A continuously updated collection of LeetCode solutions, algorithm explanations, data structures, and coding interview patterns.
This repository contains solved LeetCode problems with explanations, complexity analysis, and source code. Problems are organized by LeetCode number and grouped by algorithmic pattern, data structure, difficulty, and programming language.
- Comprehensive Explanations: Step-by-step algorithm walkthroughs, key insights, and common pitfalls.
- Multi-Language Solutions: Python, C++, JavaScript, TypeScript, Java, SQL, and more.
-
Complexity Analysis: Explicit Time and Space complexity (
$O(N)$ ,$O(\log N)$ , $O(1)$) for every solution. - Pattern & Topic Indexing: Grouped by Binary Search, Sliding Window, Two Pointers, Hash Maps, Stacks, Trees, Graphs, Dynamic Programming, and SQL.
-
Machine-Readable Metadata: Structured JSON catalog available in
metadata/problems.json.
- Hash Map
- Two Pointers
- Sliding Window
- Binary Search
- Dynamic Programming
- Greedy
- Monotonic Stack
- Stack & Queue
- Tree & Graph
- Linked List
- Math & Logic
- Database / SQL
- Backtracking
- Prefix Sum
- Fast & Slow Pointers
- Python Solutions
- C++ Solutions
- JavaScript Solutions
- TypeScript Solutions
- Java Solutions
- SQL Solutions
Browse the full index of all solved problems in All_Problems.md.
AlbinMath/leetcode
├── README.md
├── All_Problems.md
├── patterns/ # Categorized pattern hubs
├── algorithms/ # Algorithm index hubs
├── data-structures/ # Data structure index hubs
├── difficulty/ # Easy, Medium, Hard hubs
├── languages/ # Language-specific hubs
├── metadata/ # problems.json dataset
├── scripts/ # Automation scripts
└── leetcode/ # Standardized problem directories
GitHub: AlbinMath/leetcode
Continuously updated as new LeetCode problems are solved.