leetcode

-English
record my answers to leetcode's questions

-中文
记录自己在leetcode上问题的思路及解答

"*" means the question is not solved

My leetcode profile website is https://leetcode.com/xinrui-_-/.

#	Title	Solution	Difficulty
1	Two Sum	java	Easy
7	Reverse Integer	java	Easy
2	Add Two Numbers	java	Medium
3	Longest Substring Without Repeating Characters	java	Medium
4	Median of Two Sorted Arrays	java	Hard
6	ZigZag Conversion	java	Medium
5	Longest Palindromic Substring	java	Medium
9	Palindrome Number	java	Easy
8	String to Integer(atoi)	java	Medium
10	Regular Expression Matching	java	Hard
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
18	4sum	java	Medium
19	Remove Nth Node From End of List	java	Medium
20	Valid Parentheses	java	Easy
21	Merge Two Sorted Lists	java	Easy
22	Generate Parentheses	java	Medium
23	Merge k Sorted Lists	java	Hard
24	Swap Nodes in Pairs	java	Medium
25	Reverse Nodes in k-Group	java	Hard
26	Remove Duplicates from Sorted Array	java	Easy
27	Remove Element	java	Easy
29	Divide Two Integers	java	Medium
28	Implement strStr()	java	Easy
30	Substring with Concatenation of All Words	java	Hard
31	Next Permutation	java	Medium
32	Longest Valid Parentheses	java	Hard
33	Search in Rotated Sorted Array	java	Medium
34	Search for a Range	java	Medium
35	Search Insert Position	java	Easy
36	Valid Sudoku	java	Medium
37	Sudoku Solver	java	Hard
38	Count and Say	java	Easy
39	Combination Sum	java	Medium
40	Combination Sum II	java	Medium
41	First Missing Positive	java	Hard
42	Trapping Rain Water	java	Hard
43	Multiply Strings	java	Medium
44	Wildcard Matching	java	Hard
45	Jump Game II	java	Hard
46	Permutations	java	Medium
47	Permutations II	java	Medium
48	Rotate Image	java	Medium
49	Group Anagrams	java	Medium
50	Pow(x, n)	java	Medium
51	N-Queens	java	Hard
52	N-Queens II*	java	Hard
52	Maximum Subarray	java	Easy