My LeetCode Solutions

Last updated: 2022-04-23 14:06:35

#	Title	Solutions	Acceptance	Difficulty	Tags
剑指 Offer II 069	山峰数组的顶部	Go	71.2%	easy	Array, Binary Search
剑指 Offer II 024	反转链表	Go	75.5%	easy	Recursion, Linked List
剑指 Offer II 023	两个链表的第一个重合节点	Go	69.9%	easy	Hash Table, Linked List, Two Pointers
剑指 Offer II 022	链表中环的入口节点	Go	55.2%	medium	Hash Table, Linked List, Two Pointers
剑指 Offer II 021	删除链表的倒数第 n 个结点	Go	52.6%	medium	Linked List, Two Pointers
剑指 Offer II 020	回文子字符串的个数	Go	71.9%	medium	String, Dynamic Programming
剑指 Offer II 019	最多删除一个字符得到回文	Go	45.7%	easy	Greedy, Two Pointers, String
剑指 Offer II 018	有效的回文	Go	51.5%	easy	Two Pointers, String
剑指 Offer II 017	含有所有字符的最短字符串	Go	50.3%	hard	Hash Table, String, Sliding Window
剑指 Offer II 016	不含重复字符的最长子字符串	Go	47.6%	medium	Hash Table, String, Sliding Window
剑指 Offer II 015	字符串中的所有变位词	Go	61.9%	medium	Hash Table, String, Sliding Window
剑指 Offer II 014	字符串中的变位词	Go	51.3%	medium	Hash Table, Two Pointers, String, Sliding Window
剑指 Offer II 013	二维子矩阵的和	Go	66.0%	medium	Design, Array, Matrix, Prefix Sum
剑指 Offer II 012	左右两边子数组的和相等	Go	66.9%	easy	Array, Prefix Sum
剑指 Offer II 011	0 和 1 个数相同的子数组	Go	55.7%	medium	Array, Hash Table, Prefix Sum
剑指 Offer II 010	和为 k 的子数组	Go	43.5%	medium	Array, Hash Table, Prefix Sum
剑指 Offer II 009	乘积小于 K 的子数组	Go	53.7%	medium	Array, Sliding Window
剑指 Offer II 008	和大于等于 target 的最短子数组	Go	48.9%	medium	Array, Binary Search, Prefix Sum, Sliding Window
剑指 Offer II 007	数组中和为 0 的三个数	Go	44.2%	medium	Array, Two Pointers, Sorting
剑指 Offer II 006	排序数组中两个数字之和	Go	64.2%	easy	Array, Two Pointers, Binary Search
剑指 Offer II 005	单词长度的最大乘积	Go	70.7%	medium	Bit Manipulation, Array, String
剑指 Offer II 004	只出现一次的数字	Go	70.8%	medium	Bit Manipulation, Array
剑指 Offer II 002	二进制加法	Go	55.4%	easy	Bit Manipulation, Math, String, Simulation
剑指 Offer II 003	前 n 个数字二进制中 1 的个数	Go	78.6%	easy	Bit Manipulation, Dynamic Programming
剑指 Offer II 001	整数除法	Go	20.9%	easy	Bit Manipulation, Math
剑指 Offer 68 - II	二叉树的最近公共祖先 LCOF	Go	70.3%	easy	Tree, Depth-First Search, Binary Tree
剑指 Offer 68 - I	二叉搜索树的最近公共祖先 LCOF	Python3	69.5%	easy	Tree, Depth-First Search, Binary Search Tree, Binary Tree
剑指 Offer 64	求1+2+…+n LCOF	Go	85.9%	medium	Bit Manipulation, Recursion, Brainteaser
剑指 Offer 63	股票的最大利润 LCOF	Go	63.5%	medium	Array, Dynamic Programming
剑指 Offer 62	圆圈中最后剩下的数字 LCOF	Go	65.8%	easy	Recursion, Math
剑指 Offer 55 - II	平衡二叉树 LCOF	Go	59.4%	easy	Tree, Depth-First Search, Binary Tree
剑指 Offer 61	扑克牌中的顺子 LCOF	Go	46.0%	easy	Array, Sorting
剑指 Offer 67	把字符串转换成整数 LCOF	Python3	29.0%	medium	String
剑指 Offer 66	构建乘积数组 LCOF	Go	60.0%	medium	Array, Prefix Sum
剑指 Offer 59 - II	队列的最大值 LCOF	Go	47.7%	medium	Design, Queue, Monotonic Queue
剑指 Offer 59 - I	滑动窗口的最大值 LCOF	Go	44.6%	hard	Queue, Sliding Window, Monotonic Queue, Heap (Priority Queue)
剑指 Offer 65	不用加减乘除做加法 LCOF	Go	59.2%	easy	Bit Manipulation, Math
剑指 Offer 54	二叉搜索树的第k大节点 LCOF	Go	76.2%	easy	Tree, Depth-First Search, Binary Search Tree, Binary Tree
剑指 Offer 48	最长不含重复字符的子字符串 LCOF	Go	46.4%	medium	Hash Table, String, Sliding Window
剑指 Offer 53 - II	缺失的数字 LCOF	Rust	44.7%	easy	Bit Manipulation, Array, Hash Table, Math, Binary Search
剑指 Offer 58 - II	左旋转字符串 LCOF	Go, Rust	86.0%	easy	Math, Two Pointers, String
剑指 Offer 53 - I	在排序数组中查找数字 LCOF	Go, Rust	53.1%	easy	Array, Binary Search
剑指 Offer 58 - I	翻转单词顺序 LCOF	Python3	44.5%	easy	Two Pointers, String
剑指 Offer 47	礼物的最大价值 LCOF	Go	69.1%	medium	Array, Dynamic Programming, Matrix
剑指 Offer 52	两个链表的第一个公共节点 LCOF	Go	65.5%	easy	Hash Table, Linked List, Two Pointers
剑指 Offer 46	把数字翻译成字符串 LCOF	Go	52.3%	medium	String, Dynamic Programming
剑指 Offer 57 - II	和为s的连续正数序列 LCOF	Go	71.0%	easy	Math, Two Pointers, Enumeration
剑指 Offer 45	把数组排成最小的数 LCOF	Go	55.6%	medium	Greedy, String, Sorting
剑指 Offer 57	和为s的两个数字 LCOF	Go	67.7%	easy	Array, Two Pointers, Binary Search
剑指 Offer 56 - II	数组中数字出现的次数 II LCOF	Python3	80.5%	medium	Bit Manipulation, Array
剑指 Offer 56 - I	数组中数字出现的次数 LCOF	Go	69.3%	medium	Bit Manipulation, Array
剑指 Offer 55 - I	二叉树的深度 LCOF	Go	79.2%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
剑指 Offer 34	二叉树中和为某一值的路径 LCOF	Python3	58.5%	medium	Tree, Depth-First Search, Backtracking, Binary Tree
剑指 Offer 50	第一个只出现一次的字符 LCOF	Go, Rust	62.1%	easy	Queue, Hash Table, String, Counting
剑指 Offer 33	二叉搜索树的后序遍历序列 LCOF	Go	56.0%	medium	Stack, Tree, Binary Search Tree, Recursion, Binary Tree, Monotonic Stack
剑指 Offer 32 - III	从上到下打印二叉树 III LCOF	Go	58.7%	medium	Tree, Breadth-First Search, Binary Tree
剑指 Offer 32 - II	从上到下打印二叉树 II LCOF	Go	68.8%	easy	Tree, Breadth-First Search, Binary Tree
剑指 Offer 32 - I	从上到下打印二叉树 LCOF	Go	63.8%	medium	Tree, Breadth-First Search, Binary Tree
