Leetcode

#	Title	Solution	Runtime
1	Two Sum	Python3	102 ms
2	Add Two Numbers	Python3	120 ms
3	Longest Substring Without Repeating Characters	Python3	129 ms
4	Median of Two Sorted Arrays	Python3	156 ms
5	Longest Palindromic Substring	Python3	319 ms
9	Palindrome Number	Python3	51 ms
11	Container With Most Water	Python3	533 ms
14	Longest Common Prefix	Python3	29 ms
15	3Sum	Python3	913 ms
16	3Sum Closest	Python3	416 ms
18	4Sum	Python3	414 ms
19	Remove Nth Node From End of List	Python3	34 ms
20	Valid Parentheses	Python3	46 ms
21	Merge Two Sorted Lists	Python3	34 ms
24	Swap Nodes in Pairs	Python3	30 ms
25	Reverse Nodes in k-Group	Python3	46 ms
26	Remove Duplicates from Sorted Array	Python3	90 ms
27	Remove Element	Python3	44 ms
28	Find the Index of the First Occurrence in a String	Python3	40 ms
31	Next Permutation	Python3	51 ms
34	Find First and Last Position of Element in Sorted Array	Python3	172 ms
41	First Missing Positive	C++	120 ms
42	Trapping Rain Water	Python3	100 ms
49	Group Anagrams	Python3	107 ms
53	Maximum Subarray	Python3	593 ms
58	Length of Last Word	Python3	47 ms
61	Rotate List	Python3	34 ms
66	Plus One	Python3	35 ms
75	Sort Colors	Python3	48 ms
82	Remove Duplicates from Sorted List II	Python3	40 ms
83	Remove Duplicates from Sorted List	Python3	41 ms
86	Partition List	Python3	36 ms
88	Merge Sorted Array	Python3	42 ms
92	Reverse Linked List II	Python3	32 ms
94	Binary Tree Inorder Traversal	Python3	35 ms
96	Unique Binary Search Trees	Python3	32 ms
98	Validate Binary Search Tree	Python3	40 ms
99	Recover Binary Search Tree	Python3	80 ms
100	Same Tree	Python3	43 ms
101	Symmetric Tree	Python3	34 ms
102	Binary Tree Level Order Traversal	Python3	42 ms
103	Binary Tree Zigzag Level Order Traversal	Python3	35 ms
104	Maximum Depth of Binary Tree	Python3	43 ms
105	Construct Binary Tree from Preorder and Inorder Traversal	Python3	56 ms
106	Construct Binary Tree from Inorder and Postorder Traversal	Python3	60 ms
107	Binary Tree Level Order Traversal II	Python3	43 ms
108	Convert Sorted Array to Binary Search Tree	Python3	56 ms
109	Convert Sorted List to Binary Search Tree	Python3	128 ms
110	Balanced Binary Tree	Python3	53 ms
111	Minimum Depth of Binary Tree	Python3	564 ms
112	Path Sum	Python3	35 ms
113	Path Sum II	Python3	55 ms
114	Flatten Binary Tree to Linked List	Python3	41 ms
116	Populating Next Right Pointers in Each Node	Python3	67 ms
117	Populating Next Right Pointers in Each Node II	Python3	47 ms
121	Best Time to Buy and Sell Stock	Python3	886 ms
125	Valid Palindrome	Python3	50 ms
129	Sum Root to Leaf Numbers	Python3	39 ms
136	Single Number	Python3	115 ms
141	Linked List Cycle	Python3	58 ms
142	Linked List Cycle II	Python3	53 ms
143	Reorder List	Python3	94 ms
144	Binary Tree Preorder Traversal	Python3	45 ms
145	Binary Tree Postorder Traversal	Python3	36 ms
148	Sort List	Python3	665 ms
150	Evaluate Reverse Polish Notation	Python3	56 ms
160	Intersection of Two Linked Lists	Python3	157 ms
167	Two Sum II - Input array is sorted	Python3	64 ms
