#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 miles = 0, dvojka = 1;
    for (int i = n-1; i >= 0; i--) miles += calories[i]*dvojka, dvojka*=2;
    
    cout << miles;
    
    return 0;
}