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Data Structures & Algorithms in Java + 130 Leetcode Problems

Pratik Singhal

4.5

Based on 1,239 ratings

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Pratik Singhal

Picture this: You're sitting in the hot seat of a coding interview, faced with a challenging DSA problem. How do you tackle it with confidence and perfection? That's where my course comes in.

In this course, I am taking you straight to the heart of the action – the top 130 Leetcode problems. Why these specific ones? Because they're the ones tech companies love to throw your way. By mastering these, you'll be ready to ace any coding interview that comes your way.

If you’re wondering why Leetcode?

Picture this: You're sitting in the hot seat of a coding interview, faced with a challenging DSA problem. How do you tackle it with confidence and perfection? That's where my course comes in.

If you’re wondering why Leetcode?

Leetcode is the most popular platform that offers a vast array of coding challenges, frequently used by tech companies in their hiring processes.

Here's why this course is will help you:

We're not simply tossing problems your way and crossing our fingers. Nope, not here.

We will together dive deep into each problem for invaluable insights into underlying concepts and problem-solving techniques, helping you to truly understand and conquer every challenge.

You’ll learn systematic approaches to problem-solving. We’ll help you break them into manageable tasks and craft efficient algorithms, so you can confidently tackle any challenge that comes your way.

One standout feature of this course is the live code implementation. You'll see each problem solved in real-time, giving you a firsthand look at the coding process.

Enhance your coding abilities through practical, hands-on learning, ensuring you're well-prepared for real-world scenarios.

Discover efficient coding practices, optimization techniques, and common pitfalls to avoid, equipping you with the skills to write clean, efficient code.

Follow along step-by-step as we dissect each problem in detail, guiding you through the thought process and live code implementation.

You get to access code sample files accompanying the video lectures, serving as valuable references and guides to support your learning journey and help you implement solutions effectively.

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What's inside

Learning objectives

Top 130 coding interview problems on leetcode
Data structure & algorithms theory with implementation
Leetcode practice problems on dynamic programming, greedy algorithms in java

Leetcode practice problems on graphs, trees, backtracking in java
Leetcode practice problems on arrays, sliding window, two pointer, ad hoc problems in java

Top 130 coding interview problems on leetcode
Data structure & algorithms theory with implementation
Leetcode practice problems on dynamic programming, greedy algorithms in java
Leetcode practice problems on graphs, trees, backtracking in java
Leetcode practice problems on arrays, sliding window, two pointer, ad hoc problems in java

Syllabus

Course Introduction

How to get started with Leetcode ?

In this section we will learn how to calculate time and space complexity for any algorithm from scratch. By the end of this section you will become proficient in time and space complexity calculation

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what should give you pause

and possible dealbreakers

Develops expertise of top 130 Leetcode problems, essential for passing coding interview challenges

Strengthens foundational coding skills and deepens understanding of data structures and algorithms

Covers a variety of problem-solving techniques, including dynamic programming, greedy algorithms, and backtracking

Provides hands-on practice and prepares learners to tackle real-world coding challenges

Led by Pratik Singhal, an expert in coding interviews with a proven track record

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Reviews summary

Comprehensive leetcode prep in java

According to learners, this course is designed as a highly practical and comprehensive guide for coding interview preparation, specifically targeting Data Structures and Algorithms in Java. Students appreciate its focus on mastering 130 top Leetcode problems, which are presented with live code implementation and a systematic approach to problem-solving. The course's emphasis on efficient coding practices and detailed explanations of underlying concepts makes it a valuable resource for those seeking to ace technical interviews.

Solutions and implementations are exclusively in Java.

"As a Java developer, I found the Java-specific implementations very beneficial for my learning."

"It's great for Java users, but those looking for other languages will need to adapt the concepts."

"All the code examples are provided in Java, which is perfect for my current programming focus."

Explains core Data Structures & Algorithms concepts.

"The initial sections on time and space complexity were very helpful in building foundational knowledge."

"I gained a deeper understanding of underlying DSA concepts before diving into the specific problems."

"It really clarified how to approach complex algorithms systematically from a theoretical standpoint."

Features hands-on live coding sessions for problem-solving.

"The live code implementation is a key strength, allowing me to follow the instructor's thought process clearly."

"I appreciate seeing problems solved in real-time, which significantly clarifies the coding process."

"The hands-on approach with accompanying code samples makes learning very effective and practical."

A wide array of high-frequency Leetcode problems are covered.

"This course delivers on its promise to tackle 130 top Leetcode problems across various DSA topics, which is highly beneficial."

"I found the range of problems covered, from arrays to graphs, excellent for interview preparation."

"It's a solid resource for anyone looking to master typical coding interview questions effectively."

Tailored specifically for acing technical coding interviews.

"The course's direct focus on tech company interview problems makes it highly relevant for job seekers."

