LeetCode-Solutions

💚My own LeetCode solutions

No.	Problem	LeetCode	力扣	Python	Go	Solution	Difficulty	Tag
0017	Letter Combinations of a Phone Number	LeetCode	力扣	Python		CSDN	Medium	回溯、暴力
0034	Find First and Last Position of Element in Sorted Array	LeetCode	力扣	Python		CSDN	Medium	二分
0039	Combination Sum	LeetCode	力扣	Python		CSDN	Medium	回溯
0040	Combination Sum II	LeetCode	力扣	Python		CSDN	Medium	回溯
0046	Permutations	LeetCode	力扣	Python		CSDN	Medium	回溯
0047	Permutations II	LeetCode	力扣	Python		CSDN	Medium	递归、回溯
0051	N-Queens	LeetCode	力扣	Python		CSDN	Hard	回溯
0053	Maximum Subarray	LeetCode	力扣	Python		CSDN	Easy	动态规划
0069	Sqrt(x)	LeetCode	力扣	Python		CSDN	Easy	二分、牛顿迭代
0070	Climbing Stairs	LeetCode	力扣	Python		CSDN	Easy	动态规划
0075	Sort Colors	LeetCode	力扣	Python		CSDN	Medium	荷兰旗
0077	Combinations	LeetCode	力扣	Python		CSDN	Medium	回溯
0079	Word Search	LeetCode	力扣	Python		CSDN	Medium	回溯
0088	Merge Sorted Array	LeetCode	力扣	Python		CSDN	Easy	双指针
0090	Subsets II	LeetCode	力扣	Python		CSDN	Medium	回溯
0093	Restore IP Addresses	LeetCode	力扣	Python		CSDN	Medium	回溯、暴力
0095	Unique Binary Search Trees II	LeetCode	力扣	Python		CSDN	Medium	分治、DFS
0098	Validate Binary Search Tree	LeetCode	力扣	Python		CSDN	Medium	二叉树
0100	Same Tree	LeetCode	力扣	Python		CSDN	Easy	二叉树
0102	Binary Tree Level Order Traversal	LeetCode	力扣	Python		CSDN	Medium	二叉树、BFS
0103	Binary Tree Zigzag Level Order Traversal 二叉树的锯齿形层序遍历	LeetCode	力扣	Python		CSDN	Medium	二叉树、BFS
0105	Construct Binary Tree from Preorder and Inorder Traversal	LeetCode	力扣	Python		CSDN	Medium	二叉树、递归
0106	Construct Binary Tree from Inorder and Postorder Traversal	LeetCode	力扣	Python		CSDN	Medium	二叉树、递归
0111	Minimum Depth of Binary Tree	LeetCode	力扣	Python		CSDN	Easy	二叉树
0113	Path Sum II	LeetCode	力扣	Python		CSDN	Medium	回溯
0114	Flatten Binary Tree to Linked List二叉树展开为链表	LeetCode	力扣	Python	Go	CSDN	Medium	二叉树
0116	Populating Next Right Pointers in Each Node填充每个节点的下一个右侧节点指针	LeetCode	力扣	Python	Go	CSDN	Medium	二叉树、递归
0121	Best Time to Buy and Sell Stock	LeetCode	力扣	Python		CSDN	Easy	贪心
0122	Best Time to Buy and Sell Stock II	LeetCode	力扣	Python		CSDN	Easy	贪心
0123	Best Time to Buy and Sell Stock III	LeetCode	力扣	Python		CSDN	Hard	动态规划
0127	Word Ladder	LeetCode	力扣	Python		CSDN	Medium	BFS
0129	Sum Root to Leaf Numbers求根到叶子节点数字之和	LeetCode	力扣	Python		CSDN	Medium	二叉树
0130	Surrounded Regions	LeetCode	力扣	Python		CSDN	Medium	DFS
0141	Linked List Cycle	LeetCode	力扣	Python		CSDN	Easy	双指针
0144	Binary Tree Preorder Traversal二叉树的前序遍历	LeetCode	力扣	Python		CSDN	Medium	二叉树
0145	Binary Tree Postorder Traversal二叉树的后序遍历	LeetCode	力扣	Python		CSDN	Medium	二叉树
0153	Find Minimum in Rotated Sorted Array	LeetCode	力扣	Python		CSDN	Medium	二分
0167	Two Sum II - Input array is sorted	LeetCode	力扣	Python		CSDN	Easy	双指针
0169
0188	Best Time to Buy and Sell Stock IV	LeetCode	力扣	Python		CSDN	Hard	动态规划
0200	Number of Islands	LeetCode	力扣	Python		CSDN	Medium	DFS
0206	Reverse Linked List	LeetCode	力扣	Python		CSDN	Easy	链表
