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Aditya Chatterjee

Independent Researcher and Author

Independent Researcher and Author

Aditya Chatterjee is an Independent Algorithmic Researcher, Software Developer and Technical Author. He is the founding member of OPENGENUS, an organization focused on changing Internet consumption. He has collaborated with over 500 researchers and has mentored over 3000 learners personally across the Globe through the Internship program at OPENGENUS.Read More...

Achievements

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Published Books 24

System Design at Google: Engineering Peak for Interviews

Books by Aditya Chatterjee

Read book preview at: https://www.amazon.com/gp/product/B0BBY5G9QS?asin=B0BBY5G9QS&format=4

This book “System Design at Google” is the only book you need to master System Design for Interviews.

This book is divided into two major sections:

* Knowledge on core Developer Products at Google such as BigQuery, BigTable, Hadoop and Dapper. This gives you practical knowledge.
* Detailed System Desig

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Read book preview at: https://www.amazon.com/gp/product/B0BBY5G9QS?asin=B0BBY5G9QS&format=4

This book “System Design at Google” is the only book you need to master System Design for Interviews.

This book is divided into two major sections:

* Knowledge on core Developer Products at Google such as BigQuery, BigTable, Hadoop and Dapper. This gives you practical knowledge.
* Detailed System Design of Google Products with over 1B active users such as YouTube, Google Search and Google Maps.

This book will accelerate your understanding of System Design and help you:

* Prepare for System Design Interviews
* Work on System Design of highly scalable systems with over 1B active users.

* Get familiar with the state-of-the-art Developer tools and System Designs.

* Do back of the envelope calculations to estimate memory requirements.

* Do interesting calculations for estimating attributes/ cost of real production systems

Get started with this book and change the equation of your career.

Book: System Design at Google

Authors (6): Aditya Chatterjee, Ue Kiao, Chew Chee Keng, Harshita Singh, Kirti Singh, Adelaide Guidotti

Publisher: © OpenGenus

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Binary Search Problems

Books by Aditya Chatterjee

Did you know that you can calculate Square Root of a number using Binary Search?

This book will change your Algorithmic Problem-Solving skills forever. Read it now to level up your future.

This book “Binary Search Problems” is the only book you need to master. The focus is towards core problems for Coding Interviews. Many think that Binary Search is a simple search algorithm for sorted values to find target is O(logN). It is true bu

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Did you know that you can calculate Square Root of a number using Binary Search?

This book will change your Algorithmic Problem-Solving skills forever. Read it now to level up your future.

This book “Binary Search Problems” is the only book you need to master. The focus is towards core problems for Coding Interviews. Many think that Binary Search is a simple search algorithm for sorted values to find target is O(logN). It is true but the applicability of Binary Search is much larger.

It does not stop here. There is a wide variety of problems which can be solved using Binary Search efficiently even though it may not seem so from the problem statements.

These are hot Interview Questions as it tests the core understanding of the candidate very well.
This book has covered most important problems with detailed explanation along with sample implementations.

This book is divided into 3 parts:Fundamentals of Binary Search
Core Binary Search Techniques
Practice Problems on Binary Search

You should go through the implementations irrespective of the Programming Language you use as the ideas remain the same. Improving Implementation skills is important for Coding Interviews and this book will help you achieve it.

If you have time, you should read one chapter every day and think about the problem on your own. Try to find different variants.
These carefully selected problems will help you level up your skills and help secure a good job or internship soon.

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Data Science Interview Questions and Answers

Books by Aditya Chatterjee

This book “Data Science Interview Questions and Answers” is the only book you need to master Data Science for Interviews.

This book has over 100 interview questions that are frequently asked in Data Science Interviews at top companies.
The field is vast and Industry takes a different approach. The questions are tailored specific to the Industry Interviews which tests your theoretical knowledge of the field relevant for practical

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This book “Data Science Interview Questions and Answers” is the only book you need to master Data Science for Interviews.

This book has over 100 interview questions that are frequently asked in Data Science Interviews at top companies.
The field is vast and Industry takes a different approach. The questions are tailored specific to the Industry Interviews which tests your theoretical knowledge of the field relevant for practical work.

Questions in this book is divided into different sections:Multiple Choice Questions (MCQs): Asked in written and online screening tests.
Descriptive Questions: Asked in one-on-one Interviews.Basic Questions
Analytical Questions
Advanced Interview Questions: Asked if you are interviewing for a senior role.
Python Questions: Asked to test your practical implementation experience.

Each question is followed by the detailed answer so you will get prepared along the way.

Get started with this book and change the equation of your career.

