using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            double a = int.Parse(Console.ReadLine());
            double b = int.Parse(Console.ReadLine());
            double c = int.Parse(Console.ReadLine());

            Console.WriteLine(((a / b) * (2d / 3d) >= (a / c)) ? "YES" : "NO");
        }
    }
}