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

const int MOD = 20210108;

int main()
{
    int n;
    cin >> n;
    vector<int> vec(max(3 + 1, n + 1), 0);
    vec[1] = 2;
    vec[2] = 4;
    vec[3] = 10;
    for (int i=4; i <= n; i++) {
        vec[i] = (2 * vec[i - 1]) % MOD;
        vec[i] = vec[i] + (2 * vec[i - 3]) % MOD;
        vec[i] = vec[i] % MOD;
    }
    cout << vec[n] << '\n';

    return 0;
}