tl;dr
And only one guy could solve this :D

Each sentence in problem statement makes sense, it can't be reduced.
There are three author solutions, but two other guys didn't submit them.
BTW, I don't think that this problem so difficult, try to solve it.

P.S. "Условие задачи" = "Problem statement", "condition" - условие, которое может быть истинным или ложным

Edited by author 14.12.2013 18:41