#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());
    
    long long sum = 0;
    int j = 0;
    for (int i = calories.size() - 1; i >= 0; --i) {
        sum += pow(2, j) * calories[i];
        j++;
    }
    
    cout << sum;
    
    return 0;
}