0215	Kth Largest Element in an Array	LeetCode	力扣	Python		CSDN	Medium	快排、堆
0222	Count Complete Tree Nodes完全二叉树的节点个数	LeetCode	力扣	Python		CSDN	Medium	二叉树
0225	Implement Stack using Queues	LeetCode	力扣	Python		CSDN	Easy	栈、队列
0226	Invert Binary Tree	LeetCode	力扣	Python	Go	CSDN	Easy	二叉树、递归
0230	Kth Smallest Element in a BST二叉搜索树中第K小的元素	LeetCode	力扣	Python		CSDN	Medium	二叉树
0235	Lowest Common Ancestor of a Binary Search Tree二叉搜索树的最近公共祖先	LeetCode	力扣	Python		CSDN	Easy	二叉树
0236	Lowest Common Ancestor of a Binary Tree 二叉树的最近公共祖先	LeetCode	力扣	Python		CSDN	Medium	二叉树
0240	Search a 2D Matrix II	LeetCode	力扣	Python		CSDN	Medium	数组
0241	Different Ways to Add Parentheses	LeetCode	力扣	Python		CSDN	Medium	分治
0257	Binary Tree Paths	LeetCode	力扣	Python		CSDN	Easy	DFS
0278	First Bad Version	LeetCode	力扣	Python		CSDN	Easy	二分
0279	Perfect Squares	LeetCode	力扣	Python		CSDN	Medium	BFS、动态规划
0300
0309	Best Time to Buy and Sell Stock with Cooldown	LeetCode	力扣	Python		CSDN	Medium	动态规划
0322
0345	Reverse Vowels of a String	LeetCode	力扣	Python		CSDN	Easy	双指针
0347	Top K Frequent Elements	LeetCode	力扣	Python		CSDN	Medium	桶排序
0365	Water and Jug Problem	LeetCode	力扣	Python		CSDN	Medium	BFS、数学
0392	Is Subsequence	LeetCode	力扣	Python		CSDN	Easy	双指针
0406	Queue Reconstruction by Height	LeetCode	力扣	Python		CSDN	Medium	贪心
0409	Longest Palindrome	LeetCode	力扣	Python		CSDN	Easy	字符串
0417	Pacific Atlantic Water Flow	LeetCode	力扣	Python		CSDN	Medium	DFS
0429	N-ary Tree Level Order Traversal N 叉树的层序遍历	LeetCode	力扣	Python		CSDN	Medium	二叉树
0435	Non-overlapping Intervals	LeetCode	力扣	Python		CSDN	Medium	区间贪心
0450	Delete Node in a BST	LeetCode	力扣	Python		CSDN	Medium	二叉树
0451	Sort Characters By Frequency	LeetCode	力扣	Python		CSDN	Medium	桶排序
0452	Minimum Number of Arrows to Burst Balloons	LeetCode	力扣	Python		CSDN	Medium	区间贪心
0455	Assign Cookies	LeetCode	力扣	Python		CSDN	Easy	贪心
0491	Increasing Subsequences	LeetCode	力扣	Python		CSDN	Medium	DFS
0508	Most Frequent Subtree Sum出现次数最多的子树元素和	LeetCode	力扣	Python		CSDN	Medium	二叉树
0509	Fibonacci Number	LeetCode	力扣	Python		CSDN	Easy	动态规划
0513	Find Bottom Left Tree Value找树左下角的值	LeetCode	力扣	Python		CSDN	Medium	二叉树
0515	Find Largest Value in Each Tree Row在每个树行中找最大值	LeetCode	力扣	Python		CSDN	Medium	二叉树
0524	Longest Word in Dictionary through Deleting	LeetCode	力扣	Python		CSDN	Medium	双指针
0530	Minimum Absolute Difference in BST二叉搜索树的最小绝对差	LeetCode	力扣	Python		CSDN	Easy	二叉树
0538	Convert BST to Greater Tree把二叉搜索树转换为累加树	LeetCode	力扣	Python		CSDN	Medium	二叉树
0540	Single Element in a Sorted Array	LeetCode	力扣	Python		CSDN	Medium	二分
0543	Diameter of Binary Tree	LeetCode	力扣	Python		CSDN	Easy	递归
0547	Friend Circles	LeetCode	力扣	Python		CSDN	Medium	DFS
0559	Maximum Depth of N-ary Tree N 叉树的最大深度	LeetCode	力扣	Python		CSDN	Easy	二叉树
0563	Binary Tree Tilt二叉树的坡度	LeetCode	力扣	Python		CSDN	Easy	二叉树
0589	N-ary Tree Preorder Traversal N叉树的前序遍历	LeetCode	力扣	Python		CSDN	Easy	二叉树
