#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());
    reverse(calories.begin(), calories.end());
    long long ret = 0;
    for(long long i=0;i<n;i++){
        ret += (1LL << i) * (long long)(calories[i]); 
    }
    cout << ret << endl;
    return 0;
}