def nCr(n,r):
    return (F[n]*G[r]*G[n-r])%Mod
N=int(input())
Mod=998244353

F=[0]*(N+1)
F[0]=1
for i in range(1,N+1):
    F[i]=(i*F[i-1])%Mod

G=[0]*(N+1)
G[N]=pow(F[N],Mod-2,Mod)
for k in range(N-1,-1,-1):
    G[k]=(G[k+1]*(k+1))%Mod

S=0
for k in range(0,N+1,2):
    S+=2*pow(2,abs(2*k-N),Mod)*nCr(N,k)
    S%=Mod
print(S)