using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using static System.Math;

namespace SortItems
{
    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());

            var chk = Ceiling(a / c);
            var chk1 = Ceiling(a / b) * 2 / 3;

            Console.WriteLine(chk <= chk1 ? "YES" : "NO");

        }
    }
}