#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int main(){
    int n,count=0;
    ll ans=0ll;
    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());
    reverse(calories.begin(),calories.end());
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i]; 
       ans+= calories[calories_i]*pow((double)2,(double)count);
       //cout<<"ans:"<<ans<<endl; 
       count++; 
    }
    // your code goes here
    cout<<ans<<endl;
    return 0;
}