in reply to Lights out puzzle

Here's a solution written in perl, then some explanation on how it works.

<Reveal this spoiler or all in this thread>

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Re^2: Lights out puzzle
by raybies (Chaplain) on Nov 29, 2011 at 13:40 UTC
    Now quick someone bribe zentara to put a TK interface to this... and I'll get nothing done for the next week. :)
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In Section Meditations