剑指 Offer 39	数组中出现次数超过一半的数字 LCOF	Go	69.9%	easy	Array, Hash Table, Divide and Conquer, Counting, Sorting
剑指 Offer 38	字符串的排列 LCOF	Go	58.0%	medium	String, Backtracking
剑指 Offer 37	序列化二叉树 LCOF	Java	56.8%	hard	Tree, Depth-First Search, Breadth-First Search, Design, String, Binary Tree
剑指 Offer 31	栈的压入、弹出序列 LCOF	Go	61.9%	medium	Stack, Array, Simulation
剑指 Offer 36	二叉搜索树与双向链表 LCOF	Python3	65.2%	medium	Stack, Tree, Depth-First Search, Binary Search Tree, Linked List, Binary Tree, Doubly-Linked List
剑指 Offer 42	连续子数组的最大和 LCOF	Go	60.7%	easy	Array, Divide and Conquer, Dynamic Programming
剑指 Offer 41	数据流中的中位数 LCOF	Go	58.4%	hard	Design, Two Pointers, Data Stream, Sorting, Heap (Priority Queue)
剑指 Offer 30	包含min函数的栈 LCOF	Rust	55.2%	easy	Stack, Design
剑指 Offer 40	最小的k个数 LCOF	Go	57.3%	easy	Array, Divide and Conquer, Quickselect, Sorting, Heap (Priority Queue)
剑指 Offer 35	复杂链表的复制 LCOF	Go	71.6%	medium	Hash Table, Linked List
剑指 Offer 18	删除链表的节点 LCOF	Go	60.1%	easy	Linked List
剑指 Offer 24	反转链表 LCOF	Rust	74.3%	easy	Recursion, Linked List
剑指 Offer 16	数值的整数次方 LCOF	Go	34.5%	medium	Recursion, Math
剑指 Offer 22	链表中倒数第k个节点 LCOF	Go	80.2%	easy	Linked List, Two Pointers
剑指 Offer 29	顺时针打印矩阵 LCOF	Go	43.8%	easy	Array, Matrix, Simulation
剑指 Offer 15	二进制中1的个数 LCOF	Go	75.0%	easy	Bit Manipulation
剑指 Offer 21	调整数组顺序使奇数位于偶数前面 LCOF	Go	64.7%	easy	Array, Two Pointers, Sorting
剑指 Offer 20	表示数值的字符串 LCOF	Go	25.1%	medium	String
剑指 Offer 28	对称的二叉树 LCOF	Go	57.7%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
剑指 Offer 27	二叉树的镜像 LCOF	Go	79.4%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
剑指 Offer 26	树的子结构 LCOF	Go	46.7%	medium	Tree, Depth-First Search, Binary Tree
剑指 Offer 25	合并两个排序的链表 LCOF	Go	72.7%	easy	Recursion, Linked List
剑指 Offer 14- I	剪绳子 LCOF	Go	57.2%	medium	Math, Dynamic Programming
剑指 Offer 07	重建二叉树 LCOF	Go	70.2%	medium	Tree, Array, Hash Table, Divide and Conquer, Binary Tree
剑指 Offer 06	从尾到头打印链表 LCOF	Rust	75.0%	easy	Stack, Recursion, Linked List, Two Pointers
剑指 Offer 13	机器人的运动范围 LCOF	Python3	53.3%	medium	Depth-First Search, Breadth-First Search, Dynamic Programming
剑指 Offer 05	替换空格 LCOF	Rust	75.9%	easy	String
剑指 Offer 12	矩阵中的路径 LCOF	Go	45.3%	medium	Array, Backtracking, Matrix
剑指 Offer 11	旋转数组的最小数字 LCOF	Rust	49.2%	easy	Array, Binary Search
剑指 Offer 10- II	青蛙跳台阶问题 LCOF	Go	45.4%	easy	Memoization, Math, Dynamic Programming
剑指 Offer 04	二维数组中的查找 LCOF	Rust	40.1%	medium	Array, Binary Search, Divide and Conquer, Matrix
剑指 Offer 03	数组中重复的数字 LCOF	Go	67.9%	easy	Array, Hash Table, Sorting
剑指 Offer 10- I	斐波那契数列 LCOF	Go	36.2%	easy	Memoization, Math, Dynamic Programming
剑指 Offer 09	用两个栈实现队列 LCOF	Rust	70.9%	easy	Stack, Design, Queue
2212	Maximum Points in an Archery Competition	C++	46.5%	medium	Bit Manipulation, Recursion, Array, Enumeration
2211	Count Collisions on a Road	C++	38.5%	medium	Stack, String
2210	Count Hills and Valleys in an Array	Go	57.6%	easy	Array
2206	Divide Array Into Equal Pairs	Go	76.5%	easy	Bit Manipulation, Array, Hash Table, Counting
2196	Create Binary Tree From Descriptions	Python3	73.2%	medium	Tree, Depth-First Search, Breadth-First Search, Array, Hash Table, Binary Tree
2195	Append K Integers With Minimal Sum	Python3	22.9%	medium	Greedy, Array, Math, Sorting
2194	Cells in a Range on an Excel Sheet	Go	85.0%	easy	String
2182	Construct String With Repeat Limit	Java	47.7%	medium	Greedy, String, Counting, Heap (Priority Queue)
2181	Merge Nodes in Between Zeros	Go	86.3%	medium	Linked List, Simulation
2180	Count Integers With Even Digit Sum	Go	65.0%	easy	Math, Simulation
2187	Minimum Time to Complete Trips	Python3	26.0%	medium	Array, Binary Search
2186	Minimum Number of Steps to Make Two Strings Anagram II	Go	71.6%	medium	Hash Table, String, Counting
2185	Counting Words With a Given Prefix	Go	79.3%	easy	Array, String
2170	Minimum Operations to Make the Array Alternating	Python3	29.2%	medium	Greedy, Array, Hash Table, Counting
2169	Count Operations to Obtain Zero	Go	76.0%	easy	Math, Simulation
2177	Find Three Consecutive Integers That Sum to a Given Number	Go	68.9%	medium	Math, Simulation
2176	Count Equal and Divisible Pairs in an Array	Go	80.9%	easy	Array
2104	Sum of Subarray Ranges	Go	62.7%	medium	Stack, Array, Monotonic Stack
2100	Find Good Days to Rob the Bank	Go	48.6%	medium	Array, Dynamic Programming, Prefix Sum
2049	Count Nodes With the Highest Score	Go	51.7%	medium	Tree, Depth-First Search, Array, Binary Tree
2044	Count Number of Maximum Bitwise-OR Subsets	Go	81.9%	medium	Bit Manipulation, Array, Backtracking
2043	Simple Bank System	Go	67.6%	medium	Design, Array, Hash Table, Simulation
2055	Plates Between Candles	Go	43.2%	medium	Array, String, Binary Search, Prefix Sum
