Bidirectional Association

Medium Composition & Aggregation PRO

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Problem Statement

Create `Author` and `Book` classes. When `Author.write(book)` is called, it should set `self.book = book` AND `book.author = self`. Print ‘[Author] wrote [Book]’ and then on a new line ‘[Book] written by [Author]’ by accessing the properties backwards from the Book object.

Input Format

Two lines: Author name then Book title.

Output Format

Print the bidirectional link messages on two lines.

Constraints

None

Sample Input

Tolkien
Hobbit

Sample Output

Tolkien wrote Hobbit
Hobbit written by Tolkien

Explanation

In a bidirectional association, both objects maintain a reference to each other, allowing traversal in either direction.

Starter Code

class Book:
    pass

class Author:
    pass

if __name__ == '__main__':
    auth = input().strip()
    title = input().strip()
    # Establish bidirectional link and print
    pass

Limits

Time Limit: 1s
Memory Limit: 256MB

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