Hi there!
Me - Sergey Vedernikov - is the author of today's CF beta round.
During the round you'll assist far away kingdom citizens in solving everyday problems, and sometimes - just to fight for your survival.
This round is "red" =), therefore the problems should not appear too difficult, and you should get pleasure from solving them.
To those who know Russian language I recommend to read problem statements in Russian. Not because of the quality of translation - English just poorly communicates Russian folklore language style.
Finally I want to thank Artem Rakhov for invaluable help during the round preparation, Maria Belova for the qualitative translation of the problems, Mikhail Mirzayanov for excellent CF system and all participants for not leaving this event without your attention.
More AC verdicts and high rating to all of you! gl & hf
UPD: Unfortunately, problem B (div. 1) / D (div. 2) appeared to be more difficult, and author's solution appeared wrong. The round will be unrated. I apologise for this to all participants.
2. Create a meme
3. Become orange back
4. ???????
5. PROFIT
> Fall to violet
Fail to violet ;)
Так вот, при добавлении ссылки на этот пост умный Гугл выбирает заодно и картинку выше.
(в предыдущей правке скрин, но более подходящее ему место в этой теме: http://mirror.codeforces.com/blog/entry/2278)
>Am I missing something here?
Yes:
Sarcasm
This is English thread.
haha lose
ок, Шеф
Use Arrays.sort!
Looking forward to the tutorial :P.
i doubt there was not such case , so many solutions will fail.
there are 720 permutations of 6 colors, and 24 equivalent positions for a cube.
It would therefore need 720*24 checks. It's low.
front - 1 from 4 which have the same bottom.
It's a group isomorphic to S4.
A rotation of the cube corresponds to a permutation of the four diagonals.
it sounds a little too difficult for me.<I know very little of this isomorphism>
I did 720 permutation but lost track how to do the rotations <24>.
can anyone give me some links where I can get these 24 positions or how can i do it?
Thanks for your help again.
Actually you can use the stupid approach: Just brute force over the 4x4x4 ways to spin the dice in the X, Y, and Z axis.
24 step :
0:
Déjà vu
I was able to hack a solution just because the participant didn't put '.' after
anyway good luck for tomorrow's TCO then :D
shorter problem description with no translation error would be nicer.
good & balanced problem set will be even better.
I look forward to it.
for me "red" means hard but unrated with pretty large stories.