import sys
input = sys.stdin.readline

mod=998244353

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

X.sort()
Y.sort(reverse=True)

A=0
for i in range(N):
    if X[i]>Y[i]:
        A+=1

ANS=1
for i in range(1,A+1):
    ANS=ANS*i%mod

for i in range(1,N-A+1):
    ANS=ANS*i%mod

print(ANS)