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System Design of YouTube: With cost estimation of hosting

Books by Aditya Chatterjee

This book “System Design of YouTube: With cost estimation of hosting” walks you through the requirements of building a scalable video hosting platform that is used by over 1B users worldwide. This book is unique in its second section where we do detailed calculations to estimate the minimum cost to host YouTube using various approaches.

Estimating and doing such calculations is a critical underrated skill to designing production syst

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This book “System Design of YouTube: With cost estimation of hosting” walks you through the requirements of building a scalable video hosting platform that is used by over 1B users worldwide. This book is unique in its second section where we do detailed calculations to estimate the minimum cost to host YouTube using various approaches.

Estimating and doing such calculations is a critical underrated skill to designing production system.

This book will accelerate your understanding of System Design and help you:Prepare for System Design Interviews
Do interesting calculations for estimating attributes/ cost of real production systems

Read this book to level up your System Design skills.

Book: System Design of YouTube: With cost estimation of hosting
Authors (3): Aditya Chatterjee, Adelaide Guidotti, Ue Kiao
Publisher: OpenGenus
Number of Pages: 55

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Decrease and Conquer Algorithms

Books by Aditya Chatterjee

This book will change your Algorithmic Problem-Solving skills forever. On mastering this book, you will be closer to become a National Programmer.

This book “Decrease and Conquer Algorithms” is the only book you need to master the algorithmic technique of Decrease and Conquer. The focus is towards core problems for Coding Interviews.
Very few programmers ever heard about “Decrease and Conquer” technique. This book wil

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This book will change your Algorithmic Problem-Solving skills forever. On mastering this book, you will be closer to become a National Programmer.

This book “Decrease and Conquer Algorithms” is the only book you need to master the algorithmic technique of Decrease and Conquer. The focus is towards core problems for Coding Interviews.
Very few programmers ever heard about “Decrease and Conquer” technique. This book will help you take a step closer to becoming a National Programmer.

Note: This is different from "Divide and Conquer" and is a much stronger algorithmic technique.

This book explains the technique in depth by introducing three variants of it. For each variant, the book presents the core idea followed by several algorithmic problems using the technique. This will help you see standard algorithms like search algorithm and challenging problems like Fake Coin Problem with a new view.

You should go through the implementations irrespective of the Programming Language you use as the ideas remain the same. Improving Implementation skills is important for Coding Interviews and this book will help you achieve it.

This book is a must if you are preparing for Coding Interviews at top Software Companies and for Competitive Programming Contests like Google Code Jam, ICPC, Facebook Hacker Cup, International Olympiad in Informatics (IOI), United States of America Computing Olympiad (USACO), Indian Computing Olympiad (ICO) and much more.

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Master C Programming with Practical Projects

Books by Aditya Chatterjee

This is the only book you need to master C Programming Language practically.

There is no use if you know a Programming Language but struggle to implement tools. This is a problem with majority of programmers today. This book is specially designed to help you master C as your first programming language and learn it in a practical approach by:

• Learn the core fundamentals of C Programming Language.
• Implement major projects in C f

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This is the only book you need to master C Programming Language practically.

There is no use if you know a Programming Language but struggle to implement tools. This is a problem with majority of programmers today. This book is specially designed to help you master C as your first programming language and learn it in a practical approach by:

• Learn the core fundamentals of C Programming Language.
• Implement major projects in C from scratch.

This book is designed in a form of a bootcamp. It is split into 6 weeks and chapters for 5 days a week.
Each week:

• 2 days a week is kept off so that you can relax and revise the previous topics of that week. Expertise takes time and these 2 days a week serve this purpose.
• 5th day of every week is kept for practical only. We implement C programs on this day which are of increasing complexity as we process through the weeks.
• The 6th week focusses only on Practical projects.

As this is a big book, you should follow the schedule strictly to complete it in 6 weeks.

There are over 200 C programs in this book with over 10 major projects implemented in C. The projects help you strengthen your portfolio as a Software Developer as well. Some of the projects are:

• Stopwatch
• Dictionary
• Spell Checker
• Calendar

and much more.

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50+ Linux Commands before joining a Company

Books by Aditya Chatterjee

This book "50+ Linux Commands before joining a Company" will prepare you to use Linux in a way a professional developer would use. You can fit in any developer group instantly and will feel confident in using your computing system.

Moreover, when one is developing a software system that will be used by customers, it is important to test in different Linux variants and the key is to use Linux smoothly for wide collaboration. We have covered over

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This book "50+ Linux Commands before joining a Company" will prepare you to use Linux in a way a professional developer would use. You can fit in any developer group instantly and will feel confident in using your computing system.

Moreover, when one is developing a software system that will be used by customers, it is important to test in different Linux variants and the key is to use Linux smoothly for wide collaboration. We have covered over 50 commands, and this will enable you to use Linux efficiently for any basic development work.

