#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 long ans = 0;
    for(int i=0; i<n; i++)
        ans += (1LL<<i)*calories[n-i-1];
    cout << ans << endl;
    return 0;
}