text: #include <cstdio>
  using namespace std;
  typedef long long ll;
  const ll p=998244353;
  ll qpow(ll x,ll y){
  	ll ans=1;
  	while(y){
  		if(y&1) ans=ans*x%p;
  		x=x*x%p; y>>=1;
  	}
  	return ans;
  }
  int main(){
  	freopen("dream.in","r",stdin);
  	freopen("dream.out","w",stdout);
  	
  	fclose(stdin);
  	fclose(stdout);
  	return 0;
  }
  