import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        if (a < b) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
        System.out.println(Math.abs(a - b + 1));

        sc.close();

    }
}