#include <fstream>
#include <algorithm>

using namespace std;

ifstream in("sortari2.in");
ofstream out("sortari2.out");

const int N = 2010;
const int MOD = 999017;

int fib[N];

int main() {
    int n, i, j, fact, sum;

    in >> n;

    fib[1] = fib[2] = 1;
    for(i = 3; i <= 2*n - 1; i++) {
        fib[i] = (fib[i - 1] + fib[i - 2]) % MOD;
    }

    for(fact = 1, i = 2; i <= n; i++) {
        fact = 1LL * fact * i % MOD;
    }

    out << (fact + MOD - fib[2*n - 1]) % MOD << '\n';
    return 0;
}