MOD=998244353

n=int(input())

inv=[1]*(n+1)
fact=[1]*(n+1)
factinv=[1]*(n+1)
for i in range(2,n+1):
    inv[i]=pow(i, -1, MOD)
    fact[i]=fact[i-1]*i
    fact[i]%=MOD
    factinv[i]=factinv[i-1]*inv[i]
    factinv[i]%=MOD

ans=0
i=1
while 2*i<=n:
    tmp=fact[n]
    tmp*=factinv[i]
    tmp%=MOD
    tmp*=factinv[i]
    tmp%=MOD
    tmp*=factinv[n-2*i]
    tmp%=MOD
    ans+=tmp
    ans%=MOD
    i+=1
if n>1:
    ans*=inv[2]
ans%=MOD

print(ans)