Arena
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Every submission runs through the same sandbox, and only the cleanest output earns a spot here. Beat the time, match every edge case, and your handle will show up instantly.
Return to arena →Showing top 20 global finishes
Basic
Implement a token bucket rate limiter
Given the current number of tokens and refill rate, determine if a request should be allowed and return the updated token count.
No finishes yet. Be the first to ship a spotless solution.
Intermediate
Sliding window moving average
Compute the moving average of numeric samples across a fixed window size.
No finishes yet. Be the first to ship a spotless solution.
Advanced
Broadcast payload fan-out
Transform a payload by broadcasting it to multiple subscribers with declarative transforms.
No finishes yet. Be the first to ship a spotless solution.