import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        a++;
        if(a<=b){
            System.out.println("Yes");
            System.out.println(b-a);
        }else{
            System.out.println("No");
            System.out.println(a-b);
        }
    }
}