https://github.com/liuyubobobo/Play-Leetcode
My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言，一部分问题支持Java语言。近乎所有问题都会提供多个算法解决。大家加油！：）
https://github.com/liuyubobobo/Play-Leetcode
algorithm-challenges algorithm-competitions algorithms interview-questions leetcode-cpp leetcode-solutions
Last synced: about 1 year ago
JSON representation
My Solutions to Leetcode problems. All solutions support C++ language, some support Java and Python. Multiple solutions will be given by most problems. Enjoy:) 我的Leetcode解答。所有的问题都支持C++语言，一部分问题支持Java语言。近乎所有问题都会提供多个算法解决。大家加油！：）
- Host: GitHub
- URL: https://github.com/liuyubobobo/Play-Leetcode
- Owner: liuyubobobo
- Created: 2016-12-01T17:08:20.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2023-11-09T09:31:35.000Z (over 2 years ago)
- Last Synced: 2025-03-23T15:43:33.112Z (about 1 year ago)
- Topics: algorithm-challenges, algorithm-competitions, algorithms, interview-questions, leetcode-cpp, leetcode-solutions
- Language: C++
- Homepage:
- Size: 5.58 MB
- Stars: 2,725
- Watchers: 119
- Forks: 721
- Open Issues: 1
-
Metadata Files:
- Readme: readme.md
Awesome Lists containing this project
- Awesome-AI-algorithm - Github
README
## My solutions to Leetcode
I will put my solutions to [Leetcode Problems](https://leetcode.com/problemset/all/) in this repo. Every problem will be solved in C++; part of the problems will be solved in Java also. I will try my best to support more language in the future :)
Please feel free to contact me if you have any questions with this repo:)
email: [liuyubobobo@gmail.com](mailto:liuyubobobo@gmail.com)
---
大家好，欢迎大家来到我的 **Leetcode 算法题解**代码仓。在这个代码仓中，近乎每一个问题都会使用多种方式进行解决，同时标注了简明的算法思想，时间复杂度和空间复杂度。所有问题都会使用C++进行解决，各别问题支持Java语言和Python语言。
如果对代码仓有任何问题，欢迎联系我：）
**电子邮件**：[liuyubobobo@gmail.com](mailto:liuyubobobo@gmail.com)
**知乎**: [刘宇波 http://www.zhihu.com/people/liuyubobobo](http://www.zhihu.com/people/liuyubobobo)
**知乎专栏：**[是不是很酷 https://zhuanlan.zhihu.com/liuyubobobo](https://zhuanlan.zhihu.com/liuyubobobo)
**个人公众号：是不是很酷**：）
**知识星球（免费）**
## 其他相关代码仓
* [**《算法与数据结构》课程**](https://coding.imooc.com/class/71.html), 代码仓: [Play-with-Algorithms](https://github.com/liuyubobobo/Play-with-Algorithms)
* [**《玩转算法面试》课程**](https://coding.imooc.com/class/82.html), 代码仓: [Play-with-Algorithm-Interview](https://github.com/liuyubobobo/Play-with-Algorithm-Interview)
* [**《看得见的算法》课程**](https://coding.imooc.com/class/138.html), 代码仓: [Play-with-Algorithm-Visualization](https://github.com/liuyubobobo/Play-with-Algorithm-Visualization)
* [**《玩转数据结构》课程**](https://coding.imooc.com/class/207.html), 代码仓: [Play-with-Data-Structures](https://github.com/liuyubobobo/Play-with-Data-Structures)
* [**《玩转图论算法》课程**](https://coding.imooc.com/class/370.html), 代码仓: [Play-with-Graph-Algorithms](https://github.com/liuyubobobo/Play-with-Graph-Algorithms)
* **LeetCode Database 题解代码仓**：[Play Leetcode Database](https://github.com/liuyubobobo/Play-Leetcode-Database/)
## Problems
| ID | Problem | Official
Solution | C++ | Java | Python |
| --- | --- | :---: | :---: | :---: | :---: |
| 001 | [Two Sum](https://leetcode.com/problems/two-sum/description/) | [solution](https://leetcode.com/problems/two-sum/solution/) | [C++](0001-0500/0001-Two-Sum/cpp-0001/) | [Java](0001-0500/0001-Two-Sum/java-0001/src/) | |
| 002 | [Add Two Numbers](https://leetcode.com/problems/add-two-numbers/description/) | [solution](https://leetcode.com/problems/add-two-numbers/solution/) | [C++](0001-0500/0002-Add-Two-Numbers/cpp-0002/) | | |
| 003 | [Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters/description/) | [solution](https://leetcode.com/problems/longest-substring-without-repeating-characters/solution/) | [C++](0001-0500/0003-Longest-Substring-Without-Repeating-Characters/cpp-0003/) | [Java](0001-0500/0003-Longest-Substring-Without-Repeating-Characters/java-0003/src/) | |
| 004 | [Median of Two Sorted Arrays](https://leetcode.com/problems/median-of-two-sorted-arrays/) | [solution](https://leetcode.com/problems/median-of-two-sorted-arrays/solution/) | [C++](0001-0500/0004-Median-of-Two-Sorted-Arrays/cpp-0004/) | [Java](0001-0500/0004-Median-of-Two-Sorted-Arrays/java-0004/) | |
| 005 | [Longest Palindromic Substring](https://leetcode.com/problems/longest-palindromic-substring/) | [solution](https://leetcode.com/problems/longest-palindromic-substring/solution/) | [C++](0001-0500/0005-Longest-Palindromic-Substring/cpp-0005/) | | |
| 006 | [Zigzag Conversion](https://leetcode.com/problems/zigzag-conversion/) | [solution](https://leetcode.com/problems/zigzag-conversion/solution/) | [C++](0001-0500/0006-Zigzag-Conversion/cpp-006/) | | |
| 007 | [Reverse Integer](https://leetcode.com/problems/reverse-integer/description/) | [solution](https://leetcode.com/problems/reverse-integer/solution/) | [C++](0001-0500/0007-Reverse-Integer/cpp-0007/) | | |
| 008 | [String to Integer (atoi)](https://leetcode.com/problems/string-to-integer-atoi/) | [solution](https://leetcode.com/problems/string-to-integer-atoi/solution/) | [C++](0001-0500/0008-String-to-Integer/cpp-0008/) | | |
| | | | | | |
| 010 | [Regular Expression Matching](https://leetcode.com/problems/regular-expression-matching/) | [solution](https://leetcode.com/problems/regular-expression-matching/solution/) | [C++](0001-0500/0010-Regular-Expression-Matching/cpp-0010/) | | |
| 011 | [Container With Most Water](https://leetcode.com/problems/container-with-most-water/description/) | [solution](https://leetcode.com/problems/container-with-most-water/solution/) | [C++](0001-0500/0011-Container-With-Most-Water/cpp-0011/) | | |
| 012 | [Integer to Roman](https://leetcode.com/problems/integer-to-roman/description/) | [无] | [C++](0001-0500/0012-Integer-to-Roman/cpp-0012/) | | |
| 013 | [Roman to Integer](https://leetcode.com/problems/roman-to-integer/description/) | [无] | [C++](0001-0500/0013-Roman-to-Integer/cpp-0013/) | | |
| 014 | [Longest Common Prefix](https://leetcode.com/problems/longest-common-prefix/description/) | [无] | [C++](0001-0500/0014-Longest-Common-Prefix/cpp-0014/) | | |
| 015 | [3Sum](https://leetcode.com/problems/3sum/description/) | [无] | [C++](0001-0500/0015-3Sum/cpp-0015/) | | |
| 016 | [3Sum Closest](https://leetcode.com/problems/3sum-closest/description/) | [无] | [C++](0001-0500/0016-3Sum-Closest/cpp-0016/) | | |
| 017 | [Letter Combinations of a Phone Number](https://leetcode.com/problems/letter-combinations-of-a-phone-number/description/) | [solution](https://leetcode.com/problems/letter-combinations-of-a-phone-number/solution/) | [C++](0001-0500/0017-Letter-Combinations-of-a-Phone-Number/cpp-0017/) | [Java](0001-0500/0017-Letter-Combinations-of-a-Phone-Number/java-0017/src/) | |
| 018 | [4Sum](https://leetcode.com/problems/4sum/description/) | [无] | [C++](0001-0500/0018-4Sum/cpp-0018/) | | |
| 019 | [Remove Nth Node From End of List](https://leetcode.com/problems/remove-nth-node-from-end-of-list/description/) | [solution](https://leetcode.com/problems/remove-nth-node-from-end-of-list/solution/) | [C++](0001-0500/0019-Remove-Nth-Node-From-End-of-List/cpp-0019/) | [Java](0001-0500/0019-Remove-Nth-Node-From-End-of-List/java-0019/src/) | |
| 020 | [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/description/) | [solution](https://leetcode.com/problems/valid-parentheses/solution/) | [C++](0001-0500/0020-Valid-Parentheses/cpp-0020/) | [Java](0001-0500/0020-Valid-Parentheses/java-0020/src/) | |
| 021 | [Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/description/) | [solution](https://leetcode.com/problems/merge-two-sorted-lists/solution/) | [C++](0001-0500/0021-Merge-Two-Sorted-Lists/cpp-0021/) | | |
| 022 | [Generate Parentheses](https://leetcode.com/problems/generate-parentheses/description/) | [solution](https://leetcode.com/problems/generate-parentheses/solution/) | [C++](0001-0500/0022-Generate-Parentheses/cpp-0022/) | [Java](0001-0500/0022-Generate-Parentheses/java-0022/) | [Python](0022-Generate-Parentheses/py-0022/) |
| 023 | [Merge k Sorted Lists](https://leetcode.com/problems/merge-k-sorted-lists/description/) | [solution](https://leetcode.com/problems/merge-k-sorted-lists/solution/) | [C++](0001-0500/0023-Merge-k-Sorted-Lists/cpp-0023/) | | |
| 024 | [Swap Nodes in Pairs](https://leetcode.com/problems/swap-nodes-in-pairs/description/) | [无] | [C++](0001-0500/0024-Swap-Nodes-in-Pairs/cpp-0024/) | [Java](0001-0500/0024-Swap-Nodes-in-Pairs/java-0024/src/) | |
| 025 | [Reverse Nodes in k-Group](https://leetcode.com/problems/reverse-nodes-in-k-group/description/) | [无] | [C++](0001-0500/0025-Reverse-Nodes-in-k-Group/cpp-0025/) | | |
| 026 | [Remove Duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/description/) | [solution](https://leetcode.com/problems/remove-duplicates-from-sorted-array/solution/) | [C++](0001-0500/0026-Remove-Duplicates-from-Sorted-Array/cpp-0026/) | | |
| 027 | [Remove Element](https://leetcode.com/problems/remove-element/description/) | [solution](https://leetcode.com/problems/remove-element/solution/) | [C++](0001-0500/0027-Remove-Element/cpp-0027/) | | |
| 028 | [Implement strStr()](https://leetcode.com/problems/implement-strstr/description/) | [无]
[缺：完整BM算法, 其他模式匹配算法] | [C++](0001-0500/0028-Implement-strStr/cpp-0028/) | | |
| 029 | [Divide Two Integers](https://leetcode.com/problems/divide-two-integers/) | [solution](https://leetcode.com/problems/divide-two-integers/solution/)
[缺：不使用乘法加法除法] | [C++](0001-0500/0029-Divide-Two-Integers/cpp-0029/) | | |
| 030 | [Substring with Concatenation of All Words](https://leetcode.com/problems/substring-with-concatenation-of-all-words/) | [solution](https://leetcode.com/problems/substring-with-concatenation-of-all-words/solution/) | [C++](0001-0500/0030-Substring-with-Concatenation-of-All-Words/cpp-0030/) | | |
| 031 | [Next Permutation](https://leetcode.com/problems/next-permutation/) | [solution](https://leetcode.com/problems/next-permutation/solution/) | [C++](0001-0500/0031-Next-Permutation/cpp-0031/) | | |
| | | | | | |
| 033 | [Search in Rotated Sorted Array](https://leetcode.com/problems/search-in-rotated-sorted-array/description/) | [solution](https://leetcode.com/problems/search-in-rotated-sorted-array/solution/) | [C++](0001-0500/0033-Search-in-Rotated-Sorted-Array/cpp-0033/) | | |
| 034 | [Search for a Range](https://leetcode.com/problems/search-for-a-range/description/) | [solution](https://leetcode.com/problems/search-for-a-range/solution/) | [C++](0001-0500/0034-Search-for-a-Range/cpp-0034/) | | |
| 035 | [Search Insert Position](https://leetcode.com/problems/search-insert-position/) | [solution](https://leetcode.com/problems/search-insert-position/solution/) | [C++](0001-0500/0035-Search-Insert-Position/cpp-0035/) | | |
| 036 | [Valid Sudoku](https://leetcode.com/problems/valid-sudoku/description/) | [solution](https://leetcode.com/problems/valid-sudoku/solution/) | [C++](0001-0500/0036-Valid-Sudoku/cpp-0036/) | | |
| 037 | [Sudoku Solver](https://leetcode.com/problems/sudoku-solver/description/) | [solution](https://leetcode.com/problems/sudoku-solver/)
[缺：Dancing Links] | [C++](0001-0500/0037-Sudoku-Solver/cpp-0037/) | [C++](0001-0500/0037-Sudoku-Solver/java-0037/) | |
| 038 | [Count and Say](https://leetcode.com/problems/count-and-say/description/) | [无] | [C++](0001-0500/0038-Count-and-Say/cpp-0038/) | | |
| 039 | [Combination Sum](https://leetcode.com/problems/combination-sum/description/) | [无] | [C++](0001-0500/0039-Combination-Sum/cpp-0039/) | | |
| 040 | [Combination Sum II](https://leetcode.com/problems/combination-sum-ii/description/) | [无] | [C++](0001-0500/0040-Combination-Sum-II/cpp-0040/) | | |
| 041 | [First Missing Positive](https://leetcode.com/problems/first-missing-positive/) | [solution](https://leetcode.com/problems/first-missing-positive/solution/) | [C++](0001-0500/0041-First-Missing-Positive/cpp-0041/) | | |
| 042 | [Trapping Rain Water](https://leetcode.com/problems/trapping-rain-water/description/) | [solution](https://leetcode.com/problems/trapping-rain-water/solution/) | [C++](0001-0500/0042-Trapping-Rain-Water/cpp-0042/) | | |
| 043 | [Multiply Strings](https://leetcode.com/problems/multiply-strings/) | [solution](https://leetcode.com/problems/multiply-strings/solution/) | [C++](0001-0500/0043-Multiply-Strings/cpp-0043/) | | |
| | | | | | |
