Contact
Have a question, spotted an error, or want to suggest an exercise? We read every message.
When to reach out
📝 Error in an exercise or solution
If you spotted a mistake, please let us know — include the exercise title and a brief description of the issue.
💡 Exercise suggestion
Have an interesting problem you’d like to see covered? Share it with us.
🤝 Collaboration or contribution
Interested in contributing exercises or solutions to the library? We’d love to hear from you.
❓ General question
Anything else — we’re happy to hear from you.
Send a message
We aim to respond within 48 hours. For exercise-related questions, please include the exercise title to help us locate it quickly.
Before you write…
You might find a quick answer in our FAQ or on the About page.