using System;

class Program
{
    static void Main()
    {
        double a = double.Parse(Console.ReadLine());
        double b = double.Parse(Console.ReadLine());
        double c = double.Parse(Console.ReadLine());

        double j = Math.Ceiling(a / b);
        double k = Math.Ceiling(a / c);

        if (j * 2 >= k * 3) Console.WriteLine("YES");
        else Console.WriteLine("NO");
    }
}