README.md

"# LeetcodeRepository"

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum
0014-longest-common-prefix	Easy
0015-3sum
0150-evaluate-reverse-polish-notation

Hash Table

Problem Name	Difficulty
0001-two-sum
0017-letter-combinations-of-a-phone-number

Two Pointers

Problem Name	Difficulty
0015-3sum

Sorting

Problem Name	Difficulty
0015-3sum

String

Problem Name	Difficulty
0014-longest-common-prefix	Easy
0017-letter-combinations-of-a-phone-number
0020-valid-parentheses	Easy

Backtracking

Problem Name	Difficulty
0017-letter-combinations-of-a-phone-number

Math

Problem Name	Difficulty
0150-evaluate-reverse-polish-notation

Stack

Problem Name	Difficulty
0020-valid-parentheses	Easy
0150-evaluate-reverse-polish-notation

Database

Problem Name	Difficulty
0175-combine-two-tables
0176-second-highest-salary
0177-nth-highest-salary

Trie

Problem Name	Difficulty
0014-longest-common-prefix	Easy