using System;
using System.ComponentModel.Design;
using System.Globalization;
using System.Reflection;
using System.Security.Cryptography;

namespace SomeExcercises
{
    class Program
    {
        static void Main(string[] args)
        {
            int randomNumber = int.Parse(Console.ReadLine());

            if (randomNumber <= -1 || randomNumber >= 1)
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }

        }

    }
}