#include <bits/stdc++.h>
using namespace std;

#define int long long
#define double long double

#define pii pair<int, int>

#define MOD 20210108

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
#ifdef CB
	freopen("be1.txt", "r", stdin);
//	freopen("out.txt", "w", stdout);
#endif
	int N;
	cin >> N;
	vector<int> v(N + 1);
	v[0] = 1;
	v[1] = 0;
	v[2] = 2;
	v[3] = 2;
	for (int i = 4; i <= N; i++) {
		v[i] = v[i - 2] * 2 + v[i - 3] * 2;
		v[i] %= MOD;
	}
	cout << v[N] << endl;
	return 0;
}