#include <bits/stdc++.h>

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];
    }
    // your code goes here

    long int w = 0;
    long int p2 = 1;

    sort(calories.begin(),calories.end());
    for (int i = calories.size()-1; i>=0; i--) {
    	w=w+calories[i]*p2;
    	p2*=2;
    }
    cout << w << endl;
    return 0;
}