Just-Code

逐步收录常见面试算法题，包括 剑指offer 和 LeetCode 。
持续更新，如果对您有帮助，小手一点， Star 走一走，靴靴！
题解简介
题目分类收集

题解快速入口

剑指 Offer 题解

剑指 Offer 题解入口如果您有更好或者不同的解法，请提 issue 一起进步，靴靴！
《剑指offer》剖析了80个典型的编程面试题，系统整理基础知识、代码质量、解题思路、优化效率和综合能力这5个面试要点。但是我刷题只有牛客网上的66题。
如果是单纯的面试需求，剑指offer的优先级肯定是在Leetcode之前，总的说它有三个优点： 1.很可能在面试中出现原题 2.约66题，题量少，但是涵盖的内容较全 3.能培养一个良好的刷题习惯
它的缺点是： 1.只有66题，刷着容易过拟合 2.动态规划的题比较少，因此需要在Leetcode上专项训练。

推荐的刷题网站：

牛客网

优点：有氛围非常好的算法讨论区，对于一道题可以有很多人一起讨论。
缺点：题目数量有限，第二版的部分题目未收录，而且测试用例较少不完备。无法自测，每次必须提交。

Acwing

优点：题目收录完备，并且测试用例较多，有体验比较好的测试台自测。
缺点：平台较为小众，可能解法没有牛客网的多，但是希望大家看看 Yaxe 的题解哈哈。

Leetcode 题解

如果要仔细准备面对大厂可能出现的更难的题， Leetcode 上前 400 道也够用了。
我根据题目类型对 LeetCode 前 400 题进行初步分类，再根据题目的相关关系递进地排序，如果你选择仔细刷题，那么随便选择一个题目类型跟着我排的顺序刷题就可以了。推荐优先完成数组、链表和二叉树等基础数据结构的题目。
如果希望根据题号而不是类型查询我的题解，请继续往下划划划（爬虫挂了部分未更新，建议按照tag找）。
LeetCode 分类总目录
1. 链表 Linked_List
2. 树 Tree
3. 动态规划 Dynamic_Programming
4. 数组 Array
5. 广度优先搜索 BFS & 深度优先搜索 DFS
6. 二分搜索 Binary_Search
7. 数理 Math
9. 字符串 String
10.位运算 Bit_Manipulation

字节跳动面经总结算法题

从看准网和牛客笔经面经区扒取了最近两年内的字节跳动后端部分的所有面试算法题，分类整理，并附我的解法，希望对你有所帮助。
因为字节跳动的题目分类必须买 LeetCode 会员才可以看，所以我把题目都添加了一个 list ，然后点击字节跳动分类就可以查看我分享的题目 list 了。因为是英文版LeetCode所以第一次打开可能重定向跳转到**力扣官网，关闭重新打开即可。

