using System;

class Program
{
    static void Main()
    {
        var s = Console.ReadLine().Split();
        int x = int.Parse(s[0]);
        int y = int.Parse(s[1]);


        for (int i = 0; i <= 3; i++)
        {
            if (dfs(i, x, y))
            {
                Console.WriteLine("YES");
                return;
            }
        }
        Console.WriteLine("NO");
    }

    static bool dfs(int a,int b,int c)
    {
        if (a == 0)
        {
            if (b == 0 && c == 0) return true;
            else return false;
        }

        int[] dx = { -2, -2, -1, -1, 1, 1, 2, 2 };
        int[] dy = { -1, 1, -2, 2, -2, 2, -1, 1 };

        for(int i = 0; i < 8; i++)
        {
            int nx = b + dx[i];
            int ny = c + dy[i];
            if (dfs(a - 1, nx, ny))
                return true;
        }
        return false;
    }
}