Mod=998244353 N=int(input()) dp=[0]*(2*N+1) dp[0]=1 facts=[] inv_facts=[] t=1 for i in range(4100+1): facts.append(t) t=t*(i+1)%Mod inv_facts.append(pow(facts[4100],-1,Mod)) for i in range(4100): inv_facts.append(inv_facts[-1]*(4100-i)%Mod) inv_facts.reverse() def Comb(n,k): if(n