package main

import "fmt"

func main() {
	var A, B int
	fmt.Scan(&A, &B)

	var N int
	var count int = 1
	if A*B > 0 {
		fmt.Println("-1")
	} else {
		for {
			N = A*N + B
			fmt.Println(N)
			if N == 0 {
				fmt.Println(count)
				break
			} else if count == 100000000 {
				fmt.Println("-1")
				break
			}

			count++
		}
	}
}