using System;

public class Program

{

    public static void Main()

    {

        String name, last;

        int age;

        String user, user2;

        Console.WriteLine("HI! welcome to the safari app");

        Console.WriteLine();

        Console.WriteLine("Whats your name?"); //Put your name with capital letters, but you can put it like you want

        name= Console.ReadLine();

        Console.WriteLine("Whats your last name?"); // the same wih your last name, but you can put it like you want

        last= Console.ReadLine();

        Console.WriteLine("Hi " + name +(" ") + last );

        Console.WriteLine();

        Console.WriteLine("whats your age?");// try to put diferent ages bigger or less than 18

        age= int.Parse(Console.ReadLine());

        if ( age > 18)

        {

        Console.WriteLine("Lets do your username :D");

            Console.WriteLine();Console.WriteLine("Please, write a username, with this name, other people can know who are you");// put your name

        user= Console.ReadLine();

                  if ( user == name )

                      {

                        Console.WriteLine("Please, write another username, you cant use your name");

                          user2= Console.ReadLine();

                        Console.WriteLine("Welcome " + user2 + "!"); 

                      }

                 else 

                      {

                        Console.WriteLine("Welcome " + user + "!");

                      }

        }

        else if( age < 18)

        {

            Console.WriteLine("Sorry, you must have more than 18 years, to create an acount in here :(");

        }

    }

}