import java.util.Random;

public class no780 {
    public static void main(String[] args) {
       Random random = new Random();
       final int A = random.nextInt(10000) + 1;
       final int B = random.nextInt(10000) + 1;
       final int YASUO = A + 1;

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

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