#include <bits/stdc++.h>

using namespace std;

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