Programming challenge: wildcard exclusion in cartesian products

wkehowski at wkehowski at
Tue Mar 21 08:14:19 CET 2006

After the basic fact of generating the exclusion - a considerable
achievement - the program should be interactive. What if the target set
has thousands or millions of elements? There should be a  loop-like way
('do' in Haskell, for example) to peel off the elements one-by-one and
then terminate.

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