All commands are important and has been chosen by analyzing the development work done in top companies. High level ideas we have covered are:

• Get hardware details about your system
• Get software details about your system
• Running and handling processes efficiently and in background
• Handling file system
• Other key commands

At the end, we have present key advices of using Linux that will make you a “great developer” clearly.

Few of the key commands we have covered are: screen, dmidecode, ps, ls, vi, lscpu, uname, jobs and much more. We start by capturing the details of the current computing system. This is important so that you can share the details along with the main work (may be an application or benchmark data) so it is reproducible.

Read this book now and get prepared to work in any professional developer group.

Book: 50+ Linux Commands before joining a Company
Authors: Aditya Chatterjee, Benjamin QoChuk
Publisher: OpenGenus

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Mathematical Dynamic Programming

Books by Aditya Chatterjee

This book will change your Algorithmic Problem-Solving skills forever. Read it now to level up your future.

This book “Mathematical Dynamic Programming” is the only book you need to master Dynamic Programming. The focus is towards core Mathematical problems for Coding Interviews.

Many fail to solve basic DP problems such as Longest Increasing Subsequence and Shortest Common SuperSequence. All such problems are covere

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This book will change your Algorithmic Problem-Solving skills forever. Read it now to level up your future.

This book “Mathematical Dynamic Programming” is the only book you need to master Dynamic Programming. The focus is towards core Mathematical problems for Coding Interviews.

Many fail to solve basic DP problems such as Longest Increasing Subsequence and Shortest Common SuperSequence. All such problems are covered in this book in depth.

This book has covered 24 most important DP problems with detailed explanation along with sample implementations.

You should go through the implementations irrespective of the Programming Language you use as the ideas remain the same. Improving Implementation skills is important for Coding Interviews and this book will help you achieve it.

If you have time, you should read one chapter every day and think about the problem on your own. Try to find different variants.
These carefully selected problems will help you level up your skills and help secure a good job or internship soon.

Get started with this book and change the equation of your career.
Book: Mathematical Dynamic Programming
Authors (3): Aditya Chatterjee, Ue Kiao, Geoffrey Ziskovin

Publisher: © OpenGenus

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Mathematical Algorithms for the day before your coding interview

Books by Aditya Chatterjee

Mathematical Algorithms are fundamentally important as several real-life problems can be modeled as a Mathematical problem. Solving such problems require mathematical insights.

These problems are a fundamental part of Interviews as it illustrates the thinking process of the candidate clearly. By going through the problems in this book, you will be well prepared to tackle any Mathematical problem.

Following are some of the problems we have explo

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Mathematical Algorithms are fundamentally important as several real-life problems can be modeled as a Mathematical problem. Solving such problems require mathematical insights.

These problems are a fundamental part of Interviews as it illustrates the thinking process of the candidate clearly. By going through the problems in this book, you will be well prepared to tackle any Mathematical problem.

Following are some of the problems we have explored which involve ideas to solve a wider range of problems.

• Smallest number with multiples

This is a unique problem where we learn key insights regarding Prime factorization, role of primes in multiples and much more.

• Largest palindrome

In this problem, we have reduced 810000 comparisons to 362 comparisons based on three deep insights. This is a dramatic improvement.

• GCD of sub-parts

This problem brings up key insights involving GCD (a common and important topic) and in the process, we have explored several standard algorithms like Euclidean’ s GCD Algorithm.

• Next Permutation

This problem demonstrates a significant improvement from O(N^N x N x logN) time to O(N) time complexity. Moreover, it illustrates that improving time complexity does not necessarily mean increasing space complexity.

With these problems and the thought process to solve them, you will be fully prepared.

Read this book now and ace your upcoming coding interview. This is a must read for everyone preparing for Coding Interviews at top companies.

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Machine Learning Interview Questions and Answers

Books by Aditya Chatterjee

This book “Machine Learning Interview Questions & Answers” is a must practice book to test your knowledge in the field of Machine Learning.

The field is vast and Industry takes a different approach. The questions are tailored specific to the Industry Interviews which tests your theoretical knowledge of the field relevant for practical work.

This book has over 120 MCQs (Multiple Choice Questions). Each one is provided w

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This book “Machine Learning Interview Questions & Answers” is a must practice book to test your knowledge in the field of Machine Learning.

The field is vast and Industry takes a different approach. The questions are tailored specific to the Industry Interviews which tests your theoretical knowledge of the field relevant for practical work.

This book has over 120 MCQs (Multiple Choice Questions). Each one is provided with the correct answer along with in-depth explanation. So, your revision will be complete as you attempt the problems. This includes core questions from Deep Learning important for ML Interviews as well.

