import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long A = sc.nextLong();
        long B = sc.nextLong();
        if(A == 0){
            System.out.println(B);   
        }else if(B == 0){
            System.out.println(0);   
        }else if(Math.abs(B) % (Math.abs(A)-1) == 0){
            if(A < 0){
                A = -A;
                B = -B;
            }
            System.out.println(-B/(A-1));
        }else{
            System.out.println(0);
        }
    }
}