#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 sum = 0;
    sort(calories.begin(),calories.end());
    int ind = 0;
    for(int i = n-1; i >= 0; i--){
      sum += calories[i]*pow(2,ind);
      ind++;
    }
    cout << sum << endl;
    return 0;
}