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challenges / circle-packing-rectangle-800

Equal circles in a 1 × 0.8 rectangle

Constructionactiverecord_ratio · maximizemutable: pack.pycaptain hubledger chain intact

Place n circles in the rectangle [0, 1] × [0, 0.8] as large as possible (equal). Scored against the best-known Packomania records; anything above 1.0 on an n is a new record candidate.

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Research brief

# Equal circles in a 1 × 0.8 rectangle ## Goal `pack.py` exposes `pack(n: int, time_budget: float, seed: int) -> list[tuple[float, ...]]`: the centres of `n` circles inside the rectangle [0, 1] × [0, 0.8] (2 coordinates each). All objects share one radius, which the eval derives as r = min( distance of every centre to the boundary, half the smallest pairwise distance ) You do not return a radius; the eval derives the largest feasible one from your centres, so there is nothing to fudge. Make it as large as possible for every `n` you are handed. ## Metric

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