🚀 Data Structures and Algorithms in C++

A comprehensive collection of Data Structures, Algorithms, C++ STL, and LeetCode solutions implemented in C++ as part of my learning journey.

This repository serves as a personal DSA knowledge base, interview preparation resource, and problem-solving portfolio.

📖 About This Repository

This repository is dedicated to learning and practicing:

• Data Structures
• Algorithms
• Problem Solving
• Competitive Programming Concepts
• Interview Preparation

All programs are written in C++ with a focus on understanding concepts, optimizing solutions, and improving coding skills.

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📚 Topics Covered

🔢 Arrays

• Array Traversal
• Insertion & Deletion
• Searching
• Rotation Problems
• Prefix Sum Concepts

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🔍 Searching Algorithms

• Linear Search
• Binary Search
• Lower Bound
• Upper Bound
• Search-Based LeetCode Problems

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📊 Sorting Algorithms

• Bubble Sort
• Selection Sort
• Insertion Sort
• Merge Sort
• Quick Sort
• Counting Sort
• Sorting-Based Problem Solving

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🔗 Linked Lists

• Singly Linked List
• Doubly Linked List
• Circular Linked List
• Insertion Operations
• Deletion Operations
• Reversal
• Searching
• Linked List Interview Problems

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📚 Stack

• Stack using Arrays
• Stack using Linked Lists
• Push
• Pop
• Peek
• Parentheses Matching
• Expression Evaluation

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🚶 Queue

• Simple Queue
• Circular Queue
• Queue using Linked List
• Deque Basics

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🌳 Trees

• Binary Tree

• Binary Search Tree (BST)

• Tree Traversals

  • Inorder
  • Preorder
  • Postorder
  • Level Order

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🌐 Graphs

• Graph Representation
• Breadth First Search (BFS)
• Depth First Search (DFS)

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🔄 Recursion

• Basic Recursion Problems
• Recursive Thinking
• Backtracking Fundamentals

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⚡ C++ STL (Standard Template Library)

Containers

• Vector
• Pair
• Array
• List
• Stack
• Queue
• Priority Queue
• Set
• Multiset
• Unordered Set
• Map
• Multimap
• Unordered Map

Algorithms

• sort()
• reverse()
• max_element()
• min_element()
• binary_search()
• lower_bound()
• upper_bound()
• next_permutation()
• count()

Utility Functions

• Iterators
• Lambda Functions
• Comparators

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🧩 LeetCode Solutions

A growing collection of LeetCode problems covering:

• Arrays
• Strings
• Linked Lists
• Stack
• Queue
• Recursion
• Trees
• Binary Search
• STL-Based Problems
• Two Pointers
• Sliding Window
• Hashing
• Sorting

Each solution focuses on:

• Problem Understanding
• Optimal Approach
• Time Complexity Analysis
• Space Complexity Analysis

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🎯 Repository Goals

• Strengthen DSA Fundamentals
• Master Problem Solving
• Improve Coding Skills
• Prepare for Technical Interviews
• Learn Efficient Algorithms
• Practice Competitive Programming

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📈 Current Learning Journey

✔ Arrays

✔ Searching

✔ Sorting

✔ Linked Lists

✔ Stack

✔ Queue

✔ C++ STL

✔ LeetCode Problem Solving

🔄 Trees

🔄 Graphs

🔄 Dynamic Programming

🚀 More topics coming soon...

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🧩 Problem Solving

• LeetCode Problems
• Practice Questions
• Algorithmic Thinking

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🛠 Technologies Used

• C++
• VS Code
• Git
• GitHub

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🎯 Learning Objectives

• Understand core DSA concepts
• Improve problem-solving ability
• Prepare for coding interviews
• Build strong programming fundamentals
• Learn efficient algorithm design

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🚀 Getting Started

Clone Repository

git clone https://github.com/HafizEngineerMuhammadAbdullah/Data-Structures-And-Algorithm-In-C-.git

Open Project

cd Data-Structures-And-Algorithm-In-C-

Compile Program

g++ filename.cpp -o output

Run Program

./output

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📈 Repository Progress

✔ Arrays

✔ Linked Lists

✔ Stack

✔ Queue

✔ Searching

✔ Sorting

🔄 Trees (In Progress)

🔄 Graphs (In Progress)

🔄 Dynamic Programming (Upcoming)

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🌟 Future Plans

• Advanced Trees
• Graph Algorithms
• Dynamic Programming
• Greedy Algorithms
• Backtracking
• Sliding Window Techniques
• Two Pointer Techniques
• Competitive Programming Problems

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🤝 Contributions

Contributions, suggestions, and improvements are welcome.

If you find this repository useful, consider giving it a ⭐.

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👨‍💻 Author

Muhammad Abdullah

GitHub: https://github.com/HafizEngineerMuhammadAbdullah

LinkedIn: https://www.linkedin.com/in/muhammad-abdullah-360a87384/

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💡 Quote

"Consistency is more important than perfection."

🚀 Keep Learning. Keep Building. Keep Growing.