Monogon's blog

By Monogon, history, 3 weeks ago, In English,

I hope you enjoyed the contest! I will add implementations later.

UPD I've added implementations.

1382A - Common Subsequence

Tutorial

Implementation

1382B - Sequential Nim

Tutorial

Implementation

1382C1 - Prefix Flip (Easy Version)

Tutorial

Implementation 1 Implementation 2

1382C2 - Prefix Flip (Hard Version)

Tutorial

Implementation 1 Implementation 2

1382D - Unmerge

Tutorial

Implementation

1382E - Mastermind

Tutorial

Implementation

1381D - The Majestic Brown Tree Snake

Tutorial

Implementation

1381E - Origami

Tutorial

Implementation

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By Monogon, history, 3 weeks ago, In English,

Hello, Codeforces!

I'm very glad to invite you to Codeforces Round #658 (Div. 1) and Codeforces Round #658 (Div. 2). This contest will take place on Jul/21/2020 17:35 (Moscow time). In both divisions, you will have 2 hours to solve 5 problems (and one subtask). The score distribution will be announced closer to the start of the round.

Huge thanks to:

I've worked hard to ensure the pretests are short and the statements are strong. Remember to only read the problems that you can solve, and may you have the best of luck!

Because I know you all have so many questions, I have compiled an FAQueue

  • Q: Is it rated?
  • A: Yes

UPD Here is the score distribution:

Div. 2: 500 — 1250 — (1000 + 1000) — 2250 — 3000

Div. 1: (500 + 500) — 1500 — 2000 — 2500 — 3000

UPD Editorial

UPD I filled in the answer to the FAQ. Also, congrats to the winners!

Div. 2:

  1. badger_champion

  2. Mai_madarchod_hu

  3. rulai

  4. Vimmer

  5. niynip

Div. 1:

  1. Benq

  2. Um_nik

  3. KAN

  4. Petr

  5. ksun48

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By Monogon, history, 3 months ago, In English,

Hello, Codeforces!

I'm very glad to invite you to Codeforces Round #639 (Div. 1) and Codeforces Round #639 (Div. 2). This contest will take place on May/06/2020 17:35 (Moscow time). In both divisions, you will have 2 hours 15 minutes to solve 6 problems. 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:

I've done my best to write clear problem statements and strong pretests. Don't forget to read all problems, and I hope you enjoy the round. Good luck!

Because I know you all have so many questions, I have compiled an FAQ:

  • Q: Is it rated?
  • A: Yes.

UPD

Here is the score distribution.

Div. 1: 500 — 1000 — 1500 — 1750 — 2500 — 2500

Div. 2: 500 — 1000 — 1500 — 2000 — 2500 — 2750

UPD Unfortunately, this contest is delayed due to problems in the Codeforces system. It is temporarily scheduled, but I will update this announcement when a final decision on scheduling has been made. It is sad that my contest is delayed, but let's be grateful that the issue was detected early instead of arising in the middle of the round. On the bright side, this may be the earliest announced score distribution in Codeforces history.

UPD The final decision on scheduling is to keep it as is. The contest will take place on May/06/2020 17:35 (Moscow time).

UPD Unfortunately due to the long queue and other issues, the contest is unrated. There was also a bug that gave us trouble in answering your questions. I'm sorry if you asked a question that went unanswered for a long time. I promise we did our best to answer as many questions as we could! Despite all the problems, I hope you enjoyed the problemset!

UPD Editorial

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By Monogon, history, 3 months ago, In English,

1345A - Puzzle Pieces

Tutorial

1345B - Card Constructions

Tutorial

1345C - Hilbert's Hotel

Tutorial

1345D - Monopole Magnets

Tutorial

1345E - Quantifier Question

Tutorial

1345F - Résumé Review

Tutorial

1344E - Train Tracks

Tutorial

1344F - Piet's Palette

Tutorial

Read more »

Tutorial of div2 B-C #1
 
 
 
 
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