| 045 | [Jump Game II](https://leetcode.com/problems/jump-game-ii/) | [solution](https://leetcode.com/problems/jump-game-ii/solution/) | [C++](0001-0500/0045-Jump-Game-II/cpp-0045/) | | |
| 046 | [Permutations](https://leetcode.com/problems/permutations/description/) | [solution](https://leetcode.com/problems/permutations/solution/)
[缺：排列算法整理] | [C++](0001-0500/0046-Permutations/cpp-0046/) | [Java](0001-0500/0046-Permutations/java-0046/src/) | |
| 047 | [Permutations II](https://leetcode.com/problems/permutations-ii/description/) | [无] | [C++](0001-0500/0047-Permutations-II/cpp-0047/) | | |
| 048 | [Rotate Image](https://leetcode.com/problems/rotate-image/description/) | [solution](https://leetcode.com/problems/rotate-image/) | [C++](0001-0500/0048-Rotate-Image/cpp-0048/) | | |
| 049 | [Group Anagrams](https://leetcode.com/problems/group-anagrams/description/) | [solution](https://leetcode.com/problems/group-anagrams/solution/) | [C++](0001-0500/0049-Group-Anagrams/cpp-0049/) | | |
| 050 | [Pow(x, n)](https://leetcode.com/problems/powx-n/) | [无] | [C++](0001-0500/0050-Pow-x-n/cpp-0050/) | | |
| 051 | [N-Queens](https://leetcode.com/problems/n-queens/description/) | [缺：N皇后问题整理] | [C++](0001-0500/0051-N-Queens/cpp-0051/) | [Java](0001-0500/0051-N-Queens/java-0051/src/) | |
| 052 | [N-Queens II](https://leetcode.com/problems/n-queens-ii/) | [solution](https://leetcode.com/problems/n-queens-ii/solution/)
[缺：N皇后问题整理] | [C++](0001-0500/0052-N-Queens-II/cpp-0052/) | | |
| 053 | [Maximum Subarray](https://leetcode.com/problems/maximum-subarray/) | [solution](https://leetcode.com/problems/maximum-subarray/solution/) | [C++](0001-0500/0053-Maximum-Subarray/cpp-0053/) | | |
| 054 | [Spiral Matrix](https://leetcode.com/problems/spiral-matrix/description/) | [solution](https://leetcode.com/problems/spiral-matrix/solution/) | [C++](0001-0500/0054-Spiral-Matrix/cpp-0054/) | | |
| 055 | [Jump Game](https://leetcode.com/problems/jump-game/) | [solution](https://leetcode.com/problems/jump-game/solution/) | [C++](0001-0500/0055-Jump-Game/cpp-0055/) | | |
| 056 | [Merge Intervals](https://leetcode.com/problems/merge-intervals/description/) | [solution](https://leetcode.com/problems/merge-intervals/solution/) | [C++](0001-0500/0056-Merge-Intervals/cpp-0056/) | | |
| 057 | [Insert Interval](https://leetcode.com/problems/insert-interval/) | [solution](https://leetcode.com/problems/insert-interval/solutions/2914120/insert-intervals/?orderBy=most_votes) | [C++](0001-0500/0057-Insert-Interval/cpp-0057/) | | |
| 058 | [Length of Last Word](https://leetcode.com/problems/length-of-last-word/) | [solution](https://leetcode.com/problems/length-of-last-word/solution/) | [C++](0001-0500/0058-Length-of-Last-Word/cpp-0058/) | | |
| 059 | [Spiral Matrix II](https://leetcode.com/problems/spiral-matrix-ii/description/) | [无] | [C++](0001-0500/0059-Spiral-Matrix-II/cpp-0059/) | | |
| | | | | | |
| 061 | [Rotate List](https://leetcode.com/problems/rotate-list/description/) | [solution](https://leetcode.com/problems/rotate-list/solution/) | [C++](0001-0500/0061-Rotate-List/cpp-0061/) | | |
| 062 | [Unique Paths](https://leetcode.com/problems/unique-paths/) | [无]
[缺：数学解] | [C++](0001-0500/0062-Unique-Paths/cpp-0062/) | | |
| 063 | [Unique Paths II](https://leetcode.com/problems/unique-paths-ii/) | [solution](https://leetcode.com/problems/unique-paths-ii/solution/) | [C++](0001-0500/0063-Unique-Paths-II/cpp-0063/) | | |
| 064 | [Minimum Path Sum](https://leetcode.com/problems/minimum-path-sum/description/) | [solution](https://leetcode.com/problems/minimum-path-sum/solution/) | [C++](0001-0500/0064-Minimum-Path-Sum/cpp-0064/) | [Java](0001-0500/0064-Minimum-Path-Sum/java-0064/src/) | [Python](0001-0500/0064-Minimum-Path-Sum/py-0064/) |
| 065 | [Valid Number](https://leetcode.com/problems/valid-number/) | [solution](https://leetcode.com/problems/valid-number/solution/) | [C++](0001-0500/0065-Valid-Number/cpp-0065/) | | |
| 066 | [Plus One](https://leetcode.com/problems/plus-one/description/) | [无] | [C++](0001-0500/0066-Plus-One/cpp-0066/) | | |
| 067 | [Add Binary](https://leetcode.com/problems/add-binary/description/) | [无] | [C++](0001-0500/0067-Add-Binary/cpp-0067/) | | |
| 068 | [Text Justification](https://leetcode.com/problems/text-justification/) | [无] | [C++](0001-0500/0068-Text-Justification/cpp-0068/) | | |
| 069 | [Sqrt(x)](https://leetcode.com/problems/sqrtx/description/)| [无] | [C++](0001-0500/0069-Sqrt-x/cpp-0069/) | | |
| 070 | [Climbing Stairs](https://leetcode.com/problems/climbing-stairs/description/) | [solution](https://leetcode.com/problems/climbing-stairs/solution/) | [C++](0001-0500/0070-Climbing-Stairs/cpp-0070/) | [Java](0001-0500/0070-Climbing-Stairs/java-0070/src/) | |
| 071 | [Simplify Path](https://leetcode.com/problems/simplify-path/) | [无] | [C++](0001-0500/0071-Simplify-Path/cpp-0071/) | | |
| 072 | [Edit Distance](https://leetcode.com/problems/edit-distance/) | [solution](https://leetcode.com/problems/edit-distance/solution/) | [C++](0001-0500/0072-Edit-Distance/cpp-0072/) | | |
| 073 | [Set Matrix Zeroes](https://leetcode.com/problems/set-matrix-zeroes/description/) | [solution](https://leetcode.com/problems/set-matrix-zeroes/solution/) | [C++](0001-0500/0073-Set-Matrix-Zeroes/cpp-0073/) | | |
| 074 | [Search a 2D Matrix](https://leetcode.com/problems/search-a-2d-matrix/) | [无] | [C++](0001-0500/0074-Search-a-2D-Matrix/cpp-0074/) | | |
| 075 | [Sort Colors](https://leetcode.com/problems/sort-colors/description/) | [solution](https://leetcode.com/problems/sort-colors/solution/) | [C++](0001-0500/0075-Sort-Colors/cpp-0075/) | [Java](0001-0500/0075-Sort-Colors/java-0075/src/) | [Python](0001-0500/0075-Sort-Colors/py-0075/) |
| 076 | [Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring/description/) | [solution](https://leetcode.com/problems/minimum-window-substring/solution/) | [C++](0001-0500/0076-Minimum-Window-Substring/cpp-0076/) | | |
| 077 | [Combinations](https://leetcode.com/problems/combinations/description/) | [solution](https://leetcode.com/problems/combinations/solution/) | [C++](0001-0500/0077-Combinations/cpp-0077/) | [Java](0001-0500/0077-Combinations/java-0077/src/) | |
| 078 | [Subsets](https://leetcode.com/problems/subsets/) | [solution](https://leetcode.com/problems/subsets/solution/) | [C++](0001-0500/0078-Subsets/cpp-0078/) | | |
| 079 | [Word Search](https://leetcode.com/problems/word-search/description/) | [无] | [C++](0001-0500/0079-Word-Search/cpp-0079/) | [Java](0001-0500/0079-Word-Search/java-0079/src/) | |
| 080 | [Remove Duplicates from Sorted Array II](https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/description/) | [无] | [C++](0001-0500/0080-Remove-Duplicates-from-Sorted-Array-II/cpp-0080/) | | |
| 081 | [Search in Rotated Sorted Array II](https://leetcode.com/problems/search-in-rotated-sorted-array-ii/) | [solution](https://leetcode.com/problems/search-in-rotated-sorted-array-ii/solution/) | [C++](0001-0500/0081-Search-in-Rotated-Sorted-Array-II/cpp-0081/) | | |
| 082 | [Remove Duplicates from Sorted List II](https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/) | [无] | [C++](0001-0500/0082-Remove-Duplicates-from-Sorted-List-II/cpp-0082/) | | |
| 083 | [Remove Duplicates from Sorted List](https://leetcode.com/problems/remove-duplicates-from-sorted-list/) | [无] | [C++](0001-0500/0083-Remove-Duplicates-from-Sorted-List/cpp-0083/) | | |
| 084 | [Largest Rectangle in Histogram](https://leetcode.com/problems/largest-rectangle-in-histogram/) | [solution](https://leetcode.com/problems/largest-rectangle-in-histogram/solution/) [题解](https://leetcode-cn.com/problems/largest-rectangle-in-histogram/solution/zhu-zhuang-tu-zhong-zui-da-de-ju-xing-by-leetcode/) | [C++](0001-0500/0084-Largest-Rectangle-in-Histogram/cpp-0084/) | | |
| 085 | [Maximal Rectangle](https://leetcode.com/problems/maximal-rectangle/) | [solution](https://leetcode.com/problems/maximal-rectangle/solution/) | [C++](0001-0500/0085-Maximal-Rectangle/cpp-0085/) | | |
| 086 | [Partition List](https://leetcode.com/problems/partition-list/description/) | [solution](https://leetcode.com/problems/partition-list/solution/) | [C++](0001-0500/0086-Partition-List/cpp-0086/) | | |
| 087 | [Scramble String](https://leetcode.com/problems/scramble-string/description/) | [无] | [C++](0001-0500/0087-Scramble-String/cpp-0087/) | | |
| 088 | [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/description/) | [solution](https://leetcode.com/problems/merge-sorted-array/solution/) | [C++](0001-0500/0088-Merge-Sorted-Array/cpp-0088/) | [Java](0001-0500/0088-Merge-Sorted-Array/java-0088/) | |
| 089 | [Gray Code](https://leetcode.com/problems/gray-code/) | [无] | [C++](0001-0500/0089-Gray-Code/cpp-0089/) | | |
| 090 | [Subsets II](https://leetcode.com/problems/subsets-ii/) | [无] | [C++](0001-0500/0090-Subsets-II/cpp-0090/) | | |
| 091 | [Decode Ways](https://leetcode.com/problems/decode-ways/) | [无] | [C++](0001-0500/0091-Decode-Ways/cpp-0091/) | | |
| 092 | [Reverse Linked List II](https://leetcode.com/problems/reverse-linked-list-ii/description/) | [solution](https://leetcode.com/problems/reverse-linked-list-ii/solution/) | [C++](0001-0500/0092-Reverse-Linked-List-II/cpp-0092/) | | |
| 093 | [Restore IP Addresses](https://leetcode.com/problems/restore-ip-addresses/) | [solution](https://leetcode.com/problems/restore-ip-addresses/solution/) | [C++](0001-0500/0093-Restore-IP-Addresses/cpp-0093/) | | |
| 094 | [Binary Tree Inorder Traversal](https://leetcode.com/problems/binary-tree-inorder-traversal/description/) | [solution](https://leetcode.com/problems/binary-tree-inorder-traversal/solution/) | [C++](0001-0500/0094-Binary-Tree-Inorder-Traversal/cpp-0094/) | [Java](0001-0500/0094-Binary-Tree-Inorder-Traversal/java-0094/src/) | |
| 095 | [Unique Binary Search Trees II](https://leetcode.com/problems/unique-binary-search-trees-ii/description/) | [solution](https://leetcode.com/problems/unique-binary-search-trees-ii/solution/) | [C++](0001-0500/0095-Unique-Binary-Search-Trees-II/cpp-0095/) | | |
| 096 | [Unique Binary Search Trees](https://leetcode.com/problems/unique-binary-search-trees/description/) | [solution](https://leetcode.com/problems/unique-binary-search-trees/solution/) | [C++](0001-0500/0096-Unique-Binary-Search-Trees/cpp-0096/) | | |
| 097 | [Interleaving String](https://leetcode.com/problems/interleaving-string/) | [solution](https://leetcode.com/problems/interleaving-string/solution/)
[缺：DP] | [C++](0001-0500/0097-Interleaving-String/cpp-0097/) | | |
| 098 | [Validate Binary Search Tree](https://leetcode.com/problems/validate-binary-search-tree/description/) | [solution](https://leetcode.com/problems/validate-binary-search-tree/solution/) | [C++](0001-0500/0098-Validate-Binary-Search-Tree/cpp-0098/) | [Java](0001-0500/0098-Validate-Binary-Search-Tree/java-0098/src/) | |
| 099 | [Recover Binary Search Tree](https://leetcode.com/problems/recover-binary-search-tree/description/) | [无] | | [Java](0001-0500/0099-Recover-Binary-Search-Tree/java-0099/src/) | |
| 100 | [Same Tree](https://leetcode.com/problems/same-tree/description/) | [solution](https://leetcode.com/problems/same-tree/solution/) | [C++](0001-0500/0100-Same-Tree/cpp-0100/) | | |
| 101 | [Symmetric Tree](https://leetcode.com/problems/symmetric-tree/description/) | [solution](https://leetcode.com/problems/symmetric-tree/solution/) | [C++](0001-0500/0101-Symmetric-Tree/cpp-0101/) | | [Python](0001-0500/0101-Symmetric-Tree/py-0101/) |
| 102 | [Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/description/) | [solution](https://leetcode.com/problems/binary-tree-level-order-traversal/solution/) | [C++](0001-0500/0102-Binary-Tree-Level-Order-Traversal/cpp-0102/) | [Java](0001-0500/0102-Binary-Tree-Level-Order-Traversal/java-0102/src/) | |
| 103 | [Binary Tree Zigzag Level Order Traversal](https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/) | [无] | [C++](0001-0500/0103-Binary-Tree-Zigzag-Level-Order-Traversal/cpp-0103/) | | |
| 104 | [Maximum Depth of Binary Tree](https://leetcode.com/problems/maximum-depth-of-binary-tree/description/) | [solution](https://leetcode.com/problems/maximum-depth-of-binary-tree/solution/) | [C++](0001-0500/0104-Maximum-Depth-of-Binary-Tree/cpp-0104/) | [Java](0001-0500/0104-Maximum-Depth-of-Binary-Tree/java-0104/src/) | |