This book covers all core topics through the carefully selected set of Interview Questions:

* Core ML techniques like Classification, Regression, Clustering

* Core ML concepts like Supervised, Unsupervised and Semi-Supervised Learning, Naïve Bayes, Central Limit Theorem, Standardization and much more.

* Deep Learning (DL) concepts relevant for ML Interviews like CNN, RNN, fundamental operations like Fully Connected Layer and much more.

One must go through this book at regular intervals to test their knowledge and identify loopholes in their understanding.

Book: Machine Learning Interview Questions & Answers

Authors (2): Aditya Chatterjee, Geoffrey Ziskovin

Contributors (2): Benjamin QoChuk: Computer Science Researcher, Inventor and Software Developer; Leandro Baruch: IT Project Services Specialist at UNHCR (UN Refugee Agency)

Publisher: © OpenGenus

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Mastering Quick Sort

Books by Aditya Chatterjee

This book “Mastering Quick Sort” is the only book you need to master Quick Sort along with its detailed analysis.

Quick Sort is the most asked topic in Coding Interviews and is equally challenging. This book help you understand all core concepts, in-depth complexity analysis and advanced research direction as well.
Each concept introduced in this book is supported with sample implementations which help you get practical experi

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This book “Mastering Quick Sort” is the only book you need to master Quick Sort along with its detailed analysis.

Quick Sort is the most asked topic in Coding Interviews and is equally challenging. This book help you understand all core concepts, in-depth complexity analysis and advanced research direction as well.
Each concept introduced in this book is supported with sample implementations which help you get practical experience.

We have covered variants of Quick Sort such as:

* 3 way Partitioning Quick Sort
* Dual-Pivot Quick Sort
* Parallel Quick Sort (3 techniques)

We have presented MCQs at the end of the book which help you test your core concepts. This is a MUST READ for Coding Interviews and mastery in the field of Algorithms.

Authors (3): Aditya Chatterjee, Ue Kiao, Geoffrey Ziskovin

About the authors:
* Aditya Chatterjee is an Independent Researcher, Technical Author and the Founding Member of OPENGENUS.
* Ue Kiao is a Japanese Software Developer and has played key role in designing systems like TaoBao, AliPay. She has completed her PhD in CS at TokyoTech.
* Geoffrey Ziskovin is an American Software Engineer with an experience of over 30 years. He has interviewed over 700 candidates worldwide for various Fortune 500 companies.

Contributors (8): Shubhankar Maurya, Vikram Shishupalsingh Bais, Mohd Ehtesham Uddin Qureshi, Shlok Singh, Aravind Mohandas, Tushti, Vansh Pratap Singh, Nico Lomuto

Publisher: © OpenGenus

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Linked List Problems

Books by Aditya Chatterjee

Did you know that the algorithms dealing with L1, L2 and L3 cache in your computer rely on Linked List?

The calculations for Rocket and Satellite launches in NASA use Linked Lists to store numbers and perform critical calculations.

These are just 2 instances of Linked List. It is one of the most used Data Structures and you should definitely master it before you jump into the real world.

This book "Linked List Problems"

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Did you know that the algorithms dealing with L1, L2 and L3 cache in your computer rely on Linked List?

The calculations for Rocket and Satellite launches in NASA use Linked Lists to store numbers and perform critical calculations.

These are just 2 instances of Linked List. It is one of the most used Data Structures and you should definitely master it before you jump into the real world.

This book "Linked List Problems" (For Interviews and Competitive Programming) is a deep dive into Linked List Data Structure, core techniques and Practice problems on Linked List. On completing this book, you will have these core skills:

* Strong hold on Linked List (Research Level)
* Easily solve any Linked List problem in Coding Interview and Competitive Programming Contests
* Design Custom Data Structures for real-life applications

This book is divided into 4 sections:

* Fundamentals of Linked List: This section builds your fundamentals. This burst several misconceptions and assumptions a programmer makes about Linked List.
* Types of Linked Lists: This section builds you hold on twisting Linked List as per your requirements to solve a problem.
* Core Linked List Techniques: This is the most important section which presents you all the tools and techniques you need to conquer Linked Lists.
* Practice Problems on Linked List: Practice is a key to success for Coding Interviews, Competitive Programming and Efficient Problem Solving.

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Java Interview Questions

Books by Aditya Chatterjee

In this book “Java Interview Questions: with detailed answers”, we have presented several Interview Questions in Java (MCQ) covering all important topics in Java. These questions are frequently asked in Coding Interviews and you must attempt these questions. Each question is provided with the detailed answer.

This book is divided into four core sections:

• Basic Java Interview Questions: These are simple questions on bac

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In this book “Java Interview Questions: with detailed answers”, we have presented several Interview Questions in Java (MCQ) covering all important topics in Java. These questions are frequently asked in Coding Interviews and you must attempt these questions. Each question is provided with the detailed answer.