"I feel much more prepared for coding interviews after going through these systematic approaches."

"This is exactly what I needed to boost my confidence for challenging DSA questions in an interview setting."

Pace might be challenging for absolute beginners in DSA.

"While comprehensive, I found that beginners to DSA might find the sheer volume of problems intense."

"I needed some prior DSA exposure to fully keep up with the rapid pace of problem-solving."

"It's probably best for those with some basic programming and algorithm understanding already."

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Data Structures & Algorithms in Java + 130 Leetcode Problems with these activities:

Review Basic Programming Concepts

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Review basic programming concepts to refresh your knowledge and ensure you have a solid foundation for the course.

Browse courses on Programming Fundamentals

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Go over your notes or textbooks from previous programming courses.
Practice writing simple code snippets to implement basic programming concepts such as variables, data types, and control flow.
Solve easy LeetCode problems to apply your refreshed programming skills.

Organize Your Course Materials

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Organize your course materials such as notes, assignments, quizzes, and exams to improve your ability to find and review them later.

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Create folders or use a digital tool to organize your course materials.
Label and group related materials together.
Regularly update and review your organized materials.

Read a Book on Data Structures and Algorithms

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Review a book on data structures and algorithms to strengthen your foundational knowledge and prepare for coding interviews.

View Introduction to Algorithms, fourth edition on Amazon

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Choose a book on data structures and algorithms that aligns with your skill level.
Read the book thoroughly and take notes on important concepts.
Practice implementing data structures and algorithms in the programming language of your choice.
Solve LeetCode problems using the concepts you learned from the book.
Discuss the book and your learnings with peers or instructors.

Five other activities

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Show all eight activities

Join a Study Group for LeetCode Problems

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Join a study group to collaborate with other students, discuss different approaches to LeetCode problems, and learn from each other.

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Find a study group or create your own with classmates.
Choose LeetCode problems to work on together.
Meet regularly to discuss your solutions and learn from each other.
Share resources and tips related to LeetCode problems.
Provide peer support and encouragement to each other.

Watch Video Lectures on LeetCode Problems

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Watch video lectures from the course to gain insights into different LeetCode problems and solution approaches.

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Choose a LeetCode problem from the course syllabus.
Watch the corresponding video lecture for that problem.
Take notes on the problem-solving approach and implementation details.
Pause the video and try to solve the problem on your own.
Resume the video to check your solution and learn from the instructor's approach. (recommended)

Practice LeetCode Problems

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Practice solving LeetCode problems to improve your problem-solving skills and prepare for coding interviews.

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Pick a LeetCode problem from the course syllabus.
Read the problem statement carefully and understand the requirements.
Break down the problem into smaller subproblems.
Implement your solution in the programming language of your choice. (e.g. Java)
Test your solution against the given test cases.

Create a LeetCode Problem Collection

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Create a collection of LeetCode problems that you have solved or found particularly challenging to reinforce your learning and prepare for coding interviews.

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Identify LeetCode problems that you found interesting or challenging.
Organize the problems into categories or topics.
Create a document or use a tool to store the problem statements, your solutions, and any additional notes.
Review your collection regularly to refresh your knowledge and identify areas for improvement.

Write a Summary of a LeetCode Problem

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Summarize a LeetCode problem to solidify your understanding and improve your communication skills.

Show steps

Pick a LeetCode problem from the course syllabus.
Solve the problem on your own or with the help of course materials.
Write a summary that includes the problem statement, your solution approach, and the time and space complexity of your solution.
Proofread your summary for clarity and accuracy.
Share your summary with a peer or instructor for feedback.

Career center

Learners who complete Data Structures & Algorithms in Java + 130 Leetcode Problems will develop knowledge and skills that may be useful to these careers:

Reading list

We've selected 50 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Data Structures & Algorithms in Java + 130 Leetcode Problems.

Introduction to Algorithms, fourth edition

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This foundational and comprehensive text covering a wide range of algorithms, including a dedicated chapter on greedy algorithms. It provides a rigorous analysis of algorithm correctness and efficiency. is commonly used as a textbook in undergraduate and graduate computer science programs and serves as an essential reference for professionals.

Introduction to Algorithms, fourth edition

Hardcover

$$$$

Introduction to Algorithms, fourth edition

Kindle Edition

$$$

Cracking the Coding Interview

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Provides a comprehensive overview of common coding interview questions and solutions, covering topics such as data structures, algorithms, and problem-solving strategies. It is highly relevant to LeetCode, as it can help candidates prepare for and excel in coding interviews.

Data Structures & Algorithms in Java + 130 Leetcode Problems

What's inside

Learning objectives

Syllabus

Traffic lights

Save this course

Reviews summary

Comprehensive leetcode prep in java

Activities

Career center

Reading list

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