N=int(input())
X=list(map(int,input().split()))
Y=list(map(int,input().split()))
Z=[(x,0) for x in X]+[(y,1) for y in Y]
Z.sort()
count=0
for i in range(N):
    if Z[i][1]==1:
        count+=1
fr=[1]
p=998244353
for i in range(1,N+1):
    fr.append(fr[-1]*i%p)
print(fr[count]*fr[N-count]%p)