using System;

public class Hello
{
    public static void Main()
    {
        var a = int.Parse(Console.ReadLine().Trim());
        var b = int.Parse(Console.ReadLine().Trim());
        var c = int.Parse(Console.ReadLine().Trim());
        var bt = (a + b - 1) / b;
        var ct = (a + c - 1) / c;
        Console.WriteLine(ct * 3 <= bt * 2 ? "YES" : "NO");
    }
}