i</sub></code> is <code>price<sub>i</sub></code>. A <strong>line chart</strong> is created from the array by plotting the points on an XY plane with the X-axis representing the day and the Y-axis representing the price and connecting adjacent points. One such example is shown below:</p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/1920px-pushkin_population_historysvg.png" style="width: 500px; height: 313px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/1920px-pushkin_population_historysvg.png" style="width: 500px; height: 313px;" />
 <p>Return <em>the <strong>minimum number of lines</strong> needed to represent the line chart</em>.</p>
 
 <p>&nbsp;</p>
 <p><strong>Example 1:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex0.png" style="width: 400px; height: 400px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex0.png" style="width: 400px; height: 400px;" />
 <pre>
 <strong>Input:</strong> stockPrices = [[1,7],[2,6],[3,5],[4,4],[5,4],[6,3],[7,2],[8,1]]
 <strong>Output:</strong> 3
@@ -24,7 +24,7 @@ It can be shown that it is not possible to represent the line chart using less t
 </pre>
 
 <p><strong>Example 2:</strong></p>
-<img alt="" src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex1.png" style="width: 325px; height: 325px;" />
+<img alt="" src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/2200-2299/2280.Minimum%20Lines%20to%20Represent%20a%20Line%20Chart/images/ex1.png" style="width: 325px; height: 325px;" />
 <pre>
 <strong>Input:</strong> stockPrices = [[3,4],[1,2],[7,8],[2,3]]
 <strong>Output:</strong> 1
diff --git a/solution/main.py b/solution/main.py
index d4944774082a2..6edf992436a1f 100644
--- a/solution/main.py
+++ b/solution/main.py
@@ -160,7 +160,7 @@ def refresh(result):
                 os.path.basename(url).replace('.PNG', '.png').replace('.JPG', '.jpg')
             )
             new_url = (
-                'https://cdn.jsdelivr.net/gh/doocs/leetcode@main'
+                'https://fastly.jsdelivr.net/gh/doocs/leetcode@main'
                 + str(question['relative_path_cn']).replace("README.md", "images/")
                 + image_name
             )
@@ -181,7 +181,7 @@ def refresh(result):
                 os.path.basename(url).replace('.PNG', '.png').replace('.JPG', '.jpg')
             )
             new_url = (
-                'https://cdn.jsdelivr.net/gh/doocs/leetcode@main'
+                'https://fastly.jsdelivr.net/gh/doocs/leetcode@main'
                 + str(question['relative_path_cn']).replace("README.md", "images/")
                 + image_name
             )