import java.util.Scanner;

public class No218 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		double a = sc.nextDouble();
		double b = sc.nextDouble();
		double c = sc.nextDouble();
		
		int t1 = (int)Math.ceil(a/b);
		int t2 = (int)Math.ceil(a/c);

		if((t1*2) >= (t2*3)){
			System.out.println("Yes");
		}else
			System.out.println("No");
	}

}