using System;

namespace test1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split(' ');
            int nokori;
            int b = int.Parse(str[0]) + 1;
            int g = int.Parse(str[1]);
            nokori = g - b;
            if (nokori > -1)
            {
                Console.WriteLine("YES");
                Console.WriteLine(nokori);
            }
            else
            {
                Console.WriteLine("NO");
                Console.WriteLine(nokori * -1);
            }
        }
    }
}