2028	Find Missing Observations	Go	50.7%	medium	Array, Math, Simulation
2039	The Time When the Network Becomes Idle	Go	55.8%	medium	Breadth-First Search, Graph, Array
2038	Remove Colored Pieces if Both Neighbors are the Same Color	Go	63.7%	medium	Greedy, Math, String, Game Theory
2016	Maximum Difference Between Increasing Elements	Go	60.3%	easy	Array
2024	Maximize the Confusion of an Exam	Go	57.2%	medium	String, Binary Search, Prefix Sum, Sliding Window
2000	Reverse Prefix of Word	Go, Rust	79.5%	easy	Two Pointers, String
2006	Count Number of Pairs With Absolute Difference K	Go, Rust	85.5%	easy	Array, Hash Table, Counting
1984	Minimum Difference Between Highest and Lowest of K Scores	Go	62.9%	easy	Array, Sorting, Sliding Window
1994	The Number of Good Subsets	Go	56.8%	hard	Bit Manipulation, Array, Math, Dynamic Programming, Bitmask
1791	Find Center of Star Graph	Go	84.0%	easy	Graph
1765	Map of Highest Peak	Rust	66.5%	medium	Breadth-First Search, Array, Matrix
1763	Longest Nice Substring	Rust	69.1%	easy	Bit Manipulation, Hash Table, String, Sliding Window
1748	Sum of Unique Elements	Go, Rust	79.0%	easy	Array, Hash Table, Counting
1725	Number Of Rectangles That Can Form The Largest Square	Go, Rust	83.4%	easy	Array
1719	Number Of Ways To Reconstruct A Tree	Go	69.8%	hard	Tree, Graph, Topological Sort
1631	Path With Minimum Effort	Go	49.9%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, Binary Search, Matrix, Heap (Priority Queue)
1601	Maximum Number of Achievable Transfer Requests	Go	61.6%	hard	Bit Manipulation, Array, Backtracking, Enumeration
1606	Find Servers That Handled Most Number of Requests	Go	48.2%	hard	Greedy, Array, Ordered Set, Heap (Priority Queue)
1584	Min Cost to Connect All Points	Go	66.2%	medium	Union Find, Array, Minimum Spanning Tree
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Go	61.9%	hard	Union Find, Graph
1588	Sum of All Odd Length Subarrays	Go	83.9%	easy	Array, Math, Prefix Sum
1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	Go	68.5%	hard	Union Find, Graph, Minimum Spanning Tree, Sorting, Strongly Connected Component
1480	Running Sum of 1d Array	Go	86.9%	easy	Array, Prefix Sum
1447	Simplified Fractions	Go, Rust	67.8%	medium	Math, String, Number Theory
1423	Maximum Points You Can Obtain from Cards	Go	55.5%	medium	Array, Prefix Sum, Sliding Window
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Rust	70.6%	medium	Greedy
1380	Lucky Numbers in a Matrix	Go	77.0%	easy	Array, Matrix
1342	Number of Steps to Reduce a Number to Zero	Rust	82.6%	easy	Bit Manipulation, Math
1319	Number of Operations to Make Network Connected	Go	61.9%	medium	Depth-First Search, Breadth-First Search, Union Find, Graph
2215	Find the Difference of Two Arrays	Go	66.8%	easy	Array, Hash Table
2217	Find Palindrome With Fixed Length	C++	32.0%	medium	Array, Math
2216	Minimum Deletions to Make Array Beautiful	Go	46.8%	medium	Stack, Greedy, Array
1232	Check If It Is a Straight Line	Go	46.5%	easy	Geometry, Array, Math
1221	Split a String in Balanced Strings	Go	84.4%	easy	Greedy, String, Counting
1219	Path with Maximum Gold	Go, Rust	69.7%	medium	Array, Backtracking, Matrix
1218	Longest Arithmetic Subsequence of Given Difference	Go	51.5%	medium	Array, Hash Table, Dynamic Programming
1706	Where Will the Ball Fall	Go	69.3%	medium	Depth-First Search, Array, Dynamic Programming, Matrix, Simulation
1208	Get Equal Substrings Within Budget	Go	49.8%	medium	String, Binary Search, Prefix Sum, Sliding Window
1203	Sort Items by Groups Respecting Dependencies	Go	61.8%	hard	Depth-First Search, Breadth-First Search, Graph, Topological Sort
1202	Smallest String With Swaps❤️	Go	50.5%	medium	Depth-First Search, Breadth-First Search, Union Find, Hash Table, String
1405	Longest Happy String	Rust	64.0%	medium	Greedy, String, Heap (Priority Queue)
1189	Maximum Number of Balloons	Go	68.7%	easy	Hash Table, String, Counting
1128	Number of Equivalent Domino Pairs	Go	54.3%	easy	Array, Hash Table, Counting
1046	Last Stone Weight	Go	65.8%	easy	Array, Heap (Priority Queue)
1020	Number of Enclaves	Go	61.0%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, Matrix
1018	Binary Prefix Divisible By 5	Go	51.4%	easy	Array
1004	Max Consecutive Ones III	Go	60.0%	medium	Array, Binary Search, Prefix Sum, Sliding Window
1001	Grid Illumination	Go	45.1%	hard	Array, Hash Table
995	Minimum Number of K Consecutive Bit Flips	Go	53.4%	hard	Bit Manipulation, Array, Prefix Sum, Sliding Window
992	Subarrays with K Different Integers	Go	46.2%	hard	Array, Hash Table, Counting, Sliding Window
989	Add to Array-Form of Integer	Go	46.9%	easy	Array, Math
