README.md

LeetCode Solutions

Introduction

LeetCode is a very good website to sharpen you programming/problem-solving skills. The idea to setup this repo is inspired by Haoel's repo. Java solutions are offered here for references and comparison. And also it is more like a personal practice for myself. Of course, not all solutions are optimal and your suggestions and contributions are welcomed.

Contents

#	Title	Solution	Difficulty
1	Two Sum	Java	Medium
2	Add Two Numbers	Java	Medium
3	Longest Substring Without Repeating Characters	Java	Medium
7	Reverse Integer	Java	Easy
8	String to Integer (atoi)	Java	Easy
9	Palindrome Number	Java	Easy
11	Container With Most Water	Java	Medium
12	Integer to Roman	Java	Medium
13	Roman to Integer	Java	Easy
14	Longest Common Prefix	Java	Easy
15	3Sum	Java	Medium
16	3Sum Closest	Java	Medium
17	Letter Combinations of a Phone Number	Java	Medium
19	Remove Nth Node From End of List	Java	Easy
20	Valid Parentheses	Java	Easy
21	Merge Two Sorted Lists	Java	Easy
22	Generate Parentheses	Java	Medium
24	Swap Nodes in Pairs	Java	Medium
26	Remove Duplicates from Sorted Array	Java	Easy
27	Remove Element	Java	Easy
28	Implement strStr()	Java	Easy
33	Search in Rotated Sorted Array	Java	Hard
50	Pow(x,n)	Java	Medium
61	Rotate List	Java	Medium
66	Plus One	Java	Easy
67	Add Binary	Java	Easy
69	Sqrt(x)	C++	Medium
70	Climbing Stairs	Java	Easy
72	Edit Distance	Java	Hard
73	Set Matrix Zeroes	Java	Medium
74	Search a 2D Matrix	Java	Medium
80	Remove Duplicates from Sorted Array II	Java	Medium
82	Remove Duplicates from Sorted List II	C++	Medium
83	Remove Duplicates from Sorted List	Java	Easy
88	Merge Sorted Array	Java	Easy
136	Single Number	Java	Easy
141	Linked List Cycle	Java	Medium
142	Linked List Cycle II	Java	Medium
175	Combine Two Tables	MySQL	Easy
176	Second Highest Salary	Java	Easy
189	Rotate Array	Java	Medium
190	Reverse Bits	Java	Easy
191	Number of 1 Bits	Java	Easy
202	Happy Number	Java	Easy
203	Remove Linked List Elements	Java	Easy
206	Reverse Linked List	Java	Easy
233	Number of Digit One	C++	Medium
237	Delete Node in a Linked List	C++	Easy
258	Add Digits	C++	Easy
263	Ugly Number	Java	Easy
274	H-Index	Java	Medium
275	H-index II	Java	Medium
283	Move Zeroes	C++	Easy
284	Peeking Iterator	Java	Medium
287	Find the Duplicate Number	Java	Hard
292	Nim Game	C++	Easy