#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());
    reverse(calories.begin(), calories.end());

    long long int resp = 0;

    for (int i = 0; i < n; i++) {
	resp += (1LL << i) * (long long int) calories[i];
    }
    cout << resp << '\n';
    // your code goes here
    return 0;
}