A very popular and famous interview question. In this problem you are given a single Linked List which needs to be reversed such that the last element becomes the first element of the list. You can have several ways to approach this problem. One way could be to create an entirely new list in a reversed order or we can take advantage of the node addresses to manipulate. This video shows you animations which will help you to understand the concept behind it. Along with it, we also write the code.
Chapters:
00:00 - Intro
01:11 - Problem statement and description
02:01 - Method 1: Creating a new reversed list (using stacks)
03:59 - Code using stacks
06:59 - Method 2: Efficient solution by manipulating next nodes
08:41 - Dry-run of Code
13:25 - Final Thoughts
Actual problem on HackerRank: www.hackerrank.com/challenges...
📚 Links to topics I talk about in the video:
Stack Data Structure: • Stack Data Structure e...
Linked Lists: • Linked List Data Struc...
📘 A text based explanation is available at:
Code on Github: github.com/nikoo28/java-solut...
Test-cases on Github: github.com/nikoo28/java-solut...
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Starting Learn to Code: amzn.to/36pU0JO
Favorite book to understand algorithms: amzn.to/39w3YLS
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