给一个整形数组，给出一个值，当这个值是数组某些数字的和，求出数组下标的值

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Given an array of integers, find two numbers such that they add up to a specific target number.

The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based.

You may assume that each input would have exactly one solution.

Input: numbers={2, 7, 11, 15}, target=9
Output: index1=1, index2=2

给一个整形数组，给出一个值，当这个值是数组某些数字的和，求出数组下标的值

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原文地址：http://www.cnblogs.com/zhanggl/p/4812104.html