#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];
    }
    sort(c.begin(),c.end());
    int k = c.size();
    long long sum=0;
    for(int i=c.size()-1;i>=0;i--)
    {
        sum+=pow(2,k-i-1)*c[i];
    }
    printf("%lld\n",sum);
    // your code goes here
    return 0;
}