分类如下：

代码仓库

#	Title	Solution	Acceptance	Difficulty	Topics
0001	Two Sum	Python3	44.77%	Easy	Array \| Hash Table
0002	Add Two Numbers	Python3	32.23%	Medium	Linked List \| Math
0003	Longest Substring Without Repeating Characters	Python3	29.15%	Medium	Hash Table \| Two Pointers \| String \| Sliding Window
0005	Longest Palindromic Substring	Python3	28.32%	Medium	String \| Dynamic Programming
0006	ZigZag Conversion	Python3	33.91%	Medium	String
0007	Reverse Integer	Python3	25.55%	Easy	Math
0008	String to Integer (atoi)	Python3	14.85%	Medium	Math \| String
0009	Palindrome Number	Python3	45.67%	Easy	Math
0010	Regular Expression Matching	Python3	25.93%	Hard	String \| Dynamic Programming \| Backtracking
0011	Container With Most Water	Python3	47.70%	Medium	Array \| Two Pointers
0012	Integer to Roman	Python3	52.71%	Medium	Math \| String
0013	Roman to Integer	Python3	53.77%	Easy	Math \| String
0014	Longest Common Prefix	Python3	34.38%	Easy	String
0015	3Sum	Python3	25.23%	Medium	Array \| Two Pointers
0016	3Sum Closest	Python3	45.70%	Medium	Array \| Two Pointers
0017	Letter Combinations of a Phone Number	Python3	43.79%	Medium	String \| Backtracking
0019	Remove Nth Node From End of List	Python3	34.62%	Medium	Linked List \| Two Pointers
0020	Valid Parentheses	Python3	37.58%	Easy	String \| Stack
0021	Merge Two Sorted Lists	Python3	50.01%	Easy	Linked List
0022	Generate Parentheses	Python3	58.19%	Medium	String \| Backtracking
0023	Merge k Sorted Lists	Python3	37.02%	Hard	Linked List \| Divide and Conquer \| Heap
0024	Swap Nodes in Pairs	Python3	47.17%	Medium	Linked List
0025	Reverse Nodes in k-Group	Python3	38.62%	Hard	Linked List
0026	Remove Duplicates from Sorted Array	Python3	42.51%	Easy	Array \| Two Pointers
0027	Remove Element	Python3	46.12%	Easy	Array \| Two Pointers
0031	Next Permutation	Python3	31.37%	Medium	Array
0033	Search in Rotated Sorted Array	Python3	33.38%	Medium	Array \| Binary Search
0034	Find First and Last Position of Element in Sorted Array	Python3	34.60%	Medium	Array \| Binary Search
0035	Search Insert Position	Python3	41.29%	Easy	Array \| Binary Search
0041	First Missing Positive	Python3	30.20%	Hard	Array
0042	Trapping Rain Water	Python3	45.70%	Hard	Array \| Two Pointers \| Stack
0047	Permutations II	Python3	43.08%	Medium	Backtracking
0048	Rotate Image	Python3	51.77%	Medium	Array
0049	Group Anagrams	Python3	50.81%	Medium	Hash Table \| String
0050	Pow(x, n)	Python3	28.81%	Medium	Math \| Binary Search
0053	Maximum Subarray	Python3	45.07%	Easy	Array \| Divide and Conquer \| Dynamic Programming
0054	Spiral Matrix	Python3	32.03%	Medium	Array
0056	Merge Intervals	Python3	37.24%	Medium	Array \| Sort
0057	Insert Interval	Python3	32.12%	Hard	Array \| Sort
0058	Length of Last Word	Python3	32.34%	Easy	String
0059	Spiral Matrix II	Python3	49.90%	Medium	Array
0061	Rotate List	Python3	28.35%	Medium	Linked List \| Two Pointers
0062	Unique Paths	Python3	50.11%	Medium	Array \| Dynamic Programming
0063	Unique Paths II	Python3	33.76%	Medium	Array \| Dynamic Programming
0064	Minimum Path Sum	Python3	49.54%	Medium	Array \| Dynamic Programming
0065	Valid Number	Python3	14.52%	Hard	Math \| String
0066	Plus One	Python3	41.77%	Easy	Array
0067	Add Binary	Python3	41.33%	Easy	Math \| String
0069	Sqrt(x)	Python3	32.44%	Easy	Math \| Binary Search
0070	Climbing Stairs	Python3	45.51%	Easy	Dynamic Programming
0071	Simplify Path	Python3	30.26%	Medium	String \| Stack
0072	Edit Distance	Python3	40.24%	Hard	String \| Dynamic Programming
0073	Set Matrix Zeroes	Python3	41.35%	Medium	Array
