#include <bits/stdc++.h>
#define mod 999017
using namespace std;

typedef long long i64;

int main()
{
	ifstream in("sortari2.in");
	ofstream out("sortari2.out");

	int n;

	in >> n;

	if (n == 1) {
		out << 0 << '\n';
	}
	else if (n == 2) {
		out << 0 << '\n';
	}
	else {
		i64 bune = 1LL * (n - 1) * n + 1;
		i64 ans = 1;
		for (int i = 2; i <= n; i++)
			ans = 1LL * i * ans % mod;
		i64 r = ans - bune;
		r %= mod;
		out << (r + mod) % mod << '\n';
	}

}