#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];
    }
    
    long long int total = 0;
    long long int p2 = 1;
    sort(calories.begin(), calories.end());
    for (int i = n-1; i >= 0; i--){
        total += calories[i] * p2;
        p2 *= 2;
    }
    cout << total << endl;
    return 0;
}