0074	Search a 2D Matrix	Python3	35.52%	Medium	Array \| Binary Search
0075	Sort Colors	Python3	43.83%	Medium	Array \| Two Pointers \| Sort
0076	Minimum Window Substring	Python3	32.56%	Hard	Hash Table \| Two Pointers \| String \| Sliding Window
0078	Subsets	Python3	56.34%	Medium	Array \| Backtracking \| Bit Manipulation
0079	Word Search	Python3	32.93%	Medium	Array \| Backtracking
0080	Remove Duplicates from Sorted Array II	Python3	41.87%	Medium	Array \| Two Pointers
0082	Remove Duplicates from Sorted List II	Python3	34.63%	Medium	Linked List
0083	Remove Duplicates from Sorted List	Python3	43.74%	Easy	Linked List
0085	Maximal Rectangle	Python3	35.17%	Hard	Array \| Hash Table \| Dynamic Programming \| Stack
0086	Partition List	Python3	39.00%	Medium	Linked List \| Two Pointers
0088	Merge Sorted Array	Python3	37.41%	Easy	Array \| Two Pointers
0091	Decode Ways	Python3	23.22%	Medium	String \| Dynamic Programming
0092	Reverse Linked List II	Python3	36.57%	Medium	Linked List
0094	Binary Tree Inorder Traversal	Python3	59.50%	Medium	Hash Table \| Stack \| Tree
0095	Unique Binary Search Trees II	Python3	37.58%	Medium	Dynamic Programming \| Tree
0096	Unique Binary Search Trees	Python3	48.60%	Medium	Dynamic Programming \| Tree
0098	Validate Binary Search Tree	Python3	26.67%	Medium	Tree \| Depth-first Search
0099	Recover Binary Search Tree	Python3	36.38%	Hard	Tree \| Depth-first Search
0100	Same Tree	Python3	51.23%	Easy	Tree \| Depth-first Search
0101	Symmetric Tree	Python3	44.96%	Easy	Tree \| Depth-first Search \| Breadth-first Search
0102	Binary Tree Level Order Traversal	Python3	50.98%	Medium	Tree \| Breadth-first Search
0103	Binary Tree Zigzag Level Order Traversal	Python3	44.09%	Medium	Stack \| Tree \| Breadth-first Search
0104	Maximum Depth of Binary Tree	Python3	62.93%	Easy	Tree \| Depth-first Search
0105	Construct Binary Tree from Preorder and Inorder Traversal	Python3	44.24%	Medium	Array \| Tree \| Depth-first Search
0106	Construct Binary Tree from Inorder and Postorder Traversal	Python3	41.91%	Medium	Array \| Tree \| Depth-first Search
0107	Binary Tree Level Order Traversal II	Python3	48.95%	Easy	Tree \| Breadth-first Search
0108	Convert Sorted Array to Binary Search Tree	Python3	53.67%	Easy	Tree \| Depth-first Search
0109	Convert Sorted List to Binary Search Tree	Python3	43.51%	Medium	Linked List \| Depth-first Search
0110	Balanced Binary Tree	Python3	42.09%	Easy	Tree \| Depth-first Search
0111	Minimum Depth of Binary Tree	Python3	36.18%	Easy	Tree \| Depth-first Search \| Breadth-first Search
0112	Path Sum	Python3	39.18%	Easy	Tree \| Depth-first Search
0113	Path Sum II	Python3	43.10%	Medium	Tree \| Depth-first Search
0114	Flatten Binary Tree to Linked List	Python3	45.15%	Medium	Tree \| Depth-first Search
0116	Populating Next Right Pointers in Each Node	Python3	40.34%	Medium	Tree \| Depth-first Search
0117	Populating Next Right Pointers in Each Node II	Python3	36.24%	Medium	Tree \| Depth-first Search
0118	Pascal's Triangle	Python3	48.82%	Easy	Array
0119	Pascal's Triangle II	Python3	45.95%	Easy	Array
0120	Triangle	Python3	41.41%	Medium	Array \| Dynamic Programming
0121	Best Time to Buy and Sell Stock	Python3	48.72%	Easy	Array \| Dynamic Programming
0122	Best Time to Buy and Sell Stock II	Python3	53.65%	Easy	Array \| Greedy
0123	Best Time to Buy and Sell Stock III	Python3	35.37%	Hard	Array \| Dynamic Programming
0124	Binary Tree Maximum Path Sum	Python3	31.60%	Hard	Tree \| Depth-first Search
0125	Valid Palindrome	Python3	33.10%	Easy	Two Pointers \| String
