#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 res = 0;
    for (int i = 0; i < n; i++) {
        res += (long)calories[i] * (1L << (n - i - 1));
    }
    cout << res;
    return 0;
}