vector<int> result;

unordered_map<int> map;

for (vector<int>::const_iterator itr = numbers.begin();

itr != numbers.end(); ++itr) {

if (map.cont(target - *itr)) {

result.push_back(map[target - *itr]);

result.push_back(itr - numbers.begin() + 1);

return result;

}

map[*itr] = itr - numbers.begin() + 1;

}

return result;