Mod = 998244353
N = int(input())
X = list(map(int, input().split()))
Y = list(map(int, input().split()))
XY = []
for i in range(N):
    XY.append((X[i], 0))
    XY.append((Y[i], 1))
XY.sort()
cnt = 0
for i in range(N):
    if(XY[i][1] == 1):
        cnt += 1
ans = 1
Mod = 998244353
for i in range(1, cnt + 1):
    ans *= i
    ans %= Mod
for i in range(1, N - cnt + 1):
    ans *= i
    ans %= Mod
print(ans)