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