#include <iostream>
//#include <fstream>

using namespace std;

//ifstream cin("toronyepites.in");
//ofstream cout("toronyepites.out");

long long n,i,a,b,c,d,e,M=20210108;

int main()
{
    cin>>n;
    if(n==1) cout<<2;
    if(n==2) cout<<4;
    if(n==3) cout<<10;
    else
    {
        a=2;
        b=2;
        c=4;
        d=10;
        for(i=4;i<=n;++i)
        {
            e=(((2*d)%M)+(2*b)%M)%M;
            a=b%M;
            b=c%M;
            c=d%M;
            d=e%M;
        }
        cout<<e;
    }
    return 0;
}