167. Two Sum II - Input array is sorted

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.

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

Output: index1=1, index2=2

public class Solution {    public int[] twoSum(int[] numbers, int target) {        int index1=0;        int index2=numbers.length-1;        boolean flag=true;        while(flag){        int l=index1+1,h=index2;        int re=target-numbers[index1];        while(l<=h){        int m=(h+l)/2;        if(re>numbers[m]){        l=m+1;        }        else if(re<numbers[m]){        h=m-1;        }        else {        index2=m;        flag=false;        break;        }        }        index1++;        }        return new int[]{index1,index2+1};    }}

第二种：

public class Solution {    public int[] twoSum(int[] numbers, int target) {        int index1=0;        int index2=numbers.length-1;        while(index1<index2){        int v=numbers[index1]+numbers[index2];        if(v==target){        break;        }        else if(v>target)        index2--;        else        index1++;        }        return new int[]{index1+1,index2+1};    }}