LeetCode Solutions in Python

My solutions to LeetCode problems.

Count	#	Problem	Solution
1	20	Valid Parentheses	Python
2	21	Merge Two Sorted Lists	Python
3	27	Remove Element	Python
4	70	Climbing Stairs	Python
5	74	Search a 2D Matrix	Python
6	155	Min Stack	Python
7	206	Reverse Linked List	Python
8	206	Reverse Linked List (Recursive)	Python
9	225	Implement Stack using Queues	Python
10	374	Guess Number Higher or Lower	Python
11	485	Max Consecutive Ones	Python
12	682	Baseball Game	Python
13	704	Binary Search	Python
14	707	Design Linked List	Python
15	875	Koko Eating Bananas	Python
16	1299	Replace Elements with Greatest Element on Right Side	Python
17	1472	Design Browser History	Python
18	1700	Number of Students Unable to Eat Lunch	Python
19	1929	Concatenation of Array	Python
20	2235	Add Two Integers	Python
21	912	Sort an Array	Python
22	88	Merge Sorted Array	Python
23	75	Sort Colors	Python
24	23	Merge k Sorted Lists	Python
25	973	K Closest Points to Origin	Python
26	701	Insert into a Binary Search Tree	Python
27	94	Binary Tree Inorder Traversal	Python
28	110	Balanced Binary Tree	Python
29	230	Kth Smallest Element in a BST	Python
30	102	Binary Tree Level Order Traversal	Python
31	199	Binary Tree Right Side View	Python
32	105	Construct Binary Tree from Preorder and Inorder Traversal	Python
33	450	Delete Node in a BST	Python
34	217	Contains Duplicate	Python
35	1	Two Sum	Python
36	242	Valid Anagram	Python
37	146	LRU Cache	Python
38	112	Path Sum	Python
39	78	Subsets	Python
40	39	Combination Sum	Python
41	733	Flood Fill	Python
42	200	Number of Islands	Python
43	695	Max Area of Island	Python
44	1091	Shortest Path in Binary Matrix	Python
45	994	Rotting Oranges	Python
46	344	Reverse String	Python
47	125	Valid Palindrome	Python
48	680	Valid Palindrome II	Python
49	1768	Merge Strings Alternately	Python
50	26	Remove Duplicates from Sorted Array	Python
51	167	Two Sum II - Input Array Is Sorted	Python
52	169	Majority Element	Python
53	219	Contains Duplicate II	Python
54	14	Longest Common Prefix	Python
55	49	Group Anagrams	Python
56	35	Search Insert Position	Python
57	69	Sqrt(x)	Python
58	198	House Robber	Python
59	62	Unique Paths	Python
60	63	Unique Paths II	Python
61	1143	Longest Common Subsequence	Python
62	133	Clone Graph	Python
63	703	Kth Largest Element in a Stream	Python
64	1046	Last Stone Weight	Python
65	973	K Closest Points to Origin (Heap)	Python
66	215	Kth Largest Element in an Array	Python
67	207	Course Schedule	Python
68	11	Container With Most Water	Python
69	150	Evaluate Reverse Polish Notation	Python
70	232	Implement Queue using Stacks	Python
71	141	Linked List Cycle	Python
72	121	Best Time to Buy and Sell Stock	Python
73	136	Single Number	Python
74	144	Binary Tree Preorder Traversal	Python
75	145	Binary Tree Postorder Traversal	Python
76	226	Invert Binary Tree	Python
77	104	Maximum Depth of Binary Tree	Python
78	543	Diameter of Binary Tree	Python
79	100	Same Tree	Python
80	268	Missing Number	Python
81	67	Add Binary	Python
82	867	Transpose Matrix	Python
83	202	Happy Number	Python
84	66	Plus One	Python
85	73	Set Matrix Zeroes	Python
86	168	Excel Sheet Column Title	Python
87	2807	Insert Greatest Common Divisors in Linked List	Python
88	572	Subtree of Another Tree	Python
89	53	Maximum Subarray	Python
90	303	Range Sum Query - Immutable	Python
91	724	Find Pivot Index	Python
92	1991	Find the Middle Index in Array	Python
93	304	Range Sum Query 2D - Immutable	Python
94	238	Product of Array Except Self	Python
95	876	Middle of the Linked List	Python
96	1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Python
97	15	3Sum	Python
98	18	4Sum	Python
99	90	Subsets II	Python
100	77	Combinations	Python
101	17	Letter Combinations of a Phone Number	Python
102	46	Permutations	Python
103	47	Permutations II	Python
104	208	Implement Trie (Prefix Tree)	Python
105	211	Design Add and Search Words Data Structure	Python
106	79	Word Search	Python
107	128	Longest Consecutive Sequence	Python
108	684	Redundant Connection	Python
109	1971	Find if Path Exists in Graph	Python
110	1791	Find Center of Star Graph	Python
111	252	Meeting Rooms	Python
112	57	Insert Interval	Python
113	56	Merge Intervals	Python
114	435	Non-overlapping Intervals	Python
115	253	Meeting Rooms II	Python
116	213	House Robber II	Python
117	5	Longest Palindromic Substring	Python
118	647	Palindromic Substrings	Python
119	91	Decode Ways	Python
120	322	Coin Change	Python
121	261	Graph Valid Tree	Python
122	210	Course Schedule II	Python
123	323	Number of Connected Components in an Undirected Graph	Python
124	1319	Number of Operations to Make Network Connected	Python
125	547	Number of Provinces	Python
126	36	Valid Sudoku	Python
127	130	Surrounded Regions	Python
128	567	Permutation in String	Python
129	40	Combination Sum II	Python
130	746	Min Cost Climbing Stairs	Python
131	981	Time Based Key-Value Store	Python
132	162	Find Peak Element	Python
133	958	Check Completeness of a Binary Tree	Python
134	1014	Best Sightseeing Pair	Python
135	28	Find the Index of the First Occurrence in a String	Python
136	22	Generate Parentheses	Python
137	974	Subarray Sums Divisible by K	Python
138	287	Find the Duplicate Number	Python
139	1448	Count Good Nodes in Binary Tree	Python
140	2	Add Two Numbers	Python
141	7	Reverse Integer	Python
142	50	Pow(x, n)	Python
143	138	Copy List with Random Pointer	Python
144	416	Partition Equal Subset Sum	Python
145	42	Trapping Rain Water	Python
146	239	Sliding Window Maximum	Python