0129	Sum Root to Leaf Numbers	Python3	44.49%	Medium	Tree \| Depth-first Search
0130	Surrounded Regions	Python3	24.60%	Medium	Depth-first Search \| Breadth-first Search \| Union Find
0136	Single Number	Python3	62.06%	Easy	Hash Table \| Bit Manipulation
0137	Single Number II	Python3	47.73%	Medium	Bit Manipulation
0138	Copy List with Random Pointer	Python3	30.50%	Medium	Hash Table \| Linked List
0139	Word Break	Python3	37.33%	Medium	Dynamic Programming
0142	Linked List Cycle II	Python3	34.21%	Medium	Linked List \| Two Pointers
0143	Reorder List	Python3	33.18%	Medium	Linked List
0144	Binary Tree Preorder Traversal	Python3	53.19%	Medium	Stack \| Tree
0145	Binary Tree Postorder Traversal	Python3	51.15%	Hard	Stack \| Tree
0150	Evaluate Reverse Polish Notation	Python3	33.97%	Medium	Stack
0151	Reverse Words in a String	Python3	18.51%	Medium	String
0152	Maximum Product Subarray	Python3	30.38%	Medium	Array \| Dynamic Programming
0153	Find Minimum in Rotated Sorted Array	Python3	43.87%	Medium	Array \| Binary Search
0154	Find Minimum in Rotated Sorted Array II	Python3	39.98%	Hard	Array \| Binary Search
0155	Min Stack	Python3	39.70%	Easy	Stack \| Design
0162	Find Peak Element	Python3	42.18%	Medium	Array \| Binary Search
0167	Two Sum II - Input array is sorted	Python3	51.86%	Easy	Array \| Two Pointers \| Binary Search
0168	Excel Sheet Column Title	Python3	29.86%	Easy	Math
0169	Majority Element	Python3	54.86%	Easy	Array \| Divide and Conquer \| Bit Manipulation
0171	Excel Sheet Column Number	Python3	52.72%	Easy	Math
0179	Largest Number	Python3	26.92%	Medium	Sort
0189	Rotate Array	Python3	32.10%	Easy	Array
0198	House Robber	Python3	41.45%	Easy	Dynamic Programming
0199	Binary Tree Right Side View	Python3	50.45%	Medium	Tree \| Depth-first Search \| Breadth-first Search
0200	Number of Islands	Python3	43.72%	Medium	Depth-first Search \| Breadth-first Search \| Union Find
0201	Bitwise AND of Numbers Range	Python3	36.80%	Medium	Bit Manipulation
0202	Happy Number	Python3	47.41%	Easy	Hash Table \| Math
0203	Remove Linked List Elements	Python3	36.70%	Easy	Linked List
0204	Count Primes	Python3	30.16%	Easy	Hash Table \| Math
0206	Reverse Linked List	Python3	58.03%	Easy	Linked List
0209	Minimum Size Subarray Sum	Python3	36.01%	Medium	Array \| Two Pointers \| Binary Search
0213	House Robber II	Python3	35.73%	Medium	Dynamic Programming
0215	Kth Largest Element in an Array	Python3	50.95%	Medium	Divide and Conquer \| Heap
0217	Contains Duplicate	Python3	53.98%	Easy	Array \| Hash Table
0219	Contains Duplicate II	Python3	36.32%	Easy	Array \| Hash Table
0220	Contains Duplicate III	Python3	20.28%	Medium	Sort \| Ordered Map
0221	Maximal Square	Python3	34.62%	Medium	Dynamic Programming
0222	Count Complete Tree Nodes	Python3	38.82%	Medium	Binary Search \| Tree
0226	Invert Binary Tree	Python3	60.46%	Easy	Tree
0230	Kth Smallest Element in a BST	Python3	54.43%	Medium	Binary Search \| Tree
0231	Power of Two	Python3	42.54%	Easy	Math \| Bit Manipulation
0232	Implement Queue using Stacks	Python3	45.84%	Easy	Stack \| Design
0233	Number of Digit One	Python3	30.78%	Hard	Math
0234	Palindrome Linked List	Python3	37.38%	Easy	Linked List \| Two Pointers
0235	Lowest Common Ancestor of a Binary Search Tree	Python3	47.05%	Easy	Tree
0236	Lowest Common Ancestor of a Binary Tree	Python3	40.98%	Medium	Tree
0237	Delete Node in a Linked List	Python3	56.65%	Easy	Linked List
0239	Sliding Window Maximum	Python3	40.03%	Hard	Heap \| Sliding Window
0240	Search a 2D Matrix II	Python3	41.90%	Medium	Binary Search \| Divide and Conquer
