Two Sum II - Input Array Is Sorted.java

https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/
class Solution {
    public int[] twoSum(int[] numbers, int target) {
        int low = 0;
        int high = numbers.length - 1;
        
        while(low < high){
            int sum = numbers[low] + numbers[high];
            if(sum == target)
                return new int[]{low+1, high+1};
            
            else if(sum < target)
                low++;
            
            else
                high--;
        }
        
        // return new int[]{-1};
                throw new IllegalArgumentException("No solution");
    }
}