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.
Hey Codeforces community,
have you ever seen any problems that use Wavelet Tree/Matrix or can be solved using these data structures?
Problems created especially for these structures don't count (for example they should appear in some competition).
I noticed that in recent years, a lot of "pass any coding interview"-ads started appearing out of nowhere (or maybe I live under a rock). On the other hand, I worked in many places and talk to many people and no one ever mentioned participating in such courses/bootcamps before. Therefore, I would like to ask if you know any successful stories, where a person went to some programming bootcamp without any prior experience and then started working in some well-known IT company?
We probably all noticed that the rating inflation still occurs .
In several games, there's a thing called "rating decay", when your rating decreases when you don't play ranked games (in our world: if you don't participate in contests). Please compare:
What do you think about implementing such a solution to the Codeforces rating? It should slowly drain some of the unnecessary rating (especially from people who do not participate anymore). Similar to many sources above, I think it should affect only highly rated users (maybe with 2100+ rating?). It can also serve as an encouragement to participate in contests more often.
summer is coming, so can we try to compile a list of participants of the IOI 2019?
The list can be found here: http://weaselcrow.com/pro/cf/ioi/19/
How to add or update data? Please fill the following form: https://forms.gle/ttDuP3SR7b8pqhxU6
Please note that the data is moderated, so it might take some time for your input to be visible.
Last year's post can be found here: https://codeforces.com/blog/entry/58939
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Today the Central European Regional Contest took place in Prague, Czechia.
And are you serious? One of the hardest regionals and:
I have been to several contests before and I understand that organizing such contest might be hard, but I really think that this contest crossed several lines. One of the most traumatic experiences in my life.
as promised, tasks from the last year Polish Olympiad in Informatics are finally translated:
Please ignore Polish titles, if you set the language to English (top right corner), you should see English statements.
I also want to recommend some problems, which (in my opinion) deserve some attention. I won't say why, because I don't want to spoil them, but if you have some spare time, please check out the following problems:
We are aware that the translations are not flawless, please let us know if we've made some mistakes.
I made a thing and I want to share it with the community.
We wanted to keep track of achievements and submissions in our team and using Codeforces status page is not really handy. Therefore, I introduce to you Team dashboard.
Here you can find some kind of a timeline for each member of your team, showing last submissions, contests and even blog posts on Codeforces.
Using this script is pretty easy, just specify up to 3 handles in the address, separated by semicolons (please check below). Also please keep in mind that this script was made in 3-4 hours, so there is almost certainly a handful of bugs. Also, the script asks a lot of queries to the Codeforces API, so sometimes not all requests are answered. You should wait a couple of seconds and try again.
Visit right now and bookmark your team:
You can also compare yourself with your archenemy:
Upd: fixed some bugs, including incorrect places and no response if no one from the team submitted anything.
Upd2: fixed bug with blocked blogs.
Upd3: you can now request as many days as you want, adding d argument, for instance:
Please use it carefully, as requesting too many days will probably timeout.
Upd4: added team rating, as calculated by Codeforces.
Upd5: added problem ratings.
Do you need even more Polish problems in your life? This year we are going to organize some contests on our educational platform (Szkopuł) and we decided to open them to the public. All contests will consist of problems from the previous editions of the POI, so you might be quite familiar with them if you ever solved problems on Szkopuł or on MAIN.
First contests (four of them) will imitate the first stage of the POI. Each contest will consist of three problems, last a week (start at 00:00 CEST on Monday, end at 23:59 CEST on Sunday) and have no feedback during the contest (but you have plenty of time to test your submissions). The first contest will start on September the 10th.
How to register? Just create an account on Szkopuł (https://szkopul.edu.pl/) and click on this invitational link: https://szkopul.edu.pl/c/tren18/join/RMQAKCjHhr1ceqVxywNIU5Kv/
CEOI 2018 is now a part of history!
Task statements, test data, model solutions, translations and some slides with solutions can be found at https://ceoi2018.pl/tasks/
The problems were added on Szkopuł and can be solved there (unfortunately, right now only in C/C++): https://szkopul.edu.pl/p/default/problemset_eng/ceoi/2018
We uploaded some photos to our Facebook fanpage: http://fb.com/ceoi2018
And finally, CEOI 2019 will take place in Bratislava, Slovakia!
The Central European Olympiad in Informatics (CEOI) is an annual informatics competition for secondary school students for central European countries. The 25th CEOI takes place in Warsaw, the capital of Poland.
This year, 13 countries will participate in the CEOI: Austria, Azerbaijan, Croatia, Czechia, Georgia, Germany, Hungary, Italy, Romania, Slovakia, Slovenia, Switzerland, and Poland. The full list of participants is available at: https://ceoi2018.pl/teams/
There will be two competition days: 8/14 and 8/16 (Tuesday and Thursday). We invite everyone to participate in the online mirror, hosted by the CS Academy (details). The contest will start both days one hour after the end of the onsite competition (at 13:00 UTC) and last 5 hours (till 18:00 UTC).
You asked for it and we are trying to deliver! Almost all tasks from the 22nd, 23rd and 24th Polish Olympiad in Informatics are already translated and are available on Szkopuł:
Tasks from the last edition (25th) are being translated.
Please don't be scared of Polish titles, that's because we are trying to unify all problems. The problem statements should be in English. In particular, check if your language is set to English (the flag in the upper-right corner).
Out of all 396 original tasks from all 25 editions of the Polish Olympiad in Informatics, over 83% are available in English right now. I really hope that we can reach 100% later this year to celebrate the 25th birthday of the POI, but I don't want to promise anything.
The famous book with tasks from the polish programming contests can be ordered again. This time the book was printed in a more reasonable amount :)
Update: I just noticed that books cannot be delivered outside Poland. We will do something about this. :P
Update 2: Check out this blog: http://codeforces.com/blog/entry/59876
I know that nearly everyone is looking towards China right now, but let's try (like in a previous year) to create a list of IOI 2018 participants.
The list can be found here: http://weaselcrow.com/pro/cf/ioi/18/
How to add or update data? Please fill the following form: https://goo.gl/forms/he4DlrzfKWw35lx73
Just in a month from today, IOI in Iran will start.
Below you can find the complete list of participants (based on registration and data provided by Codeforces community): http://weaselcrow.com/pro/cf/ioi2017/
Some random facts:
This year IOI will be held in Tehran, Iran between 28th July and 4th August.
Official website: http://ioi2017.org/
Facebook page: ioi2017.org
Check out the new version of this list with sorting and CF rating (updated by CF API):
Feel free to add (confirmed!) participants from your country here: https://goo.gl/forms/4BskHKHmZ70Tdck22 (preferred way) or below, in comments.
This topic is probably as old as programming itself, but maybe someone can help me.
I had an opportunity to organize several camps for some pupils (age 14-16). They were pretty good in mathematics and puzzles in general. My job there was to show them why programming (and algorithms) is also pretty decent.
I show them some problems, teach them basic programming skills, but after several years I noticed that the most important thing in teaching such things is showing them why programming is important and why should they learn this. I should sell them not knowledge, but attitude during this week.
Do you have any idea how to convince younger generations why they should start programming? Why did you start? What is convincing you to still solve algorithmic problems?
Happy New Year and thanks in advance for your responses and ideas :)