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

class Program
{
    static void Main(string[] args)
    {
        var input = Console.ReadLine().Split().Select(long.Parse).ToArray();
        var A = input[0];
        var B = input[1];

        if (A < Math.Abs(B)) Console.WriteLine("Yes");
        else Console.WriteLine("No");
    }
}