View Code of Problem 61

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

int main() {
	int t;
	cin >> t;
	while (t--) {
		int n;
		cin >> n;
		vector<int> arr(n);
		for (int i = 0; i < n; i++) 
			cin >> arr[i];
		sort(arr.rbegin(), arr.rend());
		for (int i = 0; i < n; i++) 
			arr[i] *= (i + 1);
		sort(arr.rbegin(), arr.rend());
		cout << arr[0]<<endl;
	}
	return 0;
}