📘 LeetCode Solutions

This repository contains my personal solutions to LeetCode problems, written in C++, Python, and SQL. The problems are organized by difficulty and span a wide range of algorithmic topics.

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📂 Folder Structure

Leetcode/

├── Easy/ # Easy difficulty problems

├── Medium/ # Medium difficulty problems

├── Hard/ # Hard difficulty problems

├── SQL/ # SQL query problems

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📄 File Naming Convention

Each file follows the format:

problem_number. problem_name. extension

Examples:

• 1. Two Sum.cpp
• 704. Binary Search.cpp
• 175. Combine Two Tables.sql

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🧠 Topics Covered

Problems are tagged by topic (as retrieved from LeetCode). Here's a breakdown:

✅ Fundamental

• Array ×108
• String ×43
• Sorting ×25
• Two Pointers ×20
• Simulation ×11
• Stack ×9
• Enumeration ×6
• Matrix ×5

🟡 Intermediate

• Math ×54
• Hash Table ×31
• Binary Search ×22
• Bit Manipulation ×19
• Depth-First Search (DFS) ×13
• Breadth-First Search (BFS) ×11
• Tree ×10
• Binary Tree ×10

🔴 Advanced

• Dynamic Programming (DP) ×31
• Backtracking ×7
• Divide and Conquer ×7
• Union Find ×3
• Topological Sort ×3
• Trie ×2
• Shortest Path ×2
• Game Theory ×1