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Postings from August 2002
On Fri, 9 Aug 2002, Markus Laire wrote:
> >>$z=pop;sub g{vec"\x10\xd7\xa9\x98b\xef",pop,2}
> >>print$z<2||(1+g$z%25)*(1,3,2,4)[g 24-$z/25%25]*6*(1+g$z/625)%10,$/
> >> Has anyone else tried lookup instead of computing n!. I'd like to
> >> know shortest possible solution for this sub-problem also.
> > For a general direct method, see
> > http://www.mathpages.com/home/kmath489.htm
>
> That seems to be allmost the same lookup method I came up with,
> except that it uses unnecessary large table (100 items instead of 25)
> and base 5 instead of 25 which doubles the steps.
>
See the bottom of http://cpp-home.com/contests/16/code.cpp for another
method that only uses one lookup table. I too concluded that any such method
was too long though.
--
Stephen Turner, Cambridge, UK http://homepage.ntlworld.com/adelie/stephen/
"This is Henman's 8th Wimbledon, and he's only lost 7 matches." BBC, 2/Jul/01
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