Python Programming Challenges for beginners?

[n00m]

On Nov 28, 8:24 pm, Lie Ryan <lie.1... at gmail.com> wrote:
> Now, this makes me interested. How efficient it would be when len(s) ==
> 10000... might as well write it and see. Take back what I said, give me
> a minute...

... and you can check it here: http://www.spoj.pl/problems/DISUBSTR/
I see there only one (accepted) solution in Python:
http://www.spoj.pl/ranks/DISUBSTR/lang=PYTH%202.5