aahneise02

17.04.2021 • 

Computers and Technology

Book information (overriding member methods) Given the base class Book, define a derived class called Encyclopedia. Within the derived Encyclopedia class, define a print_info() method that overrides the Book class' print_info() method by printing not only the title, author, publisher, and publication date, but also the edition and number of volumes. Ex: If the input is: The Hobbit J. R. R. Tolkien George Allen & Unwin 21 September 1937 The Illustrated Encyclopedia of the Universe James W. Guthrie Watson-Guptill 2001 2nd the output is: Book Information: Book Title: The Hobbit Author: J. R. R. Tolkien Publisher: George Allen & Unwin Publication Date: 21 September 1937 Book Information: Book Title: The Illustrated Encyclopedia of the Universe Author: James W. Guthrie Publisher: Watson-Guptill Publication Date: 2001 Edition: 2nd Number of Volumes: 1 main.py Load default templat class Book: def __init__(self, title, author, publisher, publication_date): self.title = title self.author = author self.publisher = publisher self.publication_date = publication_date def print_info(self): print('Book Information:') print(" Book Title:', self.title) print('. Author:', self.author) print('. Publisher:', self.publisher) print('. Publication Date:', self.publication_date) 16 class Encyclopedia(Book): # TODO: Define constructor with attributes: title, author, publisher, publication_date, edition, num_volumes # # TODO: Define a print_info() method that overrides the print_info() in the Book class 21 22 23 24 25 if __name__ == "__main__": title = input author = input() publisher = input() publication_date = input() 26 e_title = input() e_author = input() e_publisher = input() e_publication_date = input() edition = input() num yolumes - int rinnut num_volumes = int(input()) 34 35 36 37 38 my_book = Book(title, author, publisher, publication_date) my_book.print_info() 39 my_encyclopedia = Encyclopedia(e_title, e_author, e_publisher, e_publication_date, edition, num_volumes) my_encyclopedia.print_info() 40 41

Ответ:

alexandrecarmene

04.04.2021

Computers and Technology

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answer given in the explanation

Explanation:

We have n clients and k-base stations, say each client has to be connected to a base station that is located at a distance say 'r'. now the base stations doesn't have allocation for more than L clients.

To begin, let us produce a network which consists of edges and vertex

Network (N) = (V,E)

where V = [S, cl-l, - - - -  cl-n, bs-l - - - - - - bs-k, t]

given that cl-l, - - - - - cl-n represents nodes for the clients

also we have that bs-l, - - - - - bs-k represents the nodes for base station

Also

E = [ (s, cl-i), (cl-i,bs-j), (bs-j,t)]

(s, cl-i) = have capacity for all cl-i (clients)

(cl-i,bs-j) = have capacity for all cl-i  clients & bs-j (stations)

⇒ using Fond Fulkorson algorithm we  find the max flow in N

⇒ connecting cl-i clients to  bs-j stations

      like (cl-i, bs-j) = 1

   if f(cl-i, bs-j)  = 0

⇒ say any connection were to produce a valid flow, then

if cl-i (clients) connected                f(s,cl-i) = 1 (o otherwise)

if cl-i (clients) connected  to bs-j(stations)   f(cl-i,bs-j) = 1 (o otherwise)

   f(bs-j,t) = no of clients  (cl-i)  connected to bs-j

⇒ on each node, the max flow value (f) is longer than the no of clients that can be connected.

⇒ create the connection between the client and base station i.e. cl-l to base bs-j iff    f(cl-i, bs-j) = 1

⇒ when considering the capacity, we see that any client cannot directly connect to the base stations, and also the base stations cannot handle more than L clients, that is because the load allocated to the base statsion is L.

from this, we say f is the max no of clients (cl-i) that can be connected if we find the max flow, we can thus connect the client to the base stations easily.

cheers i hope this helps

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