#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned ll
#define endl "\n"
#define PII pair<int,int>
const ll INF=0x3f3f3f3f;//3f3f3f3f;
const int mod=998244353;
const int N=1e7+5;
int fac[N],infac[N];
ll ksm(ll a,ll n){
	ll res=1;
	while(n){
		if(n&1) res=res*a%mod;
		a=a*a%mod; n>>=1;
	} return res;
}
void init(){
	fac[0]=infac[0]=1;
	for(int i=1;i<N;i++) fac[i]=1LL*fac[i-1]*i%mod;
	infac[N-1]=ksm(fac[N-1],mod-2);
	for(int i=N-2;i>=1;i--) infac[i]=1LL*infac[i+1]*(i+1)%mod;
}
ll C(int a,int b){
	if(a<b||b<0||a<0) return 0; 
	return 1LL*fac[a]*infac[b]%mod*infac[a-b]%mod;
}
void solve(){
    ll ans=0;
    init();
    int n; cin>>n;
    for(int i=1;i<=n;i++){
    	(ans+=C(n-i,i-1)*fac[i-1]%mod*fac[n-i]%mod)%=mod;
	} cout<<ans<<endl;
}
int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int T=1; //cin>>T;
	while(T--) solve();
}