func twoSum(numbers []int, target int) []int {
var last_i int
for i:=0;i<len(numbers)-1;i++ {
if i!=0 && last_i == numbers[i] {
continue
}
for j:=i+1;j<len(numbers);j++ {
if numbers[i] + numbers[j] == target {
return []int{i+1, j+1}
}
if numbers[i] + numbers[j] > target {
break
}
}
last_i = numbers[i]
}
return []int{}
}