6

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

namespace ExamPreparation
{
    public sealed class Book
    {
        public Book(string title, DateTime releaseDate)
        {
            this.Title = title;
            this.ReleaseDate = releaseDate;
        }

        public string Title { get; private set; }

        public DateTime ReleaseDate { get; set; }

        public override string ToString()
        {
            return $"{this.Title} -> {this.ReleaseDate.ToString("dd.MM.yyyy")}";
        }
    }

    public sealed class Library
    {
        public Library()
        {
            this.Books = new List<Book>();
        }

        public List<Book> Books { get; set; }

        public string ReleasedBooks(DateTime endDate)
        {
            StringBuilder output = new StringBuilder();
            IEnumerable<Book> releasedAfter = this.Books.Where(b => b.ReleaseDate > endDate);

            foreach (var book in releasedAfter.OrderBy(b => b.ReleaseDate).ThenBy(b => b.Title))
            {
                output.AppendLine(book.ToString());
            }

            return output.ToString().Trim();
        }
    }

    public sealed class Startup
    {
        public static void Main()
        {
            int n = int.Parse(Console.ReadLine());
            Library library = new Library();

            for (int i = 0; i < n; i++)
            {
                string[] tokens = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                string title = tokens[0];
                DateTime releaseDate = DateTime.ParseExact(tokens[3], "dd.MM.yyyy", CultureInfo.InvariantCulture);

                Book book = new Book(title, releaseDate);

                if (library.Books.Contains(book))
                {
                    library.Books.Find(b => b.Title == title).ReleaseDate = releaseDate;
                }
                else
                {
                    library.Books.Add(book);
                }
            }

            DateTime endDate = DateTime.ParseExact(Console.ReadLine(), "dd.MM.yyyy", CultureInfo.InvariantCulture);
            string releasedBooks = library.ReleasedBooks(endDate);
            Console.WriteLine(releasedBooks);
        }
    }
}