This book is divided into four core sections:

• Basic Java Interview Questions: These are simple questions on background of Java.
• Core Java Interview Questions: These MCQs involve core Java ideas and are frequently asked in Coding Interviews.
• Predict the Output Interview Questions: In this section, you will be presented with a code snippet and you need to predict the output and answer related questions. These are common in Interviews and equally difficulty.
• Descriptive Java Interview Questions: These are advanced questions testing your understanding of Java ecosystem.

Each question is followed by a set of options. It is highly recommended that you answer the question on your own first by making notes on a sheet of paper and then, match your answer with the given answer. Go through the explanation for each answer.

Practice these questions to test your understanding of Java Programming Language. If you get an answer wrong, study the related topic in more depth.
Best of Luck for your Coding Interview.

Book: Java Interview Questions
Authors: Aditya Chatterjee, Ue Kiao
Publisher: OpenGenus
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Learn Java in one day

Books by Aditya Chatterjee

This book “Learn Java in one day: Practical approach for Coding Interview” helps reader understand the basics of Java Programming Language and to implement Algorithmic solutions in Coding Interview.

This book cover:

* Fundamental ideas in Java
* Utilities/ libraries available in Java
* Basic Implementation Strategy for various Algorithms and Data Structures
* Implementations of all concepts

Going through t

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This book “Learn Java in one day: Practical approach for Coding Interview” helps reader understand the basics of Java Programming Language and to implement Algorithmic solutions in Coding Interview.

This book cover:

* Fundamental ideas in Java
* Utilities/ libraries available in Java
* Basic Implementation Strategy for various Algorithms and Data Structures
* Implementations of all concepts

Going through the implementations in this book is very important as it gives the reader a sense of practice.

If you are out of practice for Coding Interviews but have strong Problem-Solving Skills, this book is a must read as it makes you ready to clear Coding Interviews successfully in just one day.
It is advised on finish this book in one sitting with full focus for effective results.

Best of Luck for your Coding Interview.

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Rust Programming Interview Questions

Books by Aditya Chatterjee

This book “Rust Programming Interview Questions” prepare you for your upcoming Coding Interview on Rust Programming Language. Rust is becoming an important and promising Programming Language in the league of C++, Java and Python.

Learning and using Rust makes you a relevant Programmer in the future and help tap into a hot Programming Job segment.

This book present Multiple Choice Questions (MCQs) on Rust. Each question

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This book “Rust Programming Interview Questions” prepare you for your upcoming Coding Interview on Rust Programming Language. Rust is becoming an important and promising Programming Language in the league of C++, Java and Python.

Learning and using Rust makes you a relevant Programmer in the future and help tap into a hot Programming Job segment.

This book present Multiple Choice Questions (MCQs) on Rust. Each question is supported by 4 options where only one option is correct. The questions are carefully selected from real Coding Interviews at top Software Companies.
Each question is followed by the right answer and a brief supporting explanation. You should answer the question first on your own before going into the answer.

This will give you a quick practice to test your knowledge.

Book: Rust Programming Interview Questions
Authors: Aditya Chatterjee, Ue Kiao
Publisher: OpenGenus

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Computational Geometry for the day before your Coding Interview

Books by Aditya Chatterjee

This book “Computational Geometry for the day before your Coding Interview” is carefully designed to help you get into Problem Solving Mindset for Coding Interview within a day.

We have carefully selected 5 problems which you can complete in a couple of hours. The problems are such that it captures all key ideas of Computational Geometry important for Coding Interviews. With this, you will be able to crack any Coding Interview

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This book “Computational Geometry for the day before your Coding Interview” is carefully designed to help you get into Problem Solving Mindset for Coding Interview within a day.

We have carefully selected 5 problems which you can complete in a couple of hours. The problems are such that it captures all key ideas of Computational Geometry important for Coding Interviews. With this, you will be able to crack any Coding Interview easily.

We have covered the following problems:

* Introduction to Computational Geometry
* Shortest distance between a Line and Point in 3D plane
* Find mirror image of point in 2D plane
* Number of Integral points inside a triangle
* Maximum points on a line
* Closest Pair of Points

In addition to the explanation of the efficient algorithms to solve the problems, we have covered:Related theorems and concepts
Implementations: So, you can revise your implementation skills and easily implement Computational Geometry ideas.

Best of Luck for your Coding Interview.

