EqualNumbers - Chapter 3.0

//Task 015, Chapter 3.0
using System;

public class EqualNumbers
{
    static void Main()
    {
        int firstNumber = int.Parse(Console.ReadLine());
        int secondNumber = int.Parse(Console.ReadLine());
        int thirdNumber = int.Parse(Console.ReadLine());

        if(firstNumber == secondNumber && secondNumber == thirdNumber)
        {
            Console.WriteLine("yes");
        }
        else
        {
            Console.WriteLine("no");
        }
    }
}