leetcode 167 Two Sum II - Input array is sorted C++

这个太简单了，不说了。

    vector<int> twoSum(vector<int>& numbers, int target) {        int tail = numbers.size() - 1;        int head = 0;        vector<int> vec;                while(head<tail){            if(numbers[tail]+numbers[head]>target){                tail--;            }else if(numbers[tail]+numbers[head]<target){                head++;            }else{                vec.push_back(head+1);                vec.push_back(tail+1);                return vec;            }        }                return vec;    }