#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());
    long long stepen = 1,ukupno = 0;
    for(int i = n-1; i >= 0; i--){
        ukupno += calories[i]*stepen;
        stepen *= 2;
    }
    cout << ukupno << endl;
    // your code goes here
    return 0;
}