LeetCode Solutions in Java, Python and C++

#	Title	Solution	Difficulty
1	Two Sum	Java, Python, C++	Easy
2	Add Two Numbers	Java, Python, C++	Medium
3	Longest Substring Without Repeating Characters	Java, Python, C++	Medium
4	Median of Two Sorted Arrays	Java, Python, C++	Hard
5	Longest Palindromic Substring	Java, Python, C++	Medium
6	ZigZag Conversion	Java, Python, C++	Medium
7	Reverse Integer	Java, Python, C++	Easy
8	String to Integer (atoi)	Java, Python, C++	Medium
9	Palindrome Number	Java, Python, C++	Easy
10	Regular Expression Matching	Java, Python, C++	Hard
11	Container With Most Water	Java, Python, C++	Medium
12	Integer to Roman	Java, Python, C++	Medium
13	Roman to Integer	Java, Python, C++	Easy
14	Longest Common Prefix	Java, Python, C++	Easy
15	3Sum	Java, Python, C++	Medium
16	3Sum Closest	Java, Python, C++	Medium
17	Letter Combinations of a Phone Number	Java, Python, C++	Medium
18	4Sum	Java, Python, C++	Medium
19	Remove Nth Node From End of List	Java, Python, C++	Medium
20	Valid Parentheses	Java, Python, C++	Easy
21	Merge Two Sorted Lists	Java, Python, C++	Easy
22	Generate Parentheses	Java, Python, C++	Medium
23	Merge k Sorted Lists	Java, Python, C++	Hard
24	Swap Nodes in Pairs	Java, Python, C++	Medium
25	Reverse Nodes in k-Group	Java, Python, C++	Hard
26	Remove Duplicates from Sorted Array	Java, Python, C++	Easy
27	Remove Element	Java, Python, C++	Easy
28	Implement strStr()	Java, Python, C++	Easy
29	Divide Two Integers	Java, Python, C++	Medium
30	Substring with Concatenation of All Words	Java, Python, C++	Hard
31	Next Permutation	Java, Python, C++	Medium
32	Longest Valid Parentheses	Java, Python, C++	Hard
33	Search in Rotated Sorted Array	Java, Python, C++	Medium
34	Find First and Last Position of Element in Sorted Array	Java, Python, C++	Medium
35	Search Insert Position	Java, Python, C++	Easy
36	Valid Sudoku	Java, Python, C++	Medium
37	Sudoku Solver	Java, Python, C++	Hard
38	Count and Say	Java, Python, C++	Easy
39	Combination Sum	Java, Python, C++	Medium
40	Combination Sum II	Java, Python, C++	Medium
41	First Missing Positive	Java, Python, C++	Hard
42	Trapping Rain Water	Java, Python, C++	Hard
43	Multiply Strings	Java, Python, C++	Medium
44	Wildcard Matching	Java, Python, C++	Hard
45	Jump Game II	Java, Python, C++	Hard
46	Permutations	Java, Python, C++	Medium
47	Permutations II	Java, Python, C++	Medium
48	Rotate Image	Java, Python, C++	Medium
49	Group Anagrams	Java, Python, C++	Medium
50	Pow(x, n)	Java, Python, C++	Medium
51	N-Queens	Java, Python, C++	Hard
52	N-Queens II	Java, Python, C++	Hard
53	Maximum Subarray	Java, Python, C++	Easy
54	Spiral Matrix	Java, Python, C++	Medium
55	Jump Game	Java, Python, C++	Medium
56	Merge Intervals	Java, Python, C++	Medium
57	Insert Interval	Java, Python, C++	Hard
58	Length of Last Word	Java, Python, C++	Easy
59	Spiral Matrix II	Java, Python, C++	Medium
60	Permutation Sequence	Java, Python, C++	Medium
61	Rotate List	Java, Python, C++	Medium
62	Unique Paths	Java, Python, C++	Medium
63	Unique Paths II	Java, Python, C++	Medium
64	Minimum Path Sum	Java, Python, C++	Medium
65	Valid Number	Java, Python, C++	Hard