978	Longest Turbulent Subarray	Go	47.3%	medium	Array, Dynamic Programming, Sliding Window
509	Fibonacci Number	Go	66.6%	easy	Recursion, Memoization, Math, Dynamic Programming
969	Pancake Sorting	Go	67.9%	medium	Greedy, Array, Two Pointers, Sorting
959	Regions Cut By Slashes	Go	74.2%	medium	Depth-First Search, Breadth-First Search, Union Find, Graph
954	Array of Doubled Pairs	Go	38.9%	medium	Greedy, Array, Hash Table, Sorting
947	Most Stones Removed with Same Row or Column	Go	61.2%	medium	Depth-First Search, Union Find, Graph
917	Reverse Only Letters	Go	60.3%	easy	Two Pointers, String
888	Fair Candy Swap	Go	64.0%	easy	Array, Hash Table, Binary Search, Sorting
887	Super Egg Drop	Go	29.6%	hard	Math, Binary Search, Dynamic Programming
881	Boats to Save People	Go	53.8%	medium	Greedy, Array, Two Pointers, Sorting
869	Reordered Power of 2	Go	64.1%	medium	Math, Counting, Enumeration, Sorting
861	Score After Flipping Matrix	Go	80.8%	medium	Greedy, Bit Manipulation, Array, Matrix
860	Lemonade Change	Go	58.5%	easy	Greedy, Array
842	Split Array into Fibonacci Sequence	Go	48.6%	medium	String, Backtracking
839	Similar String Groups	Go	57.9%	hard	Depth-First Search, Breadth-First Search, Union Find, Array, String
838	Push Dominoes	Go	55.4%	medium	Two Pointers, String, Dynamic Programming
830	Positions of Large Groups	Go	54.3%	easy	String
803	Bricks Falling When Hit	Go	47.7%	hard	Union Find, Array, Matrix
798	Smallest Rotation with Highest Score	Go	61.4%	hard	Array, Prefix Sum
797	All Paths From Source to Target	Go	78.8%	medium	Depth-First Search, Breadth-First Search, Graph, Backtracking
796	Rotate String	Go	63.0%	easy	String, String Matching
787	Cheapest Flights Within K Stops	Go	38.9%	medium	Depth-First Search, Breadth-First Search, Graph, Dynamic Programming, Shortest Path, Heap (Priority Queue)
778	Swim in Rising Water	Go	58.9%	hard	Depth-First Search, Breadth-First Search, Union Find, Array, Binary Search, Matrix, Heap (Priority Queue)
703	Kth Largest Element in a Stream	Go	51.9%	easy	Tree, Design, Binary Search Tree, Binary Tree, Data Stream, Heap (Priority Queue)
766	Toeplitz Matrix	Go	70.5%	easy	Array, Matrix
590	N-ary Tree Postorder Traversal	Go	77.8%	easy	Stack, Tree, Depth-First Search
589	N-ary Tree Preorder Traversal	Go	76.1%	easy	Stack, Tree, Depth-First Search
765	Couples Holding Hands	Go	66.3%	hard	Greedy, Depth-First Search, Breadth-First Search, Union Find, Graph
763	Partition Labels	Go	76.6%	medium	Greedy, Hash Table, Two Pointers, String
762	Prime Number of Set Bits in Binary Representation	Go	75.7%	easy	Bit Manipulation, Math
746	Min Cost Climbing Stairs	Go	61.6%	easy	Array, Dynamic Programming
744	Find Smallest Letter Greater Than Target	Go	49.7%	easy	Array, Binary Search
739	Daily Temperatures❤️	Go	69.0%	medium	Stack, Array, Monotonic Stack
738	Monotone Increasing Digits	Go	50.0%	medium	Greedy, Math
728	Self Dividing Numbers	Go	78.9%	easy	Math
724	Find Pivot Index	Go	48.4%	easy	Array, Prefix Sum
721	Accounts Merge	Go	47.4%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, String
720	Longest Word in Dictionary	Go	51.9%	easy	Trie, Array, Hash Table, String, Sorting
717	1-bit and 2-bit Characters	Go	55.4%	easy	Array
714	Best Time to Buy and Sell Stock with Transaction Fee	Go	73.7%	medium	Greedy, Array, Dynamic Programming
713	Subarray Product Less Than K	Go	44.0%	medium	Array, Sliding Window
695	Max Area of Island	Go	67.4%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, Matrix
693	Binary Number with Alternating Bits	Go	65.4%	easy	Bit Manipulation
688	Knight Probability in Chessboard	Go	58.3%	medium	Dynamic Programming
687	Longest Univalue Path	Go	44.8%	medium	Tree, Depth-First Search, Binary Tree
685	Redundant Connection II	Go	42.3%	hard	Depth-First Search, Breadth-First Search, Union Find, Graph
684	Redundant Connection	Go	66.9%	medium	Depth-First Search, Breadth-First Search, Union Find, Graph
682	Baseball Game	Go	72.3%	easy	Stack, Array, Simulation
680	Valid Palindrome II	Go	40.1%	easy	Greedy, Two Pointers, String
677	Map Sum Pairs	Go	66.5%	medium	Design, Trie, Hash Table, String
674	Longest Continuous Increasing Subsequence	Go	52.2%	easy	Array
671	Second Minimum Node In a Binary Tree	Go	48.3%	easy	Tree, Depth-First Search, Binary Tree
669	Trim a Binary Search Tree	Go	66.6%	medium	Tree, Depth-First Search, Binary Search Tree, Binary Tree
665	Non-decreasing Array	Go	27.4%	medium	Array
661	Image Smoother	Go	64.5%	easy	Array, Matrix
653	Two Sum IV - Input is a BST	Go	63.0%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Search Tree, Hash Table, Two Pointers, Binary Tree
649	Dota2 Senate	Go	47.9%	medium	Greedy, Queue, String
