#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());
    int nn=calories.size();
    long long ans=calories[nn-1];
    long long pow=2;
    for(int i=nn-2;i>=0;i--){
        ans+=calories[i]*pow;
        pow=2*pow;

    }
    cout << ans << endl;
    // your code goes here
    return 0;
}