| 1 |
Two Sum |
双指针 |
| 2 |
Add Two Numbers |
模拟，链表 |
| 3 |
Longest Substring Without Repeating Characters |
模拟，字符串 |
| 4 |
Median of Two Sorted Arrays |
二分 |
| 5 |
Longest Palindromic Substring |
动态规划 |
| 6 |
ZigZag Conversion |
模拟，找规律 |
| 7 |
Reverse Integer |
模拟 |
| 8 |
String to Integer (atoi) |
字符串 |
| 9 |
Palindrome Number |
模拟 |
| 10 |
Regular Expression Matching |
搜索，动态规划 |
| 11 |
Container With Most Water |
双指针，贪心 |
| 12 |
Integer to Roman |
模拟 |
| 13 |
Roman to Integer |
模拟 |
| 14 |
Longest Common Prefix |
模拟，字符串 |
| 15 |
3Sum |
模拟 |
| 16 |
3Sum Closest |
双指针 |
| 17 |
Letter Combinations of a Phone Number |
搜索 |
| 18 |
4Sum |
双指针，搜索 |
| 19 |
Remove Nth Node From End of List |
双指针 |
| 20 |
Valid Parentheses |
栈 |
| 21 |
Merge Two Sorted Lists |
链表 |
| 22 |
Generate Parentheses |
搜索 |
| 23 |
Merge k Sorted Lists |
链表，堆 |
| 24 |
Swap Nodes in Pairs |
链表，递归 |
| 25 |
Reverse Nodes in k-Group |
链表 |
| 26 |
Remove Duplicates from Sorted Array |
双指针 |
| 27 |
Remove Element |
双指针 |
| 28 |
Implement strStr() |
KMP |
| 29 |
Divide Two Integers |
递归 |
| 30 |
Substring with Concatenation of All Words |
字符串 |
| 31 |
Next Permutation |
找规律 |
| 32 |
Longest Valid Parentheses |
双指针，动态规划，栈 |
| 33 |
Search in Rotated Sorted Array |
二分 |
| 34 |
Find First and Last Position of Element in Sorted Array |
二分 |
| 35 |
Search Insert Position |
二分 |
| 36 |
Valid Sudoku |
模拟 |
| 37 |
Sudoku Solver |
递归 |
| 38 |
Count and Say |
模拟，字符串 |
| 39 |
Combination Sum |
动态规划，递归 |
| 40 |
Combination Sum II |
递归 |
| 41 |
First Missing Positive |
模拟 |
| 42 |
Trapping Rain Water |
双指针，动态规划，栈 |
| 43 |
Multiply Strings |
字符串 |
| 44 |
Wildcard Matching |
动态规划，递归 |
| 45 |
Jump Game II |
贪心 |
| 46 |
Permutations |
递归 |
| 47 |
Permutations II |
递归 |
| 48 |
Rotate Image |
模拟 |
| 49 |
Group Anagrams |
模拟 |
| 50 |
Pow(x, n) |
快速幂 |
| 51 |
N-Queens |
递归 |
| 52 |
N-Queens II |
递归 |
| 53 |
Maximum Subarray |
动态规划 |
| 54 |
Spiral Matrix |
模拟 |
| 55 |
Jump Game |
贪心 |
| 56 |
Merge Intervals |
模拟 |
| 57 |
Insert Interval |
模拟 |
| 58 |
Length of Last Word |
模拟 |
| 59 |
Spiral Matrix II |
模拟 |
| 60 |
Permutation Sequence |
模拟 |
| 61 |
Rotate List |
链表 |
| 62 |
Unique Paths |
动态规划 |
| 63 |
Unique Paths II |
动态规划 |
| 64 |
Minimum Path Sum |
动态规划 |
| 65 |
Valid Number |
模拟 |
| 66 |
Plus One |
模拟 |
| 67 |
Add Binary |
模拟 |
| 68 |
Text Justification |
模拟 |
| 69 |
Sqrt(x) |
二分 |
| 70 |
Climbing Stairs |
动态规划 |
| 71 |
Simplify Path |
栈 |
| 72 |
Edit Distance |
动态规划 |
| 73 |
Set Matrix Zeroes |
模拟 |
| 74 |
Search a 2D Matrix |
模拟 |
| 75 |
Sort Colors |
多指针 |
| 76 |
Minimum Window Substring |
字符串 |
| 77 |
Combinations |
搜索 |
| 78 |
Subsets |
搜索 |
| 79 |
Word Search |
搜索 |
| 80 |
Remove Duplicates from Sorted Array II |
双指针 |
| 81 |
Search in Rotated Sorted Array II |
二分 |
| 82 |
Remove Duplicates from Sorted List II |
链表 |
| 83 |
Remove Duplicates from Sorted List |
链表 |
| 84 |
Largest Rectangle in Histogram |
动态规划 |
| 85 |
Maximal Rectangle |
动态规划 |
| 86 |
Partition List |
链表 |
| 87 |
Scramble String |
搜索，记忆化搜索，动态规划 |
| 88 |
Merge Sorted Array |
模拟 |
| 89 |
Gray Code |
模拟 |
| 90 |
Subsets II |
搜索 |
| 91 |
Decode Ways |
搜索，动态规划 |
| 92 |
Reverse Linked List II |
链表 |
| 93 |
Restore IP Addresses |
模拟 |
| 94 |
Binary Tree Inorder Traversal |
中序遍历 |
| 95 |
Unique Binary Search Trees II |
二叉搜索树，递归 |
| 96 |
Unique Binary Search Trees |
二叉搜索树，动态规划 |
| 97 |
Interleaving String |
搜索，动态规划 |
| 98 |
Validate Binary Search Tree |
二叉搜索树 |
| 99 |
Recover Binary Search Tree |
二叉搜索树 |
| 100 |
Same Tree |
递归 |