[Retros] At-home initial array challenge
elkies at math.harvard.edu
Sun Mar 20 16:49:53 EST 2005
>> I was lucky -- the third thing I tried worked [...]
Francois Labelle responded:
> Congratulations! [...]
>> P.S. Clearly it couldn't have been in 6.5 or 7.0 moves...
> I suspected that something like that was true, but was afraid
> to get it wrong which would have inadvertently added a hint.
> (16+x) type can only be of length odd.5 or even.0
> (x+16) type can only be of length even.0 or even.5
> So clearly length odd.0 is impossible, but how can you dismiss
> length 6.5 quickly? I think that you got it wrong!
Indeed I did, sorry. At any rate 7.0 is impossible.
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