using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[] NMi => ReadLine().Split().Select(c => int.Parse(c) - 1).ToArray();
    static int[][] NMap(int n) => Enumerable.Repeat(0, n).Select(_ => NMi).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList;
        var b = NList;
        var aset = new HashSet<int>(a);
        var all = new List<int>(a);
        all.AddRange(b);
        all.Sort();
        var acnt = 0;
        for (var i = 0; i < n; ++i) if (aset.Contains(all[i])) ++acnt;
        var ans = 1L;
        var mod = 998_244_353;
        for (var i = 0; i < acnt; ++i) ans = ans * (i + 1) % mod;
        for (var i = 0; i < n - acnt; ++i) ans = ans * (i + 1) % mod;
        WriteLine(ans);
    }
}