647	Palindromic Substrings	Go	66.2%	medium	String, Dynamic Programming
643	Maximum Average Subarray I❤️	Go	44.5%	easy	Array, Sliding Window
638	Shopping Offers	Go	64.4%	medium	Bit Manipulation, Memoization, Array, Dynamic Programming, Backtracking, Bitmask
637	Average of Levels in Binary Tree	Go	69.4%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
633	Sum of Square Numbers	Go	39.0%	medium	Math, Two Pointers, Binary Search
629	K Inverse Pairs Array	Go	51.9%	hard	Dynamic Programming
628	Maximum Product of Three Numbers	Go	52.4%	easy	Array, Math, Sorting
627	Swap Salary	SQL	81.4%	easy	Database
626	Exchange Seats	SQL	68.6%	medium	Database
621	Task Scheduler	Go	58.1%	medium	Greedy, Array, Hash Table, Counting, Sorting, Heap (Priority Queue)
620	Not Boring Movies	SQL	77.2%	easy	Database
617	Merge Two Binary Trees	Go	78.9%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
606	Construct String from Binary Tree	Go	63.1%	easy	Tree, Depth-First Search, String, Binary Tree
605	Can Place Flowers	Go	33.0%	easy	Greedy, Array
599	Minimum Index Sum of Two Lists	Go	57.3%	easy	Array, Hash Table, String
598	Range Addition II	Go	57.2%	easy	Array, Math
596	Classes More Than 5 Students	SQL	45.5%	easy	Database
595	Big Countries	SQL	74.9%	easy	Database
581	Shortest Unsorted Continuous Subarray	Go	41.0%	medium	Stack, Greedy, Array, Two Pointers, Sorting, Monotonic Stack
575	Distribute Candies	Go	71.0%	easy	Array, Hash Table
572	Subtree of Another Tree	Go	47.5%	easy	Tree, Depth-First Search, Binary Tree, String Matching, Hash Function
567	Permutation in String	Go	43.7%	medium	Hash Table, Two Pointers, String, Sliding Window
566	Reshape the Matrix	Go	66.6%	easy	Array, Matrix, Simulation
564	Find the Closest Palindrome	Go	30.4%	hard	Math, String
561	Array Partition I	Go	78.0%	easy	Greedy, Array, Counting Sort, Sorting
560	Subarray Sum Equals K❤️	Go	45.0%	medium	Array, Hash Table, Prefix Sum
553	Optimal Division	Go	65.0%	medium	Array, Math, Dynamic Programming
547	Number of Provinces	Go	62.0%	medium	Depth-First Search, Breadth-First Search, Union Find, Graph
543	Diameter of Binary Tree❤️	Go	56.7%	easy	Tree, Depth-First Search, Binary Tree
540	Single Element in a Sorted Array	Go	60.8%	medium	Array, Binary Search
538	Convert BST to Greater Tree	Go	73.2%	medium	Tree, Depth-First Search, Binary Search Tree, Binary Tree
537	Complex Number Multiplication	Go	74.9%	medium	Math, String, Simulation
525	Contiguous Array	Go	54.1%	medium	Array, Hash Table, Prefix Sum
524	Longest Word in Dictionary through Deleting	Go	49.8%	medium	Array, Two Pointers, String, Sorting
521	Longest Uncommon Subsequence I	Go	73.8%	easy	String
520	Detect Capital	Go	57.4%	easy	String
513	Find Bottom Left Tree Value	Go	73.1%	medium	Tree, Depth-First Search, Breadth-First Search, Binary Tree
507	Perfect Number	C	49.0%	easy	Math
504	Base 7	Go	52.2%	easy	Math
503	Next Greater Element II	Go	65.0%	medium	Stack, Array, Monotonic Stack
502	IPO	Go	44.3%	hard	Greedy, Array, Sorting, Heap (Priority Queue)
501	Find Mode in Binary Search Tree	Go	53.0%	easy	Tree, Depth-First Search, Binary Search Tree, Binary Tree
500	Keyboard Row	Go	74.4%	easy	Array, Hash Table, String
496	Next Greater Element I	Go	71.0%	easy	Stack, Array, Hash Table, Monotonic Stack
495	Teemo Attacking	Go	60.4%	easy	Array, Simulation
494	Target Sum	Go	49.0%	medium	Array, Dynamic Programming, Backtracking
492	Construct the Rectangle	Go	60.7%	easy	Math
488	Zuma Game	Go	51.3%	hard	Breadth-First Search, Memoization, String, Dynamic Programming
485	Max Consecutive Ones	Go	61.0%	easy	Array
480	Sliding Window Median	Go	44.7%	hard	Array, Hash Table, Sliding Window, Heap (Priority Queue)
476	Number Complement	Go	71.1%	easy	Bit Manipulation
461	Hamming Distance	Go	81.5%	easy	Bit Manipulation
460	LFU Cache	Go	44.0%	hard	Design, Hash Table, Linked List, Doubly-Linked List
455	Assign Cookies	Go	57.3%	easy	Greedy, Array, Sorting
453	Minimum Moves to Equal Array Elements	Go	61.3%	easy	Array, Math
452	Minimum Number of Arrows to Burst Balloons	Go	50.7%	medium	Greedy, Array, Sorting
451	Sort Characters By Frequency	Go	71.6%	medium	Hash Table, String, Bucket Sort, Counting, Sorting, Heap (Priority Queue)
448	Find All Numbers Disappeared in an Array	Go	65.4%	easy	Array, Hash Table
447	Number of Boomerangs	Go	66.5%	medium	Array, Hash Table, Math
441	Arranging Coins	Go	45.8%	easy	Math, Binary Search
440	K-th Smallest in Lexicographical Order	Go	42.7%	hard	Trie
438	Find All Anagrams in a String❤️	Go	54.4%	medium	Hash Table, String, Sliding Window
437	Path Sum III❤️	Go	57.1%	medium	Tree, Depth-First Search, Binary Tree
