By RAD, 12 years ago, translation, In English
We want to congratulate you with a happy new school year with this contest. We wish you excellent marks, easy exams and many Accepted in the contests. Let this year bring you many new and interesting knowledge!

Artem Rakhov and Codeforces team 

P. S. Note that the round will be held on the Codeforces Format Rules. Read the rules before the competition. Good luck!

Read more »

 
 
 
 
  • Vote: I like it
  • +13
  • Vote: I do not like it

By Nedy88, 12 years ago, In English
Hello everybody,

Codeforces Beta Round #26 will be held on Monday, the 16th of August, at 19:00 MSK. It will be Codeforces format round, and if all goes well it will be rated. Authors of the problems are Artem Rakhov and me. Thanks to Mike Mirzayanov and Dmitry Matov for help in organizing it. Also thanks to Julia Satushina for translation of problems.

Good luck, see you on the round!

UPD: The contest is over, thank you to everyone for participating.

Read more »

 
 
 
 
  • Vote: I like it
  • +35
  • Vote: I do not like it

By RAD, 12 years ago, translation, In English

Welcome to Codeforces Beta Round #25 (Div. 2)


Authors of today's round problems are Mike Mirzayanov and me. I want to thank to Dmitry Levshunov for technical assistance in organizing the contest, as well as Gerald Agapov and Nikolay Kuznetsov for writing alternative solutions.


I wish you all good luck!


UPD: The contest is over, thank you to everyone for participating.

Read more »

 
 
 
 
  • Vote: I like it
  • +35
  • Vote: I do not like it

By Egor, 12 years ago, translation, In English

Task A

This is pretty simple task - we have cycle and must direct all edges on it in one of 2 directions. We need to calculate cost of both orientation and print smallest of them.
There is a small trick - we can calculate cost of only one orientation and then cost of the other will be sum of costs of all edges minus cost of first orientation.

Read more »

 
 
 
 
  • Vote: I like it
  • +24
  • Vote: I do not like it

By Nedy88, 12 years ago, In English
Hey everybody,

Wellcome to Codeforces Beta Round #24. I'm author to most of the problems today. Something about me: My name is Nedyalko Prisadnikov and I'm a student from Sofia University in Bulgaria. Here are some pictures of me. Many thanks to Mike Myrzayanov and to Artem Rakhov for organizing the contest, writing alternative solutions and some of the problems.

Good luck and have fun!

UPD:

Read more »

Announcement of Codeforces Beta Round #24
 
 
 
 
  • Vote: I like it
  • +58
  • Vote: I do not like it

By RAD, 12 years ago, translation, In English
Hi everybody

Today the author of the majority of problems is Dmitry Zhukov, many thanks to him for this. 
Also I want to thank Mike Mirzayanov for choosing problems for the contest and organizing it and Julia Satushina for the translation of the statements.

Good luck!

UPD:

Read more »

Announcement of Codeforces Beta Round #23
 
 
 
 
  • Vote: I like it
  • +25
  • Vote: I do not like it

By iakolzin, 12 years ago, translation, In English

Contest discussion

Problem А. Second Order Statistics

Sorting

In this problem one should find a minimal element from all elements, that are strictly greater, then the minimal one or report that it doesn't exist. Of course, there can be a lot of different solutions, but one of the simplest - to sort the given sequence and print the first element, that's not equal to the previous. If all elements are equal, then the required element doesn't exist.

Read more »

 
 
 
 
  • Vote: I like it
  • +32
  • Vote: I do not like it

By RAD, 12 years ago, translation, In English

Welcome all to Codeforces Beta Round #22

Note that at this time registration is possible during the round. The contest will begin at 19:00 MSK.

Today I am an author of the problems. I would like to thank Mike Mirzayanov for help in contest preparations, Edvard Davtyan and Nickolay Kuznetsov for writing the verification solutions, and Julia Satushina for translating statements into English.

Good luck on the contest!

UPD: The contest is over. Thank you all for participating!
Problems
Results
Winner Kasparyanm_Mihail gains +203 to rating after the contest!

Read more »

 
 
 
 
  • Vote: I like it
  • +23
  • Vote: I do not like it

By MikeMirzayanov, 12 years ago, translation, In English
I invite you to participate:) Round will be non-rated, but there will not be limited registration at this time! Please, read the rules before the contest!

Read more »

 
 
 
 
  • Vote: I like it
  • +18
  • Vote: I do not like it

By NALP, 12 years ago, translation, In English
Welcome to Codeforces Beta Round #19.

Authors of today's contest are Artem Rakhov and me. Thanks to Mike Mirzayanov, Edvard Davtyan and Julia Satushina for help in the organisation.

I hope, you will have fun.

Good luck!


P.S. After start of the contest, you can download the statements:

English

Russian

UPD. The contest has finished and you can see the standings and tasks. The winner and only participant who has solved all the problems is kalinov. Congratulations!

Read more »

Announcement of Codeforces Beta Round #19
 
 
 
 
  • Vote: I like it
  • +46
  • Vote: I do not like it