import java.util.Scanner;
public class Main {
	public static void main(String[]args) {
		Scanner sc = new Scanner(System.in);
		int a,b = 0;
		a = sc.nextInt();
		b = sc.nextInt();
		a++;
		if(a == b) {
			System.out.println("YES");
			a = a - b;
			System.out.println(a);
		}else if(b < a){
			System.out.println("NO");
			a = a - b;
			System.out.println(a);
		}else if(a < b) {
			System.out.println("NO");
			b = b - a;
			System.out.println(b);
		}
	}
}