#include <bits/stdc++.h>

using namespace std;

int main() {
    long long n;
    cin >> n;
    vector<long long> calories(n);
    for(long long calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    long long ans = 0;
    sort (calories.begin(), calories.end());
    long long i=0;
    for (long long calories_i = n-1; calories_i >= 0; calories_i--) {
        ans = ans + calories[calories_i]*pow(2,i);
        i++;
    }
    cout << ans << endl;
    return 0;
}