#include<bits/stdc++.h>
using namespace std;
constexpr int M=1e7+5,mod=998244353;
int n,ans,fac[M],ifac[M];
int read(){
	int x=0;char ch=getchar();
	while (!isdigit(ch)) ch=getchar();
	while (isdigit(ch)) x=x*10+ch-48,ch=getchar();
	return x;
}
int qpow(int x,int n){
	int s=1; while (n){
		if (n&1) s=1ll*s*x%mod;
		x=1ll*x*x%mod; n>>=1;
	} return s;
}
void init(int n){
	for (int i=fac[0]=1;i<=n;i++) fac[i]=1ll*fac[i-1]*i%mod;
	ifac[n]=qpow(fac[n],mod-2);
	for (int i=n;i;i--) ifac[i-1]=1ll*ifac[i]*i%mod;
}
int main(){
	n=read();init(n);
	for (int i=1;(i<<1)-1<=n;i++)
		ans=(ans+1ll*fac[n-i]*ifac[n-(i<<1)+1]%mod*fac[n-i])%mod;
	printf("%d\n",ans);
    return 0;
}