167-Two-Sum-II-Input-array-is-sorted.js

// 167. Two Sum II - Input array is sorted [Easy]
// https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/

/**
 * @param {number[]} numbers
 * @param {number} target
 * @return {number[]}
 */
const twoSum = (numbers, target) => {
    let left = 0;
    let right = numbers.length - 1;

    while (left < right) {
        const sum = numbers[left] + numbers[right];

        if (sum === target) {
            return [left + 1, right + 1];
        } else if (sum < target) {
            left++;
        } else {
            right--;
        }
    }
};