Еднакви 3 числа

using System;

namespace tESt
{
    class Program
    {
        static void Main(string[] args)
        {


            double numOne = double.Parse(Console.ReadLine());
            double numTwo = double.Parse(Console.ReadLine());
            double numThree = double.Parse(Console.ReadLine());

            if (numOne == numTwo && numTwo == numThree)
            {
                Console.WriteLine("yes");
            }
            else
                Console.WriteLine("no");

        }


    }

}