#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int n;
    int a[55];
    long long res = 0;
    cin >> n;
    for(int i = 1;i <= n;++ i)
           cin >> a[i];
    sort(a + 1, a + n + 1);
    for(int i = n;i >= 1;-- i){
        res += (1ll << (n - i)) * 1ll * a[i];
        
    }
    cout << res << endl;
    return 0;
}