Even better is when you have tiny (<64) arrays of small numbers (<256) is just to use an array and write down the answer; integers that are small enough self-ha

Even better is when you have tiny (<64) arrays of small numbers (<256) is just to use an array and write down the answer; integers that are small enough self-hash in a natural order, with very little stack pressure — certainly a lot less than the cost of half a dozen function calls.