Leetcode Patterns
Background
Leetcode Patterns is a repository designed for anyone aiming to enhance their problem-solving skills, especially for software engineering interviews. The project organizes problems into specific subtopics, allowing learners to concentrate on commonly used patterns instead of randomly solving questions. These problems are available on [leetcode.com], with some requiring a [Leetcode Premium] subscription.
Fundamentals
To achieve the best results when practicing, it is crucial to understand the methods and runtimes of various data structures and algorithms. Key data structures include:
- Arrays
- Maps
- Linked Lists
- Queues
- Heaps
- Stacks
- Trees
- Graphs
Additionally, familiarity with the following algorithms is highly recommended:
- Breadth-first search
- Depth-first search
- Binary search
- Recursion
This foundational knowledge equips learners with the necessary tools to tackle complex problems effectively.
Notes
A useful PDF document provides information on main data structures in Java. Familiarity with certain methods like substring(), toCharArray(), Math.max(), Math.min(), and Arrays.fill() is also beneficial when dealing with algorithmic problems.
Question List
Leetcode Patterns offers a comprehensive list of questions, which can be accessed here: Leetcode Patterns Question List. This curated list serves as a roadmap for learners to follow a structured path in their learning journey.
Solutions
For those interested in learning via example, solutions written in Java are available in the solutions branch of the repository. These solutions provide a practical approach to solving the problems in the question list, helping learners understand different problem-solving techniques.
Suggestions
The project is open to suggestions, whether that involves the inclusion or exclusion of certain questions or the addition of new features. Learners and users are encouraged to provide feedback by opening an issue on the GitHub repository.
Acknowledgements
Leetcode Patterns draws significant inspiration from "Grokking the Coding Interview," and incorporates additional problems from the Blind 75 list and a Hackernoon article on [14 Patterns to Ace Any Coding Interview Question]. These resources have enriched the project, making it a comprehensive tool for interview preparation.