vector<int> twoSum(vector<int> &numbers, int target) {

vector<int> result;

int low=0, high = numbers.size()-1;

while (low < high){

if (numbers[low] + numbers[high] == target){

result.push_back(low+1);

result.push_back(high+1);

return result;

}else{

numbers[low] + numbers[high] > target ? high-- : low++;

}

}

return result;

}