Hackerrank - Picking Numbers, Save the Prisoner!
[Picking Numbers - 풀이] 더보기 #define pp pair bool comp(pp& left, pp& right) { return left.first < right.first; } int pickingNumbers(vector a) { int result = 0; // set arr to map map arr; for(size_t i = 0 ; i < a.size(); ++i) arr[a[i]]++; // change format for sort vector v(arr.begin(), arr.end()); sort(v.begin(), v.end(), comp); // auto iter = v.begin(); auto next = iter + 1; auto end = v.end(); //..