#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;

    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    reverse(a.begin(), a.end());

    ll s = 0;
    int k = 0, l = 0;
    for (int i = 0; i < n; i++) {
        s += a[i] * k;
        l++;
        if (l >= 1 << k) {
            k++;
            l = 0;
        }
    }

    cout << s << endl;

    return 0;
}