Hello, Codeforces! 👋

We’re Nebius.

You might remember our Welcome Round a few years ago, and we're back with another round! We invite you to take part in our Second round on Codeforces: Nebius Round 2 (Codeforces Round 1088, Div. 1 + Div. 2). Join us on Mar/28/2026 17:45 (Moscow time) and test your skills by solving problems!

In the meantime, we want to share something big.

We’re launching our first Early Talent Program for students and recent grads.

Quick intro. I used to coordinate Codeforces rounds back in 2014–2015, did IOI/ICPC, and was pretty active here in the 2010s. Now I’m a Director of Engineering at Nebius, working on our new agentic search direction. As a former intern of similar program, I’d be really happy to see more CF folks join us.

This is not a “watch and learn” internship. You’ll be working on real systems such as AI infrastructure, cloud, product, and AI RnD, shipping things, and having actual ownership.

What you get

Details

Roles and locations:

• AI Researcher — Amsterdam (HQ), Berlin, Remote (from Europe & United States)
• Backend Developer — Amsterdam (HQ)
• Full Stack Developer — Amsterdam (HQ)
• ML Engineer — Life Sciences — Amsterdam (HQ)
• AI/ML Specialist Solution Architect — Remote (from United States)
• Network Engineer — Amsterdam (HQ)
• Site Reliability Engineer — Amsterdam (HQ)
• Cloud Engineer — Amsterdam (HQ)
• Data Center Technician — Finland, United States, Paris, Tel Aviv

Who we’re looking for

• Students / recent grads / early specialists
• Strong fundamentals + interest in large-scale systems
• Candidates eligible to work full-time on-site in the role’s location

Use the link below to complete the application form for the open positions.

Till soon!

Hello, Codeforces!

__baozii__ and I are glad to invite you to participate in Codeforces Round 1087 (Div. 2). The round will take place at Mar/21/2026 17:35 (Moscow time). There will be $$$6$$$ problems, and you will have $$$2$$$ hours to solve them. The round will be held according to the Codeforces rules and will be rated for division $$$2$$$.

At least one problem will be interactive, so we highly recommend you to read guide for interactive problems before the contest.

UPD: score distribution:$$$500 - 750 - 1500 - 1750 - 2250 - 3000$$$.
UPD:editorial

We would like to thank:

• Sugar_fan for coordination.
• Alexdat2000 for Russian translation.
• MikeMirzayanov and KAN for the best platform.
• Um_nik, Dominater069 for nutella testing.
• Tobo, Intellegent, A_G, k1r1t0, _istil, nifeshe for red testing.
• 0x3F, Proof_by_QED, FelixArg, DNR, -firefly-, Timosh, Arpa for orange testing.
• madlogic, Amao_Fox, Jamshed11 for purple testing.
• chromate00, simplelife, Argentum47, satyam343, SkyWave2022 for blue testing.

Wishing everyone good luck and high ratings!

upd:

top $$$10$$$:

1. bismispis
2. 415411
3. TripleM5da
4. StarSilk
5. undefined_Ryan
6. maspy
7. Cody473
8. antontrygubO_o
9. YuukiS
10. potato167

top $$$10$$$ rated:

1. bismispis
2. undefined_Ryan
3. Cody473
4. qwertyuiojhygtfdfg
5. AJ123496
6. pixelcoder20
7. Ravnik
8. Khai2007
9. ixumqwq
10. _annhien_ruby22

Notes that there will be an update about the top $$$10$$$ after roll-back.

TL;DR: Register for the qualification round at https://midnightcodecup.com

Last year we decided to revive the craziest problem solving format of all — the 24-hour onsite. It turned out amazing, so we are bringing more craziness and problems this year.

We’re supported by incredible sponsors: Recraft, OpenAI, Nebius, Alber Blanc, Revolut, Logical Intelligence, and Pinely. Huge thanks to the teams at these companies for backing problem-solving minds – this is the way.

Join the qualification round here at Codeforces on April 11th at 1 PM UTC.

The best 25 teams + 5 wildcards will travel to Belgrade on July 4–5 for a 24-hour final. We can’t wait to see who makes it this year — and the jury will not be shy about challenging you.

Btw, please give it up for The Jury: Aksenov239, qwerty787788, cdkrot, tourist, nsychev, naagi, Gassa, Arpa, pashka, yulik.daniel, xiaowuc1, isaf27, mnaeraxr , aropan, Solenoid555.

Now go register, follow our newly created X account for updates and..

See you at Midnight!

Hello Codeforces!

The series of Educational Rounds continues thanks to the support of the Computer Science and Artificial Intelligence (CSAI) program at Neapolis University Pafos, with scholarships provided by JetBrains.

Educational Codeforces Round 188 (Rated for Div. 2) will start on Mar/16/2026 17:35 (Moscow time).

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6-7 problems and 2 hours to solve them.

The problems were invented and prepared by Adilbek adedalic Dalabaev, Ivan BledDest Androsov, Maksim Neon Mescheryakov, Roman Roms Glazov, Alex fcspartakm Frolov and me. Also, huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Neapolis University Pafos also have a message for you:

CSAI: First admission deadline approaches — April 28, 2026.

