#include <bits/stdc++.h>
using namespace std;

int main()
{
	int n;
	cin >> n;
	vector<int> A( n );
	for( int i = 0; i < n; i++ ) cin >> A[i];

	sort( A.begin(), A.end(), greater<int>() );
	long long ans = 0;
	int k = 0;
	int i = 0;
	while( i < n ) {
		int num = 1 << k;
		while( num && i < n ) {
			ans += A[i] * k;
			num--;
			i++;
		}
		k++;
	}

	cout << ans << endl;
}