Leetcode Notes
Total: 78
| Date | Question | Difficulty | Tags |
|---|---|---|---|
2025-04-14 | [ Leetcode 190 ] Reverse Bits | 解題思路分享 | Easy | Bit ManipulationDivide and Conquer |
2025-04-14 | [ Leetcode 153 ] Find Minimum in Rotated Sorted Array | 解題思路分享 | Medium | ArrayBinary Search |
2025-04-10 | [ Leetcode 139 ] Word Break | 解題思路分享 | Medium | ArrayHash TableStringDPRecursionMemorization |
2025-04-10 | [ Leetcode 152 ] Maximum Product Subarray| 解題思路分享 | Medium | ArrayDP |
2025-04-08 | [ Leetcode 128 ] Longest Consecutive Sequence | 解題思路分享 | Medium | ArrayHash Table |
2025-04-08 | [ Leetcode 124 ] Binary Tree Maximum Path Sum | 解題思路分享 | Hard | TreeDFSBinary TreeDP |
2025-04-07 | [ Leetcode 98 ] Validate Binary Search Tree | 解題思路分享 | Medium | TreeDFSBinary Search TreeBinary Tree |
2025-04-07 | [ Leetcode 100 ] Same Tree | 解題思路分享 | Easy | TreeDFSBinary Tree |
2025-04-07 | [ Leetcode 79 ] Word Search | 解題思路分享 | Medium | ArrayBacktrackingDFSMatrixString |
2025-04-07 | [ Leetcode 104 ] Maximum Depth of Binary Tree | 解題思路分享 | Easy | TreeDFSBinary Tree |
2025-04-07 | [ Leetcode 121 ] Best Time to Buy and Sell Stock | 解題思路分享 | Easy | ArrayGreedy |
2025-04-07 | [ Leetcode 91 ] Decode Ways | 解題思路分享 | Medium | StringDP |
2025-04-02 | [ Leetcode 76 ] Minimum Window Substring | 解題思路分享 | Hard | Hash TableStringSliding Window |
2025-04-01 | [ Leetcode 70 ] Climbing Stairs | 解題思路分享 | Easy | DP |
2025-04-01 | [ Leetcode 73 ] Set Matrix Zeros | 解題思路分享 | Medium | ArrayMatrixHash Table |
2025-04-01 | [ Leetcode 57 ] Insert Interval | 解題思路分享 | Medium | ArrayInterval |
2025-04-01 | [ Leetcode 62 ] Unique Paths | 解題思路分享 | Medium | MathDPCombinatorics |
2025-03-31 | [ Leetcode 56 ] Merge Intervals | 解題思路分享 | Medium | ArraySortingGreedy |
2025-03-30 | [ Leetcode 55 ] Jump Game | 解題思路分享 | Medium | ArrayGreedy |
2025-03-30 | [ Leetcode 54 ] Spiral Matrix | 解題思路分享 | Medium | ArrayMatrix |
2025-03-30 | [ Leetcode 49 ] Group Anagrams | 解題思路分享 | Medium | ArrayHash TableStringSorting |
2025-03-28 | [ Leetcode 39 ] Combination Sum | 解題思路分享 | Medium | ArrayBacktracking |
2025-03-28 | [ Leetcode 48 ] Rotate Image | 解題思路分享 | Medium | ArrayMathMatrix |
2025-03-27 | [ Leetcode 15 ] 3Sum | 解題思路分享 | Medium | ArrayTwo PointersSorting |
2025-03-27 | [ Leetcode 23 ] Merge k Sorted Lists | 解題思路分享 | Hard | Linked ListPriority QueueMerge Sort |
2025-03-26 | [ Leetcode 1 ] Two Sum | 解題思路分享 | Easy | ArrayHash Table |
2025-03-26 | [ Leetcode 516 ] Longest Palindromic Subsequence | 解題思路分享 | Medium | StringDP |
2025-03-25 | [ Leetcode 279 ] Perfect Squares | 解題思路分享 | Medium | DPMath |
2025-03-24 | [ Leetcode 347 ] Top K Frequent Elements | 解題思路分享 | Medium | ArrayHash TableQueuePriority QueuePartial Sorting |
2025-03-24 | [ Leetcode 239 ] Sliding Window Maximum | 解題思路分享 | Hard | ArrayQueuePriority QueueSliding WindowDeque+1 更多 |
2025-03-24 | [ Leetcode 650 ] 2 Keys Keyboard | 解題思路分享 | Medium | MathDP |
2025-03-24 | [ Leetcode 416 ] Partition Equal Subset Sum | 解題思路分享 | Medium | ArrayDP0/1 Knapsack Problem |
2025-03-23 | [ Leetcode 64 ] Minimum Path Sum | 解題思路分享 | Medium | ArrayDPMatrix |
2025-03-23 | [ Leetcode 221 ] Maximal Square | 解題思路分享 | Medium | ArrayDPMatrix |
2025-03-23 | [ Leetcode 343 ] Integer Break | 解題思路分享 | Medium | DPMath |
2025-03-23 | [ Leetcode 72 ] Edit Distance | 解題思路分享 | Medium | StringDP |
2025-03-22 | [ Leetcode 51 ] N-Queens | 解題思路分享 | Hard | ArrayBacktrackingBit Manipulation |
2025-03-22 | [ Leetcode 455 ] Assign Cookies | 解題思路分享 | Easy | ArrayGreedyTwo PointersSorting |
2025-03-22 | [ Leetcode 78 ] Subsets | 解題思路分享 | Medium | ArrayBacktrackingBit Manipulation |
2025-03-21 | [ Leetcode 450 ] Delete Node in a BST | 解題思路分享 | Medium | TreeBinary TreeBinary Search Tree |
2025-03-21 | [ Leetcode 106 ] Construct Binary Tree from Inorder and Postorder Traversal | 解題思路分享 | Medium | ArrayHash TableDivide and ConquerTreeBinary Tree |
