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