By tourist, history, 3 days ago, In English,

Enjoy!

A. Balanced Rating Changes
B. Balanced Tunnel
C1. Balanced Removals (Easier)
C2. Balanced Removals (Harder)
D. Balanced Playlist
E. Balanced Binary Search Trees
F. Balanced Domino Placements
G. Balanced Distribution
H. Balanced Reversals

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By kjain1810, history, 17 hours ago, In English,

This blog is to discuss the problems of ICPC India Online round 2019 held today.

I think the online round this year was substantially better than previous years (except for the weak test data of Beautiful OR problem)

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By Cinro_9baka, history, 41 hour(s) ago, In English,
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
Tutorial is loading...

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By kshitij_sodani, history, 23 hours ago, In English,

Today is ICPC in India but still codechef can't get rid of 500 internal server error Contest should be held on cf instead

Edit:Weak test data in SUMOR problem

t=1, n=3, array=20,12,19

20|12|19 = 31 12|19 = 31 19 = 19 31+31+19 = 81 The correct answer is 81. testcases are weak for this question.there are many solution which give 79 and still passes the testcases.

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By Radewoosh, history, 14 hours ago, In English,

Is anybody going to do something with that? Just asking, I don't know if I should prepare for some changes or for choosing only one of them.

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By HNO2, history, 8 hours ago, In English,

Scanning through standings, I saw something strange: Link

Why is it rated for him? It's a Div.2 round but his rating is over 2100.

I think the reason is that the registration of Codeforces Round #593 (Div. 2) was earlier than the rating changes of Codeforces Global Round 5 (he also participated in Codeforces Global Round 5,) and he registered before the rating change. If that is the case, please fix the problem, since it is pretty unfair for him (he lost his Master title in this contest.) Thanks a lot.

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By YouKn0wWho, 21 hour(s) ago, In English,

Let's say we have a polynomial $$$P(x)$$$ in the field modulo $$$(10^9+7)$$$

$$$P(x)=\prod_{i=0}^{n}{(a_i*x^i+b_i)}$$$

For $$$n=10^5$$$ obviously we can't generate the whole polynomial explicitly. But I think maybe we can solve the following problems

  • Find the coefficient of $$$x^k$$$ in $$$P(x)$$$
  • Find the polynomial $$$P(x)\%x^k$$$

I don't how to solve them efficiently. That's why I am asking you guys. How efficiently can you solve the problems for some $$$k$$$?

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By ZeroDeath, 40 hours ago, In English,

Does it count as violating rules? Because he sent me this message during contest. Can you do something about messages like this, MikeMirzayanov?

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By arsijo, 20 hours ago, In English,

Hi everyone,

I am happy to announce that the 2019 Southeastern Europe Regional Contest will take place on October 19 in Bucharest and Vinnytsia at 10 am UTC+3. The link to the live results will be published here after the start of the competition.

Moreover, in the following day, there will be the Grand Prix of Southern Europe based on these problems at 8 am UTC. If you do not participate in it, you will be able to take part in online mirror, which will be available at the same time.

Because of the Grand Prix, we are asking the official contestants not to discuss the problems in public.

After it, we will upload the contest to the gym and publish the editorial.

Good luck!

UPD. SEERC standings.

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By kostka, 10 hours ago, In English,

Round G of Google Kick Start 2019 will start this Saturday (October 19) at 13:30UTC.

Get ready and register now at g.co/kickstart.

 .

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