leetcode

1. Two Sum

Brute-force code

Runtime: 38 ms, faster than 45.63% of Java online submissions for Two Sum.
Memory Usage: 44.7 MB, less than 54.83% of Java online submissions for Two Sum.

Map code

Runtime: 2 ms, faster than 97.62% of Java online submissions for Two Sum.
Memory Usage: 44.8 MB, less than 54.83% of Java online submissions for Two Sum.