import math

n = int(input())
x = [(int(z), 0) for z in input().split()]
y = [(int(z), 1) for z in input().split()]

cnt = 0
for _, c in sorted(x + y)[:n]:
	cnt += c
	
m = 998244353
a = math.factorial(cnt)
a %= m
b = math.factorial(n - cnt)
b %= m

print(a * b % m)