fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let mut s = s.trim().split_whitespace();
	let i: i32 = s.next().unwrap().parse().unwrap();
	let j: i32 = s.next().unwrap().parse().unwrap();
	let k: i32 = s.next().unwrap().parse().unwrap();
	
	let mut ans = match (i <= j, j <= k) {
		(true, true) => "Yes",
		(_, _) => "No",
	};
	println!("{}", ans);
}