#include <bits/stdc++.h>

using namespace std;

int main ()
{
	int n;
	cin >> n;
	vector <int> arr (n);
	for (int i = 0; i < n; i++) cin >> arr[i];
	sort(arr.begin(),arr.end());
	reverse(arr.begin(),arr.end());
	long long anw = 0;
	for (int i = 0; i < n; i++) anw += (1LL<<i)*arr[i];
	cout << anw << endl;
}