#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
        long long ans, a=2, i;
       

    }
    long long ans=0, i, a=2;
    sort(calories.begin(), calories.end());
    reverse(calories.begin(), calories.end());
     ans = calories[0];
            for(i=1; i<n; i++){
               ans +=(calories[i]*a);
                a *=2;  
        }    
        cout<<ans<<endl;
    // your code goes here
    return 0;
}