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→ Pay attention

Before contest
Codeforces Global Round 25
3 days
→ Top rated


# User Rating 1 Radewoosh 3611 2 jiangly 3597 3 Benq 3593 4 ecnerwala 3584 5
orzdevinwang 3570 6 cnnfls_csy 3569 7 tourist 3565 8 maroonrk 3487 9 gyh20 3447
10 Rebelz 3409

Countries | Cities | Organizations View all →

→ Top contributors


# User Contrib. 1 maomao90 173 2 adamant 164 3 awoo 162 4 TheScrasse 160 5 nor
159 6 maroonrk 157 7 SecondThread 152 8 pajenegod 146 9 BledDest 144 9 Um_nik
144

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→ Recent actions

 * jeremy_goku → EXPOSING HEAP_OVERFLOW   
 * exhausted → Codeforces Round #936 (Div. 2) Editorial   
 * Kuroni → Codeforces Global Round 25   
 * Fremder → [Invitation, Prizes!] CodeRed and Humblefool Cup 2024 by IIIT
   Allahabad   
 * hocky → TLX Special Open Contest — April Fools 2024!   
 * MikeMirzayanov → Rule about third-party code is changing   
 * mesanu → Codeforces Round 928 (Div. 4) Editorial   
 * unstoppable_N → Invitation to CoDeft 4.0, AIT Pune   
 * Norp → Pupil in 80 days - Day 20   
 * FedeNQ → Teams going to ICPC WF 2023 (Egypt 2023, 2nd final) — WIP List   
 * FedeNQ → Teams going to ICPC WF 2022 (Egypt 2023) — WIP List   
 * KostasKostil → Thanks to the kind presenter for preventing the Ukrainian team
   from being disqualified   
 * birilohy → Lovely funny cheater   
 * ICPCNews → The 2023 Post World Finals Online ICPC Challenge powered by Huawei
     
 * cry → CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)   
 * siplusplus → ICPC WF 2023 Luxor -- Trade for Indomie   
 * Noobish_Monk → How to efficiently count specific regular bracket sequences?
     
 * physical23 → Global Rounds   
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   bitset?   
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 * Zhtluo → The Reason You are Bad at Codeforces — You are Not Russian Enough   
 * flamestorm → April Fools Day Contest 2024 Editorial   
 * Serval → Codeforces Round #853 (Div. 2) Editorial   

Detailed →

The 2023 Post World Finals Online ICPC Challenge powered by Huawei

By ICPCNews, 41 hour(s) ago,


HELLO, CODEFORCES!

The ICPC Challenge World Finals in Luxor is approaching for some of you, and we
are delighted to provide an additional exciting opportunity to compete open to
all!

We are happy to invite you to the 2023 Post World Finals Online ICPC Challenge,
powered by Huawei starting on May 6, 2024 at 15:00 UTC [] and ending on May 20,
2024 at 14:59 UTC.

In this Challenge, you will have a unique chance:

 * to compete with top programmers globally

 * to solve 1 exciting problem prepared by Huawei

 * to win amazing prizes from Huawei!

It is an individual competition.

2023 Post World Finals Online ICPC Challenge powered by Huawei:

Start: May 6, 2024 15:00 UTC

Finish: May 20, 2024 14:59 UTC

We hope you'll enjoy this complex Challenge!

PROBLEM

We are glad to propose to you an exciting challenge “Accuracy-preserving
summation algorithm”, which is prepared by Huawei Computing Product Line.

With this challenge, we focus on summation algorithms of floating point numbers
in different precisions with the goal to use the lowest possible precision
without losing too much of the accuracy of the end result. This problem arises
in high-performance computing as lower precision can be computed faster. At the
same time it also loses accuracy faster and can even lose it completely. Finding
the right balance between fast low precision calculations and higher precision
intermediate summations is a challenging task on modern architectures, and you
would have an opportunity to try addressing this challenge

REGISTER

PRIZES FROM HUAWEI

Rank Prize Grand Prize (Rank 1) € 12 000 EUR + a travel trip to the 49th Annual
ICPC World Finals in a guest role First Prize (Rank 2-10) € 8,000 EUR Second
Prize (Rank 11-30) € 3,000 EUR Third Prize (Rank 31-60): € 800 EUR TOP 200
Participants Souvenir T-shirt * If the allocated Huawei Challenge prize cannot
be delivered to your region for any reason it may be replaced by another prize
(if no legal restrictions), at the discretion of the Sponsor.

