using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        var lst = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToList();
        var a = lst[0] + 1; var b = lst[1];

        Console.WriteLine("{0}", (a <= b) ? "YES" : "NO");
        Console.WriteLine("{0}", (a <= b) ? (b - a) : (a - b));

        return;
    }
}