two-sum-ii-input-array-is-sorted (https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/description/)

main.go

package main

import (
	"fmt"
)

func main() {
	nums := []int{2, 7, 11, 15}
	target := 9
	fmt.Println(twoSum(nums, target)) // [1, 2]
}

func twoSum(numbers []int, target int) []int {
	low, high := 0, len(numbers)-1
	sum := 0
	for low < high {
		sum = numbers[low] + numbers[high]
		if sum == target {
			return []int{low + 1, high + 1}
		} else if sum < target {
			low++
		} else {
			high--
		}
	}
	return []int{}
}