#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>

using namespace std;

int main(){
    int n;
    long c = 0;
    cin >> n;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories.begin(), calories.end());
    for(int calories_i = n - 1; calories_i >= 0; calories_i--){
      if (calories_i != calories.size())
        c += calories[calories_i] * pow(2, n - calories_i - 1);
    }
    cout << c << endl;
    return 0;
}