#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int n, sum=0;
    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());
    for(int i=n-1;i>=0; i--)
        sum+=calories[i]*pow(2, n-1-i);
    printf("%lli\n", sum);
    return 0;
}