csacademy's blog

By csacademy, 2 days ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #57 will take place on Saturday, November/18/2017 15:05 (UTC). This round will be a Div. 2, affecting users with a rating below 1800.

Contest format:

  • You will have to solve 5 tasks in 1 hour and 50 minutes.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, history, 6 days ago, In English,

We made a blog post about some of our latest platform improvements, and also were looking for some feedback here:

Platform improvements Nov 2017

The most significant changes are to the task page, so that it's much more streamlined with the workspace, with better usability. Take a look here for instance.

Any feedback is appreciated. :)

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By csacademy, 12 days ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #56 will take place on Wednesday, 08/November/2017 15:05 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have reality as a problem author.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

Prizes

We're going to award the following prizes:

  1. First place: 100$
  2. Second place: 50$

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Later Edit:

Congratulations to the winners:

  1. izban
  2. Radewoosh
  3. V--o_o--V
  4. LHiC
  5. ainta

Also, the editorial has been published. Hope you enjoyed the contest!

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By csacademy, 3 weeks ago, In English,

Hello, Codeforces!

During the past days at CS Academy, we've been working on tweaking the rating algorithm, and now it's finally here! The total range of the rating has increased, and we also changed the cutoffs for the rating colors and, more important, for the divisions. From now on, you'll be rated in a Div. 2 round if your rating is below 1800.

Round #55

We are also going to host a new contest, Round #55 will take place on Wednesday, November/01/2017 16:05 (UTC). This round will be a Div. 2, affecting users with a rating below 1800.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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  • Vote: I like it  
  • +56
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By csacademy, 4 weeks ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #54 will take place on Wednesday, 25/October/2017 15:05 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have khadaev as a problem author.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

Prizes

We're going to award the following prizes:

  1. First place: 100$
  2. Second place: 50$

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +79
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By csacademy, 5 weeks ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #53 will take place on Wednesday, October/18/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +40
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By csacademy, 6 weeks ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #52 will take place on Wednesday, 11/October/2017 15:05 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have HellKitsune as a problem author.

Contest format change

  • The last problem will become visible only 20 minutes after the contest starts.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

Prizes

We're going to award the following prizes:

  1. First place: 100$
  2. Second place: 50$

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 7 weeks ago, In English,

Hello, Codeforces!

The Romanian Master of Informatics is a yearly competition addressed to high school students and organised by the Tudor Vianu highschool in Bucharest, Romania. The format of the contest is the one commonly found in olympiads.

RMI provides a great opportunity for young people to demonstrate their abilities in Informatics, to exchange knowledge and to enhance cross-cultural contacts in high-school education. Coming to RMI 2017, they will have opportunities to make new friends, to visit a friendly country, and to discover the culture of Romania.

CS Academy will host the online mirrors of both competition days. The first contest starts on Thursday, October 05, 11:00:00 UTC, after the onsite competition ends. The problem statements will be available in English.

Contest format

  • You will have to solve 3 tasks in 5 hours.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 7 weeks ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #51 will take place on Wednesday, October/04/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
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By csacademy, 2 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #50 will take place on Wednesday, September/26/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +69
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By csacademy, 2 months ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #49 will take place on Wednesday, 20/September/2017 15:00 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have zscoder as a problem author.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

Prizes

We're going to award the following prizes:

  1. First place: 100$
  2. Second place: 50$

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +128
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By csacademy, 2 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #48 will take place on Wednesday, September/13/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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  • Vote: I like it  
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By csacademy, 2 months ago, In English,

Hello, Codeforces!

The 1st European Junior Olympiad in Informatics is taking place in Sofia, Bulgaria, from September 07 (arrival day) to September 13 (departure day) 2017.

CS Academy will host the online mirrors of both competition days. The second contest starts on Monday, September 11, 11:00:00 UTC, one hour after the onsite competition ends. The round will be unrated on CS Academy.

Contest format

  • You will have to solve 3 tasks in 4 hours.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 2 months ago, In English,

Hello, Codeforces!

The 1st European Junior Olympiad in Informatics takes place in Sofia, Bulgaria, from September 07 (arrival day) to September 13 (departure day) 2017. EJOI is a significant event, a stepping-stone, in the development of the elite of the IT industry in Council of Europe member states.

CS Academy will host the online mirrors of both competition days. The first contest starts on Saturday, September 09, 11:00:00 UTC, one hour after the onsite competition ends. The round will be unrated on CS Academy.

Contest format

  • You will have to solve 3 tasks in 4 hours.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, history, 2 months ago, In English,

The first edition of EJOI (European Junior Olympiad in Informatics) will be taking place in Sofia, Bulgaria.

The first contest will take be on 9 September and the second one on 11 September.

We'll like to wish good luck to all participants attending the competition.

Prior to the competition we held a contest, Junior Challenge, as a preparation for the main contest.

If you're interested in the final standings, you can find them in this blogpost If you have any tips or tricks that might help young contestants, leave them in the comment section of the blogpost.

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By csacademy, 2 months ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #47 will take place on Wednesday, 06/September/2017 15:15 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

This round will be authored by the CS Academy team.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Later Edit:

Congratulations to the winners:

  1. Um_nik
  2. Egor
  3. Radewoosh
  4. anta
  5. uwi

Also, the editorial has been published. Hope you enjoyed the contest!

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By csacademy, 2 months ago, In English,

Junior Challenge is a yearly contest organised by volunteers from the Romanian programming community. You can read more about it in our previous blog post.

The second round takes place on Tuesday, September/05/2017 11:00 (UTC), and it will be unrated.

