#![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, $t)).collect::>() }; ($next:expr, chars) => { read_value!($next, String).chars().collect::>() }; ($next:expr, usize1) => { read_value!($next, usize) - 1 }; ($next:expr, $t:ty) => { $next().parse::<$t>().expect("Parse error") }; } }