[Haskell-cafe] uncommon IMO problem - toilet management

[Henning Thielemann]

In the last two days I was invigilator at the International Mathematic 
Olympics 2009 in Bremen, Germany. There we got a problem different from 
the official math problems. :-) Eventually I solved it using Haskell. Read 
the detailed description at
   http://hackage.haskell.org/package/toilet-0.0.1

I think the problem is simple enough to be used in education of 
programming.

(I also think it would have been better to avoid monads and use lazy list 
processing.)