import java.util.Scanner;

public class SimpleComparator {
    public static boolean CheckInt(int a, int b, int c) {
        return a <= b && b <= c;
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        if(CheckInt(sc.nextInt(),sc.nextInt(),sc.nextInt())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}