Anadi's blog

By Anadi, history, 7 months ago, In English

1466A - Bovine Dilemma

Tutorial
Solution 1
Solution 2
Challenge

1466B - Last minute enhancements

Tutorial
Solution 1
Solution 2
Challenge

1466C - Canine poetry

Tutorial
Solution 1
Solution 2
Challenge

1466D - 13th Labour of Heracles

Tutorial
Solution

1466E - Apollo versus Pan

Tutorial
Solution

1466F - Euclid's nightmare

Tutorial
Solution

1466G - Song of the Sirens

Tutorial
Solution

1466H - Finding satisfactory solutions

Tutorial
Solution

1466I - The Riddle of the Sphinx

Tutorial
Solution

I am really interested in solving this task using fewer queries or proving that $$$3 \cdot (n + b)$$$ is optimal. Does anyone have any idea how to answer these questions?

UPD: There are challenges added to some tasks.

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Tutorial of Good Bye 2020
 
 
 
 
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By Anadi, history, 14 months ago, In English

Hello Codeforces!

We have a pleasure to invite you to Codeforces Round #647 (Div. 1) and Codeforces Round #647 (Div. 2). This round will take place on Jun/04/2020 17:35 (Moscow time). In both divisions, you will have 2.5 hours to solve 6 problems. Three of them will be shared.

The problems for this round were prepared by MicGor, Grzmot, Okrut and me.

We would like to thank everyone who made this round possible:

We hope you will enjoy the problem set! Good luck!

UPD: Score distribution:

  • Div 1: $$$500$$$ $$$-$$$ $$$1250$$$ $$$-$$$ $$$2000$$$ $$$-$$$ $$$2500$$$ $$$-$$$ $$$3000$$$ $$$-$$$ $$$3500$$$
  • Div 2: $$$500$$$ $$$-$$$ $$$1000$$$ $$$-$$$ $$$1500$$$ $$$-$$$ $$$2000$$$ $$$-$$$ $$$2750$$$ $$$-$$$ $$$3500$$$

UPD: Editorial

UPD: Congratulations to the winners!

Div. 1:

Div. 2

Below is a message for you from MikeMirzayanov:

AlgoMuse

With this round, we want to say thank you to Algo Muse for the significant contribution and support!

Algo Muse is an educational site that conducts online algorithmic contests in pen-and-paper style (no coding). It was originally started to help students prepare for theory qualifiers for graduate admissions. At present, the problems have a broader appeal, though occasionally an odd problem may require knowledge of linear algebra, probability, or group theory. The website is maintained by former students of IIT Bombay. To find out more, visit their website or their twitter account.

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By Anadi, history, 16 months ago, In English

XX Open Cup Grand Prix of Wrocław takes place on Sunday, March 29, 2020 at 10:00 CEST.

Link to the contest (you need an Open Cup login to participate).

The round is based on local competitions organized in 2018 and 2019 in Wrocław. Tasks were invented, prepared and translated by gawry, bardek, Arti1990, Rafiki53, Skedar, koratel, Kreyyy, Łukasz Zatorski, Arblash, yarek, MicGor, Maciektoja, w0nsh, kobor, Fly_37 and me.

Good luck!

UPD: There was a wrong time written at the beginning! I got confused because of the time change in Poland and I am deeply sorry about that.

UPD: Editorial

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By Anadi, history, 3 years ago, In English

1043A — Elections

Tutorial
Solution

Author: Anadi

1043B — Lost Array

Tutorial
Solution

Author: Anadi

1043C — Smallest Word

Tutorial
Solution

Author: Anadi

1043D — Mysterious Crime

Tutorial
Solution

Author: Anadi

1043E — Train Hard, Win Easy

Tutorial
Solution

Author: Rzepa

1043F — Make It One

Tutorial
Solution 1
Solution 2

Author: Anadi

1043G — Speckled Band

Tutorial
Solution 1
Solution 2

Author: isaf27

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By Anadi, 3 years ago, In English

I would like to invite you to participate in the rated Codeforces Round #519 by Botan Investments. Date and time of the round: Oct/28/2018 18:35 (Moscow time).

This is a combined round having 7 problems and lasting 2 hours, and it will be rated.

Tasks for you were prepared by Anadi, Grzmot, isaf27 and Rzepa. Also thanks for:

KAN and cdkrot for help in preparing the problems; pavel.savchenkov, Nerevar, map, GR1n, rutsh, AlexFetisov and winger for testing the round; MikeMirzayanov for Codeforces and Polygon platforms.

The round is supported by Botan Investments.

Prizes! Top 50 participants and 20 random participants with rank from 51 to 500 will receive personalized hoodie with CF handle.

Scoring distribution will be announced later. I wish you a high rating and looking forward to see you at the competition!

UPD: I'll be on the community Discord server shortly after the contest to discuss the problems.

UPD: Scoring: 500 1000 1500 2000 2250 2750 3500

UPD: Editorial

The round is over, congratulations to the winners!

  1. scott_wu
  2. mnbvmar
  3. HIR180
  4. ksun48
  5. Benq
  6. geniucos
  7. Alex_2oo8
  8. Petr
  9. Um_nik
  10. V--o_o--V

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