using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("please enter your name");

        string name = Console.ReadLine();

        String [] Names = { "Menna" , "Mohamed" , "yehia" } ;

        for ( int i=0; i<Names.Length;i++)  {

            if ( name == Names[i] ) {

                Console.WriteLine("Welcome" + name );

            }

            else 

            {

                Console.WriteLine("failed");

            }

            Console.WriteLine("please enter your email");

            string email =  Console.ReadLine();

            int at = email.IndexOf("@");

            int dot = email.IndexOf(".");

            if ( at>0 && dot >0 && dot>at )

            {

            }

            if (email.EndsWith("@yahoo.com") || email.EndsWith("@gmail.com"))

            {

                Console.WriteLine("sucessed");

            }

            else

            {

                Console.WriteLine("Failed");

            }

    }

    }

}

​