#include<bits/stdc++.h>
#define MO 998244353
using namespace std;
int i,n;
long long ans;
long long jc[10000005][2];
long long qsm(long long x,long long y)
{
  long long res=1;
  while (y)
    {
      if (y&1) res=(res*x)%MO;
      y>>=1;x=(x*x)%MO;
	}
  return res;
}
long long ny(long long x)
{
  return qsm(x,MO-2);
}
long long c(int n,int m)
{
  return jc[n][0]*jc[n-m][1]%MO*jc[m][1]%MO; 
}
int main()
{
  scanf("%d",&n);jc[0][0]=1;jc[0][1]=1;
  for (i=1;i<=n;++i) jc[i][0]=(jc[i-1][0]*i)%MO,jc[i][1]=ny(jc[i][0]);
  ans=0;
  for (i=1;i<=(n+1)/2;++i) 
    ans=(ans+c(n-i,i-1)%MO*jc[n-i][0]%MO*jc[i-1][0]%MO)%MO;
  printf("%lld",ans);
  return 0;
}