刷题练手系列 LeetCode Solutions

Easy

No	Title	Solution
1	1. Two Sum	Java
2	20. Valid Parentheses	Java
3	21. Merge Two Sorted Lists	Java
4	104. Maximum Depth of Binary Tree	Java
5	136. Single Number	Java
6	141. Linked List Cycle	Java
7	169. Majority Element	Java
8	206. Reverse Linked List	Java
9	225. Implement Stack using Queues	Java
10	226. Invert Binary Tree	Java
11	232. Implement Queue using Stacks	Java
12	344. Reverse String	Java
13	509. Fibonacci Number	Java
14	561. Array Partition I	Java
15	572. Subtree of Another Tree	Java
16	703. Kth Largest Element in a Stream	Java
17	709. To Lower Case	Java
18	771. Jewels and Stones	Java
19	804. Unique Morse Code Words	Java
20	824. Goat Latin	Java
21	832. Flipping an Image	Java
22	852. Peak Index in a Mountain Array	Java
23	876. Middle of the Linked List	Java
24	905. Sort Array By Parity	Java
25	922. Sort Array By Parity II	Java
26	925. Long Pressed Name	Java
27	938. Range Sum of BST	Java
28	961. N-Repeated Element in Size 2N Array	Java
29	977. Squares of a Sorted Array	Java
30	1021. Remove Outermost Parentheses	Java
31	1051. Height Checker	Java
32	412. Fizz Buzz	Java
33	237. Delete Node in a Linked List	Java
34	283. Move Zeroes	Java
35	242. Valid Anagram	Java
36	13. Roman to Integer	Java
37	217. Contains Duplicate	Java
38	1480. 一维数组的动态和	Java
39	1046. 最后一块石头的重量	Java
40	53. 最大子序和	Java
41	94. 二叉树的中序遍历	Java
42	26. remove-duplicates-from-sorted-array	Java
43	27. remove-element	Java

Medium

No	Title	Solution
1	2. Add Two Numbers	Java
2	3. Longest Substring Without Repeating Characters	Java
3	19. Remove Nth Node From End of List	Java
4	46. Permutations	Java
5	56. Merge Intervals	Java
6	92. Reverse Linked List II	Java
7	230. Kth Smallest Element in a BST	Java
8	445. Add Two Numbers II	Java
9	454. 4Sum II	Java
10	807. Max Increase to Keep City Skyline	Java
11	442. find-all-duplicates-in-an-array	Java
12	739. daily-temperatures	Java
13	116. 填充每个节点的下一个右侧节点指针	Java

Hard

No	Title	Solution
1	239. Sliding Window Maximum	Java
2	面试题 08.12. 八皇后	Java
3	42. 接雨水	Java