#define _CRT_SECURE_NO_WARNINGS
#include <vector>
#include <map>
#include <set>
#include <complex>
#include <ctime>
#include <iostream>
#include <cmath>
#include <stack>
#include <sstream>
#include <stdio.h>
#include <algorithm>
#include <queue>
#include <cstring>
#include <cassert>
#include <iomanip>
#include <math.h>

using namespace std;


int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    srand(unsigned(time(nullptr)));
   // freopen("input.txt", "r", stdin);
   // freopen("output.txt", "w", stdout);
    
    long long n;
    cin >> n;
    vector<long long> a;
    for (int i = 0; i < n; i++)
    {
        long long x;
        cin >> x;
        a.push_back(x);
    }
    sort(a.rbegin(), a.rend());
    long long d = 1;
    long long f = 0;
    for (int i = 0; i < n; i++)
    {
        f += d * a[i];
        d *= 2;
    }
    cout << f;
}