import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int i = sc.nextInt();
		int j = sc.nextInt();
		int k = sc.nextInt();
		
		if (i <= j && i <= k) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		
		sc.close();
	}
}