0242	Valid Anagram	Python3	54.22%	Easy	Hash Table \| Sort
0257	Binary Tree Paths	Python3	48.02%	Easy	Tree \| Depth-first Search
0260	Single Number III	Python3	58.74%	Medium	Bit Manipulation
0263	Ugly Number	Python3	41.07%	Easy	Math
0264	Ugly Number II	Python3	37.98%	Medium	Math \| Dynamic Programming \| Heap
0268	Missing Number	Python3	49.60%	Easy	Array \| Math \| Bit Manipulation
0278	First Bad Version	Python3	32.03%	Easy	Binary Search
0279	Perfect Squares	Python3	43.46%	Medium	Math \| Dynamic Programming \| Breadth-first Search
0283	Move Zeroes	Python3	55.63%	Easy	Array \| Two Pointers
0287	Find the Duplicate Number	Python3	51.65%	Medium	Array \| Two Pointers \| Binary Search
0290	Word Pattern	Python3	35.88%	Easy	Hash Table
0292	Nim Game	Python3	55.92%	Easy	Brainteaser \| Minimax
0297	Serialize and Deserialize Binary Tree	Python3	43.77%	Hard	Tree \| Design
0300	Longest Increasing Subsequence	Python3	41.69%	Medium	Binary Search \| Dynamic Programming
0303	Range Sum Query - Immutable	Python3	40.70%	Easy	Dynamic Programming
0312	Burst Balloons	Python3	49.17%	Hard	Divide and Conquer \| Dynamic Programming
0315	Count of Smaller Numbers After Self	Python3	39.99%	Hard	Binary Search \| Divide and Conquer \| Sort \| Binary Indexed Tree \| Segment Tree
0319	Bulb Switcher	Python3	44.67%	Medium	Math \| Brainteaser
0322	Coin Change	Python3	32.55%	Medium	Dynamic Programming
0326	Power of Three	Python3	41.88%	Easy	Math
0328	Odd Even Linked List	Python3	51.09%	Medium	Linked List
0329	Longest Increasing Path in a Matrix	Python3	41.49%	Hard	Depth-first Search \| Topological Sort \| Memoization
0337	House Robber III	Python3	49.24%	Medium	Tree \| Depth-first Search
0338	Counting Bits	Python3	66.06%	Medium	Dynamic Programming \| Bit Manipulation
0342	Power of Four	Python3	40.89%	Easy	Bit Manipulation
0343	Integer Break	Python3	48.89%	Medium	Math \| Dynamic Programming
0344	Reverse String	Python3	64.70%	Easy	Two Pointers \| String
0345	Reverse Vowels of a String	Python3	42.49%	Easy	Two Pointers \| String
0349	Intersection of Two Arrays	Python3	57.93%	Easy	Hash Table \| Two Pointers \| Binary Search \| Sort
0350	Intersection of Two Arrays II	Python3	49.65%	Easy	Hash Table \| Two Pointers \| Binary Search \| Sort
0357	Count Numbers with Unique Digits	Python3	47.63%	Medium	Math \| Dynamic Programming \| Backtracking
0371	Sum of Two Integers	Python3	50.77%	Easy	Bit Manipulation
0372	Super Pow	Python3	36.04%	Medium	Math
0378	Kth Smallest Element in a Sorted Matrix	Python3	51.36%	Medium	Binary Search \| Heap
0383	Ransom Note	Python3	51.04%	Easy	String
0384	Shuffle an Array	Python3	51.26%	Medium
0387	First Unique Character in a String	Python3	50.99%	Easy	Hash Table \| String
0389	Find the Difference	Python3	53.93%	Easy	Hash Table \| Bit Manipulation
0400	Nth Digit	Python3	30.81%	Medium	Math
0404	Sum of Left Leaves	Python3	49.89%	Easy	Tree
0409	Longest Palindrome	Python3	49.03%	Easy	Hash Table
0412	Fizz Buzz	Python3	60.45%	Easy
0415	Add Strings	Python3	45.26%	Easy	String
0429	N-ary Tree Level Order Traversal	Python3	61.29%	Medium	Tree \| Breadth-first Search
0430	Flatten a Multilevel Doubly Linked List	Python3	45.96%	Medium	Linked List \| Depth-first Search
0434	Number of Segments in a String	Python3	37.32%	Easy	String
0437	Path Sum III	Python3	44.21%	Easy	Tree
0442	Find All Duplicates in an Array	Python3	62.97%	Medium	Array
0445	Add Two Numbers II	Python3	51.93%	Medium	Linked List
0459	Repeated Substring Pattern	Python3	40.73%	Easy	String
0461	Hamming Distance	Python3	70.80%	Easy	Bit Manipulation
