#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];
    }
    // your code goes here
    std::sort(calories.begin(), calories.end(), std::greater<int>());
    
    long ans = 0;
    long cur_two_pow = 1;
    long eaten = 0;
    
    for(int i = 0; i < calories.size(); ++i){
        ans += calories[i] * cur_two_pow;
        eaten++;
        cur_two_pow *= 2;
    }
    
    std::cout << ans << std::endl;
    return 0;
}