import java.util.Scanner;
public class No159 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		double p =s.nextDouble() , q = s.nextDouble();
		s.close();

		if(1 < p * (2 - q)){
			System.out.println("YES");
		}else{
			System.out.println("NO");
		}

	}

}