#include <bits/stdc++.h>

using namespace std;
#define int long long
const int p=998244353;
int po(int a,int b) {if(b==0) return 1; if(b==1) return a; if(b%2==0) {int u=po(a,b/2);return (u*u)%p;} else {int u=po(a,b-1);return (a*u)%p;}}
int inv(int x) {return po(x,p-2);}
const int maxn=2e5+5;
int fact[maxn];int invf[maxn];int invm[maxn];
int32_t main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    fact[0]=1;for(int i=1;i<maxn;++i) fact[i]=(fact[i-1]*i)%p;
    for(int i=0;i<maxn;++i) invf[i]=inv(fact[i]);
    for(int i=0;i<maxn;++i) invm[i]=inv(i);
    int n;cin>>n;
    if(n<=3) {cout<<0;return 0;}
    int res=0;
    for(int a=2;a<=n-2;++a)
    {
        int b=n-a;
        int ans=fact[n];
        ans*=invf[a-2];ans%=p;ans*=invf[b-2];ans%=p;
        ans*=invm[a];ans%=p;ans*=invm[b];ans%=p;
        ans*=invm[n-1];ans%=p;ans*=ans;ans%=p;
        res+=ans;res%=p;
    }
    cout<<(res%p+p)%p;
    return 0;
}