0463	Island Perimeter	Python3	62.17%	Easy	Hash Table
0470	Implement Rand10() Using Rand7()	Python3	45.54%	Medium	Random \| Rejection Sampling
0476	Number Complement	Python3	62.89%	Easy	Bit Manipulation
0485	Max Consecutive Ones	Python3	55.80%	Easy	Array
0496	Next Greater Element I	Python3	61.21%	Easy	Stack
0500	Keyboard Row	Python3	63.19%	Easy	Hash Table
0503	Next Greater Element II	Python3	52.85%	Medium	Stack
0508	Most Frequent Subtree Sum	Python3	55.93%	Medium	Hash Table \| Tree
0509	Fibonacci Number	Python3	66.62%	Easy	Array
0513	Find Bottom Left Tree Value	Python3	59.74%	Medium	Tree \| Depth-first Search \| Breadth-first Search
0515	Find Largest Value in Each Tree Row	Python3	58.85%	Medium	Tree \| Depth-first Search \| Breadth-first Search
0520	Detect Capital	Python3	52.81%	Easy	String
0521	Longest Uncommon Subsequence I	Python3	56.95%	Easy	String
0523	Continuous Subarray Sum	Python3	24.38%	Medium	Math \| Dynamic Programming
0530	Minimum Absolute Difference in BST	Python3	51.80%	Easy	Tree
0538	Convert BST to Greater Tree	Python3	52.80%	Easy	Tree
0540	Single Element in a Sorted Array	Python3	57.54%	Medium
0541	Reverse String II	Python3	46.63%	Easy	String
0543	Diameter of Binary Tree	Python3	47.80%	Easy	Tree
0551	Student Attendance Record I	Python3	46.12%	Easy	String
0556	Next Greater Element III	Python3	30.68%	Medium	String
0557	Reverse Words in a String III	Python3	66.34%	Easy	String
0559	Maximum Depth of N-ary Tree	Python3	66.51%	Easy	Tree \| Depth-first Search \| Breadth-first Search
0561	Array Partition I	Python3	70.39%	Easy	Array
0575	Distribute Candies	Python3	60.30%	Easy	Hash Table
0583	Delete Operation for Two Strings	Python3	46.15%	Medium	String
0589	N-ary Tree Preorder Traversal	Python3	69.40%	Easy	Tree
0590	N-ary Tree Postorder Traversal	Python3	69.38%	Easy	Tree
0606	Construct String from Binary Tree	Python3	52.53%	Easy	String \| Tree
0611	Valid Triangle Number	Python3	46.76%	Medium	Array
0617	Merge Two Binary Trees	Python3	71.76%	Easy	Tree
0637	Average of Levels in Binary Tree	Python3	60.31%	Easy	Tree
0643	Maximum Average Subarray I	Python3	40.47%	Easy	Array
0653	Two Sum IV - Input is a BST	Python3	53.74%	Easy	Tree
0654	Maximum Binary Tree	Python3	77.59%	Medium	Tree
0655	Print Binary Tree	Python3	52.91%	Medium	Tree
0657	Robot Return to Origin	Python3	72.49%	Easy	String
0662	Maximum Width of Binary Tree	Python3	39.56%	Medium	Tree
0669	Trim a Binary Search Tree	Python3	61.29%	Easy	Tree
0670	Maximum Swap	Python3	41.22%	Medium	Array \| Math
0671	Second Minimum Node In a Binary Tree	Python3	43.05%	Easy	Tree
0701	Insert into a Binary Search Tree	Python3	77.75%	Medium	Tree
0704	Binary Search	Python3	49.83%	Easy	Binary Search
0707	Design Linked List	Python3	21.13%	Medium	Linked List \| Design
0709	To Lower Case	Python3	78.02%	Easy	String
0725	Split Linked List in Parts	Python3	50.14%	Medium	Linked List
0728	Self Dividing Numbers	Python3	72.09%	Easy	Math
0739	Daily Temperatures	Python3	61.20%	Medium	Hash Table \| Stack
0744	Find Smallest Letter Greater Than Target	Python3	44.59%	Easy	Binary Search
0763	Partition Labels	Python3	72.91%	Medium	Two Pointers \| Greedy
0771	Jewels and Stones	Python3	84.06%	Easy	Hash Table
0781	Rabbits in Forest	Python3	52.73%	Medium	Hash Table \| Math
0783	Minimum Distance Between BST Nodes	Python3	51.05%	Easy	Tree \| Recursion
0788	Rotated Digits	Python3	55.77%	Easy	String
0791	Custom Sort String	Python3	63.79%	Medium	String
0804	Unique Morse Code Words	Python3	75.51%	Easy	String
0807	Max Increase to Keep City Skyline	Python3	82.40%	Medium
