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