435	Non-overlapping Intervals	Go	50.7%	medium	Greedy, Array, Dynamic Programming, Sorting
432	All O`one Data Structure	Go	47.2%	hard	Design, Hash Table, Linked List, Doubly-Linked List
424	Longest Repeating Character Replacement	Go	53.7%	medium	Hash Table, String, Sliding Window
420	Strong Password Checker	Go	39.4%	hard	Greedy, String, Heap (Priority Queue)
416	Partition Equal Subset Sum❤️	Go	51.5%	medium	Array, Dynamic Programming
412	Fizz Buzz	Go	71.3%	easy	Math, String, Simulation
407	Trapping Rain Water II	Go	57.8%	hard	Breadth-First Search, Array, Matrix, Heap (Priority Queue)
406	Queue Reconstruction by Height	Go	74.8%	medium	Greedy, Binary Indexed Tree, Segment Tree, Array, Sorting
404	Sum of Left Leaves	Go	60.3%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
399	Evaluate Division	Go	59.2%	medium	Depth-First Search, Breadth-First Search, Union Find, Graph, Array, Shortest Path
395	Longest Substring with At Least K Repeating Characters❤️	Go	52.3%	medium	Hash Table, String, Divide and Conquer, Sliding Window
394	Decode String❤️	Go	56.0%	medium	Stack, Recursion, String
393	UTF-8 Validation	Go	43.9%	medium	Bit Manipulation, Array
392	Is Subsequence	Go	52.1%	easy	Two Pointers, String, Dynamic Programming
389	Find the Difference	Go	68.5%	easy	Bit Manipulation, Hash Table, String, Sorting
387	First Unique Character in a String	Go	54.7%	easy	Queue, Hash Table, String, Counting
376	Wiggle Subsequence	Go	47.0%	medium	Greedy, Array, Dynamic Programming
375	Guess Number Higher or Lower II	Go	60.7%	medium	Math, Dynamic Programming, Game Theory
367	Valid Perfect Square	Go	44.8%	easy	Math, Binary Search
354	Russian Doll Envelopes	Go	42.9%	hard	Array, Binary Search, Dynamic Programming, Sorting
352	Data Stream as Disjoint Intervals	Go	67.6%	hard	Design, Binary Search, Ordered Set
349	Intersection of Two Arrays	Go	74.0%	easy	Array, Hash Table, Two Pointers, Binary Search, Sorting
347	Top K Frequent Elements	Go	62.9%	medium	Array, Hash Table, Divide and Conquer, Bucket Sort, Counting, Quickselect, Sorting, Heap (Priority Queue)
345	Reverse Vowels of a String	Go	54.2%	easy	Two Pointers, String
344	Reverse String	Go	78.4%	easy	Recursion, Two Pointers, String
338	Counting Bits	Go	78.6%	easy	Bit Manipulation, Dynamic Programming
337	House Robber III	Go	60.7%	medium	Tree, Depth-First Search, Dynamic Programming, Binary Tree
335	Self Crossing	Go	42.9%	hard	Geometry, Array, Math
330	Patching Array	Go	53.0%	hard	Greedy, Array
328	Odd Even Linked List	Go	65.4%	medium	Linked List
326	Power of Three	Go	50.6%	easy	Recursion, Math
322	Coin Change	Go	45.5%	medium	Breadth-First Search, Array, Dynamic Programming
319	Bulb Switcher	Go	57.3%	medium	Brainteaser, Math
318	Maximum Product of Word Lengths	Go	73.8%	medium	Bit Manipulation, Array, String
316	Remove Duplicate Letters	Go	47.8%	medium	Stack, Greedy, String, Monotonic Stack
310	Minimum Height Trees	Go	43.2%	medium	Depth-First Search, Breadth-First Search, Graph, Topological Sort
309	Best Time to Buy and Sell Stock with Cooldown	Go	62.7%	medium	Array, Dynamic Programming
307	Range Sum Query - Mutable	Go	50.6%	medium	Design, Binary Indexed Tree, Segment Tree, Array
304	Range Sum Query 2D - Immutable	Go	58.3%	medium	Design, Array, Matrix, Prefix Sum
303	Range Sum Query - Immutable	Go	74.6%	easy	Design, Array, Prefix Sum
301	Remove Invalid Parentheses	Go	55.0%	hard	Breadth-First Search, String, Backtracking
300	Longest Increasing Subsequence❤️	Go	53.3%	medium	Array, Binary Search, Dynamic Programming
299	Bulls and Cows	Go	56.6%	medium	Hash Table, String, Counting
295	Find Median from Data Stream	Go	52.6%	hard	Design, Two Pointers, Data Stream, Sorting, Heap (Priority Queue)
290	Word Pattern	Go	45.3%	easy	Hash Table, String
287	Find the Duplicate Number	Go	65.0%	medium	Bit Manipulation, Array, Two Pointers, Binary Search
283	Move Zeroes	Go	63.9%	easy	Array, Two Pointers
282	Expression Add Operators	Go	48.0%	hard	Math, String, Backtracking
279	Perfect Squares	Go	64.6%	medium	Breadth-First Search, Math, Dynamic Programming
278	First Bad Version	Java	45.1%	easy	Binary Search, Interactive
273	Integer to English Words	Go	36.6%	hard	Recursion, Math, String
268	Missing Number	Go	65.6%	easy	Bit Manipulation, Array, Hash Table, Math, Sorting
260	Single Number III	Go	73.5%	medium	Bit Manipulation, Array
258	Add Digits	Go	71.0%	easy	Math, Number Theory, Simulation
242	Valid Anagram	Go	65.2%	easy	Hash Table, String, Sorting
241	Different Ways to Add Parentheses	Go	73.5%	medium	Recursion, Memoization, Math, String, Dynamic Programming
240	Search a 2D Matrix II	Go	50.9%	medium	Array, Binary Search, Divide and Conquer, Matrix
