📚 DSA Problems - Data Structures and Algorithms Journey

🎯 About This Repository

Welcome to my DSA (Data Structures and Algorithms) learning repository! This is my personal space where I document my journey of solving programming problems and mastering fundamental concepts. I'm co[...]

📊 Current Progress

• Total Problems Solved: 90+ problems and growing 🚀
• Topics Covered: 3 Major Categories
• Daily Updates: ✅ Active
• Last Updated: December 28, 2025

📈 Daily Commit Activity Graph

🗂️ Repository Structure

DSA-Problems/
├── src/
│   ├── arrays/              # Array-based problems
│   ├── oops/                # Object-Oriented Programming concepts
│   └── recursion/           # Recursion problems and patterns

📖 Topics Covered

1️⃣ Arrays

Exploring fundamental array operations and problem-solving techniques.

Key Concepts:

• Array manipulation
• In-place algorithms
• Two-pointer technique
• Rotation algorithms

2️⃣ Object-Oriented Programming (OOPs)

Deep dive into Java OOP concepts with practical implementations.

Sub-topics:

• 🔹 Abstract Classes - Understanding abstraction and abstract methods
• 🔹 Cloning - Object cloning techniques
• 🔹 Exception Handling - Custom exceptions and error handling
• 🔹 Generics - Type-safe programming with generics
  • Generic classes and interfaces
  • Comparison and Lambda functions
• 🔹 Inheritance - Parent-child class relationships
• 🔹 Interfaces - Contract-based programming
  • Engine implementations
  • Media player interfaces
  • Car system design
• 🔹 Polymorphism - Method overloading and overriding
• 🔹 Singleton Pattern - Design pattern implementation
• 🔹 Practice Projects - Real-world applications

3️⃣ Recursion

Mastering recursive thinking and solving complex problems with elegant solutions.

Categories:

📌 Easy Problems

• Missing Element
• Count Zeroes
• Remove Duplicate

📌 Sorting Algorithms (Recursive)

1. Bubble Sort
2. Merge Sort
3. Quick Sort
4. Selection Sort

📌 Additional Topics

• Array problems using recursion
• Pattern printing
• String manipulation
• Introduction to recursion concepts

🚀 How to Use This Repository

Prerequisites

• Java Development Kit (JDK) 8 or higher
• Any Java IDE (IntelliJ IDEA, Eclipse, VS Code)

Running the Code

1. Clone this repository:

   git clone https://github.com/ziyous09/DSA-Problems. git

2. Navigate to the project directory:

   cd DSA-Problems

3. Open in your preferred IDE or compile and run individual files:

   javac src/arrays/RotateArray.java
   java src/arrays/RotateArray

📈 My Learning Goals

• ✅ Master fundamental data structures
• ✅ Solve problems daily
• ✅ Document my learning journey
• 🔄 Expand to advanced topics (Graphs, Trees, Dynamic Programming)
• 🔄 Participate in coding competitions
• 🔄 Build a strong problem-solving foundation

💪 Daily Commitment

I am committed to:

• 📝 Solving at least one problem daily
• 📤 Pushing code regularly to track progress
• 📊 Maintaining this README with updated statistics
• 🌱 Growing my skills in public

🎓 Learning Resources

This repository reflects concepts learned from various sources including:

• [Kunal Kushwaha ] https://www.youtube.com/@KunalKushwaha
• [Leetcode] https://leetcode.com/
• Java programming tutorials
• Personal practice and experimentation

📫 Connect With Me

Feel free to explore my code, provide feedback, or connect with me on this learning journey!

• GitHub: @ziyous09

📝 License

This repository is for educational purposes. Feel free to use the code for learning and reference.

"The only way to learn a new programming language is by writing programs in it." - Dennis Ritchie