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that would alternate the suit for each card, and all the aces would be the same suit, etc.



If you also take the cards modulo 13 for their face, this approach works.

4 and 13 are relatively prime, so each number between 1 and 52 can be uniquely represented by the function (x) -> (x%13, x%4).


Yes, obviously it's not a drop in replacement as the behavior is different, but it does the same thing, giving you a number from 0 to 3 based on the card number. Pairing it with i%13 works just fine.




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