n = int(input())
x = list(map(int, input().split()))
y = list(map(int, input().split()))

pa = []
for i in range(n):
	pa.append((x[i], 0))
	pa.append((y[i], 1))
pa.sort()

cntx = 0
cnty = 0
for i in range(n):
	if pa[i][1] == 0:
		cntx += 1
	else:
		cnty += 1

mod = 998244353
ans = 1
for i in range(cntx):
	ans *= i + 1
	ans %= mod
	
for i in range(cnty):
	ans *= i + 1
	ans %= mod

print(ans)