Congratz! Though, I think your algorithm works only because of a peculiarity in 00..99. If you extend it to 000..999, your algorithm doesn't scale, while mine does. :-)

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We are the carpenters and bricklayers of the Information Age.

The idea is a little like C++ templates, except not quite so brain-meltingly complicated. -- TheDamian, Exegesis 6

Please remember that I'm crufty and crochety. All opinions are purely mine and all code is untested, unless otherwise specified.