n = int(input())
a = list(map(int, input().split()))
b = list(map(int, input().split()))
a.sort()
b.sort()

ans = 0
i = 0
j = 0
for _ in range(n):
    if a[i] < b[j]:
        i += 1
    else:
        j += 1
mod = 998244353
def f(x):
    ans = 1
    for i in range(x):
        ans *= i + 1
        ans %= mod
    return ans
# print(i)
print(f(i) * f(n-i) % mod)