LeetCode Challenges & Conceptual Interview Prep 🚀

Welcome to the LeetCode Challenges repository. This project centralizes structured, optimized Java solutions to algorithmic problems alongside dedicated mock questions targeted at mastering fundamental core computing concepts.

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🗺️ Table of Contents

• Key Features
• Repository Structure
• Topics Covered
• Getting Started
• License

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✨ Key Features

• Production-Grade Java: Solutions written focusing on optimal runtime (Time Complexity) and memory usage (Space Complexity).
• Concept Clearance Tools: Deep-dives into fundamental data structures through custom implementations and mock test problems.
• Modern Java Practices: Code utilizes practical modern APIs up through Java 11 and Java 17.

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📂 Repository Structure

The workspace follows a clean, standardized Java application layout:

• src/: The main source folder maintaining all algorithm solutions, package definitions, and conceptual mock problems.
• .vscode/: Custom workspace configuration settings optimized for immediate execution in Visual Studio Code.

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🧠 Topics Covered

This repository actively archives problems and solutions across these critical engineering domains:

🧩 Data Structures

• HashMaps: Collision handling, lookup optimization, and frequency counting.
• Stacks & Queues: Linear data pipelines, lifo/fifo ordering patterns, and buffer handling.
• Arrays & Matrices: In-place mutations, sliding window algorithms, and two-pointer passes.

⚙️ Design Patterns & Best Practices

• SOLID Principles: Object-oriented design blueprints for building modular, maintainable software.
• Singleton Pattern: Creational design workflows for thread-safe global access resource configurations.

🗄️ Database & Queries

• SQL Queries: Relational database operations, intricate joins, grouping, and analytical window functions.

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💻 Getting Started

Prerequisites

• Ensure you have the Java Development Kit (JDK 11 or 17) installed.
• Visual Studio Code with the Extension Pack for Java is highly recommended.

Local Setup

1. Clone the repository:

   git clone https://github.com/MrAkashKumar/leetcode-challanges.git
   cd leetcode-challanges

2. Open the directory in VS Code. The IDE will auto-detect the compiled binaries workspace output path under the bin/ folder.

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📄 License

This repository is licensed under the GPL-3.0 License. Feel free to fork, solve, and extend this repository for your personal interview preparation journey!