Complete solutions to Leetcode problems, updated daily.
| # | Title | Tags |
|---|---|---|
| 001 | Two Sum | Array, Hash Table |
| 007 | Reverse Integer | Math |
| 009 | Palindrome Number | Math |
| 013 | Roman to Integer | Math, String |
| 014 | Longest Common Prefix | String |
| 020 | Valid Parentheses | String, Stack |
| 021 | Merge Two Sorted Lists | Linked List |
| 053 | Maximum Subarray | Array, Divide and Conquer, Dynamic Programming |
| 070 | Climbing Stairs | Dynamic Programming |
| 083 | Remove Duplicates from Sorted List | Linked List |
| 136 | Single Number | Hash Table, Bit Manipulation |
| 189 | Rotate Array | Array |
| 198 | House Robber | Dynamic Programming |
| 203 | Remove Linked List Elements | Linked List |
| 231 | Power of Two | Math, Bit Manipulation |
| 235 | Lowest Common Ancestor of a Binary Search Tree | Tree |
| 237 | Delete Node in a Linked List | Linked List |
| 344 | Reverse String | Two Pointers, String |
| 703 | Kth Largest Element in a Stream | Heap |
| 876 | Middle of the Linked List | Linked List |
| # | Title | Tags |
|---|---|---|
| 002 | Add Two Numbers | Linked List, Math |
| 015 | 3Sum | Array, Two Pointers |
| 019 | Remove Nth Node From End of List | Linked List, Two Pointers |
| 024 | Swap Nodes in Pairs | Linked List |
| 031 | Next Permutation | Array |
| 046 | Permutations | Backtracking |
| 047 | Permutations II | Backtracking |
| 062 | Unique Paths | Array, Dynamic Programming |
| 063 | Unique Paths II | Array, Dynamic Programming |
| 075 | Sort Colors | Array, Two Pointers, Sort |
| 082 | Remove Duplicates from Sorted List II | Linked List |
| 086 | Partition List | Linked List, Two Pointers |
| 092 | Reverse Linked List II | Linked List |
| 094 | Binary Tree Inorder Traversal | Hash Table, Stack, Tree |
| 102 | Binary Tree Level Order Traversal | Tree, Breadth-first Search |
| 127 | Word Ladder | Breadth-first Search |
| 130 | Surrounded Regions | Depth-first Search, Breadth-first Search, Union Find |
| 137 | Single Number II | Bit Manipulation |
| 144 | Binary Tree Preorder Traversal | Stack, Tree |
| 150 | Evaluate Reverse Polish Notation | Stack |
| 153 | Find Minimum in Rotated Sorted Array | Array, Binary Search |
| # | Title | Tags |
|---|---|---|
| 023 | Merge k Sorted Lists | Linked List, Divide and Conquer, Heap |
| 032 | Longest Valid Parentheses | String, Dynamic Programming |
| 084 | Largest Rectangle in Histogram | Array, Stack |
| 145 | Binary Tree Postorder Traversal | Stack, Tree |
| 295 | Find Median from Data Stream | Heap, Design |
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