Book: Computational Geometry for the day before your Coding Interview
Series: Day before Coding Interview
Authors (2): Aditya Chatterjee, Ue Kiao
Contributors (4): Rohan Chandrashekar, Joe Gorst, Susmita Bhattacharya, Kartik Keyan Kant.
Published: February 2022 (1st Edition)
Publisher: OpenGenus

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String Algorithms for the day before your Coding Interview

Books by Aditya Chatterjee

Strings are fundamental data type in real world and developing algorithms to deal with it is an important domain. In interviews, often, string algorithms are most insightful and challenging.

In this guide for the day before your coding interview, we have explored some problems and demonstrated the thought process to solve it starting from the brute force solutions.
In the process, we have covered all fundamental ideas along with applying Dynamic Pr

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Strings are fundamental data type in real world and developing algorithms to deal with it is an important domain. In interviews, often, string algorithms are most insightful and challenging.

In this guide for the day before your coding interview, we have explored some problems and demonstrated the thought process to solve it starting from the brute force solutions.
In the process, we have covered all fundamental ideas along with applying Dynamic Programming to String algorithms so that you are able to solve all string-based problems.

Some of the problems we have covered are:

• Check substring: This is an important fundamental problem where we learn how strings can be handled just like numeric data and algorithms for numeric data can be leveraged.
Some of the core concepts we explored are string hashing, rolling hash and much more.

• Longest common substring: This is a core problem as this uses the concepts we gained in the previous problems and an alternative solution is to use Dynamic Programming.

• Longest repeating substring: In line with our previous problem, we explored how to apply Dynamic Programming for this problem. The key distinction is that we are dealing with just 1 string instead of 2 strings as in the previous problem.

With these problems and the thought process to solve them, you will be fully prepared.

Read this book now and ace your upcoming coding interview. This is a must read for everyone preparing for Coding Interviews at top companies.

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Dynamic Programming on Trees

Books by Aditya Chatterjee

This book "Dynamic Programming on Trees" is a deep dive into applying Dynamic Programming technique on Tree Data Structure based problems. On completing this book, you will have these core skills:

* Strong hold on Dynamic Programming on Trees
* Easily solve Dynamic Programming problems in Coding Interview

Best approach to go through this book:

* Master the basics (Part 1): This part introduces you to the basics of Tree

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This book "Dynamic Programming on Trees" is a deep dive into applying Dynamic Programming technique on Tree Data Structure based problems. On completing this book, you will have these core skills:

* Strong hold on Dynamic Programming on Trees
* Easily solve Dynamic Programming problems in Coding Interview

Best approach to go through this book:

* Master the basics (Part 1): This part introduces you to the basics of Tree Data Structure, Dynamic Programming (DP) and how DP can be applied on Tree.

* Practice Problems on Tree DP (Part 2): Practice is a key to success for Coding Interviews, Competitive Programming and Efficient Problem Solving.

* Practice Problems on Graph DP (Part 3): Tree is a restricted version of a Graph and problems in this section will take you to the next level.

Table of contents:

* Introduction to Tree
* Introduction to Dynamic Programming
* Dynamic Programming on Tree
* Practice Problems:
* Find height of every node of Binary Tree
* Find diameter of Binary Tree using height of every node
* Find diameter of N-ary Binary Tree
* Largest Independent Set in Binary Tree
* Binary Lifting with kth ancestor
* Minimum number of nodes to be deleted so that at most k leaves are left
* 20+ Practice Problems on "Dynamic Programming on Trees"

Get started with this book and change the equation of your career.

Book: Dynamic Programming on Trees
Authors (2): Aditya Chatterjee, Ue Kiao
Published: January 2022 (Edition 1)
Publisher: OpenGenus

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Problems on Array

Books by Aditya Chatterjee

This book "Problems on Array: For Interviews and Competitive Programming" is a deep dive into Array Data Structure, important algorithms and Practice problems on Array. On completing this book, you will have these core skills:

* Strong hold on Array (Research Level)
* Easily solve any Array based Coding Interview Problem
* Design Custom Data Structures

Best approach to go through this book:

* Master the basics of

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This book "Problems on Array: For Interviews and Competitive Programming" is a deep dive into Array Data Structure, important algorithms and Practice problems on Array. On completing this book, you will have these core skills:

* Strong hold on Array (Research Level)
* Easily solve any Array based Coding Interview Problem
* Design Custom Data Structures

Best approach to go through this book:

* Master the basics of Array (Part 1): Take your own time in this section as it prepares you to understand the importance and applicability of Array.
* Learn the basic techniques (Part 2): This part equips you with all necessary skills you need to solve any Array based problem efficiently.
* See how a simple array can be modified to support different features (Part 3): This part impacts an important skill that is to design new Data Structure.
* Practice Problems (Part 4): Practice one problem everyday by implementing the solution on your own.

As a bonus, we have provided a Mock Interview practice which will help you test your skills in one of the hardest Array based Coding Interview.