0811	Subdomain Visit Count	Python3	67.01%	Easy	Hash Table
0814	Binary Tree Pruning	Python3	72.37%	Medium	Tree
0817	Linked List Components	Python3	55.88%	Medium	Linked List
0819	Most Common Word	Python3	43.16%	Easy	String
0824	Goat Latin	Python3	59.66%	Easy	String
0832	Flipping an Image	Python3	73.97%	Easy	Array
0841	Keys and Rooms	Python3	61.85%	Medium	Depth-first Search \| Graph
0852	Peak Index in a Mountain Array	Python3	70.43%	Easy	Binary Search
0859	Buddy Strings	Python3	27.79%	Easy	String
0867	Transpose Matrix	Python3	63.85%	Easy	Array
0872	Leaf-Similar Trees	Python3	64.26%	Easy	Tree \| Depth-first Search
0874	Walking Robot Simulation	Python3	33.47%	Easy	Greedy
0876	Middle of the Linked List	Python3	65.45%	Easy	Linked List
0877	Stone Game	Python3	62.76%	Medium	Math \| Dynamic Programming \| Minimax
0884	Uncommon Words from Two Sentences	Python3	61.43%	Easy	Hash Table
0894	All Possible Full Binary Trees	Python3	72.31%	Medium	Tree \| Recursion
0897	Increasing Order Search Tree	Python3	66.40%	Easy	Tree \| Depth-first Search
0905	Sort Array By Parity	Python3	73.11%	Easy	Array
0908	Smallest Range I	Python3	65.04%	Easy	Math
0912	Sort an Array	Python3	62.77%	Medium
0917	Reverse Only Letters	Python3	56.54%	Easy	String
0921	Minimum Add to Make Parentheses Valid	Python3	70.99%	Medium	Stack \| Greedy
0922	Sort Array By Parity II	Python3	67.42%	Easy	Array \| Sort
0929	Unique Email Addresses	Python3	68.20%	Easy	String
0931	Minimum Falling Path Sum	Python3	59.83%	Medium	Dynamic Programming
0933	Number of Recent Calls	Python3	69.73%	Easy	Queue
0938	Range Sum of BST	Python3	78.53%	Easy	Tree \| Recursion
0942	DI String Match	Python3	70.19%	Easy	Math
0944	Delete Columns to Make Sorted	Python3	69.67%	Easy	Greedy
0946	Validate Stack Sequences	Python3	58.45%	Medium	Stack
0950	Reveal Cards In Increasing Order	Python3	72.64%	Medium	Array
0951	Flip Equivalent Binary Trees	Python3	65.23%	Medium	Tree
0958	Check Completeness of a Binary Tree	Python3	50.40%	Medium	Tree
0961	N-Repeated Element in Size 2N Array	Python3	72.73%	Easy	Hash Table
0965	Univalued Binary Tree	Python3	66.89%	Easy	Tree
0968	Binary Tree Cameras	Python3	36.40%	Hard	Dynamic Programming \| Tree \| Depth-first Search
0969	Pancake Sorting	Python3	63.15%	Medium	Array \| Sort
0977	Squares of a Sorted Array	Python3	71.87%	Easy	Array \| Two Pointers
0979	Distribute Coins in Binary Tree	Python3	68.05%	Medium	Tree \| Depth-first Search
0986	Interval List Intersections	Python3	64.58%	Medium	Two Pointers
0987	Vertical Order Traversal of a Binary Tree	Python3	33.50%	Medium	Hash Table \| Tree
0988	Smallest String Starting From Leaf	Python3	44.84%	Medium	Tree \| Depth-first Search
0989	Add to Array-Form of Integer	Python3	43.99%	Easy	Array
0993	Cousins in Binary Tree	Python3	51.88%	Easy	Tree \| Breadth-first Search
0998	Maximum Binary Tree II	Python3	61.65%	Medium	Tree
1002	Find Common Characters	Python3	66.03%	Easy	Array \| Hash Table
1004	Max Consecutive Ones III	Python3	55.33%	Medium	Two Pointers \| Sliding Window
1008	Construct Binary Search Tree from Preorder Traversal	Python3	74.15%	Medium	Tree
1009	Complement of Base 10 Integer	Python3	59.22%	Easy	Math
1019	Next Greater Node In Linked List	Python3	56.59%	Medium	Linked List \| Stack
1021	Remove Outermost Parentheses	Python3	75.74%	Easy	Stack
1022	Sum of Root To Leaf Binary Numbers	Python3	62.36%	Easy	Tree
1025	Divisor Game	Python3	65.18%	Easy	Math \| Dynamic Programming
1026	Maximum Difference Between Node and Ancestor	Python3	61.75%	Medium	Tree \| Depth-first Search
