🧠 LeetCode Solution Explainer

An AI-powered DSA tutor that explains your own LeetCode solutions — instantly.

🔗 Live Demo: https://leetcode-solution-explainer-403884323000.asia-southeast1.run.app/

🎥 Built for: Google's 5-Day AI Agents Intensive — Day 1 Assignment (AI Studio → Cloud Run)

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💡 Why this exists

Most students can copy-paste a LeetCode solution from YouTube but can't explain it in an interview. This tool closes that gap — paste your code, and an AI tutor breaks down the intuition, pattern, complexity, and a memory trick, so you actually retain it instead of memorizing it.

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✨ Features

• 📝 Paste any solution (Python / Java / C++ / JavaScript)

• ⚡ One-click sample solutions (Two Sum, Reverse Linked List, 3Sum, Longest Substring)

• 🤖 Powered by Gemini 2.0 Flash

• 🃏 Structured explanation cards:

  • 💡 Intuition — plain-English explanation
  • 🧩 Pattern Used — e.g. Hash Map, Sliding Window, BFS
  • ⏱️ Time & Space Complexity — Big O with reasoning
  • 🧠 How to Remember This — a retention trick

• 📋 Copy button on every card

• 🌗 Light / Dark / Auto theme

• 📱 Fully responsive design

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🛠️ Tech Stack

Layer	Tech
Frontend	React + TypeScript + Vite
AI	Gemini 2.0 Flash
Styling	CSS
Deployment	Google AI Studio + Cloud Run
Runtime	Node.js

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🖼️ Preview

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🚀 Live Demo

Visit the deployed application:

https://leetcode-solution-explainer-403884323000.asia-southeast1.run.app/

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💻 Run Locally

git clone https://github.com/<your-username>/leetcode-solution-explainer.git

cd leetcode-solution-explainer

npm install

npm run dev

Create a .env file:

GEMINI_API_KEY=your_api_key_here

Then open:

http://localhost:5173

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☁️ Deployment

Built and deployed using Google AI Studio's Deploy to Cloud Run integration.

Cloud Run automatically handles:

• Containerization
• HTTPS
• Autoscaling
• Scale-to-zero when idle

No manual infrastructure setup required.

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🗺️ Roadmap

• Save explanation history
• Export explanation cards as images
• Multi-language support
• User authentication
• Shareable explanation links

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🙏 Acknowledgements

Built as part of Google's 5-Day AI Agents Intensive (Vibe Coding Course).

Special thanks to:

• Google AI Studio
• Gemini 2.0 Flash
• Google Cloud Run

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⭐ If this project helped you understand DSA concepts better, consider giving it a star!