using System.Collections.Generic;
using System.Linq;
using System;

public class P
{
    public int x { get; set; }
    public int y { get; set; }
    public int times { get; set; }
    public bool used    { get; set; }
}

public class Hello
{
    public static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var x = int.Parse(line[0]);
        var y = int.Parse(line[1]);
        Console.WriteLine(getAns(x,y) ? "YES":"NO");
    }
    public static bool getAns ( int x , int y)
    {
        var dx = new int[] { 1, 2, 2, 1, -1, -2, -2, -1 };
        var dy = new int[] { 2, 1, -1, -2, -2, -1, 1, 2 };
        var q = new Queue<P>();
        for (int i = 0; i < 8; i++) q.Enqueue(new P { x = dx[i], y = dy[i] ,times = 1});
        while (true)
        {
            var w = q.Peek();
            if (w.times == 1 && w.used) { q.Enqueue(q.Dequeue()); goto next; }
            else if (w.times == 2 && w.used) { q.Enqueue(q.Dequeue()); goto next; }
            else if (w.times == 3) break;
            w = q.Dequeue();
            for (int i = 0; i < 8; i++)
                q.Enqueue(new P { x = w.x +    dx[i], y =  w.y +  dy[i], times = w.times + 1 });
            next:;
        }
        while (q.Count()> 0)
        {
            var w = q.Dequeue();
            if (w.x == x && w.y == y) return true;
        }
        return false;
    }
}