#include <bits/stdc++.h>
#include <algorithm>
#include <math.h>

using namespace std;

int main(){
    int n,i;
    cin >> n;
    int calories[n];
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories,calories+n);
     long long int ans=0;
    for(i=n-1;i>=0;i--)
        {
        ans=ans+pow(2,n-1-i)*calories[i];
    }
    cout << ans;
    // your code goes here
    return 0;
}