#![allow(unused_imports, dead_code, unused_macros, unused_variables, non_snake_case, unused_parens)]
use std::cmp::*;
use std::mem::swap;
use std::collections::*;

const MOD:usize = 998244353;
const INF:i64 = 0x7fff_ffff_ffff_ffff;

macro_rules! mulvec {($x:expr; $s:expr) => {vec![$x; $s]};($x:expr; $s0:expr; $( $s:expr );+) => {mulvec![vec![$x; $s0]; $( $s );+ ]};}
macro_rules! outputln {($var:expr)=>{println!("{}",$var)};($var:expr,$($vars:expr),+)=>{print!("{}",$var);outputln!($($vars),+);};}
macro_rules! debugln {($var:expr)=>{println!("{:?}",$var)};($var:expr,$($vars:expr),+)=>{print!("{:?}",$var);debugln!($($vars),+);};}

fn solve() {
    input! {
        n: usize,
		X:[usize;n],
		Y:[usize;n],
    }
	let mut X = X;
	let mut Y = Y;
	X.sort();
	Y.sort();
	Y.reverse();
	// debugln!(X);
	// debugln!(Y);
	let mut m = 0;
	for (x,y) in X.into_iter().zip(Y) {
		if x < y {
			m += 1;
		}else{break;}
	}
	let mut ans = 1;
	for i in 2..=m {
		ans *= i;
		ans %= MOD;
	}
	for i in 2..=(n-m) {
		ans *= i;
		ans %= MOD;
	}

    println!("{}", ans);
}

fn main() {
    std::thread::Builder::new()
        .stack_size(128 * 1024 * 1024)
        .spawn(|| solve()).unwrap()
        .join().unwrap();
}


mod _input {
    // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
    #[macro_export]
    macro_rules! input {
        (source = $s:expr, $($r:tt)*) => {
            let mut iter = $s.split_whitespace();
            let mut next = || { iter.next().unwrap() };
            input_inner!{next, $($r)*}
        };
        ($($r:tt)*) => {
            let stdin = std::io::stdin();
            let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
            let mut next = move || -> String{
                bytes
                    .by_ref()
                    .map(|r|r.unwrap() as char)
                    .skip_while(|c|c.is_whitespace())
                    .take_while(|c|!c.is_whitespace())
                    .collect()
            };
            input_inner!{next, $($r)*}
        };
    }
    #[macro_export]
    macro_rules! input_inner {
        ($next:expr) => {};
        ($next:expr, ) => {};

        ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
            let $var = read_value!($next, $t);
            input_inner!{$next $($r)*}
        };
    }
    #[macro_export]
    macro_rules! read_value {
        ($next:expr, ( $($t:tt),* )) => {
            ( $(read_value!($next, $t)),* )
        };

        ($next:expr, [ $t:tt ; $len:expr ]) => {
            (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
        };

        ($next:expr, chars) => {
            read_value!($next, String).chars().collect::<Vec<char>>()
        };

        ($next:expr, usize1) => {
            read_value!($next, usize) - 1
        };

        ($next:expr, $t:ty) => {
            $next().parse::<$t>().expect("Parse error")
        };
    }
}