#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    long long int ans=0;
    cin >> n;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    // your code goes here
    sort(calories.begin(),calories.end());
    int box=0;
    for(auto i=calories.rbegin();i!=calories.rend();++i){
        ans+=(long long int)pow(2,box)*(*i);
        box++;
    }
    cout<<ans<<endl;
    return 0;
}