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Speedrun

A seeded solve-a-thon against the clock and your own ghost.

0 finished runs saved locally

The same seed always picks the same problems, so you can race a friend's run code — or your own ghost. Scores are local and honor-system.

Problems
Duration

About 40% Easy, 40% Medium, 20% Hard, spread across categories. Par times: Easy 90s, Medium 150s, Hard 240s.

Import a run code

Paste a friend's code to see their result, then compare it with a finished run of yours on the same seed.

Ghost comparison

Import a run code or load a past run as a ghost to see a per-problem comparison and race it live.

Recent runs

No finished runs yet. Start one above — the last 20 runs stay in this browser.