let n = Int(readLine()!)!

let X = readLine()!.split(separator: " ").map{Int($0)!}
let Y = readLine()!.split(separator: " ").map{Int($0)!}

var arr = [[Int]]()
for i in X{
    arr.append([0,i])
}
for i in Y{
    arr.append([1,i])
}
arr.sort{ $0[1] < $1[1] }

var cnt = 0
for i in 0..<n{
    if arr[i][0] == 0{
        cnt += 1
    }
}

let mod = 998244353
func factorial(_ x: Int)->Int{
    var a = 1
    if x > 0{
    for i in 1...x{
        a *= i
        a %= mod
    }
    }
    return a
}

let ans = factorial(cnt) * factorial(n-cnt) % mod
print(ans)