#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using namespace std;


int main()
{
    long long n, sum1 = 0;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    sort(a.begin(), a.end(), greater());
    for (int i = 0; i < n; i++){
        if (a.size()){
            for (int j = 0; j < (1 << i); j++){
                sum1 += i*a[0];
                a.erase(a.begin());
            }
        } else break;
    }
    cout << sum1 << endl;
}