#include <bits/stdc++.h>

using namespace std;
#define int long long

const int mod = 998244353;

const int N =  1e7+10;
int quan[N];

int pmi(int a,int b,int c){
	int ans=1;
	
	while(b){
		if(b&1)ans=(int)ans*a%c;
		a=a*a%c;
		b>>=1;
	}
	
	return ans;
}
 

signed main (){

	int t;
	
	cin>>t;
	
    int ans = 0 ;
	
	quan[0] = 1;
	for(int i=1;i<=t;i++){
		quan[i] = quan[i-1] * i %mod;
	}
	
	for(int i=1;i <= (t+1) / 2 ;i++){
		
		int temp1 = quan[t -i] * quan[t-i] % mod;
		int temp2 = pmi(quan[t-2*i+1],mod-2,mod);
		
		ans = (ans + (temp1 * temp2 % mod) ) % mod;
	}
	
	cout<<ans<<endl;
}