Am I right, that expression ((**)*)(**)*) can be understood in two different ways:
({}*){*)} and
({*)*)(*}*) where {} are comments?

FUCK! My friend explained me that a comment can not contain "*)", but it was not mentioned in the statement!!! Now I got AC. Leonid Volkov and Alexey Lysenko, I hate you!

((**)*)(**)*) Answer is NO! Because it's ({}*)){}*), where {} is comment, {} := (**)
((**)*) answer is YES
(*) answer is NO

A comment is always opened by a pair of symbols "(*" and is closed by a pair of symbols "*)"
->
A comment is always opened by a pair of symbols "(*"
A comment is always closed by a pair of symbols "*)"

Problem statement is absolutely clear.