#include <fstream>
#include<iostream>
#include <cmath>
using namespace std;




int main()
{
    ifstream fin("culori.in");
    ofstream fout("culori.out");
    long long cmp=0,x,n;
    fin>>n;
    if (n==1)
        fout<<5<<endl;
    else
    {
        if (n==2)
            fout<<8<<endl;
        else
        {
            if (n==3)
                fout<<14<<endl;
            else
            {
                if (n%2==0)
                    cmp=8;
                else
                    cmp=14;

                x=n/2;
                double k=3;
                int l;
                l=pow(k,x-1);
                cmp=cmp*round(l);
                fout<<cmp<<endl;
            }
        }
    }
    fin.close();
    fout.close();
}