Add Lago

Author: yangshun

algorithms/README.md

@@ -5,6 +5,8 @@ This section dives deep into practical tips for specific topics of algorithms an
 
 For each topic, study links are recommended to help you master the topic. There is a list of recommended common questions to practice which in my opinion is highly valuable for mastering the core concepts for the topic.
 
+If you are interested in how data structures are implemented, check out [Lago](https://github.com/yangshun/lago), an Data Structures and Algorithms library for JavaScript. It is pretty much still WIP but I intend to make it into a library that is able to be used in production and also a reference resource for learning Data Structures and Algorithms.
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 ## Contents
 
 - [Array](array.md)

preparing/README.md

@@ -21,6 +21,8 @@ This [interviews repository](https://github.com/kdn251/interviews) by Kevin Naug
 
 The Medium publication [basecs](https://medium.com/basecs) by [Vaidehi Joshi](https://medium.com/@vaidehijoshi) is also a great and light-hearted resource to recap on the various data structures and algorithms.
 
+If you are interested in how data structures are implemented, check out [Lago](https://github.com/yangshun/lago), an Data Structures and Algorithms library for JavaScript. It is pretty much still WIP but I intend to make it into a library that is able to be used in production and also a reference resource for learning Data Structures and Algorithms.
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 ### Mastery through Practice
 
 Next, gain familiarity and mastery of the algorithms and data structures in your chosen programming language: