LeetCode 刷题记录: 1. Two Sum [Java]

原题

https://leetcode.com/problems/two-sum/

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

思路

使用hashmap查表,拿到数字首先查找余值是否在表内,若在的话直接返回表内的对应值。接着将数字以及index存入表内。

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