#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];
    }
    // your code goes here
    sort(calories.begin(), calories.end(), std::greater<int>());
    unsigned long long res = 0, pow = 1L;
    for (int i = 0; i < calories.size(); ++i) {
        res += calories[i]*pow;
        pow *= 2L;
    }
    cout << res;
    
    return 0;
}