package main

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

type Point struct {
	x, y int
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Scan(); x, _ := strconv.Atoi(sc.Text())
	sc.Scan(); y, _ := strconv.Atoi(sc.Text())

	offsets := []Point{
		Point{-2, -1},
		Point{-2, +1},
		Point{-1, -2},
		Point{-1, +2},
		Point{+1, -2},
		Point{+1, +2},
		Point{+2, -1},
		Point{+2, +1},
	}

	visited := make(map[Point]bool)
	visited[Point{0, 0}] = true

	for i := 0; i < 3; i++ {
		points_to := make(map[Point]bool)
		for point, _ := range visited {
			for _, offset := range offsets {
				point_to := Point{point.x + offset.x, point.y + offset.y}
				if (!visited[point_to]) {
					points_to[point_to] = true
				}
			}
		}

		for point_to, _ := range points_to {
			visited[point_to] = true
		}
	}

	if visited[Point{x, y}] {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}
}