#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(), greater<int> ());
    long long  ans = 0;
    for(int i = 0 ; i < n ; i++){
        ans += calories[i] * 1LL * 1 << i;
    }
    cout << ans << "\n";
    // your code goes here
    return 0;
}