Code RoomCNN normalization dtype bug
MediumPrep Room Coding #4227

CNN normalization dtype bug

Vibe & agenticAlgorithms & data structuresMid–Senior~16 min

An AI wrote this normalization of pixel data for a CNN. Training loss won't drop below a plateau. Find the silent dtype bug.

Implement
normalize_pixel_batch(pixels: list[int], mean_value: int, scale: float, wrap_uint8: bool) → list[float]
Examples
in[[5,200,255],10,1,true]out[251,190,245]
in[[5,200,255],10,1,false]out[-5,190,245]
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it (tests, edge cases, reading critically), and how you’d re-prompt or decompose to get it right.

0:00 of about 16 min

Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.