MOD = 998244353

n = int(input())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))
Z = X[:] + Y[:]
Z.sort()
z = Z[n - 1]
x = sum(x <= z for x in X)
ans = 1
for i in range(1, x + 1):
    ans *= i
    ans %= MOD
x = n - x
for i in range(1, x + 1):
    ans *= i
    ans %= MOD
print(ans)