1. func twoSum(nums []int, target int) []int {
    2.     for ini, i := range nums {
    3.         for inj, j := range nums {
    4.             if i+j == target && ini != inj {
    5.                 return []int{ini, inj}
    6.             }
    7.         }
    8.     }
    9.     return nil
    10. }
    func twoSum( numbers []int ,  target int ) []int {
    hmap := map[int]int{}
    for i, v := range numbers {
        s := target - v
        if j, ok := hmap[s]; ok {
            if i < j {
                return []int{i + 1, j + 1}
            } else {
                return []int{j + 1, i + 1}
            }
        }
        hmap[v] = i
    }
    return nil
}