169	Majority Element	Python3	156 ms
173	Binary Search Tree Iterator	Python3	72 ms
175	Combine Two Tables	MySQL	1082 ms
176	Second Highest Salary	MySQL	593 ms
177	Nth Highest Salary	MySQL	781 ms
178	Rank Scores	MySQL	737 ms
180	Consecutive Numbers	Oracle	929 ms
181	Employees Earning More Than Their Managers	MySQL	632 ms
182	Duplicate Emails	MySQL	653 ms
183	Customers Who Never Order	MySQL	1243 ms
184	Department Highest Salary	MySQL	1388 ms
185	Department Top Three Salaries	MySQL	1634 ms
189	Rotate Array	Python3	181 ms
196	Delete Duplicate Emails	MySQL	1277 ms
197	Rising Temperature	MySQL	763 ms
199	Binary Tree Right Side View	Python3	33 ms
202	Happy Number	Python3	38 ms
203	Remove Linked List Elements	Python3	75 ms
206	Reverse Linked List	Python3	41 ms
207	Course Schedule	Python3	96 ms
210	Course Schedule II	Python3	96 ms
217	Contains Duplicate	Python3	435 ms
219	Contains Duplicate II	Python3	1644 ms
222	Count Complete Tree Nodes	Python3	78 ms
225	Implement Stack using Queues	Python3	28 ms
226	Invert Binary Tree	Python3	33 ms
227	Basic Calculator II	Python3	272 ms
229	Majority Element II	Python3	129 ms
230	Kth Smallest Element in a BST	Python3	58 ms
232	Implement Queue using Stacks	Python3	40 ms
234	Palindrome Linked List	Python3	523 ms
235	Lowest Common Ancestor of a Binary Search Tree	Python3	80 ms
236	Lowest Common Ancestor of a Binary Tree	Python3	54 ms
242	Valid Anagram	Python3	52 ms
257	Binary Tree Paths	Python3	34 ms
258	Add Digits	Python3	45 ms
262	Trips and Users	MySQL	1105 ms
268	Missing Number	Python3	119 ms
283	Move Zeroes	Python3	137 ms
287	Find the Duplicate Number	C++	236 ms
316	Remove Duplicate Letters	Python3	40 ms
328	Odd Even Linked List	Python3	51 ms
344	Reverse String	Python3	193 ms
345	Reverse Vowels of a String	Python3	60 ms
347	Top K Frequent Elements	Python3	97 ms
349	Intersection of Two Arrays	Python3	53 ms
350	Intersection of Two Arrays II	Python3	64 ms
383	Ransom Note	Python3	65 ms
387	First Unique Character in a String	Python3	385 ms
389	Find the Difference	Python3	50 ms
392	Is Subsequence	Python3	42 ms
394	Decode String	Python3	28 ms
402	Remove K Digits	Python3	40 ms
404	Sum of Left Leaves	Python3	24 ms
437	Path Sum III	Python3	928 ms
442	Find All Duplicates in an Array	Python3	289 ms
445	Add Two Numbers II	Python3	64 ms
449	Serialize and Deserialize BST	Python3	112 ms
450	Delete Node in a BST	Python3	72 ms
456	132 Pattern	Python3	536 ms
485	Max Consecutive Ones	Python3	313 ms
494	Target Sum	Python3	217 ms
496	Next Greater Element I	Python3	48 ms
501	Find Mode in Binary Search Tree	Python3	61 ms
503	Next Greater Element II	Python3	234 ms
508	Most Frequent Subtree Sum	Python3	52 ms
511	Game Play Analysis I	Oracle	885 ms
513	Find Bottom Left Tree Value	Python3	44 ms
515	Find Largest Value in Each Tree Row	Python3	46 ms
520	Detect Capital	Python3	62 ms
530	Minimum Absolute Difference in BST	Python3	56 ms
538	Convert BST to Greater Tree	Python3	84 ms
541	Reverse String II	Python3	42 ms
543	Diameter of Binary Tree	Python3	39 ms
