using System;

public class erankyun

{

    public static void Main()

    { double a,b,c;

     string s;

     Console.WriteLine("Nermucel erankyan koxmer@");

    p: Console.WriteLine("a=");

     s=Console.ReadLine();

     a=Convert.ToDouble(s);

     Console.WriteLine("b=");

     s=Console.ReadLine();

     b=Convert.ToDouble(s);

     Console.WriteLine("c=");

     s=Console.ReadLine();

     c=Convert.ToDouble(s);

        if(a>b+c || b>a+c || c>a+b)

        { Console.WriteLine("antuylatreli arjeqner,pordzeq nermucel krkin!");

        goto p; }

      else

      { 

          if( a*a==b*b+c*c || b*b==a*a+c*c ||  c*c==a*a+b*b)

          { Console.WriteLine("ays erankyuny uxxankyun erankyun e");}

       else

       if( a*a<b*b+c*c && b*b<a*a+c*c &&  c*c==a*a+b*b)

       { Console.WriteLine("ays erankyuny surankyun  erankyun e");}

        else 

        {Console.WriteLine("ays eranykuny butankyun  erankyun e");}

       }               

      }

    }

​