#include <bits/stdc++.h>
#include<vector>


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];
    }
    long m=0;
    sort(calories.begin(),calories.end(),std::greater<int>());
    int x=calories.size();
    for(int i=0;i<x;i++){
        m+=(pow(2,i)*calories[i]);
    }
    cout<<m;
    // your code goes here
    return 0;
}