using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Stack
{
    internal class StackBooksOfArray
    {
        private Book[] arrayBooks = new Book[1000];
        private int lenght = 0;

        public Book pop()
        {
            lenght--;
            return arrayBooks[lenght];
        }

        public void push(Book newBook)
        {
            arrayBooks[lenght] = newBook;
            lenght++;
        }

        public void sort()
        {

        }
    }
}