3EqualNumbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _3_Equal_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {

            var a = double.Parse(Console.ReadLine());
            var b = double.Parse(Console.ReadLine());
            var c = double.Parse(Console.ReadLine());

            if (a == b && b == c)
            {
                Console.WriteLine("yes");
            }

            else
            {
                Console.WriteLine("no");
            }

        }
    }
}



/*
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _3_Equal_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {

            var a = double.Parse(Console.ReadLine());
            var b = double.Parse(Console.ReadLine());
            var c = double.Parse(Console.ReadLine());

            if (a == b)
            {
                if (b == c)
                {
                    if (c == a)
                    {
                        if (b == a)
                        {
                            if (c == b)
                            {
                                if (a == c)


                                                Console.WriteLine("yes");

                                        }
                                    }

                    }
                }
            }
            else {
                Console.WriteLine("no");
            }
        }
    }
}
*/