int main(int argc, char **argv){ ios_base::sync_with_stdio(false); cin.tie(0); int n; cin>>n; vector<int> rope(n); for(int i = 0; i < n ; i ++) { cin>>rope[i]; } sort(rope.rbegin(), rope.rend()); int answer = 0; for(int i = 0 ; i< n ; i++) { int t = (i+1) * rope[i]; answer = max(answer, t); } cout<<answer<<newline; return 0;}