[Haskell-cafe] xkcd #287 "NP-Complete"

Andrew Coppin andrewcoppin at btinternet.com
Tue Jul 10 17:02:33 EDT 2007

Hugh Perkins wrote:
> There's a good tutorial on pruning at:
> http://www.cs.nott.ac.uk/~gmh/book.html 
> <http://www.cs.nott.ac.uk/%7Egmh/book.html>  (Section "Slides", number 11)
>     In general, I find this kind of stuff really hard to avoid... :-S

...and indeed, countdown was what I was attempting to solve... o_O

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