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

namespace No240
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			var line = Console.ReadLine ().Split(' ').Select(value=>Convert.ToInt64(value)).ToArray();
			var x = line [0];
			var y = line [1];

			HashSet<Tuple<long,long>> visited = new HashSet<Tuple<long, long>> ();
			visited.Add (new Tuple<long, long>(0, 0));

			var steps = new [] 
			{
				new Tuple<long,long> (2, 1),
				new Tuple<long,long> (2, -1),
				new Tuple<long,long> (-2, 1),
				new Tuple<long,long> (-2, -1),
				new Tuple<long,long> (1, 2),
				new Tuple<long,long> (1, -2),
				new Tuple<long,long> (-1, 2),
				new Tuple<long,long> (-1, -2),
			};
			for (int i = 0; i < 3; i++) {
				HashSet<Tuple<long,long>> nextPositions = new HashSet<Tuple<long,long>> (visited);
				foreach (var element in visited) {
					foreach (var step in steps) {
						var next = new Tuple<long,long> (element.Item1 + step.Item1, element.Item2 + step.Item2);
						if (!nextPositions.Contains (next)) {
							nextPositions.Add (next);
						}
					}
				}
				visited = nextPositions;
			}

			if (visited.Contains (new Tuple<long,long> (x, y))) {
				Console.WriteLine ("YES");
				return;
			}
			Console.WriteLine ("NO");
		}
	}
}