| 105 | [Construct Binary Tree from Preorder and Inorder Traversal](https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/description/) | [solution](https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/solution/) | [C++](0001-0500/0105-Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal/cpp-0105/) | | |
| 106 | [Construct Binary Tree from Inorder and Postorder Traversal](https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/description/) | [无] | [C++](0001-0500/0106-Construct-Binary-Tree-from-Inorder-and-Postorder-Traversal/cpp-0106/) | | |
| 107 | [Binary Tree Level Order Traversal II](https://leetcode.com/problems/binary-tree-level-order-traversal-ii/description/) | [无] | [C++](0001-0500/0107-Binary-Tree-Level-Order-Traversal-II/cpp-0107/) | | |
| 108 | [Convert Sorted Array to Binary Search Tree](https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/) | [无] | [C++](0001-0500/0108-Convert-Sorted-Array-to-Binary-Search-Tree/cpp-0108/) | | |
| 109 | [Convert Sorted List to Binary Search Tree](https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/description/) | [solution](https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/solution/) | [C++](0001-0500/0109-Convert-Sorted-List-to-Binary-Search-Tree/cpp-0109/) | | |
| 110 | [Balanced Binary Tree](https://leetcode.com/problems/balanced-binary-tree/) | [solution](https://leetcode.com/problems/balanced-binary-tree/solution/) | [C++](0001-0500/0110-Balanced-Binary-Tree/cpp-0110/) | | |
| 111 | [Minimum Depth of Binary Tree](https://leetcode.com/problems/minimum-depth-of-binary-tree/description/) | [solution](https://leetcode.com/problems/minimum-depth-of-binary-tree/solution/) | [C++](0001-0500/0111-Minimum-Depth-of-Binary-Tree/cpp-0111/) | | |
| 112 | [Path Sum](https://leetcode.com/problems/path-sum/description/) | [solution](https://leetcode.com/problems/path-sum/solution/) | [C++](0001-0500/0112-Path-Sum/cpp-0112/) | [Java](0001-0500/0112-Path-Sum/cpp-0112/src/) | |
| 113 | [Path Sum II](https://leetcode.com/problems/path-sum-ii/description/) | [无] | [C++](0001-0500/0113-Path-Sum-II/cpp-0113/) | | |
| 114 | [Flatten Binary Tree to Linked List](https://leetcode.com/problems/flatten-binary-tree-to-linked-list/) | [solution](https://leetcode.com/problems/flatten-binary-tree-to-linked-list/solution/) | [C++](0001-0500/0114-Flatten-Binary-Tree-to-Linked-List/cpp-0114/) | | |
| 115 | [Distinct Subsequences](https://leetcode.com/problems/distinct-subsequences/description/) | [无] | [C++](0001-0500/0115/Distinct-Subsequences/cpp-0115/) | [Java](0001-0500/0115/Distinct-Subsequences/java-0115/) | |
| 116 | [Populating Next Right Pointers in Each Node](https://leetcode.com/problems/populating-next-right-pointers-in-each-node/description/) | [无] | [C++](0001-0500/0116-Populating-Next-Right-Pointers-in-Each-Node/cpp-0116/) | | |
| 117 | [Populating Next Right Pointers in Each Node II](https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/) | [无] | [C++](0001-0500/0117-Populating-Next-Right-Pointers-in-Each-Node-II/cpp-0117/) | | |
| 118 | [Pascal's Triangle](https://leetcode.com/problems/pascals-triangle/description/) | [solution](https://leetcode.com/problems/pascals-triangle/solution/) | [C++](0001-0500/0118-Pascals-Triangle/cpp-0118/) | | |
| 119 | [Pascal's Triangle II](https://leetcode.com/problems/pascals-triangle-ii/description/) | [无] | [C++](0001-0500/0119-Pascals-Triangle-II/cpp-0119/) | | |
| 120 | [Triangle](https://leetcode.com/problems/triangle/description/) | [无] | [C++](0001-0500/0120-Triangle/cpp-0120/) | | |
| 121 | [Best Time to Buy and Sell Stock](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/solution/) | | [C++](0001-0500/0121-Best-Time-to-Buy-and-Sell-Stock/cpp-0121/) | | |
| 122 | [Best Time to Buy and Sell Stock II](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/description/) | [solution](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/solution/) | [C++](0001-0500/0122-Best-Time-to-Buy-and-Sell-Stock-II/cpp-0122/) | | |
| 123 | [Best Time to Buy and Sell Stock III](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/description/) | | [C++](0001-0500/0123-Best-Time-to-Buy-and-Sell-Stock-III/cpp-0123/) | | |
| 124 | [Binary Tree Maximum Path Sum](https://leetcode.com/problems/binary-tree-maximum-path-sum/) | [solution](https://leetcode.com/problems/binary-tree-maximum-path-sum/) | [C++](0001-0500/0124-Binary-Tree-Maximum-Path-Sum/cpp-0124/) | | |
| 125 | [Valid Palindrome](https://leetcode.com/problems/valid-palindrome/description/) | [无] | [C++](0001-0500/0125-Valid-Palindrome/cpp-0125/) | | |
| 126 | [Word Ladder II](https://leetcode.com/problems/word-ladder-ii/description/) | [无]
[缺：双端搜索] | [C++](0001-0500/0126-Word-Ladder-II/cpp-0126/) | | |
| 127 | [Word Ladder](https://leetcode.com/problems/word-ladder/description/) | [solution](https://leetcode.com/problems/word-ladder/solution/) | [C++](0001-0500/0127-Word-Ladder/cpp-0127/) | [Java](0001-0500/0127-Word-Ladder/java-0127/) | |
| 128 | [Longest Consecutive Sequence](https://leetcode.com/problems/longest-9consecutive-sequence/description/) | | [C++](0001-0500/0128-Longest-Consecutive-Sequence/cpp-0128/) | | |
| 129 | [Sum Root to Leaf Numbers](https://leetcode.com/problems/sum-root-to-leaf-numbers/description/) | [无] | [C++](0001-0500/0129-Sum-Root-to-Leaf-Numbers/cpp-0129/) | | |
| 130 | [Surrounded Regions](https://leetcode.com/problems/surrounded-regions/description/) | [无] | [C++](0001-0500/0130-Surrounded-Regions/cpp-0130/) | | |
| 131 | [Palindrome Partitioning](https://leetcode.com/problems/palindrome-partitioning/) | [solution](https://leetcode.com/problems/palindrome-partitioning/solution/)
[缺：DP] | [C++](0001-0500/0131-Palindrome-Partitioning/cpp-0131/) | | |
| 132 | [Palindrome Partitioning II](https://leetcode.com/problems/palindrome-partitioning-ii/) | [无] | [C++](0001-0500/0132-Palindrome-Partitioning-II/cpp-0132/) | | |
| 133 | [Clone Graph](https://leetcode.com/problems/clone-graph/description/) | [无] | [C++](0001-0500/0133-Clone-Graph/cpp-0133/) | | |
| 134 | [Gas Station](https://leetcode.com/problems/gas-station/) | [solution](https://leetcode.com/problems/gas-station/solution/) | [C++](0001-0500/0134-Gas-Station/cpp-0134/) | | |
| 135 | [Candy](https://leetcode.com/problems/candy/) | [solution](https://leetcode.com/problems/candy/solution/)
[缺：O(1)空间算法] | [C++](0001-0500/0135-Candy/cpp-0135/) | | |
| 136 | [Single Number](https://leetcode.com/problems/single-number/description/) | [solution](https://leetcode.com/problems/single-number/solution/) | [C++](0001-0500/0136-Single-Number/cpp-0136/) | | |
| 137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [solution](https://leetcode.com/problems/single-number-ii/solution/) | [C++](0001-0500/0137-Single-Number-II/cpp-0137/) | | |
| 138 | [Copy List with Random Pointer](https://leetcode.com/problems/copy-list-with-random-pointer/description/) | [solution](https://leetcode.com/problems/copy-list-with-random-pointer/solution/) | [C++](0001-0500/0138-Copy-List-with-Random-Pointer/cpp-0138/) | | |
| 139 | [Word Break](https://leetcode.com/problems/word-break/) | [solution](https://leetcode.com/problems/word-break/solution/) | [C++](0001-0500/0139-Word-Break/cpp-0139/) | | |
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| 141 | [Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/description/) | [solution](https://leetcode.com/problems/linked-list-cycle/solution/) | [C++](0001-0500/0141-Linked-List-Cycle/cpp-0141/) | | |
| 142 | [Linked List Cycle II](https://leetcode.com/problems/linked-list-cycle-ii/description/) | [solution](https://leetcode.com/problems/linked-list-cycle-ii/description/) | [C++](0001-0500/0142-Linked-List-Cycle-II/cpp-0142/) | | |
| 143 | [Reorder List](https://leetcode.com/problems/reorder-list/) | [无] | [C++](0001-0500/0143-Reorder-List/cpp-0143/) | | |
| 144 | [Binary Tree Preorder Traversal](https://leetcode.com/problems/binary-tree-preorder-traversal/description/) | [solution](https://leetcode.com/problems/binary-tree-preorder-traversal/) | [C++](0001-0500/0144-Binary-Tree-Preorder-Traversal/cpp-0144/) | [Java](0001-0500/0144-Binary-Tree-Preorder-Traversal/java-0144/src/) | |
| 145 | [Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/description/) | [solution](https://leetcode.com/problems/binary-tree-postorder-traversal/solution/) | [C++](0001-0500/0145-Binary-Tree-Postorder-Traversal/cpp-0145/) | [Java](0001-0500/0145-Binary-Tree-Postorder-Traversal/java-0145/src/) | |
| 146 | [LRU Cache](https://leetcode.com/problems/lru-cache/) | [solution](https://leetcode.com/problems/lru-cache/solution/)
[缺：封装一个Double Linked List] | [C++](0001-0500/0146-LRU-Cache/cpp-0146/) | | |
| 147 | [Insertion Sort List](https://leetcode.com/problems/insertion-sort-list/) | [无] | [C++](0001-0500/0147-Insertion-Sort-List/cpp-0147/) | | |
| 148 | [Sort List](https://leetcode.com/problems/sort-list/description/) | [无] | [C++](0001-0500/0148-Sort-List/cpp-0148/) | | |
| 149 | [Max Points on a Line](https://leetcode.com/problems/max-points-on-a-line/description/) | [solution](https://leetcode.com/problems/max-points-on-a-line/solution/) | [C++](0001-0500/0149-Max-Points-on-a-Line/cpp-0149/) | | |
| 150 | [Evaluate Reverse Polish Notation](https://leetcode.com/problems/evaluate-reverse-polish-notation/description/) | [无] | [C++](0001-0500/0150-Evaluate-Reverse-Polish-Notation/cpp-0150/) | | |
| 151 | [Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/description/) | [无] | [C++](0001-0500/151-Reverse-Words-in-a-String/cpp-0151/) | | |
| 152 | [Maximum Product Subarray](https://leetcode.com/problems/maximum-product-subarray/) | [solution](https://leetcode.com/problems/maximum-product-subarray/)
[缺：Linear] | [C++](0001-0500/0152-Maximum-Product-Subarray/cpp-0152/) | | [Python](0001-0500/0152-Maximum-Product-Subarray/py-0152/) |
| 153 | [Find Minimum in Rotated Sorted Array](https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/description/) | [solution](https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/solution/) | [C++](0001-0500/0153-Find-Minimum-in-Rotated-Sorted-Array/cpp-0153/) | | |
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| 155 | [Min Stack](https://leetcode.com/problems/min-stack/description/) | [无] | [C++](0001-0500/0155-Min-Stack/cpp-0155/) | | |
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| 159 | [Longest Substring with At Most Two Distinct Characters](https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/description/) | [solution](https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/solution/) | [C++](0001-0500/0159-Longest-Substring-with-At-Most-Two-Distinct-Characters/cpp-0159/) | | |
| 160 | [Intersection of Two Linked Lists](https://leetcode.com/problems/intersection-of-two-linked-lists/description/) | [solution](https://leetcode.com/problems/intersection-of-two-linked-lists/solution/) | [C++](0001-0500/0160-Intersection-of-Two-Linked-Lists/cpp-0160/) | | |
| 161 | [One Edit Distance](https://leetcode.com/problems/one-edit-distance/) | [solution](https://leetcode.com/problems/one-edit-distance/solution/) | [C++](0001-0500/0161-One-Edit-Distance/cpp-0161/) | | |
| 162 | [Find Peak Element](https://leetcode.com/problems/find-peak-element/) | [solution](https://leetcode.com/problems/find-peak-element/solution/) | [C++](0001-0500/0162-Find-Peak-Element/cpp-0162/) | | |
| 163 | [Missing Ranges](https://leetcode.com/problems/missing-ranges/) | [solution](https://leetcode.com/problems/missing-ranges/solution/) | [C++](0001-0500/0163-Missing-Ranges/cpp-0163/) | | |
| 164 | [Maximum Gap](https://leetcode.com/problems/maximum-gap/) | [solution](https://leetcode.com/problems/maximum-gap/solution/)
[缺：桶排序] | [C++](0001-0500/0164-Maximum-Gap/cpp-0164/) | | |
| 165 | [Compare Version Numbers](https://leetcode.com/problems/compare-version-numbers/) | [solution](https://leetcode.com/problems/compare-version-numbers/solution/) | [C++](0001-0500/0165-Compare-Version-Numbers/cpp-0165/) | | |
| 166 | [Fraction to Recurring Decimal](https://leetcode.com/problems/fraction-to-recurring-decimal/) | [solution](https://leetcode.com/problems/fraction-to-recurring-decimal/solution/) | [C++](0001-0500/0166-Fraction-to-Recurring-Decimal/cpp-0166/) | | |
