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

P = 998244353
X.sort(reverse = True)
Y.sort(reverse = True)
count = 0
for _ in range(N):
	u = X[-1]
	v = Y[-1]
	if u < v:
		count += 1
		X.pop()
	else:
		Y.pop()

U = count
V = N - count
ans = 1
for _ in range(2):
	U,V = V,U
	for i in range(U):
		ans = ans * i % P
print(ans)