#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> ca(n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> ca[calories_i];
    }
    sort(ca.begin(),ca.end());
    long long ans=0,pw=1;
    for(int i=1,j=ca.size()-1;j>=0;i++,j--)
    {
        ans+=ca[j]*pw;
        pw*=2;
    }
    cout<<ans;
            // your code goes here
    return 0;
}