#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 int ans = calories[n-1];
    long long int p = 2;
    for(int i=1;i<n;i++){
        ans += calories[n-i-1]*p;
        p *= 2;
    }
    cout<<ans<<"\n";
    return 0;
}