N = int(input())
X = list(map(int,input().split()))
Y = list(map(int,input().split()))
mod = 998244353
Z = []
for x in X:
  Z.append((x,0))
for y in Y:
  Z.append((y,1))
Z.sort()
x = 0
y = 0
for i in range(N):
  c,j = Z[i]
  if j == 0:
    x += 1
  else:
    y += 1

ans = 1
for i in range(1,x+1):
  ans *= i
  ans %= mod
for i in range(1,y+1):
  ans *= i
  ans %= mod
print(ans)