#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    long long int ans=0;
    int count=0;
    cin >> n;
    vector<long long int> cal(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> cal[calories_i];
    }
    sort(cal.rbegin(), cal.rend());
    for(int i=0;i<n;i++)
        {
        ans+=(cal[i]<<count);
        count++;
    }
    cout<<ans<<"\n";
    // your code goes here
    return 0;
}