| 167 | [Two Sum II - Input array is sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/description/) | [solution](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/solution/) | [C++](0001-0500/0167-Two-Sum-II-Input-array-is-sorted/cpp-0167/) | [Java](0001-0500/0167-Two-Sum-II-Input-array-is-sorted/java-0167/src/) | |
| 168 | [Excel Sheet Column Title](https://leetcode.com/problems/excel-sheet-column-title/) | [无] | [C++](0001-0500/0168-Excel-Sheet-Column-Title/cpp-0168/) | | |
| 169 | [Majority Element](https://leetcode.com/problems/majority-element/description/) | [solution](https://leetcode.com/problems/majority-element/solution/) | [C++](0001-0500/0169-Majority-Element/cpp-0169/) | | [Python](0001-0500/0169-Majority-Element/py-0169/) |
| 170 | [Two Sum III - Data structure design](https://leetcode.com/problems/two-sum-iii-data-structure-design/description/) | [无] | [C++](0001-0500/0170-Two-Sum-III-Data-structure-design/cpp-0170/) | | |
| 171 | [Excel Sheet Column Number](https://leetcode.com/problems/excel-sheet-column-number/description/) | [无] | [C++](0001-0500/0171-Excel-Sheet-Column-Number/cpp-0171/) | | |
| 172 | [Factorial Trailing Zeroes](https://leetcode.com/problems/factorial-trailing-zeroes/) | [solution](https://leetcode.com/problems/factorial-trailing-zeroes/solution/) | [C++](0001-0500/0172/Factorial-Trailing-Zeroes/cpp-0172/) | | |
| 173 | [Binary Search Tree Iterator](https://leetcode.com/problems/binary-search-tree-iterator/description/) | [无]
[缺：Morris遍历] | [C++](0001-0500/0173-Binary-Search-Tree-Iterator/cpp-0173/) | | |
| 174 | [Dungeon Game](https://leetcode.com/problems/dungeon-game/) | [solution](https://leetcode.com/problems/dungeon-game/solution/) | [C++](0001-0500/0174-Dungeon-Game/cpp-0174/) | | |
| 175 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
| 176 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
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| 179 | [Largest Number](https://leetcode.com/problems/largest-number/) | [无] | [C++](0001-0500/0179-Largest-Number/cpp-0179/) | | |
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| 181 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
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| 184 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
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| 186 | [Reverse Words in a String II](https://leetcode.com/problems/reverse-words-in-a-string-ii/description/) | [无] | [C++](0001-0500/0186-Reverse-Words-in-a-String-II/cpp-0186/) | | |
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| 188 | [Best-Time-to-Buy-and-Sell-Stock-IV](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/description/) | | [C++](0001-0500/0188-Best-Time-to-Buy-and-Sell-Stock-IV/cpp-0188/) | | |
| 189 | [Rotate Array](https://leetcode.com/problems/rotate-array/description/) | [solution](https://leetcode.com/problems/rotate-array/solution/) | [C++](0001-0500/0189-Rotate-Array/cpp-0189/) | | |
| 190 | [Reverse Bits](https://leetcode.com/problems/reverse-bits/) | [solution](https://leetcode.com/problems/reverse-bits/solution/) | [C++](0001-0500/0190-Reverse-Bits/cpp-0190/) | | |
| 191 | [Number of 1 Bits](https://leetcode.com/problems/number-of-1-bits/description/) | [solution](https://leetcode.com/problems/number-of-1-bits/solution/) | [C++](0001-0500/0191-Number-of-1-Bits/cpp-0191/) | | |
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| 196 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
| 197 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
| 198 | [House Robber](https://leetcode.com/problems/house-robber/description/) | [solution](https://leetcode.com/problems/house-robber/solution/) | [C++](0001-0500/0198-House-Robber/cpp-0198/) | [Java](0001-0500/0198-House-Robber/java-0198/src/) | |
| 199 | [Binary Tree Right Side View](https://leetcode.com/problems/binary-tree-right-side-view/) | [solution](https://leetcode.com/problems/binary-tree-right-side-view/solution/) | [C++](0001-0500/199-Binary-Tree-Right-Side-View/cpp-0199/) | | |
| 200 | [Number of Islands](https://leetcode.com/problems/number-of-islands/description/) | [solution](https://leetcode.com/problems/number-of-islands/solution/) | [C++](0001-0500/0200-Number-of-Islands/cpp-0200/) | [Java](0001-0500/0200-Number-of-Islands/java-0200/src/) | |
| 201 | [Bitwise AND of Numbers Range](https://leetcode.com/problems/bitwise-and-of-numbers-range/) | [solution](https://leetcode.com/problems/bitwise-and-of-numbers-range/solution/) | [C++](0001-0500/0201-Bitwise-AND-of-Numbers-Range/cpp-0201/) | | |
| 202 | [Happy Number](https://leetcode.com/problems/happy-number/description/) | [solution](https://leetcode.com/problems/happy-number/solution/) | [C++](0001-0500/0202-Happy-Number/cpp-0202/) | | |
| 203 | [Remove Linked List Elements](https://leetcode.com/problems/remove-linked-list-elements/description/) | [无] | [C++](0001-0500/0203-Remove-Linked-List-Elements/cpp-0203/) | [Java](0001-0500/0203-Remove-Linked-List-Elements/java-0203/src/) | |
| 204 | [Count Primes](https://leetcode.com/problems/count-primes/) | [无] | [C++](0001-0500/0204-Count-Primes/cpp-0204/) | | |
| 205 | [Isomorphic Strings](https://leetcode.com/problems/isomorphic-strings/description/) | [无] | [C++](0001-0500/0205-Isomorphic-Strings/cpp-0205/) | | |
| 206 | [Reverse Linked List](https://leetcode.com/problems/reverse-linked-list/description/) | [solution](https://leetcode.com/problems/reverse-linked-list/solution/) | [C++](0001-0500/0206-Reverse-Linked-List/cpp-0206/) | [Java](0001-0500/0206-Reverse-Linked-List/java-0206/src/) | |
| 207 | [Course Schedule](https://leetcode.com/problems/course-schedule/) | [无] | [C++](0001-0500/0207-Course-Schedule/cpp-0207/) | | |
| 208 | [Implement Trie (Prefix Tree)](https://leetcode.com/problems/implement-trie-prefix-tree/description/) | [solution](https://leetcode.com/problems/implement-trie-prefix-tree/solution/) | [C++](0001-0500/0208-Implement-Trie-Prefix-Tree/cpp-0208/) | | |
| 209 | [Minimum Size Subarray Sum](https://leetcode.com/problems/minimum-size-subarray-sum/description/) | [solution](https://leetcode.com/problems/minimum-size-subarray-sum/solution/) | [C++](0001-0500/0209-Minimum-Size-Subarray-Sum/cpp-0209/) | [Java](0001-0500/0209-Minimum-Size-Subarray-Sum/java-0209/src/) | |
| 210 | [Course Schedule II](https://leetcode.com/problems/course-schedule-ii/) | [solution](https://leetcode.com/problems/course-schedule-ii/solution/) | [C++](0001-0500/0210-Course-Schedule-II/cpp-0210/) | | |
| 211 | [Add and Search Word - Data structure design](https://leetcode.com/problems/add-and-search-word-data-structure-design/description/) | [无] | [C++](0001-0500/0211-Add-and-Search-Word-Data-structure-design/cpp-0211/) | [Java](0001-0500/0211-Add-and-Search-Word-Data-structure-design/java-0211/) | |
| 212 | [Word Search II](https://leetcode.com/problems/word-search-ii/) | [无] | [C++](0001-0500/0212-Word-Search-II/cpp-0212/) | | |
| 213 | [House Robber II](https://leetcode.com/problems/house-robber-ii/description/) | [无] | [C++](0001-0500/0213/House-Robber-II/cpp-0213/) | | |
| | | | | | |
| 215 | [Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/description/) | [solution](https://leetcode.com/problems/kth-largest-element-in-an-array/solution/) | [C++](0001-0500/0215-Kth-Largest-Element-in-an-Array/cpp-0215/) | | |
| 216 | [Combination Sum III](https://leetcode.com/problems/combination-sum-iii/description/) | [无] | [C++](0001-0500/0216/Combination-Sum-III/cpp-0216/) | | |
| 217 | [Contains Duplicate](https://leetcode.com/problems/contains-duplicate/description/) | [无] | [C++](0001-0500/0217/Contains-Duplicate/cpp-0217/) | | |
| 218 | [The Skyline Problem](https://leetcode.com/problems/the-skyline-problem/description/) | | [C++](0001-0500/0218-The-Skyline-Problem/cpp-0218/) | | |
| 219 | [Contains Duplicate II](https://leetcode.com/problems/contains-duplicate-ii/description/) | [solution](https://leetcode.com/problems/contains-duplicate-ii/solution/) | [C++](0001-0500/0219-Contains-Duplicate-II/cpp-0219/) | [Java](0001-0500/0219-Contains-Duplicate-II/java-0219/src/) | |
| 220 | [Contains Duplicate III](https://leetcode.com/problems/contains-duplicate-iii/description/) | [solution](https://leetcode.com/problems/contains-duplicate-iii/solution/) | [C++](0001-0500/0220-Contains-Duplicate-III/cpp-0220/) | [Java](0001-0500/0220-Contains-Duplicate-III/java-0220/) | |
| 221 | [Maximal Square](https://leetcode.com/problems/maximal-square/) | [solution](https://leetcode.com/problems/maximal-square/solution/) | [C++](0001-0500/0221-Maximal-Square/cpp-0221) | | [Python](0001-0500/0221-Maximal-Square/py-0221) |
| 222 | [Count Complete Tree Nodes](https://leetcode.com/problems/count-complete-tree-nodes/description/) | [无] | [C++](0001-0500/0222-Count-Complete-Tree-Nodes/cpp-0222/) | | |
| 223 | [Rectangle Area](https://leetcode.com/problems/rectangle-area/) | [无] | [C++](0001-0500/0223-Rectangle-Area/cpp-0223/) | | |
| 224 | [Basic Calculator](https://leetcode.com/problems/basic-calculator/description/) | [无] | [C++](0001-0500/0224-Basic-Calculator/cpp-0224/) | | |
| 225 | [Implement Stack using Queues](https://leetcode.com/problems/implement-stack-using-queues/description/) | [solution](https://leetcode.com/problems/implement-stack-using-queues/solution/) | [C++](0001-0500/0225-Implement-Stack-using-Queues/cpp-0225/) | | |
| 226 | [Invert Binary Tree](https://leetcode.com/problems/invert-binary-tree/description/) | [solution](https://leetcode.com/problems/invert-binary-tree/solution/) | [C++](0001-0500/0226-Invert-Binary-Tree/cpp-0226/) | [Java](0001-0500/0226-Invert-Binary-Tree/java-0226/src/) | [Python](0001-0500/0226-Invert-Binary-Tree/py-0226/) |
| 227 | [Basic Calculator II](https://leetcode.com/problems/basic-calculator-ii/description/) | [无] | [C++](0001-0500/0227-Basic-Calculator-II/cpp-0227/) | | |
| 228 | [Summary Ranges](https://leetcode.com/problems/summary-ranges/) | [solution](https://leetcode.com/problems/summary-ranges/solution/) | [C++](0001-0500/0228-Summary-Ranges/cpp-0228/) | | |
| 229 | [Majority Element II](https://leetcode.com/problems/majority-element-ii/) | [solution](https://leetcode.com/problems/majority-element-ii/solution/)
[缺：BM Voting] | [C++](0001-0500/0229-Majority-Element-II/cpp-0229/) | | |
| 230 | [Kth Smallest Element in a BST](https://leetcode.com/problems/kth-smallest-element-in-a-bst/description/) | [solution](https://leetcode.com/problems/kth-smallest-element-in-a-bst/solution/)
[缺：非递归] | [C++](0001-0500/0230-Kth-Smallest-Element-in-a-BST/cpp-0230/) | | |
| 231 | [Power of Two](https://leetcode.com/problems/power-of-two/) | [solution](https://leetcode.com/problems/power-of-two/solution/) | [C++](0001-0500/0231-Power-of-Two/cpp-0231/) | | |
| 232 | [Implement Queue using Stacks](https://leetcode.com/problems/implement-queue-using-stacks/description/) | [solution](https://leetcode.com/problems/implement-queue-using-stacks/solution/) | [C++](0001-0500/0232-Implement-Queue-using-Stacks/cpp-0232/) | | |
| 233 | [Number of Digit One](https://leetcode.com/problems/number-of-digit-one/) | [solution](https://leetcode.com/problems/number-of-digit-one/solution/)
[缺：数学方法] | [C++](0001-0500/0233-Number-of-Digit-One/cpp-0233/) | | |
| 234 | [Palindrome Linked List](https://leetcode.com/problems/palindrome-linked-list/description/) | [无] | [C++](0001-0500/0234-Palindrome-Linked-List/cpp-0234/) | | |
| 235 | [Lowest Common Ancestor of a Binary Search Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/description/) | [solution](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/solution/) | [C++](0001-0500/0235-Lowest-Common-Ancestor-of-a-Binary-Search-Tree/cpp-0235/) | [Java](0001-0500/0235-Lowest-Common-Ancestor-of-a-Binary-Search-Tree/java-0235/src/) | |
| 236 | [Lowest Common Ancestor of a Binary Tree](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/description/) | [solution](https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/solution/)
[缺：非递归解法；LCA问题总结] | [C++](0001-0500/0236-Lowest-Common-Ancestor-of-a-Binary-Tree/cpp-0236/) | | |
| 237 | [Delete Node in a Linked List](https://leetcode.com/problems/delete-node-in-a-linked-list/description/) | [solution](https://leetcode.com/problems/delete-node-in-a-linked-list/solution/) | [C++](0001-0500/0237-Delete-Node-in-a-Linked-List/cpp-0237/) | [Java](0001-0500/0237-Delete-Node-in-a-Linked-List/java-0237/src/) | |
