#include <iostream>
#include<vector>

using namespace std;

using i64 = long long;
const int P = 998244353;

int power(int a, int b)
{
    int res = 1; 
    while(b)
    {
    	if(b & 1) res = (i64)res * a % P;
    	a = (i64)a * a % P;
    	b >>= 1;
	}
	
	return res;
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
    int n;
    cin >> n;
    
    vector<int> fac(n + 1), invfac(n + 1);
    fac[0] = 1,invfac[0] = 1;
    for (int i = 1; i <= n; i++)
	{
		fac[i] = 1ll * fac[i - 1] * i % P;
		invfac[i] = 1ll * invfac[i-1] * power(i,P-2) % P;
	}
    
    int ans = 0;
    for (int i = 1; n - i >= i - 1; i++)
        ans = (ans + 1LL * fac[n - i] * invfac[n - i - (i - 1)] % P * fac[n - i]) % P;
    
    cout << ans << endl;
    
    return 0;
}