Welcome to my Data Structures & Algorithms (DSA) and LeetCode Solutions repository. This repository contains solutions to coding problems that I solve while practicing problem-solving, algorithmic thinking, and technical interview preparation.
The goal is to build a strong understanding of fundamental data structures and algorithms while improving the ability to analyze problems and develop efficient solutions.
- Strengthen Data Structures & Algorithms fundamentals
- Improve problem-solving and logical thinking
- Practice coding consistently
- Understand time and space complexity
- Prepare for technical interviews
- Maintain a structured collection of solved problems
- Arrays
- Strings
- Linked Lists
- Stacks
- Queues
- Hash Tables
- Sets
- Trees
- Binary Search Trees
- Heaps / Priority Queues
- Graphs
- Searching
- Sorting
- Recursion
- Backtracking
- Two Pointers
- Sliding Window
- Binary Search
- Greedy Algorithms
- Breadth-First Search (BFS)
- Depth-First Search (DFS)
- Dynamic Programming
- Graph Algorithms
Solutions may include problems related to:
Arrays
Strings
Hashing
Two Pointers
Sliding Window
Linked Lists
Stacks & Queues
Binary Search
Trees
Graphs
Recursion
Backtracking
Greedy
Dynamic Programming
Each solution focuses on providing a clear and understandable implementation.
Example:
Problem
↓
Understand Requirements
↓
Develop Approach
↓
Implement Solution
↓
Analyze Complexity
↓
Optimize if Possible
Where applicable, solutions include:
- Problem-solving approach
- Algorithm explanation
- Code implementation
- Time complexity
- Space complexity
Understanding complexity is an important part of this repository.
Common complexities include:
| Complexity | Meaning |
|---|---|
| O(1) | Constant |
| O(log n) | Logarithmic |
| O(n) | Linear |
| O(n log n) | Linearithmic |
| O(n²) | Quadratic |
| O(2ⁿ) | Exponential |
The goal is not only to solve a problem but also to understand why a particular solution is efficient.
This repository is continuously updated as I solve more problems and explore new DSA concepts.
Problems Solved: Continuously Growing 🚀
Topics Covered: Continuously Expanding 📚
Goal: Strong DSA Fundamentals 💪
Solutions may be implemented using:
- JavaScript
- Python
- C++
- Java
The primary language can vary depending on the problem and learning objective.
Through this repository, I aim to improve:
- Algorithmic thinking
- Logical problem solving
- Code optimization
- Complexity analysis
- Interview problem-solving skills
- Understanding of core computer science concepts
This repository primarily contains my personal practice solutions. Suggestions, alternative approaches, and optimized solutions are welcome for learning purposes.
If this repository helps you with your own DSA preparation, consider giving it a ⭐.
Muhammad Zain
Computer Science graduate and aspiring software/data professional focused on continuously improving problem-solving and software development skills.
These solutions are created for learning and educational purposes. Multiple approaches may exist for the same problem, and solutions may be improved as my understanding of algorithms develops.