fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: u64 = s.trim().parse().unwrap();
	let mut a = 1u64;
	for _ in 0..n / 2 {
		a = a * 6 % 998244353;
	}
	println!("{a}")
}