| 238 | [Product of Array Except Self](https://leetcode.com/problems/product-of-array-except-self/) | [solution](https://leetcode.com/problems/product-of-array-except-self/solution/) | [C++](0001-0500/0238-Product-of-Array-Except-Self/cpp-0238/) | | [Python](0001-0500/0238-Product-of-Array-Except-Self/py-0238/) |
| 239 | [Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/description/) | [solution](https://leetcode.com/problems/sliding-window-maximum/solution/) | [C++](0001-0500/0239-Sliding-Window-Maximum/cpp-0239/) | | |
| 240 | [Search a 2D Matrix II](https://leetcode.com/problems/search-a-2d-matrix-ii/) | [solution](https://leetcode.com/problems/search-a-2d-matrix-ii/solution/)
[缺：分治] | [C++](0001-0500/240-Search-a-2D-Matrix-II/cpp-240/) | | |
| 241 | [Different Ways to Add Parentheses](https://leetcode.com/problems/different-ways-to-add-parentheses/) | [无] | [C++](0001-0500/241-Different-Ways-to-Add-Parentheses/cpp-241/) | | |
| 242 | [Valid Anagram](https://leetcode.com/problems/valid-anagram/description/) | [solution](https://leetcode.com/problems/valid-anagram/solution/) | [C++](0001-0500/0242-Valid-Anagram/cpp-0242/) | | |
| 243 | [Shortest Word Distance](https://leetcode.com/problems/shortest-word-distance/) | [solution](https://leetcode.com/problems/shortest-word-distance/solution/) | [C++](0001-0500/0243-Shortest-Word-Distance/cpp-0243/) | | |
| 244 | [Shortest Word Distance II](https://leetcode.com/problems/shortest-word-distance-ii/) | [solution](https://leetcode.com/problems/shortest-word-distance-ii/solution/) | [C++](0001-0500/0244-Shortest-Word-Distance-II/cpp-0244/) | | |
| 245 | [Shortest Word Distance III](https://leetcode.com/problems/shortest-word-distance-iii/) | [无] | [C++](0001-0500/0245-Shortest-Word-Distance-III/cpp-0245/) | | |
| 246 | [Strobogrammatic Number](https://leetcode.com/problems/strobogrammatic-number/) | [solution](https://leetcode.com/problems/strobogrammatic-number/solution/) | [C++](0001-0500/0246-Strobogrammatic-Number/cpp-0246/) | | |
| 247 | [Strobogrammatic Number II](https://leetcode.com/problems/strobogrammatic-number-ii/) | [无] | [C++](0001-0500/0247-Strobogrammatic-Number-II/cpp-0247/) | | |
| 248 | [Strobogrammatic Number III](https://leetcode.com/problems/strobogrammatic-number-iii/) | [无] | [C++](0001-0500/0248-Strobogrammatic-Number-III/cpp-0248/) | | |
| 249 | [Group Shifted Strings](https://leetcode.com/problems/group-shifted-strings/description/) | [无] | [C++](0001-0500/0249-Group-Shifted-Strings/cpp-0249/) | | |
| 250 | [Count Univalue Subtrees](https://leetcode.com/problems/count-univalue-subtrees/description/) | [solution](https://leetcode.com/problems/count-univalue-subtrees/solution/) | [C++](0001-0500/0250-Count-Univalue-Subtrees/cpp-0250/) | | |
| 251 | [Flatten 2D Vector](https://leetcode.com/problems/flatten-2d-vector/) | [solution](https://leetcode.com/problems/flatten-2d-vector/solution/) | [C++](0001-0500/0251-Flatten-2D-Vector/cpp-0251/) | | |
| 252 | [Meeting Rooms](https://leetcode.com/problems/meeting-rooms/description/) | [solution](https://leetcode.com/problems/meeting-rooms/solution/) | [C++](0001-0500/0252-Meeting-Rooms/cpp-0252/) | | |
| 253 | [Meeting Rooms II](https://leetcode.com/problems/meeting-rooms-ii/description/) | [solution](https://leetcode.com/problems/meeting-rooms-ii/solution/) | [C++](0001-0500/0253-Meeting-Rooms-II/cpp-0253/) | | |
| 254 | [Factor Combinations](https://leetcode.com/problems/factor-combinations/description/) | [无] | [C++](0001-0500/0254-Factor-Combinations/cpp-0254/) | | |
| | | | | | |
| 256 | [Paint House](https://leetcode.com/problems/paint-house/) | [无] | [C++](0001-0500/0256-Paint-House/cpp-0256/) | | |
| 257 | [Binary Tree Paths](https://leetcode.com/problems/binary-tree-paths/description/) | [solution](https://leetcode.com/problems/binary-tree-paths/solution/) | [C++](0001-0500/0257-Binary-Tree-Paths/cpp-0257/) | [Java](0001-0500/0257-Binary-Tree-Paths/java-0257/src/) | |
| 258 | [Add Digits](https://leetcode.com/problems/add-digits/) | [solution](https://leetcode.com/problems/add-digits/solution/) | [C++](0001-0500/0258-Add-Digits/cpp-0258/) | | |
| 259 | [3Sum Smaller](https://leetcode.com/problems/3sum-smaller/description/) | [solution](https://leetcode.com/problems/3sum-smaller/solution/) | [C++](0001-0500/0259-3Sum-Smaller/cpp-0259/) | | |
| 260 | [Single Number III](https://leetcode.com/problems/single-number-iii/) | [solution](https://leetcode.com/problems/single-number-iii/solution/) | [C++](0001-0500/0260-Single-Number-III/cpp-0260/) | | |
| 261 | [Graph Valid Tree](https://leetcode.com/problems/graph-valid-tree/) | [C++](0001-0500/0261-Graph-Valid-Tree/cpp-0261/) | | | |
| | | | | | |
| 263 | [Ugly Number](https://leetcode.com/problems/ugly-number/) | [无] | [C++](0001-0500/0263-Ugly-Number/cpp-0263/) | | |
| 264 | [Ugly Number II](https://leetcode.com/problems/ugly-number-ii/) | [solution](https://leetcode.com/problems/ugly-number-ii/solution/) | [C++](0001-0500/0264-Ugly-Number-II/cpp-0264/) | | |
| 265 | [Paint House II](https://leetcode.com/problems/paint-house-ii/) | [C++](0001-0500/0265-Paint-House-II/cpp-0265/) | | | |
| 266 | [Palindrome Permutation](https://leetcode.com/problems/palindrome-permutation/) | [solution](https://leetcode.com/problems/palindrome-permutation/solution/) | [C++](0001-0500/0266-Palindrome-Permutation/cpp-0266/) | | |
| 267 | [Palindrome Permutation II](https://leetcode.com/problems/palindrome-permutation-ii/) | [solution](https://leetcode.com/problems/palindrome-permutation-ii/solution/) | [C++](0001-0500/0267-Palindrome-Permutation-II/cpp-0267/) | | |
| 268 | [Missing Number](https://leetcode.com/problems/missing-number/description/) | [solution](https://leetcode.com/problems/missing-number/solution/) | [C++](0001-0500/0268-Missing-Number/cpp-0268/) | | |
| 269 | [Alien Dictionary](https://leetcode.com/problems/alien-dictionary/) | [solution](https://leetcode.com/problems/alien-dictionary/solution/) | [C++](0001-0500/0269-Alien-Dictionary/cpp-0269/) | | |
| | | | | | |
| 273 | [Integer to English Words](https://leetcode.com/problems/integer-to-english-words/) | [solution](https://leetcode.com/problems/integer-to-english-words/solution/) | [C++](0001-0500/0273-Integer-to-English-Words/cpp-0273/) | | |
| 274 | [H-Index](https://leetcode.com/problems/h-index/) | [solution](https://leetcode.com/problems/h-index/solution/)
[缺：非二分] | [C++](0001-0500/0274-H-Index/) | | |
| 275 | [H-Index II](https://leetcode.com/problems/h-index-ii/) | [solution](https://leetcode.com/problems/h-index-ii/solution/) | [C++](0001-0500/0275-H-Index-II/) | | |
| 276 | [Paint Fence](https://leetcode.com/problems/paint-fence/) | [solution](https://leetcode.com/problems/paint-fence/solution/) | [C++](0001-0500/0276-Paint-Fence/) | | |
| 277 | [Find the Celebrity](https://leetcode.com/problems/find-the-celebrity/) | [solution](https://leetcode.com/problems/find-the-celebrity/solution/)
[缺：O(n) 解法] | [C++](0001-0500/0277-Find-the-Celebrity/cpp-0277/) | | |
| 278 | [First Bad Version](https://leetcode.com/problems/first-bad-version/) | [solution](https://leetcode.com/problems/first-bad-version/solution/) | [C++](0001-0500/0278-First-Bad-Version/cpp-0278/) | | |
| 279 | [Perfect Squares](https://leetcode.com/problems/perfect-squares/description/) | [无]
四平方和数学解 | [C++](0001-0500/0279-Perfect-Squares/cpp-0279/) | [Java](0001-0500/0279-Perfect-Squares/java-0279/src/) | |
| 280 | [Wiggle Sort](https://leetcode.com/problems/wiggle-sort/description/) | [solution](https://leetcode.com/problems/wiggle-sort/solutions/2961467/wiggle-sort/?orderBy=most_votes) | [C++](0001-0500/0280-Wiggle-Sort/cpp-0280/) | | |
| | | | | | |
| 282 | [Expression Add Operators](https://leetcode.com/problems/expression-add-operators/description/) | [solution](https://leetcode.com/problems/expression-add-operators/solution/) | [C++](0001-0500/0282-Expression-Add-Operators/cpp-0282/) | | |
| 283 | [Move Zeroes](https://leetcode.com/problems/move-zeroes/description/) | [solution](https://leetcode.com/problems/move-zeroes/solution/) | [C++](0001-0500/0283-Move-Zeroes/cpp-0283/) | [Java](0001-0500/0283-Move-Zeroes/java-0283/src/) | |
| 284 | [Peeking Iterator](https://leetcode.com/problems/peeking-iterator/) | [solution](https://leetcode.com/problems/peeking-iterator/solution/) | [C++](0001-0500/0284-Peeking-Iterator/cpp-0284/) | | |
| 285 | [Inorder Successor in BST](https://leetcode.com/problems/inorder-successor-in-bst/) | [无]
[缺：空间O(h)] | [C++](0001-0500/0285-Inorder-Successor-in-BST/cpp-0285/) | | |
| 286 | [Walls and Gates](https://leetcode.com/problems/walls-and-gates/description/) | [solution](https://leetcode.com/problems/walls-and-gates/solution/) | [C++](0001-0500/0286-Walls-and-Gates/cpp-0286/) | | |
| 287 | [Find the Duplicate Number](https://leetcode.com/problems/find-the-duplicate-number/description/) | | [C++](0001-0500/0287-Find-the-Duplicate-Number/cpp-0287/) | | |
| 288 | [Unique Word Abbreviation](https://leetcode.com/problems/unique-word-abbreviation/description/) | [solution](https://leetcode.com/problems/unique-word-abbreviation/solution/) | [C++](0001-0500/0288-Unique-Word-Abbreviation/cpp-0288/) | | |
| 289 | [Game of Life](https://leetcode.com/problems/game-of-life/) | [solution](https://leetcode.com/problems/game-of-life/solution/) | [C++](0001-0500/0289-Game-of-Life/cpp-0289/) | | |
| 290 | [Word Pattern](https://leetcode.com/problems/word-pattern/description/) | [无] | [C++](0001-0500/0290-Word-Pattern/cpp-0290/) | | |
| | | | | | |
| 292 | [Nim Game](https://leetcode.com/problems/nim-game/) | [solution](https://leetcode.com/problems/nim-game/solution/) | [C++](0001-0500/0292-Nim-Game/cpp-0292/) | | |
| | | | | | |
| 295 | [Find Median from Data Stream](https://leetcode.com/problems/find-median-from-data-stream/) | [无] | [C++](0001-0500/0295-Find-Median-from-Data-Stream/cpp-0295/) | | |
| 296 | [Best Meeting Point](https://leetcode.com/problems/best-meeting-point/) | [solution](https://leetcode.com/problems/best-meeting-point/solution/) | [C++](0001-0500/0296-Best-Meeting-Point/cpp-0296/) | | |
| 297 | [Serialize and Deserialize Binary Tree](https://leetcode.com/problems/serialize-and-deserialize-binary-tree/description/) | [solution](https://leetcode.com/problems/serialize-and-deserialize-binary-tree/solution/) | [C++](0001-0500/0297-Serialize-and-Deserialize-Binary-Tree/cpp-0297/) | | |
| 298 | [Binary Tree Longest Consecutive Sequence](https://leetcode.com/problems/binary-tree-longest-consecutive-sequence/) | [solution](https://leetcode.com/problems/binary-tree-longest-consecutive-sequence/solution/) | [C++](0001-0500/0298-Binary-Tree-Longest-Consecutive-Sequence/cpp-0298/) | | |
| 299 | [Bulls and Cows](https://leetcode.com/problems/bulls-and-cows/) | [solution](https://leetcode.com/problems/bulls-and-cows/solution/) | [C++](0001-0500/0299-Bulls-and-Cows/cpp-0299/) | | |
| 300 | [Longest Increasing Subsequence](https://leetcode.com/problems/longest-increasing-subsequence/description/) | [solution](https://leetcode.com/problems/longest-increasing-subsequence/solution/) | [C++](0001-0500/0300-Longest-Increasing-Subsequence/cpp-0300/) | [Java](0001-0500/0300-Longest-Increasing-Subsequence/java-0300/src/) | |
| 301 | [0301-Remove-Invalid-Parentheses](https://leetcode.com/problems/remove-invalid-parentheses/) | [solution](https://leetcode.com/problems/remove-invalid-parentheses/solution/)
[缺：DP+构建] | [C++](0001-0500/0301-Remove-Invalid-Parentheses/cpp-0301/) | | |
| | | | | | |
| 303 | [Range Sum Query - Immutable](https://leetcode.com/problems/range-sum-query-immutable/description/) | | [C++](0001-0500/0303/Range-Sum-Query-Immutable/cpp-0303/) | | |
| 304 | [Range Sum Query 2D - Immutable](https://leetcode.com/problems/range-sum-query-2d-immutable/) | [solution](https://leetcode.com/problems/range-sum-query-2d-immutable/solution/) | [C++](0001-0500/0304-Range-Sum-Query-2D-Immutable/cpp-0304/) | | |
| 305 | [Number of Islands II](https://leetcode.com/problems/number-of-islands-ii/description/) | [solution](https://leetcode.com/problems/number-of-islands-ii/solutions/3033683/number-of-islands-ii/?orderBy=most_votes) | [C++](0001-0500/0305-Number-of-Islands-II/cpp-0305/) | | |
| 306 | [Additive Number](https://leetcode.com/problems/additive-number/) | [无] | [C++](0001-0500/0306-Additive-Number/cpp-0306/) | | |
