#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> c(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> c[calories_i];
    }
    // your code goes here
    sort(c.rbegin(), c.rend());
    unsigned long long r = 0, two = 1;
    for (auto x : c) {
        r += (x * two);
        two = two << 1;
    }
    
    cout << r << endl;
    
    return 0;
}