using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleApplication1
{
    class Book
    {
        public string AuthorName, Genre, Year, AmountPages, Name, Content;
        public Book(string a)
        {
            Name = a;
        }
        public static HomeLibr operator +(Book a, Book b)
        {
            HomeLibr s = new HomeLibr();
            s = s + a;
            s = s + b;
            return s;
        }
    }
    class HomeLibr
    {
        public List<Book> Books = new List<Book>();
        public HomeLibr() { }
        public static HomeLibr operator +(HomeLibr a, Book b)
        {
            a.Books.Add(b);
            return a;
        }
        public static HomeLibr operator -(HomeLibr a, Book b)
        {
            foreach (Book z in a.Books)
            {
                if (z == b)
                {
                    a.Books.Remove(z);
                    return a;
                }
            }
            return a;
        }
        public HomeLibr Search(string s2, ref bool check)
        {
            HomeLibr result = new HomeLibr();
            Regex r = new Regex(@"\w*"+s2+@"\w*");
            foreach (Book k in Books)
            {
                if (r.IsMatch(k.AuthorName) || r.IsMatch(k.Name) || r.IsMatch(k.Genre) || r.IsMatch(k.Year))
                    result.Books.Add(k);
            }
            return result;       
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Book a = new Book("1");
                a.AuthorName = "2";
                a.Genre = "3";
                a.Year = "4";
                a.Name = "5";
                Book b = new Book("2");
                b.AuthorName = "3";
                b.Genre = "4";
                b.Year = "555";
                b.Name = "6";
                Book c = new Book("3");
                c.AuthorName = "4";
                c.Genre = "5";
                c.Year = "6";
                c.Name = "7";
                HomeLibr Libr = new HomeLibr();
                Libr = Libr + a;
                Libr = Libr + b;
                Libr = Libr + c;
                Console.Write("Книги библиотеки №1 - ");
                foreach (Book q in Libr.Books)
                {
                    Console.Write(q.Name + " ");
                }
                Console.WriteLine("\n");
                Libr = Libr - b;
                Console.Write("Книги библиотеки №1 после удаления книги {0} - ", b.Name);
                foreach (Book q in Libr.Books)
                {
                    Console.Write(q.Name + " ");
                }
                Console.WriteLine("\n");
                HomeLibr Libr2 = a + b;
                Console.Write("Книги библиотеки №2, созданной складываем книг {0} и {1}  - ", a.Name, b.Name);
                foreach (Book q in Libr2.Books)
                {
                    Console.Write(q.Name + " ");
                }
                Console.WriteLine("\n");
                bool check = false;
                HomeLibr finding = Libr.Search("2", ref check);
                Console.Write("Результат запроса : книги -  " );
                foreach(Book x in finding.Books)
                { Console.Write(x.Name +" "); }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }



        }
    }
}