#include <bits/stdc++.h>

using namespace std;

int main(){
    int n, cnt = 0;
    cin >> n;
    long long ans = 0;
    vector<int> calories(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> calories[calories_i];
    }
    sort(calories.rbegin(), calories.rend());
    for(int calories_i = 0; calories_i < n; ++calories_i) {
       ans += (1LL << cnt) * calories[calories_i];
       ++cnt;
    }
    cout << ans << endl;
    return 0;
}