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

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());
            int x = (a - 1) / b + 1;
            int y = (a - 1) / c + 1;
            Console.WriteLine(x * 2 >= y * 3 ? "YES" : "NO");
        }
    }
}