547	Number of Provinces	Python3	196 ms
557	Reverse Words in a String III	Python3	36 ms
563	Binary Tree Tilt	Python3	56 ms
572	Subtree of Another Tree	Python3	228 ms
577	Employee Bonus	MySQL	2269 ms
579	Find Cumulative Salary of an Employee	MySQL	694 ms
584	Find Customer Referee	MySQL	983 ms
585	Investments in 2016	MySQL	886 ms
586	Customer Placing the Largest Number of Orders	Oracle	738 ms
595	Big Countries	MySQL	453 ms
596	Classes More Than 5 Students	Oracle	526 ms
599	Minimum Index Sum of Two Lists	Python3	312 ms
606	Construct String from Binary Tree	Python3	48 ms
607	Sales Person	Oracle	2918 ms
608	Tree Node	Oracle	665 ms
611	Valid Triangle Number	Python3	979 ms
615	Average Salary: Departments VS Company	MySQL	564 ms
617	Merge Two Binary Trees	Python3	74 ms
618	Students Report By Geography	MySQL	417 ms
619	Biggest Single Number	Oracle	614 ms
620	Not Boring Movies	Oracle	510 ms
623	Add One Row to Tree	Python3	52 ms
626	Exchange Seats	Oracle	548 ms
627	Swap Salary	Oracle	818 ms
637	Average of Levels in Binary Tree	Python3	55 ms
654	Maximum Binary Tree	Python3	252 ms
657	Robot Return to Origin	Python3	60 ms
662	Maximum Width of Binary Tree	Python3	44 ms
669	Trim a Binary Search Tree	Python3	96 ms
671	Second Minimum Node In a Binary Tree	Python3	24 ms
682	Baseball Game	Python3	44 ms
700	Search in a Binary Search Tree	Python3	76 ms
701	Insert into a Binary Search Tree	Python3	120 ms
704	Binary Search	Python3	205 ms
707	Design Linked List	Python3	190 ms
709	To Lower Case	Python3	33 ms
724	Find Pivot Index	Python3	114 ms
725	Split Linked List in Parts	Python3	40 ms
735	Asteroid Collision	Python3	86 ms
739	Daily Temperatures	Python3	1466 ms
743	Network Delay Time	Python3	476 ms
744	Find Smallest Letter Greater Than Target	Python3	111 ms
771	Jewels and Stones	Python3	41 ms
783	Minimum Distance Between BST Nodes	Python3	24 ms
785	Is Graph Bipartite?	Python3	291 ms
787	Cheapest Flights Within K Stops	Python3	104 ms
797	All Paths From Source to Target	Python3	88 ms
804	Unique Morse Code Words	Python3	32 ms
814	Binary Tree Pruning	Python3	32 ms
841	Keys and Rooms	Python3	64 ms
844	Backspace String Compare	Python3	26 ms
856	Score of Parentheses	Python3	28 ms
865	Smallest Subtree with all the Deepest Nodes	Python3	44 ms
872	Leaf-Similar Trees	Python3	28 ms
876	Middle of the Linked List	Python3	41 ms
880	Decoded String at Index	Python3	36 ms
897	Increasing Order Search Tree	Python3	32 ms
907	Sum of Subarray Minimums	Python3	628 ms
917	Reverse Only Letters	Python3	37 ms
919	Complete Binary Tree Inserter	Python3	468 ms
921	Minimum Add to Make Parentheses Valid	Python3	48 ms
938	Range Sum of BST	Python3	105 ms
946	Validate Stack Sequences	Python3	76 ms
951	Flip Equivalent Binary Trees	Python3	32 ms
958	Check Completeness of a Binary Tree	Python3	36 ms
965	Univalued Binary Tree	Python3	28 ms
976	Largest Perimeter Triangle	Python3	206 ms
988	Smallest String Starting From Leaf	Python3	72 ms
993	Cousins in Binary Tree	Python3	32 ms
