#include<bits/stdc++.h>
#include<atcoder/modint>
using namespace std;

int main(){
  using mint=atcoder::modint998244353;
  int n;
  cin>>n;
  mint m=2*n;
  mint k=m*(m-1)*(m-2)*(m-3)/24;
  mint c=k/((m-1)*(m-3));
  mint ans=n+1+c;
  cout<<ans.val()<<endl;
}