While you claim this to be a non-homework question, I would categorize as homework nevertheless, because you didn't provide any code to start with. You also did not take the trouble to super search on permutations. That would be a good starting point.

To help you on the road: have a look at this. To whack up a first solution, take only the first r items of the permutations, and filter out the duplicates.

Hope this help,

Jeroen
"We are not alone"(FZ)

In reply to Re: nCr arrays of size r by jeroenes
in thread nCr arrays of size r by PsychoSpunk

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