#include <iostream>
#include <deque>
#define P 20210108

using namespace std;
deque <int> v;
long long n,i,j,a,b;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin>>n;
    v.push_back(1);
    v.push_back(1);
    v.push_back(2);
    v.push_back(2);
    v.push_back(4);
    if (n<=4) cout<<v[n];
    else
    {
        i=4;
        while(i<n)
        {
            i++;
            a=(2*v[3]%P+2*v[2]%P)%P;
            v.pop_front();
            v.push_back(a);
        }
        cout<<v[4];
    }
    return 0;
}