You have to print one digit after point even if the number is natural.
:))

Now I have only a small problem - I use too much (but not very much) memory.

> You have to print one digit after point even if the number is natural

Accoring to problem statement, it's only your mistake, and I don't think it's really interesting.

> Now I have only a small problem - I use too much (but not very much) memory.

Memory limit is an only problem in 1306.

hmm...
This was my second submited problem in acm.timus.ru , so I didn't know some things about this system. :)
My algorithm was totally correct, and I didn't have any problems with memory limit.

:)
P.S.  I just wanted to help for other inadvertent people who didn't notice this "mistake".

and don't get too serious :))).