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.
does it touch ?
Back to basics 11 - Max Integer
speed vs size
Vectorize the digits of an Integer
Map all the indices of an Array Indices into a Vector giving Index vs Row and Column
Mastermind IV: Optimal Solver - max of 5 guesses
ismember: Enhanced Time Performance for 'rows' - Speed Scoring (90% savings)
GJam 2014 Rd 1c: Reordering Train Cars (Large)
Loading/Expanding a ZIP file from File Exchange
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