This table is generated by python scripts.
| # | Title | Solution | Difficulty |
|---|---|---|---|
| 1 | Two Sum | Python3 | |
| 2 | Add Two Numbers | Python3 | |
| 5 | Longest Palindromic Substring | Python3 | |
| 10 | Regular Expression Matching | Python3 | |
| 11 | Container With Most Water | Python3 | |
| 15 | 3Sum | Python3 | |
| 17 | Letter Combinations of a Phone Number | Python3 | |
| 20 | Valid Parentheses | Python3 | |
| 22 | Generate Parentheses | Python3 | |
| 23 | Merge k Sorted Lists | Python3 | |
| 24 | Swap Nodes in Pairs | Python3 | |
| 31 | Next Permutation | Python3 | |
| 32 | Longest Valid Parentheses | Python3 | |
| 33 | Search in Rotated Sorted Array | Python3 | |
| 34 | Find First and Last Position of Element in Sorted Array | Python3 | |
| 39 | Combination Sum | Python3 | |
| 40 | Combination Sum II | Python3 | |
| 42 | Trapping Rain Water | Python3 | |
| 44 | Wildcard Matching | Python3 | |
| 46 | Permutations | Python3 | |
| 47 | Permutations II | Python3 | |
| 50 | Pow(x, n) | Python3 | |
| 51 | N-Queens | Python3 | |
| 56 | Merge Intervals | Python3 | |
| 57 | Insert Interval | Python3 | |
| 71 | Simplify Path | Python3 | |
| 75 | Sort Colors | Python3 | |
| 78 | Subsets | Python3 | |
| 79 | Word Search | Python3 | |
| 84 | Largest Rectangle in Histogram | Python3 | |
| 86 | Partition List | Python3 | |
| 90 | Subsets II | Python3 | |
| 93 | Restore IP Addresses | Python3 | |
| 94 | Binary Tree Inorder Traversal | Python3 | |
| 98 | Validate Binary Search Tree | Python3 | |
| 100 | Same Tree | Python3 | |
| 101 | Symmetric Tree | Python3 | |
| 102 | Binary Tree Level Order Traversal | Python3 | |
| 104 | Maximum Depth of Binary Tree | Python3 | |
| 109 | Convert Sorted List to Binary Search Tree | Python3 | |
| 110 | Balanced Binary Tree | Python3 | |
| 111 | Minimum Depth of Binary Tree | Python3 | |
| 112 | Path Sum | Python3 | |
| 113 | Path Sum II | Python3 | |
| 114 | Flatten Binary Tree to Linked List | Python3 | |
| 116 | Populating Next Right Pointers in Each Node | Python3 | |
| 120 | Triangle | Python3 | |
| 121 | Best Time to Buy and Sell Stock | Python3 | |
| 122 | Best Time to Buy and Sell Stock II | Python3 | |
| 123 | Best Time to Buy and Sell Stock III | Python3 | |
| 124 | Binary Tree Maximum Path Sum | Python3 | |
| 125 | Valid Palindrome | Python3 | |
| 126 | Word Ladder II | Python3 | |
| 129 | Sum Root to Leaf Numbers | Python3 | |
| 133 | Clone Graph | Python3 | |
| 139 | Word Break | Python3 | |
| 140 | Word Break II | Python3 | |
| 144 | Binary Tree Preorder Traversal | Python3 | |
| 145 | Binary Tree Postorder Traversal | Python3 | |
| 146 | LRU Cache | Python3 | |
| 150 | Evaluate Reverse Polish Notation | Python3 | |
| 153 | Find Minimum in Rotated Sorted Array | Python3 | |
| 154 | Find Minimum in Rotated Sorted Array II | Python3 | |
| 155 | Min Stack | Python3 | |
| 162 | Find Peak Element | Python3 | |
| 173 | Binary Search Tree Iterator | Python3 | |
| 188 | Best Time to Buy and Sell Stock IV | Python3 | |
| 207 | Course Schedule | Python3 | |
| 210 | Course Schedule II | Python3 | |
| 215 | Kth Largest Element in an Array | Python3 | |
| 216 | Combination Sum III | Python3 | |
| 225 | Implement Stack using Queues | Python3 | |
| 230 | Kth Smallest Element in a BST | Python3 | |
| 232 | Implement Queue using Stacks | Python3 | |
| 235 | Lowest Common Ancestor of a Binary Search Tree | Python3 | |
| 236 | Lowest Common Ancestor of a Binary Tree | Python3 | |
| 242 | Valid Anagram | Python3 | |
| 252 | Meeting Rooms | Python3 | |
| 253 | Meeting Rooms II | Python3 | |
| 257 | Binary Tree Paths | Python3 | |
| 263 | Ugly Number | Python3 | |
| 264 | Ugly Number II | Python3 | |
| 269 | Alien Dictionary | Python3 | |
| 270 | Closest Binary Search Tree Value | Python3 | |
| 272 | Closest Binary Search Tree Value II | Python3 | |
| 278 | First Bad Version | Python3 | |
| 283 | Move Zeroes | Python3 | |
| 285 | Inorder Successor in BST | Python3 | |
| 290 | Word Pattern | Python3 | |
