#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<long long> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    // your code goes here
    
    sort(calories.begin(), calories.end());
    
    long long temp = 1;
    
    for (int i = calories.size()-1; i >= 0; i--){
        calories[i] *= temp;
        temp *= 2;
    }
    
    long long sum = 0;
    
    for (int i = 0; i < calories.size(); i++){
        sum += calories[i];
    }
    
    cout << sum << endl;
    
    return 0;
}