997	Find the Town Judge	Python3	720 ms
998	Maximum Binary Tree II	Python3	40 ms
1003	Check If Word Is Valid After Substitutions	Python3	67 ms
1008	Construct Binary Search Tree from Preorder Traversal	Python3	36 ms
1021	Remove Outermost Parentheses	Python3	40 ms
1022	Sum of Root To Leaf Binary Numbers	Python3	48 ms
1026	Maximum Difference Between Node and Ancestor	Python3	44 ms
1038	Binary Search Tree to Greater Sum Tree	Python3	41 ms
1045	Customers Who Bought All Products	Oracle	735 ms
1047	Remove All Adjacent Duplicates In String	Python3	75 ms
1050	Actors and Directors Who Cooperated At Least Three Times	Oracle	878 ms
1051	Height Checker	Python3	81 ms
1068	Product Sales Analysis I	MySQL	3245 ms
1081	Smallest Subsequence of Distinct Characters	Python3	36 ms
1084	Sales Analysis III	MySQL	1795 ms
1104	Path In Zigzag Labelled Binary Tree	Python3	28 ms
1108	Defanging an IP Address	Python3	42 ms
1110	Delete Nodes And Return Forest	Python3	96 ms
1123	Lowest Common Ancestor of Deepest Leaves	Python3	64 ms
1141	User Activity for the Past 30 Days I	MySQL	820 ms
1148	Article Views I	MySQL	814 ms
1158	Market Analysis I	Oracle	1517 ms
1161	Maximum Level Sum of a Binary Tree	Python3	245 ms
1173	Immediate Food Delivery I	MySQL	1016 ms
1174	Immediate Food Delivery II	MySQL	1695 ms
1179	Reformat Department Table	MS SQL Server	1597 ms
1190	Reverse Substrings Between Each Pair of Parentheses	Python3	40 ms
1204	Last Person to Fit in the Bus	MySQL	1319 ms
1207	Unique Number of Occurrences	Python3	39 ms
1209	Remove All Adjacent Duplicates in String II	Python3	176 ms
1249	Minimum Remove to Make Valid Parentheses	Python3	152 ms
1251	Average Selling Price	MySQL	1637 ms
1261	Find Elements in a Contaminated Binary Tree	Python3	752 ms
1281	Subtract the Product and Sum of Digits of an Integer	Python3	38 ms
1282	Group the People Given the Group Size They Belong To	Python3	61 ms
1290	Convert Binary Number in a Linked List to Integer	Python3	35 ms
1302	Deepest Leaves Sum	Python3	167 ms
1305	All Elements in Two Binary Search Trees	Python3	322 ms
1313	Decompress Run-Length Encoded List	Python3	62 ms
1315	Sum of Nodes with Even-Valued Grandparent	Python3	108 ms
1325	Delete Leaves With a Given Value	Python3	48 ms
1331	Rank Transform of an Array	Python3	364 ms
1339	Maximum Product of Splitted Binary Tree	Python3	388 ms
1361	Validate Binary Tree Nodes	Python3	304 ms
1365	How Many Numbers Are Smaller Than the Current Number	Python3	93 ms
1367	Linked List in Binary Tree	Python3	104 ms
1378	Replace Employee ID With The Unique Identifier	MySQL	2213 ms
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Python3	656 ms
1381	Design a Stack With Increment Operation	Python3	356 ms
1382	Balance a Binary Search Tree	Python3	776 ms
1393	Capital Gain/Loss	MySQL	1087 ms
1407	Top Travellers	Oracle	1049 ms
1431	Kids With the Greatest Number of Candies	Python3	47 ms
1436	Destination City	Python3	60 ms
1441	Build an Array With Stack Operations	Python3	28 ms
1448	Count Good Nodes in Binary Tree	Python3	127 ms
