import java.util.Scanner;

public class no780 {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in); 
       final int A = sc.nextInt();
       final int B = sc.nextInt();
       final int YASUO = A + 1;

       if (YASUO <= B) {
           System.out.println("YES");
       } else {
           System.out.println("NO");
       }

       System.out.println("" + Math.abs(YASUO - B));
    }
}