using System;
public class Hello{
    public static void Main(){
        
        var nums = Console.ReadLine().Split();
        int m = int.Parse(nums[0]) + 1;
        int f = int.Parse(nums[1]);
        
        if(m<=f)
            Console.WriteLine("YES");
        else
            Console.WriteLine("NO");

        Console.WriteLine(Math.Abs(m-f));    
    }
}