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链表
| 题号 | 题目 | 难度 |
|---|---|---|
| 2 | Add Two Numbers | ☆ |
| 206 | Reverse Linked List | ☆ |
| 92 | Reverse Linked List II | ☆☆☆ |
| 86 | Partition List | ☆☆ |
| 83 | Remove Duplicates from Sorted List | ☆☆ |
| 82 | Remove Duplicates from Sorted List II | ☆☆☆ |
| 61 | Rotate List | ☆☆☆ |
| 19 | Remove Nth Node From End of List | ☆☆ |
| 24 | Swap Nodes in Pairs | ☆☆ |
| 138 | Copy List with Random Pointer | ☆☆☆ |
| 141 | Linked List Cycle | ☆☆ |
| 142 | Linked List Cycle II | ☆☆ |
| 143 | Reorder List | ☆☆☆ |
| 148 | Sort List （链表排序） | ☆☆ |
| 147 | Insertion Sort List (链表排序) | ☆☆☆ |
树
二叉树的遍历
二叉树的构建
| 题号 | 题目 | 难度 |
|---|---|---|
| 297 | Serialize and Deserialize Binary Tree(序列化和去序列化) | |
| 105 | Construct Binary Tree from Preorder and Inorder Traversal | ☆☆☆ |
| 106 | Construct Binary Tree from Inorder and Postorder Traversal | ☆☆☆ |
二叉查找树
| 题号 | 题目 | 难度 |
|---|---|---|
| 235 | Lowest Common Ancestor of a Binary Search Tree | ☆ |
二叉树的递归
| 题号 | 题目 | 难度 |
|---|---|---|
| 129 | Sum Root to Leaf Numbers | ☆ |
| 104 | Maximum Depth of Binary Tree | ☆ |
| 226 | Invert Binary Tree | ☆ |
| 112 | Path Sum | ☆ |
| 113 | Path Sum II | ☆☆ |
| 437 | Path Sum III | ☆☆☆☆ |
| 257 | Binary Tree Paths | ☆☆☆ |
动态规划
| 题号 | 题目 | 难度 |
|---|---|---|
| 120 | Triangle | ☆☆ |
| 70 | Climbing Stairs | ☆ |
| 343 | Integer Break | ☆☆ |
| 198 | House Robber | ☆ |
| 64 | Minimum Path Sum | ☆ |
| 62 | Unique Paths | ☆ |
| 63 | Unique Paths II | ☆☆☆ |
| 96 | Unique Binary Search Trees | ☆ |
分治法
| 题号 | 题目 | 难度 |
|---|---|---|
| 50、69 | Pow(x, n) 、Sqrt(x) | ☆ |
数组
| 题号 | 题目 | 难度 |
|---|---|---|
| 136 | Single number | ☆ |
| 137 | Single number II | ☆ |
| 260 | Single Number III | ☆ |
| 575 | Distribute Candies | ☆ |
| 1 | Two Sum | ☆ |
| 67 | Add Binary | ☆ |
| 836 | Rectangle Overlap | ☆ |
| 88 | Merge Sorted Array | ☆ |
| 7 | Reverse Integer | ☆ |
| 9 | Palindrome Number | ☆ |
| 146 | LRU Cache | ☆☆☆☆ |
| 66 | Plus One | ☆ |
二分查找
| 题号 | 题目 | 难度 |
|---|---|---|
| 34 | Find First and Last Position of Element in Sorted Array | ☆ |
| 35 | Search Insert Position | ☆ |
| 74 | Search a 2D Matrix | ☆ |
字符串
| 题号 | 题目 | 难度 |
|---|---|---|
| 125 | Valid Palindrome | ☆☆ |
| 28 | Implement strStr() | ☆ |
| 8 | String to Integer (atoi) | ☆☆☆ |
| 5 | Longest Palindromic Substring(最长回文串) | |
| 43 | Multiply Strings | |
| 14 | Longest Common Prefix | |
| 65 | Valid Number | |
| 12、13 | Integer to Roman / Roman to Integer | |
| 20 | Valid Parentheses | ☆☆ |