#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef double db;
const int N = 100005 + 5;
const int mod = 998244353;
//#define int long long

ll fp(ll base,ll pow){
    ll result =1;
    while(pow){
        if(pow%2) result=result*base%mod;
        base=base*base%mod;
        pow/=2;
    }
    return result;
}
void solve() {
    ll n;
    cin>>n;
    ll ans=0;
    ll tmp=1;
    for(int i=1;i<=n-1;i++) tmp=tmp*i%mod;
    ll tt=tmp;
    for(int i=1;i<=n;i++){
        ll t2=1;
        ll k=n-i;
        for(int j=1;j<=i-1;j++){
            t2=t2*(k-j+1)%mod;
        }
//        cout<<t2<<' '<<tt<<'\n';
        ans=ans+t2*tt%mod;
        ans%=mod;
        tt=tt*fp(n-i,mod-2)%mod;
    }
    cout<<ans<<'\n';
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cout << fixed << setprecision(1);
    int T = 1;
//    cin >> T;
    while (T--) solve();
    return 0;
}