GitHub - onixlas/algorithmic-patterns: Leetcode 75 study plan tasks

This repository contains curated solutions to a subset of common algorithmic problems, primarily based on the LeetCode 75 study plan.

The purpose of this repository is to maintain algorithmic fluency and document common problem-solving patterns that frequently appear in technical interviews and real-world engineering tasks.

This is not intended as a competitive programming showcase, but rather as a structured reference for fundamental data structures and algorithms.

📌 Scope

The problems cover a range of foundational algorithmic topics, including:

• Arrays and strings
• Two pointers
• Sliding window
• Prefix sums
• Hash-based data structures
• Stack and queue
• Basic graph and traversal patterns

Each solution focuses on:

• clarity and readability
• explicit time and space complexity
• well-known algorithmic patterns rather than clever tricks

🗂 Repository Structure

.
├── pyproject.toml        # Project configuration
├── src/
│   ├── array_string/     # Array and string manipulation patterns
│   ├── hashmap_set/      # Hash map and set based problems
│   ├── prefix_sum/       # Prefix sum techniques
│   ├── sliding_window/   # Sliding window pattern
│   ├── two_pointers/     # Two pointers pattern
│   ├── stack/            # Stack-based problems
│   └── queue/            # Queue-based problems
│
│   # Each submodule follows a consistent structure:
│   # <problem_name>/
│   # ├── __init__.py
│   # └── solution.py
│
└── tests/                # Tests for all problems

🧠 Design principles

• Clean, readable Python code
• Emphasis on algorithmic patterns
• Avoidance of overly compact or non-obvious solutions
• Explicit handling of edge cases

🛠 Language

• Python

🔎 Notes

This repository complements my primary work in machine learning and LLM-based systems, where a solid understanding of algorithms and data structures remains essential for building reliable and scalable production systems.