#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> calories(n);
    long miles = 0;
    long times  = 1;
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories.begin(), calories.end());
    for(int calories_i = n -1 ; calories_i >=0; calories_i--){
        miles += calories[calories_i] * times;
        times = times << 1;
    }
    cout << miles;
    // your code goes here
    return 0;
}