| 307 | [Range Sum Query - Mutable](https://leetcode.com/problems/range-sum-query-mutable/description/) | [缺：BIT] | [C++](0001-0500/0307-Range-Sum-Query-Mutable/cpp-0307/) | | |
| 308 | [Range Sum Query 2D - Mutable](https://leetcode.com/problems/range-sum-query-2d-mutable/description/) | | [C++](0001-0500/0308-Range-Sum-Query-2D-Mutable/cpp-0308/) | | |
| 309 | [Best Time to Buy and Sell Stock with Cooldown](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/description/) | [solution](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/solution/) | [C++](0001-0500/0309-Best-Time-to-Buy-and-Sell-Stock-with-Cooldown/cpp-0309/) | | |
| 310 | [Minimum Height Trees](https://leetcode.com/problems/minimum-height-trees/) | [solution](https://leetcode.com/problems/minimum-height-trees/solution/) | [C++](0001-0500/0310-Minimum-Height-Trees/cpp-0310/) | | |
| 311 | [Sparse Matrix Multiplication](https://leetcode.com/problems/sparse-matrix-multiplication/) | [无] | [C++](0001-0500/0311-Sparse-Matrix-Multiplication/cpp-0311/) | | |
| 312 | [Burst Balloons](https://leetcode.com/problems/burst-balloons/) | [solution](https://leetcode.com/problems/burst-balloons/solution/) [题解](https://leetcode-cn.com/problems/burst-balloons/solution/chuo-qi-qiu-by-leetcode/) | [C++](0001-0500/0312-Burst-Balloons/cpp-0312/) | | |
| 313 | [Super Ugly Number](https://leetcode.com/problems/super-ugly-number/) | [无] | [C++](0001-0500/0313-Super-Ugly-Number/cpp-0313/) | | |
| 314 | [Binary Tree Vertical Order Traversal](https://leetcode.com/problems/binary-tree-vertical-order-traversal/) | [无] | [C++](0001-0500/0314-Binary-Tree-Vertical-Order-Traversal/cpp-0314/) | | |
| 315 | [Count of Smaller Numbers After Self](https://leetcode.com/problems/count-of-smaller-numbers-after-self/) | [无] | [C++](0001-0500/0315-Count-of-Smaller-Numbers-After-Self/cpp-0315/) | | |
| 316 | [Remove Duplicate Letters](https://leetcode.com/problems/remove-duplicate-letters/) | [solution](https://leetcode.com/problems/remove-duplicate-letters/solution/) | [C++](0001-0500/0316-Remove-Duplicate-Letters/cpp-0316/) | | |
| 317 | [Shortest Distance from All Buildings](https://leetcode.com/problems/shortest-distance-from-all-buildings/) | [solution](https://leetcode.com/problems/shortest-distance-from-all-buildings/solution/) | [C++](0001-0500/0317-Shortest-Distance-from-All-Buildings/cpp-0317/) | | |
| 318 | [Maximum Product of Word Lengths](https://leetcode.com/problems/maximum-product-of-word-lengths/) | [solution](https://leetcode.com/problems/maximum-product-of-word-lengths/solution/) | [C++](0001-0500/0318-Maximum-Product-of-Word-Lengths/cpp-0318/) | | |
| 319 | [Bulb Switcher](https://leetcode.com/problems/bulb-switcher/description/) | [无] | [C++](0001-0500/0319-Bulb-Switcher/cpp-0319/) | | |
| | | | | | |
| 321 | [Create Maximum Number](https://leetcode.com/problems/create-maximum-number/) | [无] | [C++](0001-0500/0321-Create-Maximum-Number/cpp-0321/) | | |
| 322 | [Coin Change](https://leetcode.com/problems/coin-change/description/) | [solution](https://leetcode.com/problems/coin-change/solution/) | [C++](0001-0500/0322-Coin-Change/cpp-0322/) | | |
| 323 | [Number of Connected Components in an Undirected Graph](https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/) | [solution](https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/solution/) | [C++](0001-0500/0323-Number-of-Connected-Components-in-an-Undirected-Graph/cpp-0323/) | | |
| 324 | [Wiggle Sort II](https://leetcode.com/problems/wiggle-sort-ii/) | [无] | [C++](0001-0500/0324-Wiggle-Sort-II/cpp-0324/) | | |
| 325 | [Maximum Size Subarray Sum Equals k](https://leetcode.com/problems/maximum-size-subarray-sum-equals-k/) | [solution](https://leetcode.com/problems/maximum-size-subarray-sum-equals-k/solution/) | [C++](0001-0500/0325-Maximum-Size-Subarray-Sum-Equals-k/cpp-0325/) | | |
| 326 | [Power of Three](https://leetcode.com/problems/power-of-three/) | [solution](https://leetcode.com/problems/power-of-three/solution/) | [C++](0001-0500/0326-Power-of-Three/cpp-0326/) | | |
| | | | | | |
| 328 | [Odd Even Linked List](https://leetcode.com/problems/odd-even-linked-list/description/) | [solution](https://leetcode.com/problems/odd-even-linked-list/solution/) | [C++](0001-0500/0328-Odd-Even-Linked-List/cpp-0328/) | | |
| 329 | [Longest Increasing Path in a Matrix](https://leetcode.com/problems/longest-increasing-path-in-a-matrix/) | [solution](https://leetcode.com/problems/longest-increasing-path-in-a-matrix/solution/) | [C++](0001-0500/0329-Longest-Increasing-Path-in-a-Matrix/cpp-0329/) | | |
| 330 | [Patching Array](https://leetcode.com/problems/patching-array/) | [无] | [C++](0001-0500/0330-Patching-Array/cpp-0330/) | | |
| 331 | [Verify Preorder Serialization of a Binary Tree](https://leetcode.com/problems/verify-preorder-serialization-of-a-binary-tree/) | [solution](https://leetcode.com/problems/verify-preorder-serialization-of-a-binary-tree/solution/) | [C++](0001-0500/0331-Verify-Preorder-Serialization-of-a-Binary-Tree/cpp-0331/) | | |
| 332 | [Reconstruct Itinerary](https://leetcode.com/problems/reconstruct-itinerary/) | [solution](https://leetcode.com/problems/reconstruct-itinerary/solution/) | [C++](0001-0500/0332-Reconstruct-Itinerary/cpp-0332/) | | |
| | | | | | |
| 334 | [Increasing Triplet Subsequence](https://leetcode.com/problems/increasing-triplet-subsequence/) | [solution](https://leetcode.com/problems/increasing-triplet-subsequence/solution/) | [C++](0001-0500/0334-Increasing-Triplet-Subsequence/cpp-0334/) | | |
| 335 | [Self Crossing](https://leetcode.com/problems/self-crossing/) | [无] | [C++](0001-0500/0335-Self-Crossing/cpp-0335/) | | |
| 336 | [Palindrome Pairs](https://leetcode.com/problems/palindrome-pairs/) | [solution](https://leetcode.com/problems/palindrome-pairs/solution/) | [C++](0001-0500/0336-Palindrome-Pairs/cpp-0336/)| | |
| 337 | [House Robber III](https://leetcode.com/problems/house-robber-iii/description/) | [无] | [C++](0001-0500/0337-House-Robber-III/cpp-0337/) | | |
| 338 | [Counting Bits](https://leetcode.com/problems/counting-bits/) | [solution](https://leetcode.com/problems/counting-bits/solution/) | [C++](0001-0500/0338-Counting-Bits/cpp-0338/) | | |
| 339 | [Nested List Weight Sum](https://leetcode.com/problems/nested-list-weight-sum/) | [无] | [C++](0001-0500/0339-Nested-List-Weight-Sum/cpp-0339/) | | |
| 340 | [Longest Substring with At Most K Distinct Characters](https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters/) | [solution](https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters/solution/) | [C++](0001-0500/0340-Longest-Substring-with-At-Most-K-Distinct-Characters/cpp-0340/) | | |
| 341 | [Flatten Nested List Iterator](https://leetcode.com/problems/flatten-nested-list-iterator/) | [无] | [C++](0001-0500/0341-Flatten-Nested-List-Iterator/cpp-0341/) | | |
| 342 | [Power of Four](https://leetcode.com/problems/power-of-four/) | [solution](https://leetcode.com/problems/power-of-four/solution/) | [C++](0001-0500/0342-Power-of-Four/cpp-0342/) | | |
| 343 | [Integer Break](https://leetcode.com/problems/integer-break/description/) | [无] | [C++](0001-0500/0343-Integer-Break/cpp-0343/) | [Java](0001-0500/0343-Integer-Break/java-0343/src/) | |
| 344 | [Reverse String](https://leetcode.com/problems/reverse-string/description/) | [无] | [C++](0001-0500/0344-Reverse-String/cpp-0344/) | | |
| 345 | [Reverse Vowels of a String](https://leetcode.com/problems/reverse-vowels-of-a-string/description/) | [无] | [C++](0001-0500/0345-Reverse-Vowels-of-a-String/cpp-0345/) | | |
| 346 | [Moving Average from Data Stream](https://leetcode.com/problems/moving-average-from-data-stream/solution/) | [无] | [C++](0001-0500/0346-Moving-Average-from-Data-Stream/cpp-0346/) | | |
| 347 | [Top K Frequent Elements](https://leetcode.com/problems/top-k-frequent-elements/description/) | [solution](https://leetcode.com/problems/top-k-frequent-elements/solution/) | [C++](0001-0500/0347-Top-K-Frequent-Elements/cpp-0347/) | [Java](0001-0500/0347-Top-K-Frequent-Elements/java-0347/src/) | |
| 348 | [Find Winner on a Tic Tac Toe Game](https://leetcode.com/problems/find-winner-on-a-tic-tac-toe-game/) | [无] | [C++](0001-0500/0348-Find-Winner-on-a-Tic-Tac-Toe-Game/cpp-0348/) | | |
| 349 | [Intersection of Two Arrays](https://leetcode.com/problems/intersection-of-two-arrays/description/) | [solution](https://leetcode.com/problems/intersection-of-two-arrays/solution/) | [C++](0001-0500/0349-Intersection-of-Two-Arrays/cpp-0349/) | [Java](0001-0500/0349-Intersection-of-Two-Arrays/java-0349/src/) | |
| 350 | [Intersection of Two Arrays II](https://leetcode.com/problems/intersection-of-two-arrays-ii/description/) | [无] | [C++](0001-0500/0350-Intersection-of-Two-Arrays-II/cpp-0350/) | [Java](0001-0500/0350-Intersection-of-Two-Arrays-II/java-0350/src/) | |
| | | | | | |
| 352 | [Data Stream as Disjoint Intervals](https://leetcode.com/problems/data-stream-as-disjoint-intervals/) | [无] | [C++](0001-0500/0352-Data-Stream-as-Disjoint-Intervals/cpp-0352/) | | |
| | | | | | |
| 354 | [Russian Doll Envelopes](https://leetcode.com/problems/russian-doll-envelopes/) | [solution](https://leetcode.com/problems/russian-doll-envelopes/solution/) | [C++](0001-0500/0354-Russian-Doll-Envelopes/cpp-0354/) | | |
| | | | | | |
| 357 | [Count Numbers with Unique Digits](https://leetcode.com/problems/count-numbers-with-unique-digits/) | [无] | [C++](0001-0500/0357-Count-Numbers-with-Unique-Digits/cpp-0357/) | | |
| | | | | | |
| 359 | [Logger Rate Limiter](https://leetcode.com/problems/logger-rate-limiter/description/) | [无] | [C++](0001-0500/0359-Logger-Rate-Limiter/cpp-0359/) | | |
| 360 | [Sort Transformed Array](https://leetcode.com/problems/sort-transformed-array/description/) | [无] | [C++](0001-0500/0360-Sort-Transformed-Array/cpp-0360/) | | |
| | | | | | |
| 362 | [Design Hit Counter](https://leetcode.com/problems/design-hit-counter/) | [无] | [C++](0001-0500/0362-Design-Hit-Counter/cpp-0362/) | | |
| 363 | [Max Sum of Rectangle No Larger Than K](https://leetcode.com/problems/max-sum-of-rectangle-no-larger-than-k/) | [无] | [C++](0001-0500/0363-Max-Sum-of-Rectangle-No-Larger-Than-K/cpp-0363/) | | |
| 364 | [Nested List Weight Sum II](https://leetcode.com/problems/nested-list-weight-sum-ii/) | [无] | [C++](0001-0500/0364-Nested-List-Weight-Sum-II/cpp-0364/) | | |
| 365 | [Water and Jug Problem](https://leetcode.com/problems/water-and-jug-problem/) | [题解](https://leetcode-cn.com/problems/water-and-jug-problem/solution/shui-hu-wen-ti-by-leetcode-solution/)
[缺：数学解法] | [C++](0001-0500/0365-Water-and-Jug-Problem/cpp-0365/) | | |
| 366 | [Find Leaves of Binary Tree](https://leetcode.com/problems/find-leaves-of-binary-tree/) | [solution](https://leetcode.com/problems/find-leaves-of-binary-tree/solution/) | [C++](0001-0500/0366-Find-Leaves-of-Binary-Tree/cpp-0366/) | | |
| 367 | [Valid Perfect Square](https://leetcode.com/problems/valid-perfect-square/) | [solution](https://leetcode.com/problems/valid-perfect-square/solution/) | [C++](0001-0500/0367-Valid-Perfect-Square/cpp-0367/) | | |
| 368 | [Largest Divisible Subset](https://leetcode.com/problems/largest-divisible-subset/) | [solution](https://leetcode.com/problems/largest-divisible-subset/solution/) | [C++](0001-0500/0368-Largest-Divisible-Subset/cpp-0368/) | | |
| 369 | [Plus One Linked List](https://leetcode.com/problems/plus-one-linked-list/) | [solution](https://leetcode.com/problems/plus-one-linked-list/solution/) | [C++](0001-0500/0369-Plus-One-Linked-List/cpp-0369/) | | |
| 370 | [Range Addition](https://leetcode.com/problems/range-addition/description/) | | [C++](0001-0500/0370-Range-Addition/cpp-0370/) | | |
| | | | | | |
| 372 | [Super Pow](https://leetcode.com/problems/super-pow/) | [无] | [C++](0001-0500/0372-Super-Pow/cpp-0372/) | | |
| 373 | [Find K Pairs with Smallest Sums](https://leetcode.com/problems/find-k-pairs-with-smallest-sums/) | [无] | [C++](0001-0500/0373-Find-K-Pairs-with-Smallest-Sums/cpp-0373/) | | |
| 374 | [Guess Number Higher or Lower](https://leetcode.com/problems/guess-number-higher-or-lower/description/) | [solution](https://leetcode.com/problems/guess-number-higher-or-lower/solution/) | [C++](0001-0500/0374-Guess-Number-Higher-or-Lower/cpp-0374/) | | |