0590	N-ary Tree Postorder Traversal N叉树的后序遍历	LeetCode	力扣	Python		CSDN	Easy	二叉树
0605	Can Place Flowers	LeetCode	力扣	Python		CSDN	Easy	贪心
0606	Construct String from Binary Tree 根据二叉树创建字符串	LeetCode	力扣	Python		CSDN	Easy	二叉树
0623	Add One Row to Tree 在二叉树中增加一行	LeetCode	力扣	Python		CSDN	Medium	二叉树
0633	Sum of Square Numbers	LeetCode	力扣	Python		CSDN	Easy	双指针
0647	Palindromic Substrings	LeetCode	力扣	Python		CSDN	Medium	动态规划
0652	Find Duplicate Subtrees 寻找重复的子树	LeetCode	力扣	Python		CSDN	Medium	二叉树
0653	Two Sum IV - Input is a BST 两数之和 IV - 输入 BST	LeetCode	力扣	Python		CSDN	Easy	二叉树
0654	Maximum Binary Tree最大二叉树	LeetCode	力扣	Python		CSDN	Medium	二叉树
0655	Print Binary Tree 输出二叉树	LeetCode	力扣	Python		CSDN	Medium	二叉树
0662	Maximum Width of Binary Tree 二叉树最大宽度	LeetCode	力扣	Python		CSDN	Medium	二叉树
0665	Non-decreasing Array	LeetCode	力扣	Python		CSDN	Easy	贪心
0669	Trim a Binary Search Tree 修剪二叉搜索树	LeetCode	力扣	Python		CSDN	Medium	二叉树
0671	Second Minimum Node In a Binary Tree 二叉树中第二小的节点	LeetCode	力扣	Python		CSDN	Easy	二叉树
0680	Valid Palindrome II	LeetCode	力扣	Python		CSDN	Easy	双指针
0695	Max Area of Island	LeetCode	力扣	Python		CSDN	Medium	DFS
0700	Search in a Binary Search Tree	LeetCode	力扣	Python		CSDN	Easy	二叉树
0701	Insert into a Binary Search Tree	LeetCode	力扣	Python		CSDN	Medium	二叉树
0714	Best Time to Buy and Sell Stock with Transaction Fee	LeetCode	力扣	Python		CSDN	Medium	动态规划
0744	Find Smallest Letter Greater Than Target	LeetCode	力扣	Python		CSDN	Easy	二分
0783	Minimum Distance Between BST Nodes二叉搜索树节点最小距离	LeetCode	力扣	Python		CSDN	Easy	二叉树
0836	Rectangle Overlap	LeetCode	力扣	Python		CSDN	Easy	数学
0876	Middle of the Linked List	LeetCode	力扣	Python		CSDN	Easy	双指针
0892	Surface Area of 3D Shapes	LeetCode	力扣	Python		CSDN	Easy	数学
0914	X of a Kind in a Deck of Cards	LeetCode	力扣	Python		CSDN	Easy	数学
0994	Rotting Oranges	LeetCode	力扣	Python		CSDN	Easy	BFS
1013	Partition Array Into Three Parts With Equal Sum	LeetCode	力扣	Python		CSDN	Easy	双指针
1038	Binary Search Tree to Greater Sum Tree把二叉搜索树转换为累加树	LeetCode	力扣	Python		CSDN	Medium	二叉树
1071	Greatest Common Divisor of Strings	LeetCode	力扣	Python		CSDN	Easy	字符串
1091	Shortest Path in Binary Matrix	LeetCode	力扣	Python		CSDN	Medium	BFS
1103	Distribute Candies to People	LeetCode	力扣	Python		CSDN	Easy	暴力
1160	Find Words That Can Be Formed by Characters	LeetCode	力扣	Python		CSDN	Easy	字符串
1358	Number of Substrings Containing All Three Characters	LeetCode	力扣	Python		CSDN	Medium	双指针、滑窗
1360	Number of Days Between Two Dates	LeetCode	力扣	Python		CSDN	Easy	数学
1362	Closest Divisors	LeetCode	力扣	Python		CSDN	Medium	数学
1365	How Many Numbers Are Smaller Than the Current Number	LeetCode	力扣	Python		CSDN	Easy	暴力
1366	Rank Teams by Votes	LeetCode	力扣	Python		CSDN	Medium	排序
1367	Linked List in Binary Tree	LeetCode	力扣	Python		CSDN	Medium	DFS
1370	Increasing Decreasing String	LeetCode	力扣	Python		CSDN	Easy	排序
1372	Longest ZigZag Path in a Binary Tree	LeetCode	力扣	Python		CSDN	Medium	DFS