CHALLENGE RULES AND CONDITIONS

By participating in this Challenge, you agree to the Challenge Rules and
Conditions of Participation

Good luck, we hope this will be fun!

Full text and comments »

icpcchallenge
 * 
 * +76
 * 


 * ICPCNews
 * 41 hour(s) ago
 * 1


April Fools Day Contest 2024

By AlperenT, 6 days ago,


Hello, April Fools lovers Codeforces!

We, AlperenT, flamestorm, ToxicPie9, and willy108, would like to invite everyone
on Codeforces to April Fools Day Contest 2024! The 12th April Fools Day Contest
will take place on Monday, April 1, 2024 at 16:35UTC+2. This is a joke
competition in which solving the problem is often easier than figuring out what
the actual task is.

In this round, you will be given nn cool bugaboos where
−1≤n≤[REDACTED]−1≤n≤[REDACTED] and 2 hours to solve them. The contest will use
extended ICPC rules (no hacks, the standings are decided by the number of solved
problems and penalty time earned on them). You can submit solutions in any
language allowed by Codeforces, unless the problem says otherwise.

Please note that the round is unrated and that the penalty for a wrong
submission is 10 minutes.

To get an idea of what the contest will look like, you can check out the
contests of the past years: 2012, 2013, 2014, 2016, 2017, 2018, 2019, 2020,
2021, 2022, 2023. (It has been 12 years since the first April Fools Day Contest,
thank you Nickolas!)

Please do not send any clarification requests in the contest, as we definitely
will not be sending funny responses like we did last year.

Good luck, and have fun!

UPD: Editorial is released!

UPD: Congrats to the winners:

 1. tiger2005
 2. emthrm
 3. Enchom
 4. arvindf232
 5. KumaTachiRen

And the first solves on each problem:

 * A: InternetPerson10
 * B: Mr_Buffon
 * C: Thienu
 * D: moraprex
 * E: BalintR
 * F: SanguineChameleon
 * G: 7_divided_by_3
 * H: Owmicron
 * I: Dog_of_zzx
 * J: Joshc

Full text and comments »

Announcement of April Fools Day Contest 2024
contest, april fools day contest
 * 
 * +814
 * 


 * AlperenT
 * 6 days ago
 * 175


CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)

By cry, 6 weeks ago,



HELLO CODEFORCERS!

We are pleased to invite you to participate in CodeTON Round 8 (Div. 1 + Div. 2,
Rated, Prizes!). This round will start on Saturday, March 30, 2024 at 16:35UTC+2
and will be rated for all participants. There will be 88 problems to be solved
in 33 hours, with one divided into two subtasks. Similar to USACO, you will help
Farmer John and his cows resolve a series of first world problems. Be there or
be square.

This round was cooked up by smax, sum, oursaco, cry, and buffering.

We would like to thank the following people for making the round possible:

 * Our favorite cherry TheScrasse for the wonderful and speedy coordination.

 * Our MVP testers, Benq, Geothermal, and rainboy, for dedicating so much time
   to reviewing problems, providing essential feedback, and perfecting the
   problemset.

 * The rest of our testers for their unparalleled efforts: errorgorn, rqi,
   hyforces, LipArcanjo, MridulAhi, omeganot, darkkcyan, Phi-001, awesomeguy856,
   JagguBandar, camc, drdilyor, lethan3, rohit2593, willy108, WAtoAC2001,
   jay_jayjay, -1e11, evenvalue, lunchbox, kaztayev, kondasujay2, maxrgby,
   htetgm, thehunterjames, GlassesNerd, SunShine11, wozhenshuai, chromate00,
   I_FloPPed21, MrPavlito, priyanshu.p, ETL, yash_9a3b, Aurora__, nelsi_sousa,
   susvant, and myvaluska.

 * Alexdat2000 for translating the statements to Russian.

 * MikeMirzayanov for developing Codeforces and Polygon, or else this contest
   literally wouldn't exist.

 * You, for participating!

SCORE DISTRIBUTION:

500−1000−(1250+750)−2250−2500−3000−3000−4500500−1000−(1250+750)−2250−2500−3000−3000−4500

EDITORIAL

Congratulations to our Winners and First Solves!

