The Library Problem

Problem Preview

"Sam has been appointed as the new Librarian in a library. He needs to perform the following operations on the N books arranged in the bookshelves to get a unique combination of books: - He must select a K-length contiguous sequence of books from the bookshelf. - He must then remove the books that were chosen. - Then he needs to merge the remaining books and determine whether the resulting sequence is unique. - He has to repeat this operation for all possible contiguous segments of books from the N books on the bookshelf. Given an array A which represents the N books in the bookshelves, your task is to help Sam find and return an integer value representing all the possible unique combinations of books that can be generated."