mediumLinked ListPattern: Hashing
Keyword Book Retrieval System Solution
Problem Statement
Given a linked list of book nodes where each node contains a unique identifier and a set of keywords, design and implement a system to store and retrieve books based on their keywords.
Examples
Example 1:
Input:book1 (ID: 1, Keywords: ["Python", "Programming"])
book2 (ID: 2, Keywords: ["Java", "Programming"])
book3 (ID: 3, Keywords: ["Python", "Data Science"])
Output:[book1, book3]
Explanation: This example demonstrates how to retrieve books with the keyword 'Python'.
Example 2:
Input:book1 (ID: 1, Keywords: ["Python", "Programming"])
book2 (ID: 2, Keywords: ["Java", "Programming"])
book3 (ID: 3, Keywords: ["JavaScript", "Web Development"])
Output:[]
Explanation: This example demonstrates how to retrieve books with multiple keywords.
Constraints
- The linked list may be empty or contain multiple nodes.
- Each book node must have a unique identifier and a set of keywords.
- The system should be able to handle a large number of books and keywords.
- The system should be able to quickly identify books with a specific set of keywords.
Time: O(n + k) Space: O(n + k)
Use a hash table or an index to store the book nodes and a trie or a prefix tree to store the keywords. This approach has a time complexity of O(n) and space complexity of O(m), where n is the number of book nodes and m is the number of keywords.
Run, Test & Submit Code
Ready to practice this challenge? Launch our interactive compilation environment with compiler validation.
Solve on Interactive WorkspaceTested Solutions
No solution code is currently loaded.
Complete this code in the workspace editor.