I took part in the live contest yesterday and it is unfair to participate in this contest too. But I have submitted 2 problems only (F and C), which were not solved during that contest. I am sorry.

P.S. Problem C is brilliant. My respect to the author. And I have solved it using less than 1 Mb ;)

P.P.S. I wonder if Mr. Kopeliovich took part in CBOSS yesterday...

I took part in CBOSS yeasterday.
Only 7 problems :(((

I am sorry too... :( But I could not imagine
that only 8 ACs will give second place today!

I only trained to write fast and to get AC from first try.

PS: "less than 1MB" ...but using more than 1 sec of time :)
PPS: Why wonder??

> I only trained to write fast and to get AC from first try.

Me too.

> PS: "less than 1MB" ...but using more than 1 sec of time :)

If I rewrite my code into C++, it will work about 0,6 sec in fact. But I can speed up my solution on Pascal too (while deleting the edge I look though all of them within linear time, but logarithmic time seems to be possible).

> PPS: Why wonder??

"Wonder" means "want to know" ;)