leetcode-solutions

#	Title	Solution	Difficulty	Tags
1	Two Sum	Python	Easy	Array, Hash Map
2	Add Two Numbers	Python	Medium	Linked List
3	Longest Unique Substring	Python	Medium	String, Sliding Window, HashSet
4	Median Of two Sorted Array	Python	Hard	Binary Search, Divide and Conquer, Array
5	Longest Palindromic Substring	Python	Medium	Dynamic Programming, String
6	Zigzag Conversion	Python	Medium	String, Simulation
7	Reverse Integer	Python	Medium	Math, Integer Manipulation
8	String to Integer	Python	Medium	String, Parsing
9	Palindrome Number	Python	Easy	Math
10	Regular Expression Matching	Python	Hard	Dynamic Programming, Recursion
11	Container with Most Water	Python	Medium	Two Pointers, Greedy
12	Integer to Roman	Python	Medium	Math, String
13	Roman to Integer	Python	Easy	Hash Table, Math
14	Longest Common Prefix	Python	Easy	String, Trie
15	3 Sum	Python	Medium	Array, Two Pointers
16	3 Sum Closet	Python	Medium	Array, Two Pointers
17	Letter Combination of Phone Number	Python	Medium	Hash Table, Backtrack
18	4 Sum	Python	Medium	Array, Two Pointer
19	Remove Nth Node from List	Python	Medium	Linked List, Two Pointer
20	Valid Parentheses	Python	Easy	String, Stack
21	Merge Two Sorted Lists	Python	Easy	Linked List, Recursion
22	Generate Parentheses	Python	Medium	String, Dynamic Programming
23	Merge K Sorted Lists	Python	Hard	Linked List, Divide and Conquer
24	Swap Nodes in Pairs	Python	Medium	Linked List, Recursion
25	Reverse Nodes in K Group	Python	Hard	Linked List, Recursion
26	Remove Duplicates from Sorted Array	Python	Easy	Array, Two Pointer
27	Remove Element	Python	Easy	Array, Two Pointer
28	Find Index of First Occurrence in String	Python	Easy	Two Pointer , String
29	Divide Two Integers	Python	Medium	Math , Bit Manipulation
30	Substring With concatenation of All Words	Python	Hard	Hash Table, String
31	Next Permutation	Python	Medium	Array, Two Pointer
32	Longest Valid Parentheses	Python	Hard	String, Dynamic Programming
33	Search in Rotated Sorted Array	Python	Medium	Array, Binary Search
34	Find First and Last Position of Element in Sorted Array	Python	Medium	Array, Binary Search
35	Search Insert Position	Python	Easy	Array, Binary Search
36	Valid Sudoku	Python	Medium	Array, Hash Table
37	Sudoku Solver	Python	Hard	Array, Hash Table
38	Count and Say	Python	Medium	String
39	Combination Sum	Python	Medium	Array, Backtracking
40	Combination Sum 2	Python	Medium	Array, Backtracking
41	First Missing Positive	Python	Hard	Array, Hash Table
42	Trapping Rain Water	Python	Hard	Array, Two Pointer
43	Multiply String	Python	Medium	Math, String
44	Wildcard Matching	Python	Hard	String, Dynamic Programming
45	Jump Game 2	Python	Medium	Array, Dynamic Programming
46	Permutations	Python	Medium	Array, Backtracking
47	Permutations 2	Python	Medium	Array, Backtracking
48	Rotate Image	Python	Medium	Array, Math
49	Group Anagrams	Python	Medium	Array, String
50	Pow(x,n)	Python	Medium	Recurrsion, Math
51	N Queens	Python	Hard	Array, Backtracking
52	N Queens 2	Python	Hard	Array, Backtracking
53	Maximum Subarray	Python	Medium	Array, Divide and Conquer
54	Spiral Matrix	Python	Medium	Array, Matrix
55	Jump Game	Python	Medium	Array, Dynamic Programming
56	Merge Intervals	Python	Medium	Array, Sorting
57	Insert Interval	Python	Medium	Array, Sorting
58	Length of Last Word	Python	Easy	String
59	Spiral Matrix 2	Python	Medium	Array, Matrix
60	Permutation Sequence	Python	Hard	Math, Recursion
61	Rotate List	Python	Medium	Linked List, Two Pointer
62	Unique Paths	Python	Medium	Math, Dynamic Programming
63	Unique Paths 2	Python	Medium	Math, Dynamic Programming
64	Minimum Path Sum	Python	Medium	Array, Dynamic Programming
65	Valid Number	Python	Hard	String
66	Plus One	Python	Easy	Array, Math
67	Add Binary	Python	Easy	String, Math
68	Text Justification	Python	Hard	String, Array
69	Sqrt(x)	Python	Easy	Math, Binary Search
70	Climbing Stairs	Python	Easy	Math, Dynamic Programming
71	Simplify Path	Python	Medium	String, Stack
72	Edit Distance	Python	Medium	String, Dynamic Programming
73	Set Zeroes	Python	Medium	Array, Matrix
74	Search 2D Matrix	Python	Medium	Array, Matrix
75	Sort Colors	Python	Medium	Array, Sorting
76	Minimum Window Substring	Python	Hard	String, Sliding Window
77	Combinations	Python	Medium	Backtracking
78	Subsets	Python	Medium	Array, Backtracking
79	Word Search	Python	Medium	Array, String
80	Remove Duplicates from Sorted Array 2	Python	Medium	Array, Two Pointer
81	Search in Rotate Sorted Array 2	Python	Medium	Array, Binary Search
82	Remove Duplicates from Sorted List 2	Python	Medium	Linked List, Two Pointer
83	Remove Duplicates from Sorted List	Python	Easy	Linked List
84	Largest Rectangle in Histogram	Python	Hard	Array, Stack
85	Maximal Rectangle	Python	Hard	Dynamic Programming, Stack
86	Partition List	Python	Medium	Linked List, Two Pointer
87	Scramble String	Python	Hard	String, Dynamic Programming
88	Merge Sorted Array	Python	Easy	Array, Sorting
89	Gray Code	Python	Medium	Math, Backtracking
90	Subsets 2	Python	Medium	Array, Backtracking
91	Decode Ways	Python	Medium	String, Dynamic Programming
92	Reverse Linked List 2	Python	Medium	Linked List, Dynamic Programming
93	Restore IP Addresses	Python	Medium	String, Backtracking
94	Binary Tree Inorder Traversal	Python	Easy	Stack, Tree
95	Unique Binary Search Trees II	Python	Easy	Dynamic Programming, Backtracking
96	Unique Binary Search Trees	Python	Medium	Dynamic Programming, Math
97	Interleaving String	Python	Medium	Dynamic Programming, String
98	Validate Binary Search Tree	Python	Medium	Tree, DFS
99	Recover Binary Search Tree	Python	Medium	Tree, DFS
100	Same Tree	Python	Easy	Tree, DFS
101	Symmetric Tree	Python	Easy	Tree, DFS
102	Binary Tree Level Order Traversal	Python	Medium	Tree, BFS