N = int(input())
X = list(map(int,input().split()))
Y = list(map(int,input().split()))
X = [(x,"X") for x in X]
Y = [(y,"Y") for y in Y]

Z = X + Y
Z.sort()
xcount = 0
for x,_ in Z[:N]:
    if _=="X":
        xcount += 1
fact = [1]*(N+1)
mod = 998244353
for i in range(N):
    fact[i+1] = (i+1)*fact[i]%mod

print(fact[xcount]*fact[N-xcount]%mod)