# coding: utf-8

def factorial(x):
    y=1
    for i in range(1,x+1):
        y=y*i%998244353
    return y

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

X.sort()
Y.sort()
Y.reverse()
M=0
for j in range(N):
    if X[j]>Y[j]:
        break
    M+=1
print(factorial(M)*factorial(N-M)%998244353)