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Over at

http://spoj.sphere.pl/problems/SIZECON/

the task is to come up with the shortest program that solves a
different problem. There's a twist in this one:

Score equals to size of source code of your program except symbols with
ASCII code <= 32.

So blanks, newlines and tabs aren't counted at all. However, no
"control characters" of any kind are counted, and I found a convoluted
way to transform any Perl program so that only 7 "readable" characters
remain. That's currently the shortest solution known (given the
stated metric -- my Perl source is actually over 400 bytes! all but 7
of them have ord < 33, though).

There's probably still room for improvement in the "shortest" Python
program known for this task. No deadlines, no prizes, and you don't
get to see anyone else's code, but as a form of programming
masturbation it's great

http://spoj.sphere.pl/problems/KAMIL/

is another program-size task, but this one counts all bytes.