| 375 | [Guess Number Higher or Lower II](https://leetcode.com/problems/guess-number-higher-or-lower-ii/) | [无] | [C++](0001-0500/0375-Guess-Number-Higher-or-Lower-II/cpp-0375/) | | |
| 376 | [Wiggle Subsequence](https://leetcode.com/problems/wiggle-subsequence/) | [solution](https://leetcode.com/problems/wiggle-subsequence/solution/) | [C++](0001-0500/0376-Wiggle-Subsequence/cpp-0376/)
[缺：DP；O(1) 空间贪心] | | |
| 377 | [Combination Sum IV](https://leetcode.com/problems/combination-sum-iv/description/) | [无] | [C++](0001-0500/0377-Combination-Sum-IV/cpp-0377/) | | |
| 378 | [Kth Smallest Element in a Sorted Matrix](https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/) | [无] | [C++](0001-0500/0378-Kth-Smallest-Element-in-a-Sorted-Matrix/cpp-0378/) | | |
| | | | | | |
| 380 | [Insert Delete GetRandom O(1)](https://leetcode.com/problems/insert-delete-getrandom-o1/description/) | [无] | [C++](0001-0500/0380-Insert-Delete-GetRandom-O(1)/cpp-0380/) | | |
| 381 | [Insert Delete GetRandom O(1) - Duplicates allowed](https://leetcode.com/problems/insert-delete-getrandom-o1-duplicates-allowed/description/) | [无] | [C++](0001-0500/0381-Insert-Delete-GetRandom-O(1)-Duplicates-allowed/cpp-0381/) | | |
| 382 | [Linked List Random Node](https://leetcode.com/problems/linked-list-random-node/description/) | [无] | [C++](0001-0500/0382-Linked-List-Random-Node/cpp-0382/) | | |
| 383 | [Ransom Note](https://leetcode.com/problems/ransom-note/) | [solution](https://leetcode.com/problems/ransom-note/solution/) | [C++](0001-0500/0383-Ransom-Note/cpp-0383/) | | |
| 384 | [Shuffle an Array](https://leetcode.com/problems/shuffle-an-array/description/) | [solution](https://leetcode.com/problems/shuffle-an-array/solution/) | [C++](0001-0500/0384-Shuffle-an-Array/cpp-0384/) | | |
| 385 | [Mini Parser](https://leetcode.com/problems/mini-parser/) | [无] | [C++](0001-0500/0385-Mini-Parser/cpp-0385/) | | |
| 386 | [Lexicographical Numbers](https://leetcode.com/problems/lexicographical-numbers/description/) | | [C++](0001-0500/0386-Lexicographical-Numbers/cpp-0386/) | | |
| 387 | [First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/description/) | [solution](https://leetcode.com/problems/first-unique-character-in-a-string/solution/) | [C++](0001-0500/0387-First-Unique-Character-in-a-String/cpp-0387/) | [Java](0001-0500/0387-First-Unique-Character-in-a-String/java-0387/src/) | |
| 388 | [Longest Absolute File Path](https://leetcode.com/problems/longest-absolute-file-path/description/) | | [C++](0001-0500/0388-Longest-Absolute-File-Path/cpp-0388/) | | |
| 389 | [Find the Difference](https://leetcode.com/problems/find-the-difference/description/) | | [C++](0001-0500/0389-Find-the-Difference/cpp-0389/) | | |
| 390 | [Elimination Game](https://leetcode.com/problems/elimination-game/description/) | | [C++](0001-0500/0390-Elimination-Game/cpp-0390/) | | |
| 391 | [Perfect Rectangle](https://leetcode.com/problems/perfect-rectangle/description/) | [缺：矩形求交] | [C++](0001-0500/0391-Perfect-Rectangle/cpp-0391/) | | |
| 392 | [Is Subsequence](https://leetcode.com/problems/is-subsequence/) | [无] | [C++](0001-0500/0392-Is-Subsequence/cpp-0392/) | | |
| 393 | [UTF-8 Validation](https://leetcode.com/problems/utf-8-validation/) | [solution](https://leetcode.com/problems/utf-8-validation/solution/) | [C++](0001-0500/0393-UTF-8-Validation/cpp-0393/) | | |
| 394 | [Decode String](https://leetcode.com/problems/decode-string/description/) | [无] | [C++](0001-0500/0394-Decode-String/cpp-0394/) | | |
| 395 | [Longest Substring with At Least K Repeating Characters](https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/) | [solution](https://leetcode.com/problems/longest-substring-with-at-least-k-repeating-characters/solution/)
[缺：滑动窗口] | [C++](0001-0500/0395-Longest-Substring-with-At-Least-K-Repeating-Characters/cpp-0395/) | | |
| 396 | [Rotate Function](https://leetcode.com/problems/rotate-function/) | [无] | [C++](0001-0500/0396-Rotate-Function/cpp-0396/) | | |
| 397 | [Integer Replacement](https://leetcode.com/problems/integer-replacement/) | [无] | [C++](0001-0500/0397-Integer-Replacement/cpp-0397/) | | |
| 398 | [Random Pick Index](https://leetcode.com/problems/random-pick-index/description/) | [无] | [C++](0001-0500/0398-Random-Pick-Index/cpp-0398/) | | |
| 399 | [Evaluate Division](https://leetcode.com/problems/evaluate-division/) | [solution](https://leetcode.com/problems/evaluate-division/solution/)
[缺：UF] | [C++](0001-0500/0399-Evaluate-Division/cpp-0399/) | | |
| 400 | [Nth Digit](https://leetcode.com/problems/nth-digit/) | [无] | [C++](0001-0500/0400-Nth-Digit/cpp-0400/) | | |
| 401 | [Binary Watch](https://leetcode.com/problems/binary-watch/) | [无] | [C++](0001-0500/0401-Binary-Watch/cpp-0401/) | | |
| 402 | [Remove K Digits](https://leetcode.com/problems/remove-k-digits/) | [solution](https://leetcode.com/problems/remove-k-digits/solution/) [题解](https://leetcode-cn.com/problems/remove-k-digits/solution/yi-diao-kwei-shu-zi-by-leetcode/) | [C++](0001-0500/0402-Remove-K-Digits/cpp-0402/) | | |
| 403 | [Frog Jump](https://leetcode.com/problems/Frog-Jump/) | [solution](https://leetcode.com/problems/Frog-Jump/)
[缺：dp] | [C++](0001-0500/0403-Frog-Jump/cpp-0403/) | | |
| 404 | [Sum of Left Leaves](https://leetcode.com/problems/sum-of-left-leaves/) | [无] | [C++](0001-0500/0404-Sum-of-Left-Leaves/cpp-0404/) | | |
| 405 | [Convert a Number to Hexadecimal](https://leetcode.com/problems/convert-a-number-to-hexadecimal/) | [无] | [C++](0001-0500/0405-Convert-a-Number-to-Hexadecimal/cpp-0405/) | | |
| 406 | [Queue Reconstruction by Height](https://leetcode.com/problems/queue-reconstruction-by-height/) | [无] | [C++](0001-0500/0406-Queue-Reconstruction-by-Height/cpp-0406/) | | |
| 407 | [Trapping Rain Water II](https://leetcode.com/problems/trapping-rain-water-ii/) | [无] | [C++](0001-0500/0407-Trapping-Rain-Water-II/cpp-0407/) | | |
| | | | | | |
| 410 | [Split Array Largest Sum](https://leetcode.com/problems/split-array-largest-sum/) | [solution](https://leetcode.com/problems/split-array-largest-sum/solution/) [题解](https://leetcode-cn.com/problems/split-array-largest-sum/solution/fen-ge-shu-zu-de-zui-da-zhi-by-leetcode/) | [C++](0001-0500/410-Split-Array-Largest-Sum/cpp-410/) | | |
| | | | | | |
| 412 | [Fizz Buzz](https://leetcode.com/problems/fizz-buzz/description/) | [solution](https://leetcode.com/problems/fizz-buzz/solution/) | [C++](0001-0500/0412-Fizz-Buzz/cpp-0412/) | | |
| 413 | [Arithmetic Slices](https://leetcode.com/problems/arithmetic-slices/) | [solution](https://leetcode.com/problems/arithmetic-slices/solution/) | [C++](0001-0500/0413-Arithmetic-Slices/cpp-0413/) | | |
| 414 | [Third Maximum Number](https://leetcode.com/problems/third-maximum-number/) | [无] | [C++](0001-0500/0414-Third-Maximum-Number/cpp-0414/) | | |
| 415 | [Add Strings](https://leetcode.com/problems/add-strings/) | [solution](https://leetcode.com/problems/add-strings/solution/) | [C++](0001-0500/0415-Add-Strings/cpp-0415/) | | |
| 416 | [Partition Equal Subset Sum](https://leetcode.com/problems/partition-equal-subset-sum/description/) | [无] | [C++](0001-0500/0416-Partition-Equal-Subset-Sum/cpp-0416/) | [Java](0001-0500/0416-Partition-Equal-Subset-Sum/java-0416/src/) | |
| 417 | [Pacific Atlantic Water Flow](https://leetcode.com/problems/pacific-atlantic-water-flow/description/) | | [C++](0001-0500/0417-Pacific-Atlantic-Water-Flow/cpp-0417/) | [Java](0001-0500/0417-Pacific-Atlantic-Water-Flow/java-0417/src/) | |
| | | | | | |
| 419 | [Battleships in a Board](https://leetcode.com/problems/battleships-in-a-board/) | [无] | [C++](0001-0500/0419-Battleships-in-a-Board/cpp-0419/) | | |
| 420 | [Strong Password Checker](https://leetcode.com/problems/strong-password-checker/) | [无] | [C++](0001-0500/0420-Strong-Password-Checker/cpp-0420/) | | |
| 421 | [Maximum XOR of Two Numbers in an Array](https://leetcode.com/problems/maximum-xor-of-two-numbers-in-an-array/) | [solution](https://leetcode.com/problems/maximum-xor-of-two-numbers-in-an-array/solution/) | [C++](0001-0500/0421-Maximum-XOR-of-Two-Numbers-in-an-Array/cpp-0421/) | | |
| 422 | [Valid Word Square](https://leetcode.com/problems/valid-word-square/description/) | [无] | [C++](0001-0500/0422-Valid-Word-Square/cpp-0422/) | | |
| 423 | [Reconstruct Original Digits from English](https://leetcode.com/problems/reconstruct-original-digits-from-english/) | [solution](https://leetcode.com/problems/reconstruct-original-digits-from-english/solution/) | [C++](0001-0500/0423-Reconstruct-Original-Digits-from-English/cpp-0423/) | | |
| 424 | [Longest Repeating Character Replacement](https://leetcode.com/problems/longest-repeating-character-replacement/) | [无] | [C++](0001-0500/0424-Longest-Repeating-Character-Replacement/cpp-0424/) | | |
| | | | | | |
| 426 | [Convert Binary Search Tree to Sorted Doubly Linked List](https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/) | [solution](https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list/solution/) | [C++](0001-0500/0426-Convert-Binary-Search-Tree-to-Sorted-Doubly-Linked-List/cpp-0426/) | | |
| 427 | [Construct Quad Tree](https://leetcode.com/problems/construct-quad-tree/) | [无] | [C++](0001-0500/0427-Construct-Quad-Tree/cpp-0427/) | | |
| | | | | | |
| 429 | [N-ary Tree Level Order Traversal](https://leetcode.com/problems/n-ary-tree-level-order-traversal/) | [无] | [C++](0001-0500/0429-N-ary-Tree-Level-Order-Traversal/cpp-0429/) | | |
| 430 | [Flatten a Multilevel Doubly Linked List](https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list/description/) | [无] | [C++](0001-0500/0430-Flatten-a-Multilevel-Doubly-Linked-List/cpp-0430/) | | |
| 431 | [Encode N-ary Tree to Binary Tree](https://leetcode.com/problems/encode-n-ary-tree-to-binary-tree/) | [solution](https://leetcode.com/problems/encode-n-ary-tree-to-binary-tree/solution/) | [C++](0001-0500/0431-Encode-N-ary-Tree-to-Binary-Tree/cpp-0431/) | | |
| 432 | [All O one Data Structure](https://leetcode.com/problems/all-oone-data-structure/) | [无] [缺：O(1)] | [C++](0001-0500/0432-All-O-one-Data-Structure/cpp-0432/) | | |
| 433 | [Minimum Genetic Mutation](https://leetcode.com/problems/minimum-genetic-mutation/) | [无] | [C++](0001-0500/0433-Minimum-Genetic-Mutation/cpp-0433/) | | |
| 434 | [Number of Segments in a String](https://leetcode.com/problems/number-of-segments-in-a-string/description/) | [无] | [C++](0001-0500/0434-Number-of-Segments-in-a-String/cpp-0434/) | | |
| 435 | [Non-overlapping Intervals](https://leetcode.com/problems/non-overlapping-intervals/description/) | [solution](https://leetcode.com/problems/non-overlapping-intervals/solution/) | [C++](0001-0500/0435-Non-overlapping-Intervals/cpp-0435/) | [Java](0001-0500/0435-Non-overlapping-Intervals/java-0435/src/) | |
| 436 | [Find Right Interval](https://leetcode.com/problems/find-right-interval/) | [无] | [C++](0001-0500/0436-Find-Right-Interval/cpp-0436/) | | |
| 437 | [Path Sum III](https://leetcode.com/problems/path-sum-iii/description/) | [无] | [C++](0001-0500/0437-Path-Sum-III/cpp-0437/) | [Java](0001-0500/0437-Path-Sum-III/java-0437/src/) | |
| 438 | [Find All Anagrams in a String](https://leetcode.com/problems/find-all-anagrams-in-a-string/description/) | [无] | [C++](0001-0500/0438-Find-All-Anagrams-in-a-String/cpp-0438/) | | |
| 439 | [Ternary Expression Parser](https://leetcode.com/problems/ternary-expression-parser/) | [无] | [C++](0001-0500/0439-Ternary-Expression-Parser/cpp-0439/) | | |
| 440 | [K-th Smallest in Lexicographical Order](https://leetcode.com/problems/k-th-smallest-in-lexicographical-order/) | [无] [缺：更简单的实现] | [C++](0001-0500/0440-K-th-Smallest-in-Lexicographical-Order/cpp-0440/) | | |
| 441 | [Arranging Coins](https://leetcode.com/problems/arranging-coins/) | [solution](https://leetcode.com/problems/arranging-coins/solution/) | [C++](0001-0500/0441-Arranging-Coins/cpp-0441/) | | |
| 442 | [Find All Duplicates in an Array](https://leetcode.com/problems/find-all-duplicates-in-an-array/) | [solution](https://leetcode.com/problems/find-all-duplicates-in-an-array/solution/) | [C++](0001-0500/0442-Find-All-Duplicates-in-an-Array/cpp-0442/) | | |
| 443 | [String Compression](https://leetcode.com/problems/string-compression/description/) | | [C++](0001-0500/0443-String-Compression/cpp-0443/) | | |
| 444 | [Sequence Reconstruction](https://leetcode.com/problems/sequence-reconstruction/) | [无] | [C++](0001-0500/0444-Sequence-Reconstruction/cpp-0444/) | | |