Top 5:

 1. maroonrk

 2. Radewoosh

 3. ecnerwala

 4. cnnfls_csy

 5. orzdevinwang

First Solves:

A. A_G
B. jiangly
C1. ksun48
C2. turmax
D. Omer223
E. tourist
F. Radewoosh
G. tourist
H. ecnerwala

And here is the information from our title sponsor:



Hello, Codeforces!

We, the TON Foundation team, are pleased to support CodeTON Round 8.

The Open Network (TON) is a fully decentralized layer-1 blockchain designed to
onboard billions of users to Web3.

Since July 2022, we have been supporting Codeforces as a title sponsor. This
round is another way for us to contribute to the development of the community.

The winners of CodeTON Round 8 will receive valuable prizes.

The first 1,023 participants will receive prizes in TON cryptocurrency:

 * 1st place: 1,024 TON
 * 2–3 places: 512 TON each
 * 4–7 places: 256 TON each
 * 8–15 places: 128 TON each
 * …
 * 512–1,023 places: 2 TON each

We wish you good luck at CodeTON Round 8 and hope you enjoy the contest!

Full text and comments »

Announcement of CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
 * 
 * +491
 * 

 * cry
 * 6 weeks ago
 * 170


Codeforces Round 937 (Div. 4)

By flamestorm, 7 days ago,


Hej, Codeforces!

mesanu, SlavicG and I are very excited to invite you to Codeforces Round 937
(Div. 4)! It starts on Thursday, March 28, 2024 at 16:45UTC+2.

The format of the event will be identical to Div. 3 rounds:

 * 5-8 tasks;
 * ICPC rules with a penalty of 10 minutes for an incorrect submission;
 * 12-hour phase of open hacks after the end of the round (hacks do not give
   additional points)
 * after the end of the open hacking phase, all solutions will be tested on the
   updated set of tests, and the ratings recalculated
 * by default, only "trusted" participants are shown in the results table (but
   the rating will be recalculated for all with initial ratings less than 1400
   or you are an unrated participant/newcomer).

We urge participants whose rating is 1400+ not to register new accounts for the
purpose of narcissism but to take part unofficially. Please do not spoil the
contest for the official participants.

Only trusted participants of the fourth division will be included in the
official standings table. This is a forced measure for combating unsporting
behavior. To qualify as a trusted participant of the fourth division, you must:

 * take part in at least five rated rounds (and solve at least one problem in
   each of them),
 * do not have a point of 1400 or higher in the rating.

Regardless of whether you are a trusted participant of the fourth division or
not, if your rating is less than 1400 (or you are a newcomer/unrated), then the
round will be rated for you.

Thanks a lot to the testers: erekle, vladmart, nskybytskyi, Vladosiya,
KrowSavcik, Dominater069, LucaLucaM, MADE_IN_HEAVEN, tvladm, nor.

We suggest reading all of the problems and hope you will find them interesting.
Good luck!

UPD: The round is delayed by 10 minutes:
https://codeforces.com/blog/entry/127616?#comment-1133556.

UPD: The editorial is posted!

Full text and comments »

Announcement of Codeforces Round 937 (Div. 4)
div4
 * 
 * +142
 * 

 * flamestorm
 * 7 days ago
 * 191


TON Tact Smart Challenge #2

By Una_Shem, history, 8 days ago,


Update: TON Tact Smart Challenge #2 has been postponed. More information here.

Please note: CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!) will take place
as scheduled. We will be glad to see you among the participants!



Hello, Codeforces!

Have you heard about TON Tact Smart Challenge #2? It's an amazing competition
organized by our title sponsor, the TON Foundation in their ecosystem.

This challenge is designed to engage participants in creating a decentralized
social network prototype utilizing the Tact smart contract language. The project
consists of five stages, each aimed at implementing a core feature of the social
network, from user profiles to decentralized management.

We encourage the Codeforces community to participate in this contest. Dive deep
into the world of TON Blockchain and explore the limits of what's possible.

Challenge starts on March 25, and lasts until April 3. To enter the challenge,
register through @smartchallengebot. You'll receive all the essential details,
including start times, submission guidelines, and insights into the challenge
stages.

