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

class Program
{
    static string InputPattern = "Input5";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("1 2");
            //YES
            //1歩で移動可能である。
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("5 -4");
            //YES
            //ちょうど3歩で移動できる。
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("100 100");
            //NO
            //3歩以内ではたどり着けない。
        }
        else if (InputPattern == "Input4") {
            WillReturn.Add("0 0");
            //YES
            //1歩も動かないで辿りつける。
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    struct JyoutaiDef
    {
        internal int Level;
        internal int CurrX;
        internal int CurrY;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        int[] wkArr = InputList[0].Split(' ').Select(A => int.Parse(A)).ToArray();
        int X = wkArr[0];
        int Y = wkArr[1];

        var VisitedSet = new HashSet<string>();

        var stk = new Stack<JyoutaiDef>();
        JyoutaiDef WillPush;
        WillPush.Level = 0;
        WillPush.CurrX = WillPush.CurrY = 0;
        stk.Push(WillPush);
        VisitedSet.Add(string.Format("({0},{1})", 0, 0));

        while (stk.Count > 0) {
            JyoutaiDef Popped = stk.Pop();

            //クリア処理
            if (Popped.Level == 3) continue;

            Action<int, int> PushSyori = (pNewX, pNewY) =>
            {
                //再訪不可
                string wkStr = string.Format("({0},{1})", pNewX, pNewY);
                if (VisitedSet.Add(wkStr) == false) return;

                WillPush.Level = Popped.Level + 1;
                WillPush.CurrX = pNewX;
                WillPush.CurrY = pNewY;
                stk.Push(WillPush);
            };

            PushSyori(Popped.CurrX - 2, Popped.CurrY - 1);
            PushSyori(Popped.CurrX - 2, Popped.CurrY + 1);
            PushSyori(Popped.CurrX - 1, Popped.CurrY - 2);
            PushSyori(Popped.CurrX - 1, Popped.CurrY + 2);
            PushSyori(Popped.CurrX + 1, Popped.CurrY - 2);
            PushSyori(Popped.CurrX + 1, Popped.CurrY + 2);
            PushSyori(Popped.CurrX + 2, Popped.CurrY - 1);
            PushSyori(Popped.CurrX + 2, Popped.CurrY - 1);
        }
        bool CanVisit = VisitedSet.Contains(string.Format("({0},{1})", X, Y));
        Console.WriteLine(CanVisit ? "YES" : "NO");
    }
}