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tokitsukaze's blog

By tokitsukaze, 4 months ago, In English
 
 
 
 
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By tokitsukaze, 5 months ago, In English

1678A - Tokitsukaze and All Zero Sequence

Idea: tokitsukaze
Prepare: tokitsukaze

Tutorial
Solution
Feedback

1678B1 - Tokitsukaze and Good 01-String (easy version) and 1678B2 - Tokitsukaze and Good 01-String (hard version)

Idea: qsmcgogo-B1, 74TrAkToR-B2
Prepare: tokitsukaze

Tutorial(greedy)
Tutorial(DP)
Solution(greedy)
Solution(DP)
Feedback-B1
Feedback-B2

1677A - Tokitsukaze and Strange Inequality

Idea: tokitsukaze
Prepare: tokitsukaze

Tutorial
Solution
Feedback

1677B - Tokitsukaze and Meeting

Idea: funer
Prepare: tokitsukaze, funer

Tutorial
Solution
Feedback

1677C - Tokitsukaze and Two Colorful Tapes

Idea: qsmcgogo, winterzz1
Prepare: winterzz1

Tutorial
Solution
Feedback

1677D - Tokitsukaze and Permutations

Idea: dark_light, FreshP_0325
Prepare: dark_light

Tutorial
Solution
Feedback

1677E - Tokitsukaze and Beautiful Subsegments

Idea: Frank_DD
Prepare: Frank_DD

Tutorial
Solution
Feedback

1677F - Tokitsukaze and Gems

Idea: dark_light
Prepare: dark_light

Tutorial
Solution
Feedback

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By tokitsukaze, 5 months ago, In English

Hello, Codeforces! ฅ(*`ω´*)ฅ

We are glad to invite you to take part in Codeforces Round #789 (Div. 1) and Codeforces Round #789 (Div. 2), which will be held on May/08/2022 17:35 (Moscow time).

The round will be rated for all participants from both divisions. Participants in each division will be offered 6 problems and 2 hours to solve them. Both divisions will share 4 problems.

The problems were written and prepared by funer, dark_light, FreshP_0325, Frank_DD, qsmcgogo, winterzz1, Heltion, TomiokapEace and me.

Thank to:

Here are some things I personally want to say. This is my second round. Three years have passed since the first round round 573 I held. Now I have graduated and worked. I like codeforces very much. Though I have already participated in work, haven't trained for a long time, my ability has degraded a lot, I will still come to codeforces to participate in the contest in my spare time. This time I also prepared some problems to propose a round, but for some reasons, most of them were rejected. In particular, one of my favorite problems was rejected because "many testers don't like it". I'm a little frustrated, but I also understand that the coordinator's job is to make the round better and more people like this round. I think it's a great honor to prepare round on codeforces and let so many people around the world try to solve the problem I prepared. I will accumulate some more interesting ideas for the next round and try to make more people like the problems I prepared.

I'd like to express my great gratitude to my friends for preparing this round with me, I don't think I can prepare this round alone without them. I really appreciate having the support of my good friends in my round.

In addition, the three naughty cats mentioned in the statement.(*=`ω´=)ノ I understand that I shouldn't post pictures irrelevant to the statement, so I post it here ↓

meow 0w0

Finally, I hope you like the problems in this round, good luck and have fun!(≧ω≦)/

The score distribution will soon be published.

UPD1: Although our coordinator allows to post the PDF of Chinese statements in the contest material, it seems that codeforces does not allow it. We are only allowed to post something after the round. So we will still post Chinese tutorials after the round.

UPD2: List of contributors is a bit changed, and the score distribution will be:

  • Div.2: 500 — (750 + 1000) — 1250 — 2000 — 2000 — 2750

  • Div.1: 500 — 1250 — 1250 — 2000 — 2500 — 3500

UPD3: Note that the score of the last problem of Div.1 has changed, 4000 → 3500.

UPD4: Editorial is out, and Chinese Tutorial will soon be published.

UPD5: Chinese Tutorial is out.

UPD6: Congratulations to the winners!

Div.1:

  1. maroonrk

  2. tourist

  3. eecs

  4. ainta

  5. duality

Div.2:

  1. Kakki_Haruka

  2. WA_On_Pretest2_Forces

  3. ouql

  4. KroosTheKeenGlint

  5. jialiang250

Read more »

 
 
 
 
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By tokitsukaze, 3 years ago, In English

1191A - Tokitsukaze и улучшение

Idea: tokitsukaze

Tutorial
Solution (by Claris)
Solution (by tokitsukaze)

1191B - Tokitsukaze и маджонг

Idea: tokitsukaze, 2014CAIS01

Tutorial
Solution (by skywalkert)
Solution (by isaf27)

1190A - Tokitsukaze и выбрасывание вещей / 1191C - Tokitsukaze и выбрасывание вещей

Idea: tokitsukaze

Tutorial
Solution (by tokitsukaze)

1190B - Tokitsukaze, CSL и игра с камнями / 1191D - Tokitsukaze, CSL и игра с камнями

Idea: tokitsukaze

Tutorial
Solution (by tokitsukaze)
Solution (by skywalkert)

1190C - Tokitsukaze и дуэль / 1191E - Tokitsukaze и дуэль

Idea: teitoku, winterzz1

Tutorial
Solution (by quailty)
Solution (by skywalkert)
Solution (by winterzz1)

1190D - Tokitsukaze и странный прямоугольник / 1191F - Tokitsukaze и странный прямоугольник

Idea: tokitsukaze

Tutorial
Solution (by tokitsukaze)
Solution (by winterzz1)

1190E - Tokitsukaze и взрыв

Idea: chenjb, Subconscious

Tutorial
Solution (by chenjb)
Solution (by quailty)

1190F - Tokitsukaze и степени

Idea: skywalkert

Tutorial
Solution (by skywalkert)
Solution (by quailty)

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By tokitsukaze, 3 years ago, In English

What do you do on Friday evening? Are you busy? Will you take part in our round?

Hello, Codeforces!

We are glad to invite you to take part in Codeforces Round #573 (Div. 1) and Codeforces Round #573 (Div. 2), which will be held on Jul/12/2019 17:35 (Moscow time).

The round will be rated for all participants from both divisions.Participants in each division will be offered 6 problems and 2 hours (to be determined) to solve them. Both divisions will share 4 problems.

The problems were written and prepared by 2014CAIS01, tender, teitoku, winterzz1, chenjb, Subconscious, Claris, quailty, skywalkert and me.

Thank to:

If you are not busy, please take part in our round on Friday evening! We wish you good luck and high rating!

The score distribution will soon be published.

UPD1: Some of authors will be at the Discord CP Community to discuss the problems after the coding phase. However, please follow the rules and don't discuss the problems before or during the contest by any means.

UPD2: List of contributors is a bit changed, and the scoring distribution will be:

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

  • Div.1: 500 — 1000 — 1500 — 1500 — 2250 — 2750

UPD3: Sorry for forcing you to spell our nicknames, 'tokitsukaze' and 'quailty', and some ambiguity in the statements. Anyway, we sincerely appreciate your participation.

UPD4: Editorial

UPD5: Congratulations to the winners!

Div.1:

  1. Um_nik

  2. Benq

  3. ATS

  4. tmwilliamlin168

  5. wiwitrifai

Div.2:

  1. RannRu

  2. cyy233cnbb

  3. AnandOza

  4. puppies_and_rainbows

  5. calabash_fool

Read more »

 
 
 
 
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