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

MOD = 998244353
left = 0
for i in range(N):
    if X[i] > Y[i]:
        break
    left += 1
right = N-left

P = [0, 1]
for i in range(2, N+1):
    P.append(P[-1]*i%MOD)

if left == 0:
    print(P[right])
elif right == 0:
    print(P[left])
else:
    print(P[left]*P[right]%MOD)