#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mod  998244353

ll quan(int x, int y) {
	ll ans = 1;
	for (int i = x; i <= y; i++) {
		ans = (ans * i) % mod;
	}
	return ans % mod;
}

int main() {
	int n;
	cin >> n;
	if (n == 1) {
		cout << 1;
		return 0;
	}
	ll ans = 0;
	for (int i = 1; i <=  (n + 1) / 2; i++) {
		ll qw = quan(1, n - i);
		//	cout << n - i << " " << qw << endl;
		ll qe ;
		qe = quan(n - 2 * i + 2, n - i);
		qe %= mod;
		qw %= mod;
		ans = (ans + (qw * qe) % mod) % mod;
		//cout << ans << endl;
		ans %= mod;
	}
	cout << ans % mod;
}