package yukicoder;

import java.util.Scanner;

public class Q485 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt();
		int B = sc.nextInt();
		int sig = (int) Math.signum(A * B);
		A = Math.abs(A);
		B = Math.abs(B);
		for (int i = 0; i < 1000; ++i) {
			if (A * i == B) {
				System.out.println(i*sig);
				return;
			}
		}
		System.out.println("NO");
	}
}