fishercoderLeetcode

#	Title	Solutions	Time	Space	Difficulty	Tag	Notes
350	Intersection of Two Arrays II	Solution	O(m+n)	O((m+n)) could be optimized	Easy	HashMap, Binary Search
349	Intersection of Two Arrays	Solution	O(m+n)	O(min(m,n))	Easy	Two Pointers, Binary Search
301	Remove Invalid Parentheses	[Solution]	?	?	Hard	BFS
283	Move Zeroes	Solution	O(n)	O(1)	Easy
278	First Bad Version	Solution	O(logn)	O(1)	Easy	Binary Search
209	Minimum Size Subarray Sum	Solution	O(n)	O(1)	Medium
200	Number of Islands	Union Find DFS	O(m*n)	O(m*n)	Medium	Union Find, DFS
140	Word Break II	Solution	?	O(n^2)	Hard	Backtracking/DFS
139	Word Break	Solution	O(n^2)	O(n)	Medium	DP
133	Clone Graph	Solution	O(n)	O(n)	Medium	HashMap, BFS
117	Populating Next Right Pointers in Each Node II	Solution	O(n)	O(1)	Hard	BFS
116	Populating Next Right Pointers in Each Node	Solution	O(n)	O(1)	Medium	BFS
91	Decode Ways	Solution	O(n)	O(n)	Medium	DP
76	Minimum Window Substring	Solution	O(n)	O(k)	Hard	Two Pointers
67	Add Binary	Solution	O(n)	O(1)	Easy
56	Merge Intervals	Solution	O(n*logn)	O(1)	Hard
23	Merge k Sorted Lists	Solution	O(n*logk)	O(logk)	Hard	Heap
17	Letter Combinations of a Phone Number	Solution	O(n*4^n)	O(n)	Medium	Backtracking
15	3Sum	Solution	O(nlogn)	O(1)	Medium	Two Pointers
10	Regular Expression Matching	Solution	O(m*n)	O(m*n)	Hard	DP
8	String to Integer (atoi)	Solution	O(n)	O(1)	Easy
7	Reverse Integer	Solution	O(1)	O(1)	Easy
2	Add Two Numbers	Solution	O(n)	O(1)	Medium	LinkedList
1	Two Sum	Solution	O(n)/O(n^2)	O(1)/O(n)	Easy	HashMap