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.
Example:

Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].

題目很簡單，給出一個數(shù)組和整數(shù)，從數(shù)組中找出兩個數(shù)，使其相加等于該整數(shù)，返回其索引。

代碼如下：

func twoSum(nums []int, target int) []int {
    for key, value := range nums {
        for k, v := range nums {
            if k != key {
                if v+value == target {
                    return []int{key, k}
                }
            }
        }
    }
    return []int{}
}