use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let n: Vec<u8> = s.split_whitespace().flat_map(str::parse).collect();
	let f =
		n[2..].iter().any(|&c| c >= n[1]) && n[2..].iter().any(|&c| c <= n[1]);
	println!("{}", if f { "Yes" } else { "No" })
}