1028	Recover a Tree From Preorder Traversal	Python3	69.38%	Hard	Tree \| Depth-first Search
1038	Binary Search Tree to Greater Sum Tree	Python3	78.17%	Medium	Binary Search Tree
1041	Robot Bounded In Circle	Python3	46.63%	Medium	Math
1043	Partition Array for Maximum Sum	Python3	62.94%	Medium	Graph
1046	Last Stone Weight	Python3	62.43%	Easy	Heap \| Greedy
1049	Last Stone Weight II	Python3	41.74%	Medium	Dynamic Programming
1051	Height Checker	Python3	68.23%	Easy	Array
1071	Greatest Common Divisor of Strings	Python3	53.79%	Easy	String
1072	Flip Columns For Maximum Number of Equal Rows	Python3	59.37%	Medium	Hash Table
1078	Occurrences After Bigram	Python3	64.40%	Easy	Hash Table
1089	Duplicate Zeros	Python3	58.36%	Easy	Array
1104	Path In Zigzag Labelled Binary Tree	Python3	70.47%	Medium	Math \| Tree
1106	Parsing A Boolean Expression	Python3	57.51%	Hard	String
1108	Defanging an IP Address	Python3	84.84%	Easy	String
1110	Delete Nodes And Return Forest	Python3	64.60%	Medium	Tree \| Depth-first Search
1114	Print in Order	Python3	60.62%	Easy
1123	Lowest Common Ancestor of Deepest Leaves	Python3	65.13%	Medium	Tree \| Depth-first Search
1130	Minimum Cost Tree From Leaf Values	Python3	62.92%	Medium	Dynamic Programming \| Stack \| Tree
1143	Longest Common Subsequence	Python3	57.30%	Medium	Dynamic Programming
1154	Day of the Year	Python3	48.93%	Easy	Math
1161	Maximum Level Sum of a Binary Tree	Python3	70.80%	Medium	Graph
1170	Compare Strings by Frequency of the Smallest Character	Python3	58.33%	Easy	Array \| String
1171	Remove Zero Sum Consecutive Nodes from Linked List	Python3	41.55%	Medium	Linked List
1184	Distance Between Bus Stops	Python3	55.79%	Easy	Array
1185	Day of the Week	Python3	64.29%	Easy	Array
1189	Maximum Number of Balloons	Python3	61.41%	Easy	Hash Table \| String
1190	Reverse Substrings Between Each Pair of Parentheses	Python3	57.84%	Medium	Stack
1200	Minimum Absolute Difference	Python3	66.14%	Easy	Array
1202	Smallest String With Swaps	Python3	41.60%	Medium	Array \| Union Find
1207	Unique Number of Occurrences	Python3	72.44%	Easy	Hash Table
1209	Remove All Adjacent Duplicates in String II	Python3	56.53%	Medium	Stack
1217	Play with Chips	Python3	63.66%	Easy	Array \| Math \| Greedy
1219	Path with Maximum Gold	Python3	61.59%	Medium	Backtracking
1221	Split a String in Balanced Strings	Python3	78.74%	Easy	String \| Greedy
1227	Airplane Seat Assignment Probability	Python3	59.91%	Medium	Math \| Dynamic Programming \| Brainteaser
1233	Remove Sub-Folders from the Filesystem	Python3	54.45%	Medium	Array \| String
1237	Find Positive Integer Solution for a Given Equation	Python3	66.88%	Easy	Math \| Binary Search
1240	Tiling a Rectangle with the Fewest Squares	Python3	48.98%	Hard	Dynamic Programming \| Backtracking
1247	Minimum Swaps to Make Strings Equal	Python3	57.26%	Medium	String \| Greedy
1248	Count Number of Nice Subarrays	Python3	52.86%	Medium	Two Pointers
1249	Minimum Remove to Make Valid Parentheses	Python3	59.35%	Medium	String \| Stack
1250	Check If It Is a Good Array	Python3	50.25%	Hard	Math
1252	Cells with Odd Values in a Matrix	Python3	78.68%	Easy	Array
1254	Number of Closed Islands	Python3	59.79%	Medium	Depth-first Search
1255	Maximum Score Words Formed by Letters	Python3	71.02%	Hard	Bit Manipulation
1260	Shift 2D Grid	Python3	58.67%	Easy	Array
1261	Find Elements in a Contaminated Binary Tree	Python3	72.40%	Medium	Hash Table \| Tree
1262	Greatest Sum Divisible by Three	Python3	39.16%	Medium	Dynamic Programming

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