📘 Data Structures & Algorithms (DSA) + LeetCode Solutions

Welcome! 👋
This repository contains my personal study material and solutions for Data Structures & Algorithms (DSA) and LeetCode problems, mainly implemented in C# (with some notes/examples in other languages when useful).

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📂 Repository Structure

📦 DSA-LeetCode ├── Arrays/ # Array problems and notes ├── Hashing/ # HashSet & Dictionary problems ├── Strings/ # String manipulation problems ├── LinkedList/ # Linked List problems ├── Trees/ # Binary Tree, BST problems ├── Graphs/ # Graph theory and traversal problems ├── Notes/ # Study notes, explanations, cheatsheets └── README.md # This file

yaml Copy code

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📑 Contents

• ✅ Study Notes
  • Key concepts from Data Structures & Algorithms
  • Explanations of important patterns (sliding window, hashing, prefix sums, etc.)
• ✅ LeetCode Solutions
  • Clean, commented C# solutions
  • Organized by topic (Arrays, Hashing, Strings, etc.)
• ✅ Complexity Analysis
  • Time and space complexity explained for each solution

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🛠 Languages & Tools

• C# / .NET (main implementation)
• Python (sometimes for pseudocode / quick testing)
• Git + GitHub for version control

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🎯 Goals

• Strengthen understanding of DSA fundamentals
• Practice LeetCode / interview problems
• Build a reference repo for future revisions

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📌 How to Use

1. Clone the repo:

   git clone https://github.com/your-username/DSA-LeetCode.git
   cd DSA-LeetCode

Explore the topics folder (Arrays/, Hashing/, etc.)

Open solutions in your editor (e.g., Visual Studio Code)

Run C# solutions using:

bash Copy code dotnet run 📚 Resources I Use NeetCode 150

LeetCode

Cracking the Coding Interview by Gayle Laakmann McDowell

Various YouTube playlists & blogs

🚀 Progress Tracker Arrays & Hashing

Two Pointers

Sliding Window

Stack

Binary Search

Trees

Graphs

🤝 Contributions This repo is mainly for my personal learning, but suggestions and optimizations are welcome! Feel free to open a PR or issue.

📬 Contact GitHub: blank019

LinkedIn: https://www.linkedin.com/in/ahmed-mamdouh04/

FOR STUDY MATERIAL PLEASE REFER TO THIS LINK:

https://www.linkedin.com/in/ahmed-mamdouh04/

✨ “DSA is not about memorizing algorithms, but about learning problem-solving patterns.”