#include <bits/stdc++.h>
#include <iostream>
#include <algorithm>
#include <cmath>
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];
    }
    // your code goes here
    long long int tot=0;
    sort(calories.begin(),calories.end());
    int c =0;
    for(int i=n-1;i>=0;i--)
        {
        tot+=((long long int)pow(2,c)*calories[i]);
        c++;
    }
    cout<<tot<<endl;
    return 0;
}