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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int na = int.Parse(Console.ReadLine());
            int nb = int.Parse(Console.ReadLine());
            int nc = int.Parse(Console.ReadLine());
            int nx = (na - 1) / nb + 1;
            int ny = (na - 1) / nc + 1;
            Console.WriteLine(nx * 2 >= ny * 3 ? "YES" : "NO");
            Console.ReadLine();
        }
    }
}