#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
    sort(calories.begin(), calories.end(), greater<int>());
    typedef long long ll;
    ll ans = 0;
    for (int i = 0; i < n; ++i) {
        ans += (1ll << i) * calories[i];
    }
    cout << ans << '\n';
    return 0;
}