239	Sliding Window Maximum	Go	49.8%	hard	Queue, Array, Sliding Window, Monotonic Queue, Heap (Priority Queue)
238	Product of Array Except Self	Go	73.3%	medium	Array, Prefix Sum
237	Delete Node in a Linked List	Go	85.9%	easy	Linked List
236	Lowest Common Ancestor of a Binary Tree	Go	68.9%	medium	Tree, Depth-First Search, Binary Tree
234	Palindrome Linked List	Go	51.3%	easy	Stack, Recursion, Linked List, Two Pointers
232	Implement Queue using Stacks	Go	68.8%	easy	Stack, Design, Queue
230	Kth Smallest Element in a BST	Go	75.3%	medium	Tree, Depth-First Search, Binary Search Tree, Binary Tree
229	Majority Element II	Go	53.5%	medium	Array, Hash Table, Counting, Sorting
228	Summary Ranges	Go	56.8%	easy	Array
226	Invert Binary Tree	Go	79.1%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
225	Implement Stack using Queues	Go	67.6%	easy	Stack, Design, Queue
221	Maximal Square	Go	48.8%	medium	Array, Dynamic Programming, Matrix
220	Contains Duplicate III	Go	28.9%	medium	Array, Bucket Sort, Ordered Set, Sorting, Sliding Window
218	The Skyline Problem❤️	Go	54.5%	hard	Binary Indexed Tree, Segment Tree, Array, Divide and Conquer, Ordered Set, Line Sweep, Heap (Priority Queue)
217	Contains Duplicate	Go	55.6%	easy	Array, Hash Table, Sorting
215	Kth Largest Element in an Array	Go	64.7%	medium	Array, Divide and Conquer, Quickselect, Sorting, Heap (Priority Queue)
213	House Robber II	Go	43.6%	medium	Array, Dynamic Programming
212	Word Search II	Go	45.8%	hard	Trie, Array, String, Backtracking, Matrix
211	Design Add and Search Words Data Structure	Go	51.0%	medium	Depth-First Search, Design, Trie, String
210	Course Schedule II	Go	55.4%	medium	Depth-First Search, Breadth-First Search, Graph, Topological Sort
209	Minimum Size Subarray Sum	Go	48.5%	medium	Array, Binary Search, Prefix Sum, Sliding Window
208	Implement Trie (Prefix Tree)❤️	Go	71.9%	medium	Design, Trie, Hash Table, String
207	Course Schedule	Go	53.9%	medium	Depth-First Search, Breadth-First Search, Graph, Topological Sort
206	Reverse Linked List	Go, php	72.9%	easy	Recursion, Linked List
205	Isomorphic Strings	Go	49.8%	easy	Hash Table, String
204	Count Primes	Go	37.5%	medium	Array, Math, Enumeration, Number Theory
200	Number of Islands	Go	57.5%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, Matrix
198	House Robber❤️	Go	53.0%	medium	Array, Dynamic Programming
196	Delete Duplicate Emails	SQL	66.9%	easy	Database
191	Number of 1 Bits	Go	75.7%	easy	Bit Manipulation
190	Reverse Bits	Go	70.9%	easy	Bit Manipulation, Divide and Conquer
189	Rotate Array	Go	44.3%	medium	Array, Math, Two Pointers
188	Best Time to Buy and Sell Stock IV	Go	41.1%	hard	Array, Dynamic Programming
184	Department Highest Salary	SQL	49.2%	medium	Database
183	Customers Who Never Order	SQL	67.2%	easy	Database
182	Duplicate Emails	SQL	79.3%	easy	Database
181	Employees Earning More Than Their Managers	SQL	69.2%	easy	Database
180	Consecutive Numbers	SQL	48.3%	medium	Database
178	Rank Scores	SQL	60.4%	medium	Database
177	Nth Highest Salary	SQL	46.4%	medium	Database
176	Second Highest Salary	SQL	35.6%	medium	Database
175	Combine Two Tables	SQL	73.5%	easy	Database
172	Factorial Trailing Zeroes	Go	48.2%	medium	Math
169	Majority Element	Go	66.7%	easy	Array, Hash Table, Divide and Conquer, Counting, Sorting
167	Two Sum II - Input Array Is Sorted	Go	58.5%	medium	Array, Two Pointers, Binary Search
166	Fraction to Recurring Decimal	Go	33.3%	medium	Hash Table, Math, String
160	Intersection of Two Linked Lists	Go	62.6%	easy	Hash Table, Linked List, Two Pointers
155	Min Stack	Go	58.0%	easy	Stack, Design
153	Find Minimum in Rotated Sorted Array	Go	56.9%	medium	Array, Binary Search
152	Maximum Product Subarray	Go	42.5%	medium	Array, Dynamic Programming
149	Max Points on a Line❤️	Go	36.5%	hard	Geometry, Array, Hash Table, Math
148	Sort List	Go	66.5%	medium	Linked List, Two Pointers, Divide and Conquer, Sorting, Merge Sort
146	LRU Cache❤️	Go	52.7%	medium	Design, Hash Table, Linked List, Doubly-Linked List
145	Binary Tree Postorder Traversal	Go	75.7%	easy	Stack, Tree, Depth-First Search, Binary Tree
144	Binary Tree Preorder Traversal	Go	71.0%	easy	Stack, Tree, Depth-First Search, Binary Tree
142	Linked List Cycle II	Go	56.0%	medium	Hash Table, Linked List, Two Pointers
141	Linked List Cycle	Go	51.4%	easy	Hash Table, Linked List, Two Pointers
140	Word Break II	Go	52.4%	hard	Trie, Memoization, Hash Table, String, Dynamic Programming, Backtracking
139	Word Break❤️	Go	52.9%	medium	Trie, Memoization, Hash Table, String, Dynamic Programming
137	Single Number II	Go	72.1%	medium	Bit Manipulation, Array
136	Single Number	Go	72.1%	easy	Bit Manipulation, Array
