package main

import . "fmt"

func main() {
	var x, y int64
	Scan(&x,&y)
	if x==0&&y==0 {
		Println("YES")
		return
	}
	d := []int64{-1,2,1,-2,1,2,-1,-2,-1}
	for i := range d[1:] {
		for j := range d[1:] {
			if d[i]+d[j]==x && d[i+1]+d[j+1]==y {
				Println("YES")
				return
			}
			for k := range d[1:] {
				a := d[i]+d[j]+d[k]
				b := d[i+1]+d[j+1]+d[k+1]
				if a == x && b == y {
					Println("YES")
					return
				}
			}
		}
	}
	Println("NO")
}