FieryPhoenix's blog

By FieryPhoenix, 13 days ago, In English

1515A - Phoenix and Gold

Idea: FieryPhoenix

Tutorial
Solution

1515B - Phoenix and Puzzle

Idea: FieryPhoenix

Tutorial
Solution

1515C - Phoenix and Towers

Idea: FieryPhoenix

Tutorial
Solution

1515D - Phoenix and Socks

Idea: FieryPhoenix

Tutorial
Solution

1515E - Phoenix and Computers

Idea: FieryPhoenix

Tutorial
Solution

1515F - Phoenix and Earthquake

Idea: dragonslayerintraining

Tutorial
Solution

1515G - Phoenix and Odometers

Idea: dragonslayerintraining

Tutorial
Solution

1515H - Phoenix and Bits

Idea: dragonslayerintraining

Tutorial
Solution

1515I - Phoenix and Diamonds

Idea: dragonslayerintraining

Tutorial
Solution

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By FieryPhoenix, 2 weeks ago, In English

Hi!

On May/02/2021 17:35 (Moscow time), we will host Codeforces Global Round 14.

This is the second round of the 2021 series of Codeforces Global Rounds. The rounds are open and rated for everybody.

The prizes for this round:

  • 30 best participants get a t-shirt.
  • 20 t-shirts are randomly distributed among those with ranks between 31 and 500, inclusive.

The prizes for the 6-round series in 2021:

  • In each round top-100 participants get points according to the table.
  • The final result for each participant is equal to the sum of points he gets in the four rounds he placed the highest.
  • The best 20 participants over all series get sweatshirts and place certificates.

Thanks to XTX, which in 2021 supported the global rounds initiative!

All problems were written and prepared by me FieryPhoenix and dragonslayerintraining.

Huge thank you to everyone who made this round possible:

You will have 3 hours to solve 9 problems. Scientific studies have shown irrefutable evidence that upvoting this blog and participating in this round will lead to longevity and happiness. GLHF!

UPD: The scoring distribution is 500 — 1000 — 1500 — 2000 — 2750 — 3250 — 3500 — 4250 — 5000

UPD: Editorial is here!

UPD: Congratulations to the winners!!

  1. Radewoosh
  2. ksun48
  3. Um_nik
  4. Benq
  5. yhx-12243
  6. tourist
  7. duality
  8. jiangly
  9. LJC00118
  10. NotaMotuaQAQ

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Announcement of Codeforces Global Round 14
 
 
 
 
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By FieryPhoenix, 12 months ago, In English

Hi Codeforces!

I’m thrilled to invite you to Codeforces Round #638 (Div. 2), which will take place on May/01/2020 17:35 (Moscow time). It's rated!

There will be 6 problems, and you will have 2.5 hours to solve them. All the problems are written and prepared by me.

Huge thank you to everyone who made this round possible:

I hope everyone will enjoy the problems! I have tried to make short statements and strong pretests. Hopefully this contest will be even better than my previous one :)

UPD: Thanks also to darnley for proofreading statements and suggestions!

UPD: The scoring distribution is standard: 500 — 1000 — 1500 — 2000 — 2500 — 3000

UPD: Editorial is here

UPD: Congratulations to the winners! I hope most of you enjoyed the round. If you have any questions, feel free to ask in the comments.

Overall Winners:

  1. dreamoon_love_AA

  2. KrK

  3. peti1234

  4. antontrygubO_o

  5. I_love_Tanya_Romanova

Div 2. Winners:

  1. 5times187

  2. czyarl

  3. NishimiyaShouko

  4. PureVessel

  5. 5ylas

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By FieryPhoenix, 13 months ago, In English

1348A - Phoenix and Balance

Tutorial
Solution

1348B - Phoenix and Beauty

Tutorial
Solution

1348C — Phoenix and Distribution

Tutorial
Solution

1348D - Phoenix and Science

Tutorial
Solution

1348E - Phoenix and Berries

Tutorial
Solution

1348F - Phoenix and Memory

Tutorial
Solution 1
Solution 2

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By FieryPhoenix, 15 months ago, In English

Moo! (Hello Codeforces!)

I’m very excited to invite you to Codeforces Round #621 (Div. 1 + Div. 2), which will take place on Feb/17/2020 18:35 (Moscow time).

In this round, you will be helping Farmer John and his prized cow Bessie cowmplete some fun tasks.

The contest will have 7 problems and is combined and rated for both divisions. The duration is 2 hours and 15 minutes. The problems are prepared by me (FieryPhoenix) and dragonslayerintraining. We tried very hard to make them interesting and hope that you will enjoy them too!

This round would not have been possible without the wonderful coordination by adedalic and cdkrot. Thank you so much to the testers as well for all the invaluable advice: tmwilliamlin168, walnutwaldo20, nikolapesic2802, bfs.07, Rods, lynmisakura, JustasLe, and hocky. As always, thanks to MikeMirzayanov for the best systems Codeforces and Polygon.

Good luck and more importantly, have fun and learn something new!

UPD: The scoring distribution is 500 — 1000 — 1500 — 2000 — 2500 — 3000 — 3500

UPD: Editorial

UPD: Thank you for participating! Huge congratulations to the winners!

  1. Retired_MiFaFaOvO

  2. 300iq

  3. ohweonfire

  4. yosupo

  5. ksun48

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By FieryPhoenix, 15 months ago, In English

1307A - Cow and Haybales

Idea: FieryPhoenix

Tutorial
Solution
Alternative O(n) Solution:

1307B - Cow and Friend

Idea: dragonslayerintraining

Tutorial
Solution

1307C - Cow and Message

Idea: dragonslayerintraining

Tutorial
Solution

1307D - Cow and Fields

Idea: FieryPhoenix

Tutorial
Solution

1307E - Cow and Treats

Idea: FieryPhoenix

Tutorial
Solution

1307F - Cow and Vacation

Idea: FieryPhoenix

Tutorial
Solution

1307G - Cow and Exercise

Idea: dragonslayerintraining

Tutorial
Solution

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