167. Two Sum II - Input array is sorted

class Solution {
public:
vector<int> twoSum(vector<int>& numbers, int target) {
int i=0;
int j=numbers.size()-1;
while(1)
{
int sum=numbers[i]+numbers[j];
if(sum<target)
i++;
else if(sum>target)
j--;
else
break;
}
vector<int> index={i+1,j+1};
return index;
}
};