import java.util.Scanner;

public class Yukicoder486 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        
        if ((b * 10 / a) % 10 == 0) {
            System.out.println(b / a);
        } else {
            System.out.println("NO");
        }
    }
}