using System;

public class Program

{

    public static void Main()

    {

        Details()

    }

    static bool Details(string Name, string Surname, int Age )

    {

        Console.Write("Name: ");

        Name = Console.ReadLine();

        Console.Write("Surname: ");

        Surname = Console.ReadLine();

        Console.Write("Age: ");

        bool isValidage = int.TryParse(Console.ReadLine(), out Age);

        if(isValidage)

        {

            return isValidage;

        }

        else

        {

            Console.WriteLine("Invalid Number.");

            return isValidage;

        }

    }

}