| 445 | [Add Two Numbers II](https://leetcode.com/problems/add-two-numbers-ii/) | [无] | [C++](0001-0500/0445-Add-Two-Numbers-II/cpp-0445/) | | |
| 446 | [Arithmetic Slices II - Subsequence](https://leetcode.com/problems/arithmetic-slices-ii-subsequence/) | [solution](https://leetcode.com/problems/arithmetic-slices-ii-subsequence/solution/) | [C++](0001-0500/0446-Arithmetic-Slices-II-Subsequence/cpp-0446/) | | |
| 447 | [Number of Boomerangs](https://leetcode.com/problems/number-of-boomerangs/description/) | [无] | [C++](0001-0500/0447-Number-of-Boomerangs/cpp-0447/) | [Java](0001-0500/0447-Number-of-Boomerangs/java-0447/src/) | |
| 448 | [Find All Numbers Disappeared in an Array](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/) | [solution](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/solution/) | [C++](0001-0500/0448-Find-All-Numbers-Disappeared-in-an-Array/cpp-0448/) | | |
| 449 | [Serialize and Deserialize BST](https://leetcode.com/problems/serialize-and-deserialize-bst/) | [solution](https://leetcode.com/problems/serialize-and-deserialize-bst/solution/) | [C++](0001-0500/0449-Serialize-and-Deserialize-BST/cpp-0449/) | | |
| 450 | [Delete Node in a BST](https://leetcode.com/problems/delete-node-in-a-bst/) | [solution](https://leetcode.com/problems/delete-node-in-a-bst/solution/) | [C++](0001-0500/0450-Delete-Node-in-a-BST/cpp-0450/) | | |
| 451 | [Sort Characters By Frequency](https://leetcode.com/problems/sort-characters-by-frequency/description/) | [无] | [C++](0001-0500/0451-Sort-Characters-By-Frequency/cpp-0451/) | [Java](0001-0500/0451-Sort-Characters-By-Frequency/java-0451/) | |
| 452 | [Minimum Number of Arrows to Burst Balloons](https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/) | [solution](https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/solution/) | [C++](0001-0500/0452-Minimum-Number-of-Arrows-to-Burst-Balloons/cpp-0452/) | | |
| 453 | [Minimum Moves to Equal Array Elements](https://leetcode.com/problems/minimum-moves-to-equal-array-elements/) | [solution](https://leetcode.com/problems/minimum-moves-to-equal-array-elements/solution/) | [C++](0001-0500/0453-Minimum-Moves-to-Equal-Array-Elements/cpp-0453/) | | |
| 454 | [4Sum II](https://leetcode.com/problems/4sum-ii/description/) | [无] | [C++](0001-0500/0454-4Sum-II/cpp-0454/) | [Java](0001-0500/0454-4Sum-II/java-0454/src/) | |
| 455 | [Assign Cookies](https://leetcode.com/problems/assign-cookies/description/) | [无] | [C++](0001-0500/0455-Assign-Cookies/cpp-0455/) | [Java](0001-0500/0455-Assign-Cookies/java-0455/src/) | |
| 456 | [132 Pattern](https://leetcode.com/problems/132-pattern/) | [solution](https://leetcode.com/problems/132-pattern/solution/)
[缺：O(n) 单调栈算法] | [C++](0001-0500/0456-132-Pattern/cpp-0456/) | | |
| 457 | [Circular Array Loop](https://leetcode.com/problems/circular-array-loop/) | [无] | [C++](0001-0500/0457-Circular-Array-Loop/cpp-0457/) | | |
| 458 | [Poor Pigs](https://leetcode.com/problems/poor-pigs/) | [solution](https://leetcode.com/problems/poor-pigs/solution/) | [C++](0001-0500/0458-Poor-Pigs/) | | |
| 459 | [Repeated Substring Pattern](https://leetcode.com/problems/repeated-substring-pattern/description/) | [无] | [C++](0001-0500/0459-Repeated-Substring-Pattern/cpp-0459/) | | |
| 460 | [LFU Cache](https://leetcode.com/problems/lfu-cache/description/) | [solution](https://leetcode.com/problems/lfu-cache/solutions/2815229/lfu-cache/?orderBy=most_votes) | [C++](0001-0500/0460-LFU-Cache/) | | |
| 461 | [Hamming Distance](https://leetcode.com/problems/hamming-distance/) | [solution](https://leetcode.com/problems/hamming-distance/solution/) | [C++](0001-0500/0461-Hamming-Distance/cpp-0461/) | | |
| 462 | [Minimum Moves to Equal Array Elements II](https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/) | [solution](https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/solution/) | [C++](0001-0500/0462-Minimum-Moves-to-Equal-Array-Elements-II/cpp-0462/) | | |
| 463 | [Island Perimeter](https://leetcode.com/problems/island-perimeter/) | [solution](https://leetcode.com/problems/island-perimeter/solution/) | [C++](0001-0500/0463-Island-Perimeter/cpp-0463/) | | |
| 464 | [Can I Win](https://leetcode.com/problems/can-i-win/) | [无] | [C++](0001-0500/0464-Can-I-Win/cpp-0464/) | | |
| | | | | | |
| 467 | [Unique Substrings in Wraparound String](https://leetcode.com/problems/unique-substrings-in-wraparound-string/) | [无] | [C++](0001-0500/0467-Unique-Substrings-in-Wraparound-String/cpp-0467/) | | |
| 468 | [Validate IP Address](https://leetcode.com/problems/validate-ip-address/) | [无] | [C++](0001-0500/0468-Validate-IP-Address/cpp-0468/) | | |
| | | | | | |
| 470 | [Implement Rand10() Using Rand7()](https://leetcode.com/problems/implement-rand10-using-rand7/description/) | [solution](https://leetcode.com/problems/implement-rand10-using-rand7/solution/) | [C++](0001-0500/0470-Implement-Rand10-Using-Rand7/cpp-0470/) | | |
| | | | | | |
| 472 | [Concatenated Words](https://leetcode.com/problems/concatenated-words/) | [无] | [C++](0001-0500/0472-Matchsticks-to-Square/cpp-0472/) | | |
| 473 | [Matchsticks to Square](https://leetcode.com/problems/matchsticks-to-square/description/) | [solution](https://leetcode.com/problems/matchsticks-to-square/solution/) | [C++](0001-0500/0473-Matchsticks-to-Square/cpp-0473/) | | |
| 474 | [Ones and Zeroes](https://leetcode.com/problems/ones-and-zeroes/description/) | [solution](https://leetcode.com/problems/ones-and-zeroes/solution/) | [C++](0001-0500/0474-Ones-and-Zeroes/cpp-0474/) | | |
| 475 | [Heaters](https://leetcode.com/problems/heaters/) | [无] | [C++](0001-0500/0475-Heaters/cpp-0475/) | | |
| 476 | [Number Complement](https://leetcode.com/problems/number-complement/) | [solution](https://leetcode.com/problems/number-complement/solution/) | [C++](0001-0500/0476-Number-Complement/cpp-0476/) | | |
| 477 | [Total Hamming Distance](https://leetcode.com/problems/total-hamming-distance/) | [solution](https://leetcode.com/problems/total-hamming-distance/solution/) [题解](https://leetcode-cn.com/problems/total-hamming-distance/solution/yi-ming-ju-chi-zong-he-by-leetcode/) | [C++](0001-0500/477-Total-Hamming-Distance/cpp-477/) | | |
| 478 | [Generate Random Point in a Circle](https://leetcode.com/problems/generate-random-point-in-a-circle/description/) | [solution](https://leetcode.com/problems/generate-random-point-in-a-circle/solution/) | [C++](0001-0500/0478-Generate-Random-Point-in-a-Circle/cpp-0478/) | | |
| 479 | [Largest Palindrome Product](https://leetcode.com/problems/largest-palindrome-product/) | [无] | [C++](0001-0500/0479-Largest-Palindrome-Product/cpp-0479/) | | |
| 480 | [Sliding Window Median](https://leetcode.com/problems/sliding-window-median/) | [无]
[缺：双数据结构] | [C++](0001-0500/0480-Sliding-Window-Median/cpp-0480/) | | |
| 481 | [Magical String](https://leetcode.com/problems/magical-string/) | [无] | [C++](0001-0500/0481-Magical-String/cpp-0481/) | | |
| 482 | [License Key Formatting](https://leetcode.com/problems/license-key-formatting/) | [无] | [C++](0001-0500/0482-License-Key-Formatting/cpp-0482/) | | |
| 483 | [Smallest Good Base](https://leetcode.com/problems/smallest-good-base/) | [无] | [C++](0001-0500/0483-Smallest-Good-Base/cpp-0483/) | | |
| 484 | [Find Permutation](https://leetcode.com/problems/find-permutation/) | [solution](https://leetcode.com/problems/find-permutation/solution/) | [C++](0001-0500/0484-Find-Permutation/cpp-0484/) | | |
| 485 | [Max Consecutive Ones](https://leetcode.com/problems/max-consecutive-ones/description/) | [无] | [C++](0001-0500/0485-Max-Consecutive-Ones/cpp-0485/) | | |
| 486 | [Predict the Winner](https://leetcode.com/problems/predict-the-winner/) | [无] | [C++](0001-0500/0486-Predict-the-Winner/cpp-0486/) | | |
| 487 | [Max Consecutive Ones II](https://leetcode.com/problems/max-consecutive-ones-ii/) | [无] | [C++](0001-0500/0487-Max-Consecutive-Ones-II/cpp-0487/) | | |
| 488 | [Zuma Game](https://leetcode.com/problems/zuma-game/) | [无] | [C++](0001-0500/0488-Zuma-Game/cpp-0488/) | | |
| 489 | [Robot Room Cleaner](https://leetcode.com/problems/robot-room-cleaner/) | [solution](https://leetcode.com/problems/robot-room-cleaner/solution/) | [C++](0001-0500/0489-Robot-Room-Cleaner/cpp-0489/) | | |
| 490 | [The Maze](https://leetcode.com/problems/the-maze/description/) | [solution](https://leetcode.com/problems/the-maze/solution/) | [C++](0001-0500/0490-The-Maze/cpp-0490/) | | |
| 491 | [Non-decreasing Subsequences](https://leetcode.com/problems/non-decreasing-subsequences/description/) | [无] | [C++](0001-0500/0491-Non-decreasing-Subsequences/cpp-0491/) | | |
| 492 | [Construct the Rectangle](https://leetcode.com/problems/construct-the-rectangle/) | [无] | [C++](0001-0500/0492-Construct-the-Rectangle/cpp-0492/) | | |
| | | | | | |
| 494 | [Target Sum](https://leetcode.com/problems/target-sum/description/) | [solution](https://leetcode.com/problems/target-sum/solution/) | [C++](0001-0500/0494-Target-Sum/cpp-0494/) | | |
| 495 | [Teemo Attacking](https://leetcode.com/problems/teemo-attacking/) | [solution](https://leetcode.com/problems/teemo-attacking/solution/) | [C++](0001-0500/0495-Teemo-Attacking/cpp-0495/) | | |
| 496 | [Next Greater Element I](https://leetcode.com/problems/next-greater-element-i/) | [solution](https://leetcode.com/problems/next-greater-element-i/solution/) | [C++](0001-0500/0496-Next-Greater-Element-I/cpp-0496/) | | |
| 497 | [Random Point in Non-overlapping Rectangles](https://leetcode.com/problems/random-point-in-non-overlapping-rectangles/solution/) | [solution](https://leetcode.com/problems/random-point-in-non-overlapping-rectangles/solution/) | [C++](0001-0500/0497-Random-Point-in-Non-overlapping-Rectangles/cpp-0497/) | | |
| 498 | [Diagonal Traverse](https://leetcode.com/problems/diagonal-traverse/description/) | [无] | [C++](0001-0500/0498-Diagonal-Traverse/cpp-0498/) | | |
| | | | | | |
| 500 | [Keyboard Row](https://leetcode.com/problems/keyboard-row/) | [无] | [C++](0001-0500/0500-Keyboard-Row/cpp-0500/) | | |
| 501 | [Find Mode in Binary Search Tree](https://leetcode.com/problems/find-mode-in-binary-search-tree/) | [无] | [C++](0501-1000/0501-Find-Mode-in-Binary-Search-Tree/cpp-0501/) | | |
| 502 | [IPO](https://leetcode.com/problems/ipo/) | [solution](https://leetcode.com/problems/ipo/solution/) | [C++](0501-1000/0502-IPO/cpp-0502/) | | |
| 503 | [Next Greater Element II](https://leetcode.com/problems/next-greater-element-ii/) | [solution](https://leetcode.com/problems/next-greater-element-ii/solution/) | [C++](0501-1000/0503-Next-Greater-Element-II/cpp-0503/) | | |
| 504 | [Base 7](https://leetcode.com/problems/base-7/) | [无] | [C++](0501-1000/0504-Base-7/cpp-0504/) | | |
| 505 | [The Maze II](https://leetcode.com/problems/the-maze-ii/) | [solution](https://leetcode.com/problems/the-maze-ii/solution/) | [C++](0501-1000/0505-The-Maze-II/cpp-0505/) | | |
| 506 | [Relative Ranks](https://leetcode.com/problems/relative-ranks/) | [无] | [C++](0501-1000/0506-Relative-Ranks/cpp-0506/) | | |
| 507 | [Perfect Number](https://leetcode.com/problems/perfect-number/) | [solution](https://leetcode.com/problems/perfect-number/solution/) | [C++](0501-1000/0507-Perfect-Number/cpp-0507/) | | |
| 508 | [Most Frequent Subtree Sum](https://leetcode.com/problems/most-frequent-subtree-sum/) | [无] | [C++](0501-1000/0508-Most-Frequent-Subtree-Sum/cpp-0508/) | | |
| 509 | [Fibonacci Number](https://leetcode.com/problems/fibonacci-number/) | [无] | [C++](0501-1000/0509-Fibonacci-Number/cpp-0509/) | | |
| 510 | [Inorder Successor in BST II](https://leetcode.com/problems/inorder-successor-in-bst-ii/) | [无] | [C++](0501-1000/0510-Inorder-Successor-in-BST-II/cpp-0510/) | | |
| 511 | Database Problem: [Link](https://github.com/liuyubobobo/Play-Leetcode-Database/) | - | - | - | - |
| | | | | | |
| 513 | [Find Bottom Left Tree Value](https://leetcode.com/problems/find-bottom-left-tree-value/) | [无] | [C++](0501-1000/0513-Find-Bottom-Left-Tree-Value/cpp-0513/) | | |
| | | | | | |
| 515 | [Find Largest Value in Each Tree Row](https://leetcode.com/problems/find-largest-value-in-each-tree-row/) | [无] | [C++](0501-1000/0515-Find-Largest-Value-in-Each-Tree-Row/cpp-0515/) | | |
| 516 | [Longest Palindromic Subsequence](https://leetcode.com/problems/longest-pa