N = int(input())
A = list(map(int, input().split()))
B = list(map(int, input().split()))
sA = set(A)
sB = set(B)
C = A + B
C.sort()
n = [0, 0]
for i in range(N) :
	if C[i] in sA :
		n[0] += 1
	else :
		n[1] += 1
ans = 1
mod = 998244353
for a in n :
	for i in range(a) :
		ans *= (i + 1)
		ans %= mod
print(ans)