#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];
    }
    sort(calories.begin(), calories.end());
    long long ans = 0;
    long long tp = 1;
    for(int i = n - 1; i >= 0; i--) {
        ans += calories[i] * tp;
        tp *= 2L;
    }
    cout<<ans<<endl;
    // your code goes here
    return 0;
}