66	Plus One	Java, Python, C++	Easy
67	Add Binary	Java, Python, C++	Easy
68	Text Justification	Java, Python, C++	Hard
69	Sqrt(x)	Java, Python, C++	Easy
70	Climbing Stairs	Java, Python, C++	Easy
71	Simplify Path	Java, Python, C++	Medium
72	Edit Distance	Java, Python, C++	Hard
73	Set Matrix Zeroes	Java, Python, C++	Medium
74	Search a 2D Matrix	Java, Python, C++	Medium
75	Sort Colors	Java, Python, C++	Medium
76	Minimum Window Substring	Java, Python, C++	Hard
77	Combinations	Java, Python, C++	Medium
78	Subsets	Java, Python, C++	Medium
79	Word Search	Java, Python, C++	Medium
80	Remove Duplicates from Sorted Array II	Java, Python, C++	Medium
81	Search in Rotated Sorted Array II	Java, Python, C++	Medium
82	Remove Duplicates from Sorted List II	Java, Python, C++	Medium
83	Remove Duplicates from Sorted List	Java, Python, C++	Easy
84	Largest Rectangle in Histogram	Java, Python, C++	Hard
85	Maximal Rectangle	Java, Python, C++	Hard
86	Partition List	Java, Python, C++	Medium
87	Scramble String	Java, Python, C++	Hard
88	Merge Sorted Array	Java, Python, C++	Easy
89	Gray Code	Java, Python, C++	Medium
90	Subsets II	Java, Python, C++	Medium
91	Decode Ways	Java, Python, C++	Medium
92	Reverse Linked List II	Java, Python, C++	Medium
93	Restore IP Addresses	Java, Python, C++	Medium
94	Binary Tree Inorder Traversal	Java, Python, C++	Medium
95	Unique Binary Search Trees II	Java, Python, C++	Medium
96	Unique Binary Search Trees	Java, Python, C++	Medium
97	Interleaving String	Java, Python, C++	Hard
98	Validate Binary Search Tree	Java, Python, C++	Medium
99	Recover Binary Search Tree	Java, Python, C++	Hard
100	Same Tree	Java, Python, C++	Easy
101	Symmetric Tree	Java, Python, C++	Easy
102	Binary Tree Level Order Traversal	Java, Python, C++	Medium
103	Binary Tree Zigzag Level Order Traversal	Java, Python, C++	Medium
104	Maximum Depth of Binary Tree	Java, Python, C++	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	Java, Python, C++	Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	Java, Python, C++	Medium
107	Binary Tree Level Order Traversal II	Java, Python, C++	Easy
108	Convert Sorted Array to Binary Search Tree	Java, Python, C++	Easy
109	Convert Sorted List to Binary Search Tree	Java, Python, C++	Medium
110	Balanced Binary Tree	Java, Python, C++	Easy
111	Minimum Depth of Binary Tree	Java, Python, C++	Easy
112	Path Sum	Java, Python, C++	Easy
113	Path Sum II	Java, Python, C++	Medium
114	Flatten Binary Tree to Linked List	Java, Python, C++	Medium
115	Distinct Subsequences	Java, Python, C++	Hard
116	Populating Next Right Pointers in Each Node	Java, Python, C++	Medium
117	Populating Next Right Pointers in Each Node II	Java, Python, C++	Medium
118	Pascal's Triangle	Java, Python, C++	Easy
119	Pascal's Triangle II	Java, Python, C++	Easy
120	Triangle	Java, Python, C++	Medium
121	Best Time to Buy and Sell Stock	Java, Python, C++	Easy
122	Best Time to Buy and Sell Stock II	Java, Python, C++	Easy
123	Best Time to Buy and Sell Stock III	Java, Python, C++	Hard
124	Binary Tree Maximum Path Sum	Java, Python, C++	Hard
125	Valid Palindrome	Java, Python, C++	Easy
126	Word Ladder II	Java, Python, C++	Hard