materials that contain signs of such discussions, be prepared for read-only mode and other, . I believe, I hope, that science will soon be able to tackle this disease. But for now, this, Focus on our competitions, not on global issues, will help me personally continue tobe engaged in, Hello, Codeforces. Friends. I apologize, but today I will be a bit chaotic and mix personal with, I apologize, but today I will be a bit chaotic and mix personal with public. It just happened that

astounding journey of you trying to be better, trying to achieve the best of what you can imagine. Hope, you trying to be better, trying to achieve the best of what you can imagine. Hope that my efforts

to decide everything as the leader of the writers' team, and tried to make what I consider tobe the, /motivation to keep the top form and be prepared to win the next contest. I think I've done

/entry/65002) supported by XTX Markets. The rounds are open for everybody, the rating willbe updated, The round will be perfectly balanced. As all things should be., The round will last for 2 hours 30 minutes, 8 problems are waiting for you, and one of them willbe

[contest:1604] which will be held on [contest_time:1604]. This round is rated for both divisions, best and not quitting. You will eventually be happy , estimated before the contest, although didn't think that it would be this accurate., I am super excited to invite you to participate in [contest:1603] and [contest:1604] which willbe, You will be given $6$ problems in each division and $2$ hours to solve them. All the problems are

the `setTestCase` feature, then this improvement can be applied to this problem. Of course, it, . If a validator is used using the `setTestCase` feature, then this improvement canbe applied to, Of course, it would be cool to have similar highlighting in example outputs as well. And even, say

Let $ans[x][y]$ be if interval $[x,y]$ is good as the input data demands., The maximum can always be achieved in the center position of one day's, both endpoints are deleted. In particular, there must be at least two adjacent vertices deleted with, compose an interval. Let $[L_i,R_i]$ be the connected component vertex $i$ in., have the same structure and can be computed easily (to avoid using floating point numbers, one can, is simple. We shall select the first $i$ columns to be white and the first $j$ rows tobe white, should be like:, the number of edges whose both endpoints are deleted. In particular, there must be at least two, $I$'s connectivity will not be influenced., ,b]$ must be connected., Each cell can be visited at most $1000$ times, whoever cannot move loses., If $n$ is odd, there must be some $\lfloor \frac{a_i}{m} \rfloor \geq 3$. In this case, you can, It turns out that the condition is exactly the same even if each vertex can be visited at most, It's easy to see that $da[i]$ and $db[i]$ are non-increasing, so they can be calculated in $O(n+m, Let $I=[a,b]$ not be connected before performing the operation on $[x, y]$ and become connected, Let $res[x][y]$ be if interval $[x,y]$ is good in our answer tree., Similar, the boundaries can be vertical lines, but horizontal lines and vertical lines can not, Since $[x,y]$ has been merged into a larger connected component, then there must be a series of, So the pattern should be row stripes all with at least $2$ rows or column stripes all with at least, So, if we erase one vertex and $|M|$ remains unchanged, then $|I|$ must be changed and vice versa., The version of this game where each vertex can be visited exactly once is known. If both players, This can be calculated efficiently using prefix sums.

I am pleased to invite you to participate in [contest:1503] and [contest:1504]! You willbe given, The score distribution will be announced immediately because you deserve it ❤️:, be given **6 problems** and **2 hours 15 minutes** to solve them. I'm happy to announce the theme

I am the coordinator of Round #810. I will be brief and clear.

will be equal to $0$ for display (but it will be equal to $1400$ when calculating rating changes, * The rating of the new account will be equal to $0$ for display (but it will be equal to $1400

$r_j$, then the problem during the round can be solved approximately with probability: $$P_{i,j, problem during the round can be solved approximately with probability:, I hope that now you will be able to do more effective practice, and the process of making new

should be regarded as a symptom of the fact that Codeforces outgrew the youth phase and entered, **UPD 1:** All three of today's rounds will be unrated., Apparently, such an attack should be regarded as a symptom of the fact that Codeforces outgrew the

has grown to be a four-track competition in competitive programming, ML, design, and mobile, would not be possible: [user:PavelKunyavskiy,2021-07-16], [user:KAN,2021-07-16], [user:lperovskaya, Welcome to the [contest:1530] that will start on [contest_time:1530]. It will be a combined rated, You will be given 8 problems and 3 hours to solve them. It is recommended to read all the problems, be a combined rated round for both divisions. This round is a mirror of VK Cup 2021 Elimination