1374	Generate a String With Characters That Have Odd Counts	LeetCode	力扣	Python		CSDN	Easy	字符串
1375	Bulb Switcher III	LeetCode	力扣	Python		CSDN	Medium	最大编号
1376	Time Needed to Inform All Employees	LeetCode	力扣	Python		CSDN	Medium	自底向上
1380	Lucky Numbers in a Matrix	LeetCode	力扣	Python		CSDN	Easy	暴力
1381	Design a Stack With Increment Operation	LeetCode	力扣	Python		CSDN	Medium	栈
1382	Balance a Binary Search Tree	LeetCode	力扣	Python		CSDN	Medium	二叉树
1385	Find the Distance Value Between Two Arrays	LeetCode	力扣	Python		CSDN	Easy	暴力
1386	Cinema Seat Allocation	LeetCode	力扣	Python		CSDN	Medium	哈希表
1387	Sort Integers by The Power Value	LeetCode	力扣	Python		CSDN	Medium	排序
1389	Create Target Array in the Given Order	LeetCode	力扣	Python		CSDN	Easy	数组
1390	Four Divisors	LeetCode	力扣	Python		CSDN	Medium	数学
1394	Find Lucky Integer in an Array	LeetCode	力扣	Python		CSDN	Easy	暴力
1395	Count Number of Teams	LeetCode	力扣	Python		CSDN	Medium	暴力
1396	Design Underground System	LeetCode	力扣	Python		CSDN	Medium	设计
1408	String Matching in an Array	LeetCode	力扣	Python		CSDN	Easy	字符串
1409	Queries on a Permutation With Key	LeetCode	力扣	Python		CSDN	Medium	模拟
1410	HTML Entity Parser HTML	LeetCode	力扣	Python		CSDN	Medium	字符串
面试题03	数组中重复的数字		力扣	Python		CSDN	Easy	哈希
面试题04	二维数组中的查找		力扣	Python		CSDN	Easy	数组
面试题05	替换空格		力扣	Python		CSDN	Easy	字符串
面试题06	从尾到头打印链表		力扣	Python		CSDN	Easy	链表
面试题07	重建二叉树		力扣	Python		CSDN	Medium	二叉树、递归
面试题09	用两个栈实现队列		力扣	Python		CSDN	Easy	栈、队列
面试题10- I	斐波那契数列		力扣	Python		CSDN	Easy	动态规划
面试题10- II	青蛙跳台阶问题		力扣	Python		CSDN	Easy	动态规划
面试题11	旋转数组的最小数字		力扣	Python		CSDN	Easy	二叉树
面试题17	打印从1到最大的n位数		力扣	Python		CSDN	Easy	暴力
面试题26	树的子结构		力扣	Python		CSDN	Medium	DFS
面试题27	二叉树的镜像		力扣	Python		CSDN	Easy	二叉树、递归
面试题32 - I	从上到下打印二叉树		力扣	Python		CSDN	Medium	二叉树、BFS
面试题32 - II	从上到下打印二叉树 II		力扣	Python		CSDN	Easy	二叉树、BFS
面试题32 - III	从上到下打印二叉树 III		力扣	Python		CSDN	Medium	二叉树、BFS
面试题33	二叉搜索树的后序遍历序列		力扣	Python		CSDN	Medium	递归
面试题34	二叉树中和为某一值的路径		力扣	Python		CSDN	Medium	回溯
面试题37	序列化二叉树		力扣	Python		CSDN	Hard	二叉树
面试题53 - I	在排序数组中查找数字 I		力扣	Python		CSDN	Easy	二叉树
面试题53 - II	0～n-1中缺失的数字		力扣	Python		CSDN	Easy	二叉树
面试题 57 - II	和为s的连续正数序列		力扣	Python		CSDN	Easy	滑窗、数学
面试题59 - II	队列的最大值		力扣	Python		CSDN	Medium	队列
面试题62	圆圈中最后剩下的数字		力扣	Python		CSDN	Easy	数学
面试题68 - I	二叉搜索树的最近公共祖先		力扣	Python		CSDN	Easy	二叉树
面试题68 - II	二叉树的最近公共祖先		力扣	Python		CSDN	Easy	二叉树
面试题0106	字符串压缩		力扣	Python		CSDN	Easy	双指针
面试题0107	旋转矩阵		力扣	Python		CSDN	Medium	数学
面试题0402	最小高度树		力扣	Python		CSDN	Easy	二叉树
面试题 0403	特定深度节点链表		力扣	Python		CSDN	Medium	二叉树
面试题 0404	检查平衡性		力扣	Python		CSDN	Easy	二叉树
面试题 0405	合法二叉搜索树		力扣	Python		CSDN	Medium	二叉树
面试题 0406	后继者		力扣	Python		CSDN	Medium	二叉树
面试题 0408	首个共同祖先		力扣	Python		CSDN	Medium	二叉树
面试0410	检查子树		力扣	Python		CSDN	Medium	DFS
面试0412	求和路径		力扣	Python		CSDN	Medium	二叉树
面试1001	Sorted Merge LCCI		力扣	Python		CSDN	Easy	双指针
面试1712	BiNode		力扣	Python		CSDN	Easy	二叉树

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License

MIT