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Welcome to the LeetCode Notes Wiki!

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Leetcode

This repository contains my solutions to LeetCode problems, organized to help learners and developers understand problem-solving techniques, algorithms, and data structures. Each solution includes code in one or more programming languages and a detailed explanation of the approach, making it easy to follow and learn.

Purpose

The goal of this repo is to:

  • Provide clean, well-documented solutions to LeetCode problems.
  • Explain the thought process, algorithms, and optimizations behind each solution.
  • Serve as a personal reference and a resource for others preparing for coding interviews.

Repository Structure

The repo is organized as follows:

  • Folders: Each LeetCode problem has its own folder, named by problem number and title (e.g., P-1-two-sum).

  • Files in Each Folder:

    • Solution Files: Code solutions in languages like Python, Java, or C++ (e.g., solution.py, solution.java).
    • Explanation File: A Markdown file (e.g., README.md) detailing the problem, approach, time/space complexity, and any optimizations.

  • Main README: The root README.md provides an overview and links to key resources or problem categories.

Supported Languages

Solutions are primarily written in:

  • Python
  • Java
  • C++

Some problems may include solutions in additional languages or alternative approaches to highlight different techniques.

How to Use This Repo

  1. Browse by Problem: Navigate to a problem’s folder to find its solution and explanation. See the Problem Index wiki page to browse all problems with their difficulty levels.
  2. Learn Patterns: Check the wiki for guides on common algorithmic patterns (e.g., two-pointer, dynamic programming) as they’re added.
  3. Contribute or Suggest: Feel free to open an issue or pull request if you spot errors or have alternative solutions!
  4. Use Templates: Use the provided templates in the templates folder to maintain consistency in documenting new problems.

Getting Started

  • Start with the main README.md for a quick overview.
  • Explore problem folders directly or use future wiki pages for curated lists by topic or difficulty.
  • Refer to explanation files in each folder for detailed insights into each solution.

Happy Coding! 🚀 and I hope this repo helps you master LeetCode problems!

"Keep practicing, keep learning, and remember - every expert was once a beginner!"

Last Updated: May 31, 2025