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

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