carloscn / carloscn/structstudy

两数之和(leetcode-1)

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Level-easy 一般问题 数组
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Description

给定一个整数数组 nums 和一个整数目标值 target,请你在该数组中找出 和为目标值 target  的那 两个 整数,并返回它们的数组下标。

你可以假设每种输入只会对应一个答案。但是,数组中同一个元素在答案里不能重复出现。

你可以按任意顺序返回答案。

示例 1:

输入:nums = [2,7,11,15], target = 9
输出:[0,1]
解释:因为 nums[0] + nums[1] == 9 ,返回 [0, 1] 。
示例 2:

输入:nums = [3,2,4], target = 6
输出:[1,2]
示例 3:

输入:nums = [3,3], target = 6
输出:[0,1]
 

提示:

2 <= nums.length <= 104
-109 <= nums[i] <= 109
-109 <= target <= 109
只会存在一个有效答案

来源:力扣(LeetCode)
链接:https://leetcode.cn/problems/two-sum

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