Community-built coding challenges
Solve real challenges.
Set your own and earn.
Pick from challenges written by fellow developers — your first attempt on every challenge is free. Or publish your own problem and earn coins each time someone fails it.
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How it works
First attempt is free
Try any challenge once without spending a single coin.
Solve and climb
Every solve earns points toward the leaderboard and higher tiers.
Set challenges, earn coins
Publish your own problems and earn every time an attempt fails.
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