N = int(input())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))
mod = 998244353
P = [1]
for i in range(1,N+1):
    P.append(P[-1]*i)

SX = set(X)
XYH = sorted(X+Y)[:N]
x_cnt = 0
for xyh in XYH:
    if xyh in SX:
        x_cnt+=1
print(P[x_cnt]*P[N-x_cnt]%mod)