| 298 | Binary Tree Longest Consecutive Sequence | Python3 | |
| 301 | Remove Invalid Parentheses | Python3 | |
| 302 | Smallest Rectangle Enclosing Black Pixels | Python3 | |
| 309 | Best Time to Buy and Sell Stock with Cooldown | Python3 | |
| 313 | Super Ugly Number | Python3 | |
| 317 | Shortest Distance from All Buildings | Python3 | |
| 322 | Coin Change | Python3 | |
| 332 | Reconstruct Itinerary | Python3 | |
| 333 | Largest BST Subtree | Python3 | |
| 334 | Increasing Triplet Subsequence | Python3 | |
| 341 | Flatten Nested List Iterator | Python3 | |
| 347 | Top K Frequent Elements | Python3 | |
| 353 | Design Snake Game | Python3 | |
| 380 | Insert Delete GetRandom O(1) | Python3 | |
| 387 | First Unique Character in a String | Python3 | |
| 394 | Decode String | Python3 | |
| 416 | Partition Equal Subset Sum | Python3 | |
| 417 | Pacific Atlantic Water Flow | Python3 | |
| 429 | N-ary Tree Level Order Traversal | Python3 | |
| 430 | Flatten a Multilevel Doubly Linked List | Python3 | |
| 437 | Path Sum III | Python3 | |
| 444 | Sequence Reconstruction | Python3 | |
| 445 | Add Two Numbers II | Python3 | |
| 451 | Sort Characters By Frequency | Python3 | |
| 474 | Ones and Zeroes | Python3 | |
| 486 | Predict the Winner | Python3 | |
| 490 | The Maze | Python3 | |
| 494 | Target Sum | Python3 | |
| 496 | Next Greater Element I | Python3 | |
| 498 | Diagonal Traverse | Python3 | |
| 503 | Next Greater Element II | Python3 | |
| 505 | The Maze II | Python3 | |
| 518 | Coin Change 2 | Python3 | |
| 525 | Contiguous Array | Python3 | |
| 549 | Binary Tree Longest Consecutive Sequence II | Python3 | |
| 556 | Next Greater Element III | Python3 | |
| 567 | Permutation in String | Python3 | |
| 572 | Subtree of Another Tree | Python3 | |
| 582 | Kill Process | Python3 | |
| 589 | N-ary Tree Preorder Traversal | Python3 | |
| 590 | N-ary Tree Postorder Traversal | Python3 | |
| 621 | Task Scheduler | Python3 | |
| 622 | Design Circular Queue | Python3 | |
| 641 | Design Circular Deque | Python3 | |
| 658 | Find K Closest Elements | Python3 | |
| 669 | Trim a Binary Search Tree | Python3 | |
| 687 | Longest Univalue Path | Python3 | |
| 702 | Search in a Sorted Array of Unknown Size | Python3 | |
| 703 | Kth Largest Element in a Stream | Python3 | |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | Python3 | |
| 735 | Asteroid Collision | Python3 | |
| 739 | Daily Temperatures | Python3 | |
| 743 | Network Delay Time | Python3 | |
| 759 | Employee Free Time | Python3 | |
| 785 | Is Graph Bipartite? | Python3 | |
| 787 | Cheapest Flights Within K Stops | Python3 | |
| 814 | Binary Tree Pruning | Python3 | |
| 841 | Keys and Rooms | Python3 | |
| 852 | Peak Index in a Mountain Array | Python3 | |
| 872 | Leaf-Similar Trees | Python3 | |
| 876 | Middle of the Linked List | Python3 | |
| 877 | Stone Game | Python3 | |
| 901 | Online Stock Span | Python3 | |
| 915 | Partition Array into Disjoint Intervals | Python3 | |
| 965 | Univalued Binary Tree | Python3 | |
| 973 | K Closest Points to Origin | Python3 | |
| 986 | Interval List Intersections | Python3 | |
| 1013 | Partition Array Into Three Parts With Equal Sum | Python3 | |
| 1024 | Video Stitching | Python3 | |
| 1029 | Two City Scheduling | Python3 | |
| 1043 | Partition Array for Maximum Sum | Python3 | |
| 1053 | Previous Permutation With One Swap | Python3 | |
| 1123 | Lowest Common Ancestor of Deepest Leaves | Python3 | |
| 1169 | Invalid Transactions | Python3 | |
| 1190 | Reverse Substrings Between Each Pair of Parentheses | Python3 | |
| 1209 | Remove All Adjacent Duplicates in String II | Python3 | |
| 1274 | Number of Ships in a Rectangle | Python3 | |
| 1302 | Deepest Leaves Sum | Python3 | |
| 1325 | Delete Leaves With a Given Value | Python3 | |
| 1329 | Sort the Matrix Diagonally | Python3 | |
| 1396 | Design Underground System | Python3 | |
| 1462 | Course Schedule IV | Python3 |
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