135	Candy	Go	48.9%	hard	Greedy, Array
131	Palindrome Partitioning	Go	72.8%	medium	String, Dynamic Programming, Backtracking
130	Surrounded Regions	Go	45.5%	medium	Depth-First Search, Breadth-First Search, Union Find, Array, Matrix
127	Word Ladder	Go	47.4%	hard	Breadth-First Search, Hash Table, String
125	Valid Palindrome	Go	46.9%	easy	Two Pointers, String
123	Best Time to Buy and Sell Stock III	Go	55.7%	hard	Array, Dynamic Programming
122	Best Time to Buy and Sell Stock II	Go	70.2%	medium	Greedy, Array, Dynamic Programming
121	Best Time to Buy and Sell Stock❤️	Go	57.7%	easy	Array, Dynamic Programming
119	Pascal’s Triangle II	Go	68.2%	easy	Array, Dynamic Programming
118	Pascal’s Triangle	Go	74.6%	easy	Array, Dynamic Programming
114	Flatten Binary Tree to Linked List	Go	72.8%	medium	Stack, Tree, Depth-First Search, Linked List, Binary Tree
112	Path Sum	Go	53.2%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
111	Minimum Depth of Binary Tree	Go	50.1%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
110	Balanced Binary Tree	Go	56.9%	easy	Tree, Depth-First Search, Binary Tree
105	Construct Binary Tree from Preorder and Inorder Traversal	Go	71.0%	medium	Tree, Array, Hash Table, Divide and Conquer, Binary Tree
104	Maximum Depth of Binary Tree❤️	Go	76.9%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
103	Binary Tree Zigzag Level Order Traversal	Go	57.3%	medium	Tree, Breadth-First Search, Binary Tree
102	Binary Tree Level Order Traversal	Go	64.7%	medium	Tree, Breadth-First Search, Binary Tree
101	Symmetric Tree❤️	Go	57.5%	easy	Tree, Depth-First Search, Breadth-First Search, Binary Tree
98	Validate Binary Search Tree❤️	Go	35.9%	medium	Tree, Depth-First Search, Binary Search Tree, Binary Tree
96	Unique Binary Search Trees❤️	Go	70.2%	medium	Tree, Binary Search Tree, Math, Dynamic Programming, Binary Tree
95	Unique Binary Search Trees II	Go	71.8%	medium	Tree, Binary Search Tree, Dynamic Programming, Backtracking, Binary Tree
94	Binary Tree Inorder Traversal	Go	75.8%	easy	Stack, Tree, Depth-First Search, Binary Tree
88	Merge Sorted Array	Go	52.2%	easy	Array, Two Pointers, Sorting
87	Scramble String	Go	48.2%	hard	String, Dynamic Programming
86	Partition List	Go	63.2%	medium	Linked List, Two Pointers
85	Maximal Rectangle	Go	52.8%	hard	Stack, Array, Dynamic Programming, Matrix, Monotonic Stack
83	Remove Duplicates from Sorted List	Go	53.6%	easy	Linked List
79	Word Search❤️	Go	46.2%	medium	Array, Backtracking, Matrix
78	Subsets	Go	80.5%	medium	Bit Manipulation, Array, Backtracking
76	Minimum Window Substring	Go	44.0%	hard	Hash Table, String, Sliding Window
75	Sort Colors❤️	Go	60.1%	medium	Array, Two Pointers, Sorting
70	Climbing Stairs❤️	Go	53.6%	easy	Memoization, Math, Dynamic Programming
69	Sqrt(x)	Go	38.9%	easy	Math, Binary Search
67	Add Binary	Go	53.9%	easy	Bit Manipulation, Math, String, Simulation
66	Plus One	Go	45.9%	easy	Array, Math
64	Minimum Path Sum	Go	69.2%	medium	Array, Dynamic Programming, Matrix
62	Unique Paths	Go	67.0%	medium	Math, Dynamic Programming, Combinatorics
56	Merge Intervals	Go	48.4%	medium	Array, Sorting
55	Jump Game❤️	Go	43.5%	medium	Greedy, Array, Dynamic Programming
53	Maximum Subarray❤️	Go	54.9%	easy	Array, Divide and Conquer, Dynamic Programming
49	Group Anagrams	Go	67.2%	medium	Hash Table, String, Sorting
48	Rotate Image	Go	74.0%	medium	Array, Math, Matrix
46	Permutations❤️	Go	78.5%	medium	Array, Backtracking
39	Combination Sum❤️	Go	72.8%	medium	Array, Backtracking
38	Count and Say	Go	59.9%	medium	String
34	Find First and Last Position of Element in Sorted Array	Go	42.2%	medium	Array, Binary Search
33	Search in Rotated Sorted Array	Go	43.5%	medium	Array, Binary Search
31	Next Permutation❤️	Go	37.5%	medium	Array, Two Pointers
29	Divide Two Integers	Go	22.1%	medium	Bit Manipulation, Math
22	Generate Parentheses	Go	77.4%	medium	String, Dynamic Programming, Backtracking
21	Merge Two Sorted Lists	Go	66.7%	easy	Recursion, Linked List
20	Valid Parentheses❤️	Go	44.5%	easy	Stack, String
19	Remove Nth Node From End of List❤️	Go	43.9%	medium	Linked List, Two Pointers
17	Letter Combinations of a Phone Number❤️	Go	57.7%	medium	Hash Table, String, Backtracking
15	3Sum❤️	Go	35.2%	medium	Array, Two Pointers, Sorting
11	Container With Most Water❤️	Go	61.5%	medium	Greedy, Array, Two Pointers
6	ZigZag Conversion	Go	51.9%	medium	String
5	Longest Palindromic Substring❤️	Go, Rust	36.5%	medium	String, Dynamic Programming
3	Longest Substring Without Repeating Characters	Go, Rust	38.7%	medium	Hash Table, String, Sliding Window
2	Add Two Numbers	Go, Rust	41.6%	medium	Recursion, Linked List, Math
1	Two Sum	Go, Rust	52.5%	easy	Array, Hash Table