1. Two Sum★
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题目内容: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 thesame element twice.
Example: Given nums = [2, 7, 11, 15], target = 9, Because nums[0] + nums[1] = 2 + 7 = 9, return [0,1].
题目分析:Array Hash table
题目要求输入的是和队列的数值相关的值,输出的适合队列的索引相关的值,那么可以将队列存储在Map当中,Map中的Key是队列中的数值,Value是队列中与数值相关的索引。注意Map的定义语句:
Map <Integer, Integer> map = new HashMap <Integer, Integer>();
题目代码:
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