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

namespace yukicoder
{
    class yc
    {
        static void Main()
        {
            int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());
            double d = (double)a / b;
            double f = (double)a / c;
            int e,g;

            if (a / b < d)
                e = (int)d + 1;
            else
                e = (int)d;

            if (a / c < f)
                g = (int)f + 1;
            else
                g = (int)f;

            if (e * 2 / 3 >= g)
                Console.WriteLine("YES");
            else
                Console.WriteLine("NO");
        }
    }
}