CP Notes

Capture competitive programming patterns, mistakes, snippets, and editorial takeaways.

CP Notes helps you remember what you learn from competitive programming practice. Capture useful insights while solving problems, then revisit them in your personal programming diary. Works with LeetCode, Codeforces, CodeChef, and AtCoder, with manual problem entry available for other platforms. Keep your learning organized with four focused note types: • Patterns — Record when to recognize an approach, its core idea, and time complexity. • Mistakes — Document what went wrong, from missed edge cases to implementation bugs. • Snippets — Save reusable code with language labels and tags. • Editorial takeaways — Capture the key insight that helped you understand a solution. Open the extension on a supported problem page to fill in the problem title and URL automatically. Review or edit those details, write your note, and save it to your account. Use the companion website to search your notes, browse your timeline, edit entries, and review mistake statistics. Local draft recovery helps you continue unfinished notes when you return to the same problem and note type. CP Notes is currently an invitation-only beta. An invited account and an internet connection are required to sign in and save notes. Complete your account setup through your invitation link before signing in to the extension.