N=int(input());mod=998244353;p=[1]*(N+1);f=p[:];g=p[:]
for i in range(1,N+1):p[i]=p[i-1]*2%mod;f[i]=i*f[i-1]%mod;g[i]=pow(f[i],mod-2,mod)
print(sum(g[k]*g[N-k]*p[abs(N-2*k)]for k in range(0,N+1,2))*2*f[N]%mod)