Table of contents:

* Fundamentals of Array
* 10+ Core Array TechniquesExample: Lomuto Partition and much more
* 5+ Types of ArraysExample: Hashed Array Tree and much more
* 20+ Practice Problems on Array
* Bonus: Mock Coding Interview

Book: Problems on Array: For Interviews and Competitive Coding
Authors (3): Aditya Chatterjee, Tushti, Ue Kiao
Publisher: OpenGenus

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Time Complexity Analysis

Books by Aditya Chatterjee

This book “Time Complexity Analysis” introduces you to the basics of Time Complexity notations, meaning of the Complexity values and How to analyze various Algorithmic problems. This book includes Time and Space Complexity cheat sheets at the end as a bonus resource.

We have tackled several significant problems and demonstrated the approach to analyze them and arrived at the Time and Space Complexity of the problems and Algorithms.
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This book “Time Complexity Analysis” introduces you to the basics of Time Complexity notations, meaning of the Complexity values and How to analyze various Algorithmic problems. This book includes Time and Space Complexity cheat sheets at the end as a bonus resource.

We have tackled several significant problems and demonstrated the approach to analyze them and arrived at the Time and Space Complexity of the problems and Algorithms.

This is a MUST-READ book for all Computer Science students and Programmers. Do not miss this opportunity.

You will get a better idea to judge which approach will work better and will be able to make better judgements in your development work.

Some of the key points you will understand:

· Random Access Memory does not take O(1) time. It is complicated and in general, has a Time Complexity of O(√N).

· Multiplication takes O(N^2) time, but the most optimal Algorithm (developed in 2019) takes O(N logN) time which is believed to be the theoretical limit.

· As per Time Complexity, finding the largest element and the ith largest element takes the same order of time.

Book: Time Complexity Analysis
Authors: Aditya Chatterjee; Ue Kiao, PhD.
Contributors (7): Vansh Pratap Singh, Shreya Shah, Vikram Shishupalsingh Bais, Mallika Dey, Siddhant Rao, Shweta Bhardwaj, K. Sai Drishya.

There is no other book that cover these topics. Many students have several misconceptions which are resolved with the book.

Read this book and level up.

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7 days with Binary Tree

Books by Aditya Chatterjee

Do you know that Microsoft Excel uses a Binary Tree to represent the spreadsheet? Go through this book to get the basic idea of how Binary Tree is used to solve problems efficiently.

Binary Tree is one of the most important Data Structure (for Coding Interviews and Real Life System Design) and is equally challenging. With practice and correct way of thinking, you can master it easily and know when to use it in real life problems.

We will

Read More...
Do you know that Microsoft Excel uses a Binary Tree to represent the spreadsheet? Go through this book to get the basic idea of how Binary Tree is used to solve problems efficiently.

Binary Tree is one of the most important Data Structure (for Coding Interviews and Real Life System Design) and is equally challenging. With practice and correct way of thinking, you can master it easily and know when to use it in real life problems.

We will attempt one problem every day in the week and analyze the problem deeply.

Our schedule:

Day 1: Introduction to Binary Tree + Problem 1
Day 2: Check if a Binary Tree is Balanced by Height
Day 3: Find nodes which are at a distance k from root in a Binary Tree
Day 4: Modification of Day 3 Problem
Day 5: Find minimum or maximum element in Binary Search Tree
Day 6: Find kth smallest element in Binary Search Tree
Day 7: Modification of Day 6 Problem

On following this routine sincerely, you will get a strong hold on Binary Tree data structure quickly and will be able to attempt interview and real-life problems easily.

#7daysOfAlgo: a 7-day investment to Algorithmic mastery.

This book is the part of #7daysOfAlgo series.
You should definitely go through this book as it will give you good practice in short time. If you have an upcoming Coding Interview at top Software Companies like Google, Facebook, Apple, Microsoft and others, this book is a MUST.

Authors (2): Aditya Chatterjee, Ue Kiao. (c)

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Binary Tree Problems

Books by Aditya Chatterjee

This book “Binary Tree Problems” is carefully crafted to present you the knowledge and practice (around the data structure, Binary Tree) needed to ace Coding Interviews and Competitive Coding Contests.

The book takes you through the fundamentals of Binary Tree, presents how to implement it in a good and secure way, make you practice key problems, present variants like Threaded Binary Tree, Binary Space Partitioning Tree, Skewed Binar

Read More...
This book “Binary Tree Problems” is carefully crafted to present you the knowledge and practice (around the data structure, Binary Tree) needed to ace Coding Interviews and Competitive Coding Contests.

The book takes you through the fundamentals of Binary Tree, presents how to implement it in a good and secure way, make you practice key problems, present variants like Threaded Binary Tree, Binary Space Partitioning Tree, Skewed Binary Tree, AVL Tree, Treap and much more.