Contest format:

  • You will have to solve 4 tasks in 4 hours.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

Many thanks to Andrei1998, bciobanu, tamionv, geniucos and george_stelian for authoring and preparing the tasks.

Round #46 (Div. 1.5)

The corresponding Round #46 starts at the same time, on Tuesday, September/05/2017 11:00 (UTC). The round will be rated for everyone with a rating below 1775 (this includes yellows).

Contest format:

  • You will have to solve 6 tasks in 2 hours and 30 minutes.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 3 months ago, In English,

Junior Challenge is a yearly contest organised by volunteers from the Romanian programming community. The contest is addressed to middle school students who want to prepare for the Junior Balkan Olympiad in Informatics, and starting this year, the European Junior Olympiad in Informatics.

This is the first international edition of the contest. There will be two separate competition days, and the rounds will be unrated. The first round takes place on Sunday, September/03/2017 15:00 (UTC).

Contest format:

  • You will have to solve 4 tasks in 4 hours.
  • The first task will be the easiest one, the other three will be in random order.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

Many thanks to Andrei1998, bciobanu, tamionv, geniucos and george_stelian for authoring and preparing the tasks.

Round #45 (Div. 1.5)

In parallel with Junior Challenge, we will organise two CS Academy rounds, that will be rated for everyone with a rating below 1775 (this includes yellows). The CS Academy contests will consist of all the problems in Junior Challenge, plus some extra easy ones. The corresponding Round #45 starts at the same time, on Sunday, September/03/2017 15:00 (UTC).

Contest format:

  • You will have to solve 6 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +129
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By csacademy, 3 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #44 will take place on Wednesday, August/30/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +96
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By csacademy, 3 months ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #43 will take place on Sunday, 27/August/2017 12:00 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have maryanna2015 as a problem author.

Prizes

We're going to award the same prizes as the previous Div. 1 + Div. 2 rounds:

  1. First place: 100$
  2. Second place: 50$
  3. One random prize: 50$.

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Read more »

 
 
 
 
  • Vote: I like it  
  • +76
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By csacademy, 3 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #42 will take place on Wednesday, August/16/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 3 months ago, In English,

Hello, Codeforces!

We're going to host a new contest at csacademy.com. Round #41 will take place on Wednesday, 09/August/2017 15:00 (UTC). This contest will be a Div1 + Div2, with 7 tasks of varying difficulty that need to be solved in 2 hours.

We are glad to have legar as a problem author.

Prizes

We're going to award the same prizes as the previous Div. 1 + Div. 2 rounds:

  1. First place: 100$
  2. Second place: 50$
  3. One random prize, either 50$ or a custom CS Academy T-shirt, whichever the winner wants. :)

Contest format:

  • You will have to solve 7 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

If you find any bugs please email us at contact@csacademy.com

Don't forget to like us on Facebook, VK and follow us on Twitter.

Later Edit:

Congratulations to the winners:

  1. white2302
  2. ksun48
  3. irkstepanov
  4. qwerty787788
  5. shik

And to the random prize winner, Vvalter!

Also, the editorial has been published. Hope you enjoyed the contest!

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By csacademy, 4 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #40 will take place on Wednesday, August/02/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Special prizes

This round will have 3 special prizes consisting of private coaching lessons with our contest coordinator, wefgef. Each lesson will be conducted on Skype and will last for 1 hour and 30 minutes. You can find out more details on the contest page.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 4 months ago, In English,

Hello, Codeforces!

We are going to host a new contest at csacademy.com. Round #39 will take place on Wednesday, July/26/2017 15:00 (UTC). This round will be a Div. 2, affecting users with a rating below 1675.

Special prizes

This round will have 3 special prizes consisting of private coaching lessons with our contest coordinator, wefgef. Each lesson will be conducted on Skype and will last for 1 hour and 30 minutes. You can find out more details on the contest page.

Contest format:

  • You will have to solve 5 tasks in 2 hours.
  • There will be full feedback throughout the entire contest.
  • Tasks will not have partial scoring, so you need to pass all test cases for a solution to count (ACM-ICPC-style).
  • Tasks will have dynamic scores. According to the number of users that solve a problem the score will vary between 100 and 1000.
  • Besides the score, each user will also get a penalty that is going to be used as a tie breaker.

About the penalty system:

  • Computed using the following formula: the minute of the last accepted solution + the penalty for each solved task. The penalty for a solved task is equal to log2 (no_of_submissions) * 5.
  • Solutions that don't compile or don't pass the example test cases are ignored.
  • Once you solve a task you can still resubmit. All the following solutions will be ignored for both the score and the penalty.

Don't forget to like us on Facebook, VK and follow us on Twitter.

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By csacademy, 4 months ago, In English,

The 24th Central European Olympiad in Informatics took place in Ljubljana, Slovenia, during July 10th-15th 2017. The most gifted high school students from 14 countries had the opportunity to prove their knowledge and skills in informatics.

If you didn't participate in the official online mirror and you didn't get the change to read the problem statements yet, we invite you to participate in two unrated contests that will use the tasks from CEOI. The first contest starts on Thursday, July 20, 11:00:00 UTC. The second contest starts on Friday, July 21, 11:00:00 UTC The problem statements will be available in English.

Contest format

  • You will have to solve 3 tasks in 5 hours.
  • There will be full feedback throughout the entire contest.
  • The tasks will have partial scoring. The maximum score for each problem will be 100 points.
  • There will be no tie breaker, so two users having the same total score at the end of the contest will share the same place in the standings.

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