#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int n;
    cin >> n;
    vector<long long int> calories(n);
    for(long long int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    long long int j=0;
    long long int sum=0;
    sort(calories.rbegin(),calories.rend());
    for(long long int i=0;i<n;i++)
        {
        sum=sum+(pow(2,j)*calories[i]);
        j++;
    }
    cout<<sum<<"\n";
    return 0;
}