The content covered is deep and is not covered by any other standard book.

Each chapter is followed by a brief note of insight which wraps up your though in the correct direction and is a feast for budding Independent Researchers.

If you aspire you to a good Software Developer, you should definitely get this book. You will be prepared to apply Binary Tree is designing solutions to key real life problems like designing an Excel sheet or making Game Graphics render fast.

Authors: Aditya Chatterjee; Srishti Guleria; Ue Kiao;

Contributors (16): Benjamin QoChuk, Hrithik Shrivastava, Parth Maniyar, Priyanshi Sharma, Rohit Topi, Amruta U. Koshe, Ayush Sonare, Akshay Gopani, Rashmitha, Manasvi Singh, Sahil Silare, Vaibhav Gupta, Vishnu S Reddy, Kyatham Srikanth, Rupali Kavale, Yash Aggarwal;

Published: May 2021 © iq.OpenGenus.org

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Dynamic Programming for the day before your coding interview

Books by Aditya Chatterjee

Dynamic Programming is a fundamental algorithmic technique which is behind solving some of the toughest computing problems. Have an upcoming Coding Interview? Get this book now.

In this book, we have covered some Dynamic Programming problems which will give you the general idea of formulating a Dynamic Programming solution and some practice on applying it on a variety of problems.

Some of the problems we have covered are:

* Permu

Read More...
Dynamic Programming is a fundamental algorithmic technique which is behind solving some of the toughest computing problems. Have an upcoming Coding Interview? Get this book now.

In this book, we have covered some Dynamic Programming problems which will give you the general idea of formulating a Dynamic Programming solution and some practice on applying it on a variety of problems.

Some of the problems we have covered are:

* Permutation coefficient

* Longest Common Substring

* XOR value

* K edges

This problem shows a problem where Dynamic Programming is not the most efficient solution but is in the right path.

We have covered other relevant solutions and ideas as well so that you have the complete idea of the problems and understand deeply the significance of Dynamic Programming in respect to the problems.

This book has been carefully prepared and reviewed by Top programmers and Algorithmic researchers and members of OpenGenus. We would like to thank Aditya Chatterjee and Ue Kiao for their expertise in this domain and reviews from professors at The University of Tokyo and Tokyo Institute of Technology.

Read this book now and ace your upcoming coding interview. This is a must read for everyone preparing for Coding Interviews at top companies.
Buy Now

7 days with Dynamic Programming

Books by Aditya Chatterjee

Become Dynamic Programming Master in 7 days

Dynamic Programming is one of the most important algorithmic domains and is equally challenging. With practice and correct way of thinking, you can master it easily.

If a problem takes O(2^N) time to search a solution among possible solutions, Dynamic Programming has the potential to reduce it to O(N) or polynomial time thereby reducing the search space.

We will attempt one problem ever

Read More...
Become Dynamic Programming Master in 7 days

Dynamic Programming is one of the most important algorithmic domains and is equally challenging. With practice and correct way of thinking, you can master it easily.

If a problem takes O(2^N) time to search a solution among possible solutions, Dynamic Programming has the potential to reduce it to O(N) or polynomial time thereby reducing the search space.

We will attempt one problem every day in this week and analyze the problem deeply.

Our schedule:
• Day 1: Introduction + Longest Increasing Subsequence
• Day 2: 2D version of Day 1 problems
• Day 3: Dynamic Programming on Strings
• Day 4: Modified version of Day 3 problems
• Day 5: Dynamic Programming for String patterns (Longest Palindromic Substring)
• Day 6: Modified version of Day 4 problems
• Day 7: 2 conditions on 1 data point

On following this routine sincerely, you will get a strong hold on Dynamic Programming and will be able to attempt interview and real-life problems easily.

#7daysOfAlgo: a 7-day investment to Algorithmic mastery.

(C) iq.OPENGENUS.org

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Author Bio <p>Aditya Chatterjee is an Independent Algorithmic Researcher, Software Developer and Technical Author. He is the founding member of OPENGENUS, an organization focused on changing Internet consumption.</p> <p>He has collaborated with over 500 researchers and has mentored over 3000 learners personally across the Globe through the Internship program at OPENGENUS.</p>

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Aditya Chatterjee

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Binary Search Problems

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Linked List Problems

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Computational Geometry for the day before your Coding Interview

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String Algorithms for the day before your Coding Interview

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Dynamic Programming on Trees

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Problems on Array

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Time Complexity Analysis

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7 days with Binary Tree

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Binary Tree Problems

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Dynamic Programming for the day before your coding interview

Books by Aditya Chatterjee

7 days with Dynamic Programming

Books by Aditya Chatterjee

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