ID	Title	Difficulty	Note	Java	Python
1	Two Sum	Easy	noNote	Java	Python
2	Add Two Numbers	Medium	noNote	Java	Python
3	Longest Substring Without Repeating Characters	Medium	noNote	Java	Python
4	Median of Two Sorted Arrays	Hard	noNote	no	no
5	Longest Palindromic Substring	Medium	noNote	no	no
6	ZigZag Conversion	Medium	noNote	Java	Python
7	Reverse Integer	Easy	noNote	Java	Python
8	String to Integer (atoi)	Medium	noNote	Java	no
9	Palindrome Number	Easy	noNote	Java	Python
10	Regular Expression Matching	Hard	noNote	Java	no
11	Container With Most Water	Medium	noNote	Java	no
12	Integer to Roman	Medium	noNote	Java	Python
13	Roman to Integer	Easy	noNote	Java	Python
14	Longest Common Prefix	Easy	noNote	Java	Python
15	3Sum	Medium	noNote	Java	Python
16	3Sum Closest	Medium	noNote	Java	no
17	Letter Combinations of a Phone Number	Medium	noNote	Java	Python
18	4Sum	Medium	noNote	Java	no
19	Remove Nth Node From End of List	Medium	noNote	Java	Python
20	Valid Parentheses	Easy	noNote	Java	no
21	Merge Two Sorted Lists	Easy	noNote	Java	Python
22	Generate Parentheses	Medium	noNote	Java	Python
23	Merge k Sorted Lists	Hard	noNote	Java	Python
24	Swap Nodes in Pairs	Medium	noNote	Java	Python
25	Reverse Nodes in k-Group	Hard	noNote	Java	no
26	Remove Duplicates from Sorted Array	Easy	noNote	Java	Python
27	Remove Element	Easy	noNote	Java	Python
28	Implement strStr()	Easy	noNote	Java	no
29	Divide Two Integers	Medium	noNote	Java	no
30	Substring with Concatenation of All Words	Hard	noNote	no	no
31	Next Permutation	Medium	noNote	Java	Python
32	Longest Valid Parentheses	Hard	noNote	Java	no
33	Search in Rotated Sorted Array	Medium	noNote	Java	no
34	Search for a Range	Medium	noNote	Java	Python
35	Search Insert Position	Easy	noNote	Java	Python
36	Valid Sudoku	Medium	noNote	Java	no
37	Sudoku Solver	Hard	noNote	Java	no
38	Count and Say	Easy	noNote	Java	no
39	Combination Sum	Medium	noNote	Java	Python
40	Combination Sum II	Medium	noNote	Java	no
41	First Missing Positive	Hard	noNote	Java	Python
42	Trapping Rain Water	Hard	noNote	Java	no
43	Multiply Strings	Medium	noNote	Java	Python
44	Wildcard Matching	Hard	noNote	no	no
45	Jump Game II	Hard	noNote	Java	no
46	Permutations	Medium	noNote	Java	Python
47	Permutations II	Medium	noNote	Java	Python
48	Rotate Image	Medium	noNote	Java	Python
49	Group Anagrams	Medium	noNote	Java	Python
50	Pow(x, n)	Medium	noNote	Java	Python
51	N-Queens	Hard	noNote	Java	Python
52	N-Queens II	Hard	noNote	Java	Python
53	Maximum Subarray	Easy	noNote	Java	Python
54	Spiral Matrix	Medium	noNote	Java	Python
55	Jump Game	Medium	noNote	Java	Python
56	Merge Intervals	Medium	noNote	Java	no
57	Insert Interval	Hard	noNote	Java	Python
58	Length of Last Word	Easy	noNote	Java	Python
59	Spiral Matrix II	Medium	noNote	Java	Python
60	Permutation Sequence	Medium	noNote	Java	Python
61	Rotate List	Medium	noNote	Java	Python
62	Unique Paths	Medium	noNote	Java	Python
63	Unique Paths II	Medium	noNote	Java	Python
64	Minimum Path Sum	Medium	noNote	Java	Python
65	Valid Number	Hard	noNote	no	no
66	Plus One	Easy	noNote	Java	no
67	Add Binary	Easy	noNote	Java	Python
68	Text Justification	Hard	noNote	Java	Python
69	Sqrt(x)	Easy	noNote	Java	Python
70	Climbing Stairs	Easy	noNote	Java	Python
71	Simplify Path	Medium	noNote	no	no
72	Edit Distance	Hard	noNote	Java	Python
73	Set Matrix Zeroes	Medium	noNote	Java	Python
74	Search a 2D Matrix	Medium	noNote	Java	Python
75	Sort Colors	Medium	noNote	Java	Python
76	Minimum Window Substring	Hard	noNote	no	no
77	Combinations	Medium	noNote	Java	Python
78	Subsets	Medium	noNote	Java	Python
79	Word Search	Medium	noNote	Java	no
80	Remove Duplicates from Sorted Array II	Medium	noNote	Java	Python
81	Search in Rotated Sorted Array II	Medium	noNote	Java	no
82	Remove Duplicates from Sorted List II	Medium	noNote	Java	Python
83	Remove Duplicates from Sorted List	Easy	noNote	Java	Python
84	Largest Rectangle in Histogram	Hard	noNote	no	no
85	Maximal Rectangle	Hard	noNote	no	no
86	Partition List	Medium	noNote	Java	Python
87	Scramble String	Hard	noNote	Java	Python
88	Merge Sorted Array	Easy	noNote	Java	Python
89	Gray Code	Medium	noNote	Java	Python
90	Subsets II	Medium	noNote	Java	Python
91	Decode Ways	Medium	noNote	Java	Python
92	Reverse Linked List II	Medium	noNote	Java	no
93	Restore IP Addresses	Medium	noNote	Java	Python
94	Binary Tree Inorder Traversal	Medium	noNote	Java	Python
95	Unique Binary Search Trees II	Medium	noNote	Java	no
96	Unique Binary Search Trees	Medium	noNote	Java	Python
97	Interleaving String	Hard	noNote	Java	Python
98	Validate Binary Search Tree	Medium	noNote	Java	Python
99	Recover Binary Search Tree	Hard	noNote	no	Python
100	Same Tree	Easy	noNote	Java	Python