mod = 998244353
N = int(input())
if N % 2 == 1:
    print(0)
    exit()

N //= 2
ans = [0] * (N + 1)

catalan = [1, 1]
for i in range(2, N + 1):
    catalan.append(catalan[-1] * 2 * (2 * i - 1) * pow(i + 1, -1, mod) % mod)

for i in range(2, N + 1):
    ans[i] = (ans[i - 1] + catalan[i - 1] * (i - 1)) % mod  # ( xxx )
    for j in range(1, i):  # xxx (...)
        ans[i] += ans[j] * catalan[i - j - 1] % mod
        ans[i] += catalan[j] * ans[i - j - 1] % mod
        ans[i] += catalan[j] * catalan[i - j - 1] * (i - j - 1) % mod
        ans[i] %= mod

print(ans[N])