11399 ATM 문제 풀이 #include #include #include using namespace std; void fast_io(void) { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); } vector v; int main(void) { fast_io(); int sum = 0, n; cin >> n; for (int i = 0; i > num; v.push_back(num); } sort(v.begin(), v.end()); for (int i = 0; i < n;i++) { sum += (v[i] * (n - i)); } cout