36 双指针

/**
 * @param {number[]} numbers
 * @param {number} target
 * @return {number[]}
 */
var twoSum = function(numbers, target) {
    let i = 0,j = numbers.length - 1;
    while( i <= j) {
        if(numbers[i] + numbers[j] > target) {
            j--
        }else if(numbers[i] + numbers[j] < target) {
            i++
        }else {
            return [i+1,j+1]
        }
    }
};