#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<long 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 sum=0;
    long long int two=1;
    for(int i=n-1;i>=0;i--){
        sum+=(two*calories[i]);
        two*=2;
    }
    cout<<sum;
    // your code goes here
    return 0;
}