2025-03-21 | [ Leetcode 889 ] Construct Binary Tree from Preorder and Postorder Traversal | 解題思路分享 | Medium | ArrayHash TableDivide and ConquerTreeBinary Tree |
2025-03-21 | [ Leetcode 105 ] Construct Binary Tree from Preorder and Inorder Traversal | 解題思路分享 | Medium | ArrayHash TableDivide and ConquerTreeBinary Tree |
2025-03-21 | [ Leetcode 700 ] Search in a Binary Search Tree | 解題思路分享 | Easy | TreeBinary TreeBinary Search Tree |
2025-03-21 | [ Leetcode 701 ] Insert into a Binary Search Tree | 解題思路分享 | Medium | TreeBinary TreeBinary Search Tree |
2025-03-20 | [ Leetcode 102 ] Binary Tree Level Order Traversal | 解題思路分享 | Medium | BFSTreeBinary Tree |
2025-03-20 | [ Leetcode 145 ] Binary Tree Postorder Traversal | 解題思路分享 | Easy | DFSTreeBinary Tree |
2025-03-20 | [ Leetcode 144 ] Binary Tree Preorder Traversal | 解題思路分享 | Easy | DFSTreeBinary Tree |
2025-03-20 | [ Leetcode 94 ] Binary Tree Inorder Traversal | 解題思路分享 | Easy | DFSTreeBinary Tree |
2025-03-10 | [ Leetcode 217 ] Contains Duplicate | 解題思路分享 | Easy | ArrayHash Table |
2025-03-10 | [ Leetcode 36 ] Valid Sudoku | 解題思路分享 | Medium | ArrayHash TableMatrix |
2025-03-10 | [ Leetcode 219 ] Contains Duplicate II | 解題思路分享 | Easy | ArrayHash TableSliding Window |
2025-03-08 | [ Leetcode 200 ] Number of Islands | 解題思路分享 | Medium | ArrayMatrixDFSBFSUnion Find |
2025-03-08 | [ Leetcode 133 ] Clone Graph | 解題思路分享 | Medium | DFSBFSGraphHash Table |
2025-03-08 | [ Leetcode 210 ] Course Schedule II | 解題思路分享 | Medium | BFSDFSGraphTopological Sort |
2025-03-08 | [ Leetcode 209 ] Minimum Size Subarray Sum | 解題思路分享 | Medium | ArraySliding WindowBinary SearchPrefix Sum |
2025-03-06 | [ Leetcode 20 ] Valid Parentheses | 解題思路分享 | Easy | StringStack |
2025-03-06 | [ Leetcode 496 ] Next Greater Element I | 解題思路分享 | Easy | ArrayHash TableStackMonotonic Stack |
2025-03-06 | [ Leetcode 21 ] Merge Two Sorted Lists | 解題思路分享 | Easy | Linked ListTwo Pointers |
2025-03-06 | [ Leetcode 739 ] Daily Temperatures | 解題思路分享 | Medium | ArrayStackMonotonic Stack |
2025-03-06 | [ Leetcode 227 ] Basic Calculator II | 解題思路分享 | Medium | StringStackMath |
2025-03-05 | [ Leetcode 713 ] Subarray Product Less Than K | 解題思路分享 | Medium | ArraySliding Window |
2025-03-03 | [ Leetcode 141 ] Linked List Cycle | 解題思路分享 | Easy | Linked ListTwo Pointers |
2025-03-03 | [ Leetcode 1343 ] Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold | 解題思路分享 | Medium | ArraySliding Window |
2025-03-03 | [ Leetcode 3 ] Longest Substring Without Repeating Characters | 解題思路分享 | Medium | StringSliding WindowHash Table |
2025-03-03 | [ Leetcode 19 ] Remove Nth Node From End of List | 解題思路分享 | Medium | Linked ListTwo Pointers |
2025-03-03 | [ Leetcode 876 ] Middle of the Linked List | 解題思路分享 | Easy | Linked ListTwo Pointers |
2025-03-01 | [ Leetcode 718 ] Maximum Length of Repeated Subarray | 解題思路分享 | Medium | ArrayDP |
2025-03-01 | [ Leetcode 1143 ] Longest Common Subsequence | 解題思路分享 | Medium | StringDP |
2025-03-01 | [ Leetcode 53 ] Maximum Subarray | 解題思路分享 | Medium | ArrayDPDivide and Conquer |
2025-02-27 | [ Leetcode 11 ] Container With Most Water | 解題思路分享 | Medium | ArrayTwo PointersGreedy |
2025-02-26 | [ Leetcode 167 ] Two Sum II - Input Array Is Sorted | 解題思路分享 | Medium | ArrayTwo Pointers |
2025-02-26 | [ Leetcode 26 ] Remove Duplicates from Sorted Array | 解題思路分享 | Easy | ArrayTwo Pointers |
2025-02-23 | [ Leetcode 349 ] Intersection of Two Arrays | 解題思路分享 | Easy | ArrayHash Table |
2025-02-23 | [ Leetcode 873 ] Length of Longest Fibonacci Subsequence | 解題思路分享 | Medium | ArrayDPHash Table |
2025-02-15 | [ Leetcode 125 ] Valid Palindrome | 解題思路分享 | Easy | Two PointersString |
2025-01-29 | [ Leetcode 841 ] Keys and Rooms | 解題思路分享 | Medium | GraphDFSBFS |
2025-01-29 | [ Leetcode 300 ] Longest Increasing Subsequence | 解題思路分享 | Medium | DPArrayBinary SearchGreedy |