using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Carlos Ivan Lopez Aldava");

        string username, password;

        int ctr = 0,dd=0;

       Console.Write("\n\nCheck username and password :\n");

       Console.Write("N.B. : Defaule username and password is : username and password\n");

       Console.Write("---------------------------------\n"); 

do

{

Console.Write("Input a username: ");

username = Console.ReadLine();

Console.Write("Input a password: ");

password = Console.ReadLine();

if( username == "username" && password == "password" )

{

    dd=1;

    ctr=3;

}

​

else

{

    dd=0;

    ctr++;

}

}

while (( username != "username" || password != "password" )

        && (ctr != 3));

        if (dd == 0)

        {

            Console.Write("\nLogin attemp more than three times. Try later!\n\n");

        }

        else  

        if(dd==1)

        {

            Console.Write("\nPassword entered successfull!\n\n");   }

    }

}