Question TitleAcceptanceQuestion Level
128. Longest Consecutive Sequence0.47Med.
1. Two Sum0.569Easy
3. Longest Substring Without Repeating Characters0.382Med.
5. Longest Palindromic Substring0.371Med.
133. Clone Graph0.644Med.
261. Graph Valid Tree0.498Med.
647. Palindromic Substrings0.724Med.
11. Container With Most Water0.593Med.
139. Word Break0.49Med.
141. Linked List Cycle0.537Easy
268. Missing Number0.714Easy
15. 3Sum0.383Med.
143. Reorder List0.643Med.
269. Alien Dictionary0.37Hard
271. Encode and Decode Strings0.51Med.
19. Remove Nth Node From End of List0.507Med.
20. Valid Parentheses0.435Easy
21. Merge Two Sorted Lists0.678Easy
23. Merge k Sorted Lists0.586Hard
152. Maximum Product Subarray0.358Med.
153. Find Minimum in Rotated Sorted Array0.536Med.
33. Search in Rotated Sorted Array0.439Med.
417. Pacific Atlantic Water Flow0.604Med.
39. Combination Sum0.759Med.
295. Find Median from Data Stream0.54Hard
297. Serialize and Deserialize Binary Tree0.602Hard
424. Longest Repeating Character Replacement0.588Med.
300. Longest Increasing Subsequence0.589Med.
48. Rotate Image0.791Med.
49. Group Anagrams0.72Med.
435. Non-overlapping Intervals0.565Med.
53. Maximum Subarray0.528Med.
54. Spiral Matrix0.558Med.
55. Jump Game0.403Med.
56. Merge Intervals0.509Med.
57. Insert Interval0.446Med.
572. Subtree of Another Tree0.511Easy
62. Unique Paths0.665Med.
190. Reverse Bits0.656Easy
191. Number of 1 Bits0.761Easy
322. Coin Change0.478Med.
323. Number of Connected Components in an Undirected Graph0.647Med.
70. Climbing Stairs0.539Easy
198. House Robber0.528Med.
200. Number of Islands0.636Med.
73. Set Matrix Zeroes0.622Med.
76. Minimum Window Substring0.467Hard
206. Reverse Linked List0.801Easy
79. Word Search0.466Med.
207. Course Schedule0.506Med.
208. Implement Trie (Prefix Tree)0.69Med.
338. Counting Bits0.803Easy
211. Design Add and Search Words Data Structure0.48Med.
212. Word Search II0.38Hard
213. House Robber II0.445Med.
217. Contains Duplicate0.64Easy
91. Decode Ways0.375Med.
347. Top K Frequent Elements0.656Med.
253. Meeting Rooms II0.525Med.
98. Validate Binary Search Tree0.352Med.
226. Invert Binary Tree0.797Easy
100. Same Tree0.664Easy
1143. Longest Common Subsequence0.588Med.
102. Binary Tree Level Order Traversal0.72Med.
230. Kth Smallest Element in a BST0.763Med.
104. Maximum Depth of Binary Tree0.778Easy
105. Construct Binary Tree from Preorder and Inorder Traversal0.682Med.
235. Lowest Common Ancestor of a Binary Search Tree0.698Med.
238. Product of Array Except Self0.685Med.
242. Valid Anagram0.676Easy
371. Sum of Two Integers0.548Med.
252. Meeting Rooms0.593Easy
121. Best Time to Buy and Sell Stock0.562Easy
124. Binary Tree Maximum Path Sum0.419Hard
125. Valid Palindrome0.525Easy