LeetCode Solutions

#	Title	Difficulty	Repo	Solution	Notes
1	Two Sum	Easy	ReadMe	Javascript, Python
2	Add Two Numbers	Medium	ReadMe	Javascript, Python	Linked list
3	Longest Substring Without Repeating Characters	Medium	ReadMe	Javascript, Python	Sliding window
8	String to Integer (atoi)	Medium	ReadMe	Javascript
10	Regular Expression Matching	Hard	ReadMe	Javascript, Python
17	Letter Combinations of a Phone Number	Medium	ReadMe	Javascript, Python	Recursion, permutation
19	Remove Nth Node From End of List	Medium	ReadMe	Javascript, Python	Linked list
20	Valid Parentheses	Easy	ReadMe	Javascript, Python	Stack
21	Merge Two Sorted Lists	Easy	ReadMe	Javascript, Python	Linked list
24	Swap Nodes in Pairs	Medium	ReadMe	Javascript, Python	Linked list, recursion
28	Implement strStr()	Easy	ReadMe	Javascript, Python
35	Search Insert Position	Easy	ReadMe	Javascript, Python	BS
36	Valid Sudoku	Medium	ReadMe	Javascript
48	Rotate Image	Medium	ReadMe	Javascript, Python	Matrix
49	Group Anagrams	Medium	ReadMe	Javascript, Python	Array, string
53	Maximum Subarray	Easy	ReadMe	Javascript, Python
54	Spiral Matrix	Medium	ReadMe	Javascript, Python
56	Merge Intervals	Medium	ReadMe	Javascript, Python	Intervals
64	Minimum Path Sum	Medium	ReadMe	Javascript, Python	BFS, dynamic programming
70	Climbing Stairs	Easy	ReadMe	Javascript, Python	Dynamic programming, recursion
74	Search a 2D Matrix	Medium	ReadMe	Javascript, Python	Recursion, binary search
78	Subsets	Medium	ReadMe	Javascript. Python	Subset
83	Remove Duplicates from Sorted List	Easy	ReadMe	Javascript, Python	Linked list
88	Merge Sorted Array	Easy	ReadMe	Javascript, Python
90	Subsets II	Medium	ReadMe	Javascript, Python	Subset
92	Reverse Linked List II	Medium	ReadMe	Javascript, Python	Linked list
94	Binary Tree Inorder Traversal	Easy	ReadMe	Javascript, Python	Binary tree, recursion
98	Validate Binary Search Tree	Medium	ReadMe	Javascript	BST, DFS, In-order
101	Symmetric Tree	Easy	ReadMe	Javascript, Python	BT, recursion
102	Binary Tree Level Order Traversal	Medium	ReadMe	Javascript, Python	BFS, tree
104	Maximum Depth of Binary Tree	Easy	ReadMe	Javascript, Python	Binary tree, recursion
112	Path Sum	Easy	ReadMe	Javascript, Python	Recursion, BT
118	Pascal's Triangle	Easy	ReadMe	Javascript, Python
121	Best Time to Buy and Sell Stock	Easy	ReadMe	Javascript, Python	Dynamic programming
130	Surrounded Regions	Medium	ReadMe	Javascript, Python	DFS, recursion
133	Clone Graph	Medium	ReadMe	Javascript	BFS, graph
141	Linked List Cycle	Easy	ReadMe	Javascript, Python	Linked list, fast-slow pointer
143	Reorder List	Medium	ReadMe	Javascript	Linked List, stack
144	Binary Tree Preorder Traversal	Easy	ReadMe	Javascript, Python	Binary tree, recursion
160	Intersection of Two Linked Lists	Easy	ReadMe	Javascript	Linked list, recursion
167	Two Sum II - Input Array Is Sorted	Easy	ReadMe	Javascript, Python	2 pointers
187	Repeated DNA Sequences	Medium	ReadMe	Javascript, Python	Sliding window
189	Rotate Array	Medium	ReadMe	Javascript, Python
190	Reverse Bits	Easy	ReadMe	Javascript
200	Number of Islands	Medium	ReadMe	Javascript, Python	Recursion, Amazon
203	Remove Linked List Elements	Easy	ReadMe	Javascript, Python	Linked list
206	Reverse Linked List	Easy	ReadMe	Javascript, Python	Linked list
207	Course Schedule	Medium	ReadMe	Javascript, Python	Graph, DFS, Map
208	Implement Trie (Prefix Tree)	Medium	ReadMe	Javascript, Python
210	Course Schedule II	Medium	ReadMe	Javascript, Python	Graph, DFS
213	House Robber II	Medium	ReadMe	Javascript, Python	Dynamic programming
215	Kth Largest Element in an Array	Medium	ReadMe	Javascript, Python
217	Contains Duplicate	Easy	ReadMe	Javascript, Python
219	Contains Duplicate II	Easy	ReadMe	Javascript, Python	Sliding window
220	Contains Duplicate III	Medium	ReadMe	Javascript, Python	Sliding window
226	Invert Binary Tree	Easy	ReadMe	Javascript, Python	BT, recursion
232	Implement Queue using Stacks	Easy	ReadMe	Javascript	Queue
