diff --git a/jump-game/hwanmini.js b/jump-game/hwanmini.js
new file mode 100644
index 00000000..24be1fb4
--- /dev/null
+++ b/jump-game/hwanmini.js
@@ -0,0 +1,20 @@
+// 시간복잡도: O(n)
+// 공간복잡도: O(1)
+
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ */
+var canJump = function(nums) {
+    let fast = 0;
+
+    for (let i = 0; i < nums.length; i++) {
+        if (i > 0 && i > fast) return false
+
+        fast = Math.max(fast, i + nums[i])
+
+        if (fast >= nums.length -1) return true
+    }
+
+    return false
+};
diff --git a/search-in-rotated-sorted-array/hwanmini.js b/search-in-rotated-sorted-array/hwanmini.js
new file mode 100644
index 00000000..40a319d7
--- /dev/null
+++ b/search-in-rotated-sorted-array/hwanmini.js
@@ -0,0 +1,34 @@
+// 시간복잡도: O(log n)
+// 공간복잡도: O(1)
+
+/**
+ * @param {number[]} nums
+ * @param {number} target
+ * @return {number}
+ */
+var search = function(nums, target) {
+    let leftIdx = 0;
+    let rightIdx = nums.length - 1;
+
+    while (leftIdx <= rightIdx) {
+        const midIdx = Math.floor((leftIdx + rightIdx) / 2);
+
+        if (nums[midIdx] === target) return midIdx;
+
+        if (nums[leftIdx] <= nums[midIdx]) {
+            if (nums[leftIdx] <= target && nums[midIdx] >= target) {
+                rightIdx = midIdx - 1;
+            } else {
+                leftIdx = midIdx + 1;
+            }
+        } else {
+            if (nums[rightIdx] >= target && nums[midIdx] <= target) {
+                leftIdx = midIdx + 1;
+            } else {
+                rightIdx = midIdx - 1;
+            }
+        }
+    }
+
+    return -1
+};