For more information, visit this page.

TON Tact Smart Challenge #2 →

The scoring system is simple:

Each stage can bring you a max of 6 points. You get 5 points for solving a
stage. You get an extra point if you solve it without using any gas.

Minimum amount of points to be eligible for the prize is 6 points.

Prizes:

 * $7,000 in TON — The top 15% of eligible participants
 * $7,000 in TON — The middle 30% of eligible participants
 * $6,000 in TON — The bottom 55% of eligible participants

Impressive, right? Hurry up and join!

Good luck!

Full text and comments »

 * 
 * +138
 * 

 * Una_Shem
 * 8 days ago
 * 15


European Championship 2024 (EUC)

By dario2994, 2 weeks ago,


The European Championship 2024 will take place on the 24th of March in Prague.
The top teams from the European ICPC regionals CERC, NWERC, SEERC, SWERC will
compete for the title of European champions. It is the first edition of this
ICPC super-regional.

The mirror contest European Championship 2024 - Online Mirror (Unrated, ICPC
Rules, Teams Preferred) will be held on Codeforces at Sunday, March 24, 2024 at
12:00UTC+2 and will last 5 hours.

The mirror contest will contain the same problems as the official competition.

I am the chief judge for the competition and I want to thank:

 * The amazing set of judges who proposed and prepared the problems:
   antontrygubO_o, bicsi, Giove, Martin Kacer, MZuenni, Petr.
 * Our beloved tester ksun48 who showed us that our perception of the
   difficulties was not exactly spot on...
 * Our beloved proofreader Philae for proofreading the statements.
 * Everyone involved in the organization of EUC. In particular our director Boba
   Mannová, and Fernando Silva, Václav Herman, Ondřej Votava, Jan Kubr, Jan
   Baier.
 * The developers of DOMjudge, the contest system used in the official contest.
 * MikeMirzayanov for Polygon (that we used to prepare the problems) and for
   letting us host the mirror on Codeforces.

I invite you to participate in the contest and I hope that you will like the
problems.

On the difficulty
The contest features problems with difficulties from div1A to div1E. It should
be enjoyable for many, and challenging even for the strongest teams in the
world.

Rules


 1. The contest is unrated, so your codeforces rating will not be affected.
 2. The scoring is ICPC-style: teams are first sorted by number of problems
    solved, then the time-penalty is used as a tie-break. An incorrect
    submission gives a 20 minutes penalty.
 3. We encourage participation as a team.
 4. If you are participating in a team, we encourage you to use only one
    computer for coding the solutions (as in an ICPC contest). Regarding using
    templates, googling, and copy-pasting code: feel free to do it.

Rationale of rule 4.

We decided to write explicitly rule 4 since there is always the doubt of how one
should participate in this kind of mirrors. Not allowing the usage of templates
and copy-pasting is a not-so-funny rule of icpc contests, so we decided not to
include it for this mirror. On the other hand, using only one computer is a cool
rule which makes this kind of contests unique, so we decided to include it.

UPDATE: We hope you liked the problems!

Congratulations to the winners, and especially to the first two teams for AK:

 1. dw my perception of the difficulties was not exactly spot on: tourist,
    ecnerwala.
 2. xinyoudui: PubabaOnO, orzdevinwang, jqdai0815
 3. MIPT: Yolki-palki: Tikhon228, Pechalka, Kapt
 4. Captain take me!: crazy_sea, A_zjzj, 275307894a
 5. Beyond Three Wolves: Kevin114514, CrTsIr, Atomic-Jellyfish
 6. HSE: FFTilted: Kirill22, Ormlis

We uploaded the editorial of the contest.

Tune in to ICPCLive to see the closing ceremony and find out how the onsite
teams did at 18:00 CET!

UPDATE 2:

Congratulations to the medalists of the onsite contest:

 1. Warsaw Eagles 2024 — University of Warsaw (the only team with 9 problems)
 2. Zagreb 1 — University of Zagreb
 3. KNU_0_GB_RAM — Taras Shevchenko National University of Kyiv
 4. ELTE 1 — Eötvös Loránd University
 5. UWr 1 — University of Wroclaw
 6. ENS Ulm 1 — École Normale Supérieure de Paris

Full text and comments »

Announcement of European Championship 2024 - Online Mirror (Unrated, ICPC Rules,
Teams Preferred)
 * 
 * +385
 * 

 * dario2994
 * 2 weeks ago
 * 52


Codeforces Round #936 (Div. 2)

By yunetive29, history, 2 weeks ago, translation,



HOLA, CODEFORCES!

