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

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

#include <atcoder/modint>
using mint = atcoder::modint998244353;
mint fact[500005], inv[500005];
void init() {
	fact[0] = 1;
	for (int i = 1; i <= 500000; i++) fact[i] = fact[i - 1] * i;
	inv[500000] = fact[500000].inv();
	for (int i = 500000; i >= 1; i--) inv[i - 1] = inv[i] * i;
}
int main() {
	fast_io();
	int n;
	cin >> n;
	init();
	mint ans = 0;
	for (int i = 1; i <= n / 2; i++) {
		ans += fact[n] * inv[i] * inv[i] * inv[n - 2 * i];
	}
	if (n > 1) {
		ans /= 2;
	}
	cout << ans.val() << endl;
}