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 (http://www.kaggle.com/c/packing-santas-sleigh/forums/t/6934/how-d-you-do-it/38414#post38414) 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.
2 b | ~ 2 b
Find the largest value in the 3D matrix
Find the maximum number of decimal places in a set of numbers
GJam 2015 Rd1B: Noisy Neighbors
Hyperspectral Processing: Determine Material Components given a Hyperspectral vector
Vine Contest 1-D Case Optimization: Board 78
Primes for Large N: 2^30, System Memory Limit
RISK Calculator - Large Armies, High Accuracy, Fast
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