package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func main() {
	fsc := NewFastScanner()
	a, b := fsc.NextInt(), fsc.NextInt()
	x, y := false, false
	if a < 0 {
		a *= -1
		x = true
	}
	if b < 0 {
		b *= -1
		y = true
	}
	if b%a == 0 {
		res := b / a
		if x {
			res *= -1
		}
		if y {
			res *= -1
		}
		fmt.Println(res)
	} else {
		fmt.Println("NO")
	}
}

//template
type FastScanner struct {
	r   *bufio.Reader
	buf []byte
	p   int
}

func NewFastScanner() *FastScanner {
	rdr := bufio.NewReaderSize(os.Stdin, 1024)
	return &FastScanner{r: rdr}
}
func (s *FastScanner) Next() string {
	s.pre()
	start := s.p
	for ; s.p < len(s.buf); s.p++ {
		if s.buf[s.p] == ' ' {
			break
		}
	}
	result := string(s.buf[start:s.p])
	s.p++
	return result
}
func (s *FastScanner) NextLine() string {
	s.pre()
	start := s.p
	s.p = len(s.buf)
	return string(s.buf[start:])
}
func (s *FastScanner) NextInt() int {
	v, _ := strconv.Atoi(s.Next())
	return v
}
func (s *FastScanner) NextInt64() int64 {
	v, _ := strconv.ParseInt(s.Next(), 10, 64)
	return v
}

func (s *FastScanner) pre() {
	if s.p >= len(s.buf) {
		s.readLine()
		s.p = 0
	}
}
func (s *FastScanner) readLine() {
	s.buf = make([]byte, 0)
	for {
		l, p, e := s.r.ReadLine()
		if e != nil {
			panic(e)
		}
		s.buf = append(s.buf, l...)
		if !p {
			break
		}
	}
}

//Max,Min
func IntMax(a, b int) int {
	if a < b {
		return b
	}
	return a
}

func Int64Max(a, b int64) int64 {
	if a < b {
		return b
	}
	return a
}
func Float64Max(a, b float64) float64 {
	if a < b {
		return b
	}
	return a
}

func IntMin(a, b int) int {
	if a > b {
		return b
	}
	return a
}

func Int64Min(a, b int64) int64 {
	if a > b {
		return b
	}
	return a
}
func Float64Min(a, b float64) float64 {
	if a > b {
		return b
	}
	return a
}

//Gcd
func IntGcd(a, b int) int {
	if a < b {
		b, a = a, b
	}
	if b == 0 {
		return a
	}
	return IntGcd(b, a%b)
}
func Int64Gcd(a, b int64) int64 {
	if a < b {
		b, a = a, b
	}
	if b == 0 {
		return a
	}
	return Int64Gcd(b, a%b)
}