#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    long long int power,i;
    cin >> n;
    vector<int> calories(n);
    long long int ans=0;
    for(int calories_i = 0; calories_i < n; calories_i++)
        {
            
            cin >> calories[calories_i];
            
        }
        sort(calories.begin(),calories.end());
        
        power=1;
        for(i=n-1;i+1;--i)
        {
           // cout<<calories[i]<<" "<<ans<<endl;
            ans=ans+power*calories[i];
            power*=2;
        }

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