import java.util.*;
import java.lang.Math;

class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int A = sc.nextInt();
        int B = sc.nextInt();
        int p = A - B;
        if(p <= 0){
            System.out.println("Yes");
            System.out.println("0");
        }else{
            System.out.println("No");
            System.out.println(p);
        }
	}
}