We are pleased to invite you to participate in Codeforces Round 936 (Div. 2),
which will start on Friday, March 22, 2024 at 16:35UTC+2.

The round was prepared by exhausted, max0000561, azureglow and myself.

This round will be rated for participants whose rating is below 2100.
Participants with higher ratings may participate out of the competition.

You will be given 6 problems and 2 hours to solve them. We hope you find them
interesting.

We would like to thank:

 * 74TrAkToR for coordinating the round.
 * Our testers A_G, teraqqq, green_gold_dog, meowcneil, Noinoiio, sdyakonov,
   molney, IzhtskiyTimofey, zwezdinv, Nickir, Kihihihi, sergeev.PRO, lerasimus,
   127.0.0.1, RomkaRS, makrav, Vash_nick, pskobx, VitalyKo, marzipan, zarubin,
   lunaTu, moniMono, xalwa, Gmix_Ivan_Zolo_57, Lelyte, KoT_OsKaR, __Foam,
   DamagedMoss5883, Iron_Fenix, OR_LOVe, Sonya_2009, tmari_sun, tfoppers,
   kuzyaa.
 * MikeMirzayanov for Codeforces and Polygon platforms.

Special thanks to KoT_OsKaR and teraqqq for their help in creating tasks.

Good luck on the round and high rankings to everyone!

Score Distribution: 500−1000−1500−1750−2250−2750.

UPD: The date of the round has been changed to avoid interference with a
competition on another platform.

UPD: Editorial



Full text and comments »

Announcement of Codeforces Round 936 (Div. 2)
announcement, cf 936, div. 2
 * 
 * +605
 * 

 * yunetive29
 * 2 weeks ago
 * 278


The 2nd Universal Cup Semifinal & 2024 Summer Summit Announcement

By chenjb, 2 weeks ago,


UPD: We plan to host the 2024 Universal Cup Summer Summits in Cancún, Mexico.
The event has been scheduled from June 19 to June 23. The detailed schedule,
materials, and list of the invited teams will be announced in the future. The
2nd Universal Cup Semifinals will be held on June 23, 2024. The contest will
start at 17:00 (UTC +8) and end at 22:00 (UTC +8). Please note that there will
be no extra time windows on the semifinals contest — all the teams must start in
the only official time window. You may check the event time on your local
timezone here: Link. The onsite participants will participate in the semifinals
on June 22nd (one day before the online participants)

Hello everyone, we are happy to announce the 2nd Universal Cup Semifinal and the
2024 Universal Cup Summer Summit.

In Season 2, thanks to everyone's support and efforts from our staff, there was
a lot of progress compared to Season 1. We have over 3000 teams registered and
so far we have scheduled over 30 stages in this season. We also managed to
implement a registration webpage and host all kinds of contests on our platform,
including the run-twice contest, the prime contest and the challenge contest. We
also reached many agreements with Huawei about future cooperation, including the
most exciting part: the onsite final. (Cooperation between Universal Cup and
Huawei)

In the 2024 ICPC Latin American Championship, Universal Cup was invited to run
the Huawei Challenge as a major part of the event. Our co-president Jingbang
also gave a brief introduction of Universal Cup during the event to all the
participants and coaches.

We still have more things coming! We have just finalized the rules for selecting
the 2nd Universal Cup Final teams. The 2nd Universal Cup Semifinals will take
place online, in order to select teams for the Final Contest. The contest is
scheduled on one of the last two weekends of June (June 23 or 30). In addition,
we have decided to host a special event, the 2024 Universal Cup Summer Summit in
June. Supported by Huawei, we plan on inviting 10 teams to the wonderful city of
Cancun, Mexico. The event will last around 5 days, including an onsite
competition using the semi-final contest, a city tour, and some other
activities. All fees will be covered by us. The exact schedule will be announced
soon.

We want to express our gratitude again to everyone, especially problem-setters
who have shared their wonderful contests with us. We are also planning to design
souvenirs and prizes which will go to our contributors and participants, so stay
tuned!

