import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt() + 1;
        int b = sc.nextInt();
        if( b-a >= 0) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
        System.out.println(Math.abs(a-b));
    }
}