The total number of iterations needed to find all unique solutions is ((3*4)^4)/8 == 2592, as the unique solution does not depend on the cubes' order :) And all 8 solutions can be built using simple permutation of an array representing the unique one.

My regexp solution really uses the smallest possible number of loops, i think. Be stricter, it does not use loops at all to find the solution — only during the pre-processing :)))

It's difficult to make a good benchmark, as all presented scripts print their output directly to STDOUT and need to be a bit modified to become comparable by cmpthese(). But i'll try to do it today, if i have enough time.

In reply to Re^2: Challenge: "Insanity" Cube Puzzle by Ieronim
in thread Challenge: "Insanity" Cube Puzzle by liverpole

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