235	Lowest Common Ancestor of a Binary Search Tree	Easy	ReadMe	Javascript, Python	BST, iterative
239	Sliding Window Maximum	Hard	ReadMe	Javascript, Python	Sliding window
242	Valid Anagram	Easy	ReadMe	Javascript, Python
278	First Bad Version	Easy	ReadMe	Javascript, Python	BS, recursion
283	Move Zeroes	Easy	ReadMe	Javascript, Python	two pointers
322	Coin Change	Medium	ReadMe	Javascript, Python	Dynamic programming
344	Reverse String	Easy	ReadMe	Javascript, Python
350	Intersection of Two Arrays II	Easy	ReadMe	Javascript, Python
383	Ransom Note	Easy	ReadMe	Javascript, Python
384	Shuffle an Array	Medium	ReadMe	Javascript, Python
387	First Unique Character in a String	Easy	ReadMe	Javascript, Python
406	Queue Reconstruction by Height	Medium	ReadMe	Javascript, Python
417	Pacific Atlantic Water Flow	Medium	ReadMe	Javascript, Python	DFS, recursion
463	Island Perimeter	Easy	ReadMe	Javascript, Python	DFS, recursion
496	Next Greater Element I	Easy	ReadMe	Javascript, Python	Stack
509	Fibonacci Number	Easy	ReadMe	Javascript, Python	Dynamic programming, recursion
557	Reverse Words in a String III	Easy	ReadMe	Javascript, Python
566	Reshape the Matrix	Easy	ReadMe	Javascript
633	Sum of Square Numbers	Medium	ReadMe	Javascript, Python
653	Two Sum IV - Input is a BST	Easy	ReadMe	Javascript, Python	BST, DFS
665	Non-decreasing Array	Medium	ReadMe	Javascript, Python
677	Merge Two Binary Trees	Easy	ReadMe	Javascript, Python	Tree, recursion
684	Redundant Connection	Medium	ReadMe	Javascript, Python	Graph, DFS
695	Max Area of Island	Medium	ReadMe	Javascript, Python	DFS, recursion
700	Search in a Binary Search Tree	Easy	ReadMe	Javascript, Python	BST, recursion
701	Insert into a Binary Search Tree	Medium	ReadMe	Javascript, Python	BST, recursion
704	Binary Search	Easy	ReadMe	Javascript, Python	Recursion
705	Design HashSet	Easy	ReadMe	Javascript, Python	HashSet/Set
733	Flood Fill	Easy	ReadMe	Javascript, Python	Recursion, DFS
739	Daily Temperatures	Medium	ReadMe	Javascript
746	Min Cost Climbing Stairs	Easy	ReadMe	Javascript, Python	Dynamic programming
763	Partition Labels	Medium	ReadMe	Javascript, Python	Set, Amazon
785	Is Graph Bipartite?	Medium	ReadMe	Javascript, Python	Graph, DFS
789	Escape The Ghosts	Medium	ReadMe	Javascript, Python
811	Subdomain Visit Count	Medium	ReadMe	Javascript, Python	Hash map
914	X of a Kind in a Deck of Cards	Easy	ReadMe	Javascript, Python
938	Range Sum of BST	Easy	ReadMe	Javascript, Python	BST, recursion
977	Squares of a Sorted Array	Easy	ReadMe	Javascript, Python	2 pointer
994	Rotting Oranges	Medium	ReadMe	Javascript, Python	BFS
1091	Shortest Path in Binary Matrix	Medium	ReadMe	Javascript, Python	BFS
1137	N-th Tribonacci Number	Easy	ReadMe	Javascript, Python	Dynamic programming, recursion
1207	Unique Number of Occurrences	Easy	ReadMe	Javascript, Python
1281	Subtract the Product and Sum of Digits of an Integer	Easy	ReadMe	Javascript	Asana
1323	Maximum 69 Number	Easy	ReadMe	Javascript, Python
1423	Maximum Points You Can Obtain from Cards	Medium	ReadMe	Javascript, Python	Sliding window
1521	Find a Value of a Mysterious Function Closest to Target	Hard	ReadMe	Javascript	UNOPTIMIZED
1637	Widest Vertical Area Between Two Points Containing No Points	Medium	ReadMe	Javascript, Python
1642	Furthest Building You Can Reach	Medium	ReadMe	Javascript	UNOPTIMIZED
1647	Minimum Deletions to Make Character Frequencies Unique	Medium	ReadMe	Javascript, Python	Set
1658	Minimum Operations to Reduce X to Zero	Medium	ReadMe	Javascript, Python	Sliding window
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Medium	ReadMe	Javascript, Python
1710	Maximum Units on a Truck	Easy	ReadMe	Javascript, Python
1800	Maximum Ascending Subarray Sum	Easy	ReadMe	Javascript, Python	Subarray
1837	Sum of Digits in Base K	Easy	ReadMe	Javascript, Python
1846	Maximum Element After Decreasing and Rearranging	Medium	ReadMe	Javascript, Python