Here are the rules for the semifinal and the summer summit.

Details


ONLINE STAGES

The online stages last from September 2, 2023, to April 20, 2024. For details on
the rules, schedule, and ratings, please visit the following links: rules,
schedule, and ratings.

The online stages of this season will end on Apr 20, 2024. The ratings of the
online stages will be finalized and published on Apr 23, 2024.

Note: As we mentioned in the rules, if you participated in the onsite event of
an online stage and would like to add your onsite standings to the ratings, you
must reach out to the organizing committee before April 23, 2024. We will not
accept submissions after the publication of the results.


SEMIFINALS

The 2nd Universal Cup Semifinals will take place online, in order to select
teams for the Final Contest. The contest is scheduled on one of the last two
weekends of June (June 23 or 30), with the same rules of the online stages,
except the time windows part. There will be only one window for the Semifinal
and it will be an original, fresh contest, which was not used in any other
events. The exact time will be announced soon.


UNIVERSAL CUP FINALS

The 2nd Universal Cup Final event will invite at least 20 teams. The promotion
process will start at least three months before the event. The promotion process
is as follows.

PART 1: ONLINE STAGES (UP TO 10 TEAMS)

The top 10 teams from the season's ratings will be invited to the Finals. The
teams will have to choose whether to accept the invitation in the first week of
the promotion process.

PART 2: CONTRIBUTORS (UP TO 2 TEAMS)

In appreciation of teams contributing contests during the online stages, up to 2
slots are reserved. This applies to teams that submitted at least one contest
but didn't qualify in Part 1. The highest-rated two among them will advance to
the onsite finals. In cases where a contest is contributed by multiple teams,
only one may advance using this contribution. Teams that would like to compete
for the contributor slots will have to apply within the first week when the
promotion process begins.

PART 3: SEMIFINALS (AT LEAST 8 TEAMS)

Subtracted by the number of teams promoted from Part 1 and 2, all other finals
slots will be distributed through the Semifinals. Excluding teams that are
already invited, teams will be invited in the order of the semifinal result.
Each team will have up to 3 days to decide whether to accept the invitation.
This process will start after the promotion process of Part 1 and 2 finishes and
terminate when all slots are distributed.

The total number of onsite slots will be at least 20. However, the Universal Cup
committee reserves the right to distribute slots if there are more.


THE 2024 UNIVERSAL CUP SUMMER SUMMIT

The Summer Summit event will have 10 slots in total and it will only be based on
the season rating. Teams will be invited in the order of the season’s rating.
Each team will have up to 3 days to decide whether to accept the invitation.
Note that being invited to the Summer Summit doesn’t guarantee a slot for the
onsite Finals.

Universal Cup

2024.3.19

Full text and comments »

ucup
 * 
 * +530
 * 

 * chenjb
 * 2 weeks ago
 * 2


Codeforces Round #935 (Div. 3)

By Kirill_Maglysh, history, 2 weeks ago, translation,


Pay attention to the unusual round start time.

Hello, Codeforces!

Codeforces Round 935 (Div. 3) will start at Tuesday, March 19, 2024 at
10:05UTC+2. The problems are expected to compose an interesting competition for
participants with ratings up to 1600. However, all of you who wish to take part
and have a rating of 1600 or higher, can register for the round unofficially.

The round will be hosted by rules of educational rounds (extended ICPC). Thus,
solutions will be judged on preliminary tests during the round, and after the
round, it will be a 12-hour phase of open hacks.

You will be given 8 problems and 2 hours and 15 minutes to solve them.

Note that the penalty for the wrong submission in this round is 10 minutes.

Remember, that only the trusted participants of the third division will be
included in the official standings table. As it is written by link, this is a
compulsory measure for combating unsporting behavior. To qualify as a trusted
participant of the third division, you must:

 * take part in at least five rated rounds (and solve at least one problem in
   each of them)
 * do not have a point of 1900 or higher in the rating.

Regardless of whether you are a trusted participant of the third division or
not, if your rating is less than 1600, then the round will be rated for you.

The problems are based on VKOSP.Junior. Authors: Kirill_Maglysh, NToneE, Gadget.

