#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<unsigned long long>());
    unsigned long long ans=0;
    for(int i=0; i<n; i++){
        unsigned long long val=pow(2, i);
        ans+=calories[i]*val;
    }
    cout << ans << endl;
    return 0;
}