Leetcode：167. Two Sum II - Input array is sorted 求数组中的两个数的和等于给定值，求这两个数的下标

Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number.

The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based.

You may assume that each input would have exactly one solution and you may not use the same element twice.

Input: numbers={2, 7, 11, 15}, target=9

Output: index1=1, index2=2

解析：这个题啊 那是非常的简单，题目已经给出了已经排序的条件，所以我们直接类似二分搜索即可，但是我在拿到题的时候，就两个循环在那遍历求解，可以说这是非常不合理的解决方案，并且这个题非常的简单，因为，返回的数组就两个数字，不像可能有多个值的情况。

代码如下：

public static int[] twoSum(int[] numbers, int target) {
int[] rev = new int[2];
int lo=0, hi=numbers.length-1;
while (numbers[lo]+numbers[hi]!=target){
if (numbers[lo]+numbers[hi]<target){
lo++;
} else {
hi--;
}
}
rev[0] = 1+lo;
rev[1] = 1+hi;
return rev;
}