#include<bits/stdc++.h>
#define F first
#define S second
using namespace std;
typedef long long LL;
typedef pair<LL,LL> pr;
inline LL rd(){
	LL x=0,y=1;char c=getchar();
	for(;c<'0'||c>'9';c=getchar())if(c=='-')y=-1;
	for(;c>='0'&&c<='9';c=getchar())x=(x<<1)+(x<<3)+(c^48);
	return x*y;
}
const LL p=998244353,N=100005;
LL qp(LL x,LL y){LL z=1;for(;y;y>>=1,x=x*x%p)if(y&1)z=z*x%p;return z;}
LL n,m,fc[N],iv[N],ifc[N];
int main(){
	n=rd();fc[0]=fc[1]=iv[0]=iv[1]=ifc[0]=ifc[1]=1;
    for(LL i=2;i<=n;++i)fc[i]=fc[i-1]*i%p,iv[i]=iv[p%i]*(p-p/i)%p,ifc[i]=ifc[i-1]*iv[i]%p;
    for(LL i=2,o;i<=n-2;++i){
        LL j=n-i;o=fc[n]*iv[n-1]%p*iv[i]%p*iv[j]%p*ifc[i-2]%p*ifc[j-2]%p;
        m=(m+o*o)%p;
    }
	cout<<m;return 0;
}