def factorial(n):
    res = 1
    for i in range(1, n+1):
        res *= i
        res %= MOD
    return res


MOD = 998244353
N = int(input())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))

X.sort()
Y.sort(reverse=True)

ans = 1
for i in reversed(range(N)):
    if X[i] < Y[i]:
        ans = factorial(i+1) * factorial(N-i-1) % MOD
        break

print(ans)