=20180108T1735&p1=3396&ah=2&am=30)). Four important components of Hello 2018 willbe the same as in, But there will also be a substantial difference:, Four important components of Hello 2018 will be the same as in Good Bye 2017:, Problem tutorial can be found [here](http://codeforces.com/blog/entry/56992)., Thanks to everyone without whom this round wouldn't be possible as well: [user:AlexFetisov,2018-01

/%D0%9D%D0%B5%D0%BE%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB%D1%91%D0%BD%D0%BD%D0%BE% D0%B5_%D0%BF%D0%BE%D0, ://ru.wikipedia.org/wiki/%D0%9D%D0%B5%D0%BE%D0%BF%D1%80%D0%B5%D0%B4%D0%B5%D0%BB% D1%91%D0%BD%D0%BD%D0

Codeforces and Polygon platforms. You will be given 2 hours and 30 minutes to solve 9 problems, and we, You will be given 2 hours and 30 minutes to solve 9 problems, and we **highly** encourage you to

operation in completely unexpected places (it never was and should not be). I will work hard to fix it, unexpected places (it never was and should not be). I will work hard to fix it. My recent tests show

secret enter link will be sent to you., situation and ready to make an effort to be prepared for such issues., * Join our telegram channel by the link https://t.me/codeforces_official to read urgent news. *Be, Here are steps you need to do to be ready for unexpected failures:, I spend a lot of time to be ready for such incidents.

solutions is a problem statement in English. Details can be read at the link https://deepmind.com, Apparently, if these accounts would take part in real competitions, then their rating wouldbe, Details can be read at the link https://deepmind.com/blog/article/Competitive-programming-with, In 1997 Kasparov played against (and lost) the supercomputer DeepBlue. Perhaps we willbe

start on [contest_time:1919]. You will be given **8 problems** and **2.5 hours** to solve them. One of, :1919]. You will be given **8 problems** and **2.5 hours** to solve them. One of the problems willbe

solve **6 problems**. The score distribution will be announced closer to the start of the contest, when a final decision on scheduling has been made. It is sad that my contest is delayed, but let'sbe, **. The score distribution will be announced closer to the start of the contest., Of course, this round would not be possible without the help of many people, who I'd like to thank:

divisions. All three rounds will be three hours long, and all three rounds will be rated. The contest "VK, rounds will be three hours long, and all three rounds will be rated., top 20 teams will advance to the final which will be held in July 2017 in Saint Petersburg!, As we're in year 2017, the scoring will obviously be static. The exact scoring distribution willbe, Codeforces will be the main character of most problems. Don't forget that it's useful to read the

](/predownloaded/87/10/87103501beb63b94ea0055be7189376cf5af7016.png)

взял бы, но факт использования , %B8%D0%B8_%D0%BF%D1%80%D0%BE%D1%81%D1%82%D1%8B%D1%85_%D1%87%D0%B8%D1%81%D0%B5%D0 %BB">распределении, %B8_%D0%BF%D1%80%D0%BE%D1%81%D1%82%D1%8B%D1%85_%D1%87%D0%B8%D1%81%D0%B5%D0 %BB">распределении простых

that someday EDU will become a real educational hub for fans of programming competitions. It willbe, I hope that in the future, using the materials in this section, you will be able to gain knowledge

participate in [contest:1554] which will be held on [contest_time:1554]. This round is rated for future, testers, so they deserve the upvotes that they will be begging for in the comments. - The great, I am super excited to invite you to participate in [contest:1554] which will be held on, You will be given $5$ problems and $2$ hours to solve them. All the problems are authored and

have to improve and learn from their mistakes); the latter one, in my opinion, should notbe, participant and a problemsetter allows himself (or herself) to be rude and offensive, then it is, should be responsible for what they are saying or writing, but if your word has some weight in the, the main thing I wanted to state was that insults against anyone should not be acceptable. It's just, your problems, they are shit" and such should be normal on Codeforces, especially when written by, I know that sometimes contests can be frustrating. Sometimes it is the participant's fault, It's not like we can ever get rid of offense and hatred completely; there will alwaysbe people who

%BE-%D0%BA%D1%80%D0%B0%D1%81%D0%BD%D0%BE-%D0%B1%D0%B5%D0%BB%D1%8B%D0%B9_%D1%84% D0%BB%D0%B0%D0%B3

possibly open this opportunity to more users later. The idea is that streamers willbe able to, sidebar on the right, which will be shown to all site visitors., We have embed stream viewing right into the Codeforces interface. It turned out tobe difficult to

**UPD5:** The drain will be adjusted and the scoring will be **500-1000-1500-2000-2750-3000-3500