1450	Number of Students Doing Homework at a Given Time	Python3	40 ms
1457	Pseudo-Palindromic Paths in a Binary Tree	Python3	864 ms
1464	Maximum Product of Two Elements in an Array	Python3	52 ms
1470	Shuffle the Array	Python3	51 ms
1479	Sales by Day of the Week	MS SQL Server	843 ms
1480	Running Sum of 1d Array	Python3	39 ms
1484	Group Sold Products By The Date	MySQL	1186 ms
1486	XOR Operation in an Array	Python3	33 ms
1491	Average Salary Excluding the Minimum and Maximum Salary	Python3	32 ms
1492	The kth Factor of n	Python3	51 ms
1512	Number of Good Pairs	Python3	26 ms
1527	Patients With a Condition	Oracle	585 ms
1528	Shuffle String	Python3	117 ms
1530	Number of Good Leaf Nodes Pairs	Python3	N/A
1541	Minimum Insertions to Balance a Parentheses String	Python3	296 ms
1544	Make The String Great	Python3	33 ms
1572	Matrix Diagonal Sum	Python3	95 ms
1581	Customer Who Visited but Did Not Make Any Transactions	MySQL	2118 ms
1587	Bank Account Summary II	MySQL	1613 ms
1588	Sum of All Odd Length Subarrays	Python3	73 ms
1598	Crawler Log Folder	Python3	52 ms
1609	Even Odd Tree	Python3	564 ms
1614	Maximum Nesting Depth of the Parentheses	Python3	38 ms
1661	Average Time of Process per Machine	MySQL	418 ms
1662	Check If Two String Arrays are Equivalent	Python3	31 ms
1667	Fix Names in a Table	Oracle	716 ms
1669	Merge In Between Linked Lists	Python3	329 ms
1672	Richest Customer Wealth	Python3	58 ms
1673	Find the Most Competitive Subsequence	Python3	1360 ms
1678	Goal Parser Interpretation	Python3	36 ms
1683	Invalid Tweets	MySQL	1122 ms
1684	Count the Number of Consistent Strings	Python3	210 ms
1688	Count of Matches in Tournament	Python3	33 ms
1693	Daily Leads and Partners	MySQL	1309 ms
1721	Swapping Nodes in a Linked List	Python3	1795 ms
1729	Find Followers Count	Oracle	926 ms
1732	Find the Highest Altitude	Python3	44 ms
1741	Find Total Time Spent by Each Employee	MySQL	1202 ms
1748	Sum of Unique Elements	Python3	34 ms
1752	Check if Array Is Sorted and Rotated	Python3	44 ms
1757	Recyclable and Low Fat Products	MySQL	1036 ms
1767	Find the Subtasks That Did Not Execute	MS SQL Server	2118 ms
1795	Rearrange Products Table	MySQL	1167 ms
1816	Truncate Sentence	Python3	30 ms
1832	Check if the Sentence Is Pangram	Python3	38 ms
1833	Maximum Ice Cream Bars	C++	156 ms
1859	Sorting the Sentence	Python3	29 ms
1873	Calculate Special Bonus	Oracle	775 ms
1890	The Latest Login in 2020	Oracle	1070 ms
1907	Count Salary Categories	MySQL	3138 ms
1913	Maximum Product Difference Between Two Pairs	Python3	163 ms
1920	Build Array from Permutation	Python3	101 ms
1929	Concatenation of Array	Python3	78 ms
1934	Confirmation Rate	MySQL	1685 ms
1965	Employees With Missing Information	Oracle	760 ms
1967	Number of Strings That Appear as Substrings in Word	Python3	42 ms
1978	Employees Whose Manager Left the Company	Oracle	555 ms
1991	Find the Middle Index in Array	Python3	45 ms
2006	Count Number of Pairs With Absolute Difference K	Python3	61 ms
2011	Final Value of Variable After Performing Operations	Python3	59 ms
