#include<cstdio>
#include<iostream>
#define RI register int
#define CI const int&
using namespace std;
const int N=1e7+5,mod=998244353;
int n,fact[N],ifac[N];
inline int quick_pow(int x,int p=mod-2,int mul=1)
{
    for (;p;p>>=1,x=1LL*x*x%mod) if (p&1) mul=1LL*mul*x%mod; return mul;
}
inline void init(CI n)
{
    fact[0]=1; for (RI i=1;i<=n;++i) fact[i]=1LL*fact[i-1]*i%mod;
    ifac[n]=quick_pow(fact[n]); for (RI i=n-1;i>=0;--i) ifac[i]=1LL*ifac[i+1]*(i+1)%mod;
}
inline int C(CI n,CI m)
{
    if (n<0||m<0||n<m) return 0;
    return 1LL*fact[n]*ifac[m]%mod*ifac[n-m]%mod;
}
int main()
{
    scanf("%d",&n); init(n); int ans=0;
    for (RI i=1;i<=n;++i) (ans+=1LL*C(n-i,i-1)*fact[i-1]%mod*fact[n-i]%mod)%=mod;
    return printf("%d",ans),0;
}