#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;
    for(int calories_i = 0; calories_i < n; calories_i++) {
        int t = calories[n - 1 - calories_i];
        ans += (1LL << calories_i) * t;
    }    
    cout << ans << endl;
    return 0;
}