Flatten a Multilevel Doubly Linked List | LeetCode 430 | C++, Java, Python

*** CORRECTION: C++: line 25 should be, curr = _tail; Java: line 24 should be, curr = _tail; Python3: Line 28, curr = _tail In video it has been shown as curr = tail; In this case it will be slow, since older tail is pointing to curr. So, lots of repeated traversals. ********* LeetCode Solutions:    • LeetCode Solutions | Leetcode Questions   June LeetCoding Challenge:    • Playlist   May LeetCoding Challenge:    • Playlist   Github Link: https://github.com/KnowledgeCenterYou... *** Best Books For Data Structures & Algorithms for Interviews:********* 1. Cracking the Coding Interview: https://amzn.to/2WeO3eO 2. Cracking the Coding Interview Paperback: https://amzn.to/3aSSe3Q 3. Coding Interview Questions - Narasimha Karumanchi: https://amzn.to/3cYqjkV 4. Data Structures and Algorithms Made Easy - N. Karumanchi: https://amzn.to/2U8FrDt 5. Data Structures & Algorithms made Easy in Java - N. Karumanchi: https://amzn.to/2U0qZgY 6. Introduction to Algorithms - CLR - Cormen, Leiserson, Rivest: https://amzn.to/2Wdp8rZ ***************************************************************************** July LeetCoding Challenge | Problem 10 | Flatten a Multilevel Doubly Linked List | 10 July, Facebook Coding Interview question, google coding interview question, leetcode, Flatten a Multilevel Doubly Linked List, Flatten a Multilevel Doubly Linked List c++, Flatten a Multilevel Doubly Linked List Java, Flatten a Multilevel Doubly Linked List python, Flatten a Multilevel Doubly Linked List solution, 430. Flatten a Multilevel Doubly Linked List, #CodingInterview #LeetCode #JulyLeetCodingChallenge #Google #Amazon #DoublyLinkedList #FlattenLinkedList