using System;
using System.Linq;

class Program
{
    public void Solve()
    {
        int[] AB = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
        Console.WriteLine(AB[0] < AB[1] ? "YES" : "NO");
        Console.WriteLine(Math.Abs(AB[0] + 1 - AB[1]));
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}