Happy Number (LeetCode 202) | Full solution with with easy explanation | Study Algorithms

Logically and mathematically, there is no definition of a happy number. According to the problem statement, if you keep on adding the square of all digits of a number to reach “1”, the original number will be a happy number. Watch the video to understand how you can get stuck in a loop and how can you break out of it efficiently. All along with visuals, examples and a dry-run of code in JAVA.

Actual problem on LeetCode: https://leetcode.com/problems/happy-n...

Chapters:
00:00 - Intro
00:38 - Problem statement and description
03:33 - How to approach the problem?
05:03 - Solving for efficiency
07:30 - Dry-run of Code
10:31 - Final Thoughts

📚 Links to topics I talk about in the video:
Brute Force Method:    • Brute Force algorithms with real life...  
Recursion Algorithmic Paradigm:    • Recursion paradigms with real life ex...  
Playlist on Algorithmic Paradigms:    • Algorithmic Paradigms  

📘 A text based explanation is available at: https://studyalgorithms.com

Code on Github: https://github.com/nikoo28/java-solut...
Test-cases on Github: https://github.com/nikoo28/java-solut...

📖 Reference Books:
Starting Learn to Code: https://amzn.to/36pU0JO
Favorite book to understand algorithms: https://amzn.to/39w3YLS
Favorite book for data structures: https://amzn.to/3oAVBTk
Get started for interview preparation: https://amzn.to/39ysbkJ

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