N = int(input())

p = 998244353
PN = 2  * 10 ** 5 + 100 
fact = [1, 1]
factinv = [1, 1]
inv = [0, 1]

def cmb(n, r, p):
    if (r < 0) or (n < r):
        return 0
    r = min(r, n - r)
    return fact[n] * factinv[r] * factinv[n-r] % p


for i in range(2, PN + 1):
    fact.append((fact[-1] * i) % p)
    inv.append((-inv[p % i] * (p // i)) % p)
    factinv.append((factinv[-1] * inv[-1]) % p)


po = [0]*(PN)
po[0] = 1
for i in range(1,N+2):
    po[i] = po[i-1]*2%p

ans = 0
for i in range(0,N+1,2):
    ans = (ans+(cmb(N,i,p)*2*po[abs(N-(i*2))]))%p
print(ans)