leetcode

Array

#	Title	Solution
1	Two Sum	C
3	3Sum	C
18	4Sum	C
27	Remove Element	C
27	Remove Element	Go

String

#	Title	Solution
3	Longest Substring Without Repeating Characters	C
5	Longest Palindromic Substring	C
6	ZigZag Conversion	C
8	String to Integer (atoi)	C
14	Longest Common Prefix	C
125	Valid Palindrome	C
929	Unique Email Addresses	C

HASH TABLE:

#	Title	Solution
204	Count primes	C
209	Word Pattern	C
771	Jewels and Stones	C

Backtracking

#	Title	Solution
17	Letter Combinations of a Phone Number	C
40	Combination Sum II	C
79	Word Search	C

Dynamic Programming

#	Title	Solution
5	Longest Palindromic Substring	C
121	Best Time to Buy and Sell Stock	C

Math

#	Title	Solution
7	Reverse Integer	C
12	Integer to Roman	C
13	Roman to Integer	C