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Alfonso Nieto-Castanon

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Alfonso Nieto-Castanon submitted a Comment to Solution 403281

this solution packs all 240 boxes (99.1% efficiency); Rather than entering as many boxes as possible in each level, in the actual contest I used a somewhat more convoluted strategy that attempted to condition the box heights so that they would also pack nicely vertically across sequential levels, but the 2d-packing solver works just as well for these simpler "unconstrained" cases. Here ( is a more detailed description of the method I used in that contest, and you may find a link to the solution code there (as well as in this solution) in case you are interested.

on 13 Feb 2014

Alfonso Nieto-Castanon submitted a Comment to Problem 2154. Distances in a circle

I think so too

on 6 Feb 2014