We would like to thank:

 1. Vladosiya for coordinating the round.

 2. nigus, Gheal, KKT_89, Noinoiio, systy, FBI, SiERic, moonpie24, nik.danilov,
    SashaT9, Pa_sha, FedShat, an_na, khaser, Ghevar, Boris_Ber, PUFL, blook,
    yakuri354, iluminat_Btopou_AkkayHT for testing.

 3. gurovic for improving the quality of the statements.

 4. MikeMirzayanov for Polygon and Codeforces platforms.

Всем удачи!

UPD: Editorial is out

Full text and comments »

Announcement of Codeforces Round 935 (Div. 3)
announcement
 * 
 * +122
 * 

 * Kirill_Maglysh
 * 2 weeks ago
 * 238


Codeforces Round #934 (Div1, Div2)

By Dominater069, 3 weeks ago,


Hello Codech....err i mean Codeforces!

I invite you to participate in Codeforces Round 934 (Div. 1) and Codeforces
Round 934 (Div. 2) which will start on Saturday, March 16, 2024 at 16:35UTC+2.

You will be given 6 problems and 2 hours 15 minutes to solve them in both
divisions. Division 1 has 2 subtasks2 subtasks, and Division 2 has 1 subtask1
subtask.

Joining us on the problem setting panel are:

 * Coordinator: Ashley errorgorn Khoo.

 * Authors: Satyam satyam343 Kumar Roy, Aditya Everule Jain, Shreyan
   Dominater069 Ray.

 * Russian Translation: Alexey Alexdat2000 Datskovskiy.

 * Red Testers: Kostia kostia244 Savchuk, Jeroen jeroenodb Op De Beek, Andrei
   andrei_boaca Boaca, Luan LipArcanjo Arcanjo, Fernando ffao Fonseca, Alexander
   teraqqq Babin, Aleksei Vercingetorix Esin, Zixuan RDDCCD Yan, Aws Kaitokid
   Issa, hyforces.

 * Yellow Testers: Naveen evenvalue Kulkarni, Kaio MvKaio Vieira, pavement,
   penguin133, zengminghao, Irmuun Irmuun.Ch Chinbat, Jared golions Goff, James
   jamessngg Sng, Sergey Kniaz Kniazevskiy, Chien-Yi -1e11 Chien, camc, Hriday
   the_hyp0cr1t3 G, Aryan aryan12 Maskara, Thomas oursaco, Weobe, Leonardo
   defnotmee Valente Nascimento.

 * Purple Testers: Milind milind0110 Gupta, straw berr y.

 * Blue Testers: Matthew chromate00 Roh, Ahmad Ahmad45123 Elwasefi, Kirill
   Sk0rlupka Kobets, Ivan peshkoff Peshkov, Yi Xiang Tyx2019 Tey, June cjc Chen,
   Kirill AbsurdMan Petrov, ExpensiveAC, Elyes ElyesChaabouni Chaabouni,
   Ianlsam, Non-origination, nsqrtlog

 * Cyan Testers: Vyacheslav Kirito.LVL99 Komarov, Harsh Codula Sharma.

 * Gray Testers: Sergey ansergeyg An.

 * Negative Rated Testers: Cozma tibinyte Tiberiu-Stefan.

I would like to thank MikeMirzayanov for platforms Codeforces and Polygon.

Please do read a few problems in advance at the very least. Especially with all
the subtasks, it is strictly in your benefit to read and choose the problems you
want to try. Good luck. We hope you enjoy the problemset.

Score Distribution will be posted soon.

UPDUPD : Score Distribution :
Div2 : 500 + 1000 + 1500 + 2250 + 2250 + (2250 + 2750).
Div1 : 500 + 1250 + 1250 + (1250 + 2000) + (2000 + 1500) + 4500.

UPD2UPD2 : Sorry for the issue with the queue towards the end. Hope you enjoyed
the round.

UPD3UPD3 :
Div2 :
1) WanYuanShenWanDe
2) tzc___________________wk
3) kcodex
4) mily
5) Oinng123

Div1 :
1) tourist
2) jiangly
3) gyh20
4) Benq
5) ecnerwala

UPD4UPD4 : Editorial is out.

Full text and comments »

Announcement of Codeforces Round 934 (Div. 1)
Announcement of Codeforces Round 934 (Div. 2)
 * 
 * +518
 * 

 * Dominater069
 * 3 weeks ago
 * 287


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