2016	Maximum Difference Between Increasing Elements	Python3	39 ms
2042	Check if Numbers Are Ascending in a Sentence	Python3	37 ms
2082	The Number of Rich Customers	MySQL	1255 ms
2085	Count Common Words With One Occurrence	Python3	74 ms
2089	Find Target Indices After Sorting Array	Python3	48 ms
2095	Delete the Middle Node of a Linked List	Python3	1236 ms
2108	Find First Palindromic String in the Array	Python3	102 ms
2109	Adding Spaces to a String	Python3	698 ms
2114	Maximum Number of Words Found in Sentences	Python3	47 ms
2119	A Number After a Double Reversal	Python3	34 ms
2124	Check if All A's Appears Before All B's	Python3	29 ms
2126	Destroying Asteroids	Python3	1085 ms
2129	Capitalize the Title	Python3	65 ms
2130	Maximum Twin Sum of a Linked List	Python3	647 ms
2149	Rearrange Array Elements by Sign	Python3	1189 ms
2180	Count Integers With Even Digit Sum	Python3	33 ms
2181	Merge Nodes in Between Zeros	Python3	1020 ms
2185	Counting Words With a Given Prefix	Python3	49 ms
2215	Find the Difference of Two Arrays	Python3	163 ms
2235	Add Two Integers	Python3	39 ms
2236	Root Equals Sum of Children	Python3	36 ms
2351	First Letter to Appear Twice	Python3	34 ms
2356	Number of Unique Subjects Taught by Each Teacher	MySQL	1068 ms
2357	Make Array Zero by Subtracting Equal Amounts	Python3	42 ms
2362	Generate the Invoice	Oracle	1367 ms
2367	Number of Arithmetic Triplets	Python3	47 ms
2390	Removing Stars From a String	Python3	233 ms
2413	Smallest Even Multiple	Python3	40 ms
2418	Sort the People	Python3	114 ms
2455	Average Value of Even Numbers That Are Divisible by Three	Python3	79 ms
2460	Apply Operations to an Array	Python3	55 ms
2469	Convert the Temperature	Python3	40 ms
2485	Find the Pivot Integer	Python3	54 ms
2523	Closest Prime Numbers in Range	Python3	3025 ms
2529	Maximum Count of Positive Integer and Negative Integer	Python3	131 ms
2540	Minimum Common Value	Python3	381 ms
2544	Alternating Digit Sum	Python3	23 ms
2545	Sort the Students by Their Kth Score	Python3	373 ms
2549	Count Distinct Numbers on Board	Python3	44 ms
2553	Separate the Digits in an Array	Python3	80 ms
2574	Left and Right Sum Differences	Python3	64 ms
2652	Sum Multiples	Python3	75 ms
2678	Number of Senior Citizens	Python3	50 ms
2769	Find the Maximum Achievable Number	Python3	43 ms
2798	Number of Employees Who Met the Target	Python3	38 ms
2807	Insert Greatest Common Divisors in Linked List	Python3	70 ms
2810	Faulty Keyboard	Python3	46 ms
2816	Double a Number Represented as a Linked List	Python3	490 ms
2828	Check if a String Is an Acronym of Words	Python3	60 ms
2878	Get the Size of a DataFrame	Pandas	542 ms
2879	Display the First Three Rows	Pandas	646 ms
2881	Create a New Column	Pandas	464 ms
2884	Modify Columns	Pandas	575 ms
2888	Reshape Data: Concatenate	Pandas	469 ms
2942	Find Words Containing Character	Python3	59 ms
3028	Ant on the Boundary	Python3	49 ms
3057	Employees Project Allocation	MySQL	1865 ms
3061	Calculate Trapping Rain Water	MySQL	853 ms