LeetCode

Solutions to LeetCode by Java, JS, and Python

Notes

• 数据结构与算法
• 时间复杂度和空间复杂度
• 数组
• 栈和队列
• 链表
• 字符串
• 哈希表
• 树
• 图
• 双指针法
• 二分查找
• Brute Force 算法
• 滑动窗口
• 一个方法解决 nSum 问题

LeetCodes

数学

No.	Title	Solution	Tags	Difficulty
0202	Happy Number	Java/JS/Python	数学、哈希表、双指针	Easy
0069	Sqrt(x)	Java/JS/Python	数学、Brute Force 算法、二分查找	Easy
0367	Valid Perfect Square	Java/JS/Python	数学、Brute Force 算法、二分查找	Easy

数组

No.	Title	Solution	Tags	Difficulty
0001	Two Sum	Java/JS/Python	Array、哈希表	Easy
0026	Remove Duplicates from Sorted Array	Java/JS/Python	Array、双指针	Easy
0027	Remove Element	Java/JS/Python	Array、双指针	Easy
0035	Search Insert Position	Java/JS/Python	Array、二分查找	Easy
0121	Best Time to Buy and Sell Stock	Java/JS/Python	Array、DP	Easy
0169	Majority Element	Java/JS/Python	Array、哈希表、Moore's Voting Algorithm	Easy
0217	Contains Duplicate	Java/JS/Python	Array、哈希表、排序	Easy
0252	Meeting Rooms	Java/JS/Python	Array、排序	Easy
0283	Move Zeroes	Java/JS/Python	Array、双指针	Easy
0349	Intersection of Two Arrays	Java/JS/Python	Array、哈希表、双指针	Easy
0704	Binary Search	Java/JS/Python	Array、二分查找	Easy
0977	Squares of a Sorted Array	Java/JS/Python	Array、双指针	Easy
/	Merge Two Order Array	Java/JS/Python	Array、双指针	/
0034	Find First and Last Position of Element in Sorted Array	Java/JS/Python	Array、二分查找	Medium
0057	Insert Interval	Java/JS/Python	Array、扫描	Medium
0015	3Sum	Java/JS/Python	Array、哈希表、双指针、排序	Medium
0018	4Sum	Java/JS/Python	Array、双指针	Medium
0039	Combination Sum	Java/JS/Python	Array、回溯	Medium
0238	Product of Array Except Self	Java/JS/Python	Array、前缀和	Medium
0875	Koko Eating Bananas	Java/JS/Python	Array、二分搜索	Medium
1011	Capacity To Ship Packages Within D Days	Java/JS/Python	Array、二分搜索	Medium
0410	Split Array Largest Sum	Java/JS/Python	Array、贪心、二分查找、DP、前缀和	Hard

二维数组

No.	Title	Solution	Tags	Difficulty
0048	Rotate Image	Java/JS/Python	Array、数学、矩阵	Medium
0054	Rotate Image	Java/JS/Python	Array、数学、矩阵	Medium
0059	Rotate Image	Java/JS/Python	Array、数学、矩阵	Medium

字符串

No.	Title	Solution	Tags	Difficulty
/	Replace Number	Java/JS/Python	字符串、双指针	/
0242	Valid Anagram	Java/JS/Python	字符串、哈希表	Easy
0344	Reverse String	Java/JS/Python	字符串、栈、递归、双指针	Easy
0383	Ransom Note	Java/JS/Python	字符串、哈希表	Easy
0541	Reverse String II	Java/JS/Python	字符串、双指针、递归	Easy
0005	Longest Palindromic Substring	Java/JS/Python	字符串、双指针、滑动窗口、DP、Manacher's algorithm	Medium
0049	Group Anagrams	Java/JS/Python	字符串、双指针、滑动窗口、DP、Manacher's algorithm	Medium
0151	Reverse Words in a String	Java/JS/Python	字符串、双指针	Medium
0438	Find All Anagrams in a String	Java/JS/Python	字符串、哈希表、滑动窗口	Medium
0567	567.Permutation in String	Java/JS/Python	字符串、哈希表、滑动窗口	Medium
0076	Minimum Window Substring	Java/JS/Python	字符串、哈希表、滑动窗口	Hard

链表

No.	Title	Solution	Tags	Difficulty
0021	Merge Two Sorted Lists	Java/JS/Python	链表、双指针	Easy
0206	Reverse Linked List	Java/JS/Python	链表、多指针、递归	Easy
0083	Remove Duplicates from Sorted List	Java/JS/Python	链表、双指针	Easy
0141	Linked List Cycle	Java/JS/Python	链表、双指针	Easy
0160	Intersection of Two Linked Lists	Java/JS/Python	链表、双指针	Easy
0876	Middle of the Linked List	Java/JS/Python	链表、双指针	Easy
0019	Remove Nth Node From End of List	Java/JS/Python	链表、双指针、递归	Medium
0024	Swap Nodes in Pairs	Java/JS/Python	链表、双指针、递归	Medium
0061	Rotate List	Java/JS/Python	链表、双指针	Medium
0082	Remove Duplicates from Sorted List II	Java/JS/Python	链表、双指针	Medium
0086	Partition List	Java/JS/Python	链表、双指针	Medium
0092	Reverse Linked List II	Java/JS/Python	链表、双指针、递归	Medium
0142	Linked List Cycle II	Java/JS/Python	链表、双指针	Medium
0707	Design Linked List	Java/JS/Python	链表、设计	Medium
0023	Merge k Sorted Lists	Java/JS/Python	链表、分治、堆（优先队列）、归并排序	Hard