Every Accepted was paid in blood, sweat, and runtime errors.

Note: This documentation and workflow are a work in progress. Expect ongoing improvements and refinements.

Scars of LeetCode is an automation-driven workflow for mastering LeetCode problems, generating high-quality spaced-repetition flashcards, and tracking your progress. It is designed for power users who want:

• Effortless problem management and documentation
• Automated, evidence-based Anki flashcard generation
• Seamless integration with Anki (including WSL support)
• A single source of truth for all your LeetCode learning

Use the new-problem.sh script to scaffold a new problem:

./new-problem.sh <problem_number> <problem_slug> <neetcode_150> # Example: ./new-problem.sh 21 merge-two-sorted-lists true

• <problem_number>: The LeetCode problem number (e.g., 21)
• <problem_slug>: The LeetCode slug (e.g., merge-two-sorted-lists)
• <neetcode_150>: 'true' if part of NeetCode 150, else 'false'

This creates a folder under problems/ with:

• A ready-to-edit README.md (with all required sections)
• A starter solution.py
• Automatic update of the main tracker in problems/README.md

Edit the generated README.md and solution.py for your problem. Follow the template for concise, memory-friendly notes. The tracker will always reflect your current progress.

Prompts in prompts/ ensure your documentation and flashcards are world-class:

• autofill-problem-readme.txt: Guidance for writing the perfect problem README, focusing on intuition, approach, complexity, and key notes. Use this as a reference or with LLMs to auto-generate your README.
• create-update-anki-json.txt: The gold standard for generating Anki flashcards from your README and solution. Cards are designed for active recall, cloze deletions, and spaced repetition. Use this prompt with LLMs to generate a cards.json for each problem.

For each problem, generate a cards.json (using the above prompt and your README/solution). Place it in the problem's folder.

To merge all cards and import them into Anki:

python3 scripts/create_import_anki_flashcards.py

This script will:

• Merge all cards.json files into a master deck (anki/scars-of-leetcode.json)
• Prevent duplicate cards
• Add the NeetCode150 tag automatically if the problem is part of NeetCode 150
• Import all cards into your Anki deck via AnkiConnect

Prerequisite: You must have the AnkiConnect add-on installed in your Anki desktop app.

For WSL users:

1. Open Anki on Windows.
2. Go to Tools → Add-ons → select AnkiConnect → Config.
3. Change the config to:

   { "webBindAddress": "0.0.0.0" }

4. Restart Anki.

This allows the Python script in WSL to connect to Anki running on Windows.

• problems/ — Each problem gets its own folder with README.md, solution.py, and cards.json
• scripts/create_import_anki_flashcards.py — Merges and imports all flashcards into Anki
• anki/scars-of-leetcode.json — Master deck (auto-generated)
• prompts/ — LLM prompts for README and flashcard generation
• new-problem.sh — Script to scaffold new problems and update the tracker

• Always use the provided prompts for README and flashcard generation for consistency and quality.
• Run the Python script regularly to keep your Anki deck up to date.
• Use the NeetCode 150 flag accurately for tagging and filtering.
• Review the generated tracker in problems/README.md for your progress overview.

Contributions, suggestions, and improvements are welcome! Please open an issue or PR.

Happy grinding — and may your scars become your strength.