Apply for the BSc in Computer Science & Artificial Intelligence at the Neapolis University Pafos. Up to 40 full scholarships, provided by the JetBrains Foundation, are available this year.

Key Dates

• Application Deadline: April 28, 2026, 11:59 pm UTC
• Mandatory Entrance Test: May 3, 2026

A great opportunity: ACTS 2026.2 Camp

To improve skills and prepare for intense programs like CSAI, we encourage applying for the ACTS 2026.2 Camp in Germany (July 10-20, 2026).

• Tracks: Competitive Programming and Software Engineering.
• Registration Deadline: April 18th.

Ready to advance your coding journey? Join a leading computer science community today! Apply now and visit our dedicated pages for more details on how you can get involved.

UPD: Editorial is out

Hello, Codeforces!

abc864197532 and I are pleased to invite you to Codeforces Round 1086 (Div. 2) on Mar/14/2026 17:35 (Moscow time)!

You will be given $$$5$$$ problems to solve in $$$2$$$ hours. Some of these problems are divided into subtasks. The scoring distribution is $$$500-1000-1250-(1250+1250)-3000$$$.

The problems of this round were prepared by tybbs, Mini_PEKKA and me. We would like to thank the following people for making this round possible.

• abc864197532 for his wonderful coordination.
• Alexdat2000 for Russian translation.
• __baozii__, _istil, ETO_leader, Fysty, WiwiHo, amano_hina, baluteshih and max0810 for red testing.
• Friedrich, Halberd_Cease and guagua0407 for orange testing.
• CSQ31, Maskrio, Murinho, Neil_Qian and raresh30 for purple testing.
• daniel071292, lev1106 and the_dragon_emperor for blue testing.
• afoasdfashdoif for black testing.
• MikeMirzayanov and KAN for the brilliant Codeforces and Polygon platform.
• You, for participating.

Good luck & Have fun!

UPD: The editorial has been published. Congratulations to the winners!

Div .1 and Div. 2:

1. ksun48
2. Nachia
3. A_G
4. YuukiS
5. ttamx
6. BurnedChicken
7. StarSilk
8. 244mhq
9. kotatsugame
10. 415411

Div. 2 Only:

1. debangsu_
2. masy2011
3. vlp
4. Conqueror5
5. lzh999
6. alex.krivoschecov
7. vld.ktk
8. ExtraNumber
9. XorGhost
10. 11Gaurav1

Hello Codeforces!

Kotlin Heroes: Episode 14 has wrapped up, and what an exciting round it was! Thanks to everyone who joined the contest, solved problems, and made this round another great Kotlin Heroes event.

We’ve already had many amazing rounds of the Kotlin Heroes series, and it’s incredible to see the community grow with each episode. Once again, we are proud to celebrate the true heroes of Kotlin who rose to the top and earned well-deserved prizes.

Top 3 contestants are:

1. Golovanov399
2. BucketPotato
3. literalchild

Kotlin Heroes T-shirts will go to the top 50 contestants:

These participants, who solved at least one problem, were randomly selected to receive special Kotlin Heroes T-shirts:

We’ll be in touch soon to coordinate prize delivery. Some participants from the previous round are still waiting for their Kotlin Heroes T-shirts due to shipping delays. We are working to resolve this and will make sure everyone receives their prizes. Thank you so much for your patience!

It's great to see new people learning Kotlin and performing brilliantly in the competition. Want to keep practicing? Challenges from all 14 previous rounds are available here: Episode 1, Episode 2, Episode 3, Episode 4, Episode 5: ICPC Round, Episode 6, Episode 7, Episode 8, Episode 9, Episode 10, Episode 11, Episode 12, Episode 13 and Episode 14.

If you’d like to sharpen your Kotlin skills, start with:

• Tour of Kotlin to learn the basics
• Algorithmic Challenges in Kotlin course, created by some of the competitive programming champions
• Competitive programming tutorial
• Videos on competitive programming in Kotlin from top competitive programmers

Stay tuned for future rounds, and we hope to see you again in the next Kotlin Heroes contest!

Hello, Codeforces!

IceSerpent and I are pleased to invite you to Codeforces Round 1085 (Div. 1 + Div. 2) on 08.03.2026 17:35 (Московское время)! While some of us will be turning our clocks an hour forward for daylight savings, our theme will turn it way back to the 2010s.

You will be given $$$8$$$ problems to solve in $$$3$$$ hours. Note that some of these problems are further divided into subtasks. Some of the problems may be interactive, so please read the guide for interactive problems if you are not familiar with them. The scoring distribution is as follows:

$$$\ \ \ \,$$$ $$$\ $$$ $$$\ \,$$$ $$$\,$$$ $$$\quad\ \ \ \ \,$$$ $$$\quad\ \ \ \ \ \,$$$ $$$\ \ $$$ $$$\qquad\ \ \ \ \ \ \ \,$$$ $$$\qquad\quad\ \ \ \ \ \ \ \ $$$

The problems of this round were authored by IceSerpent and myself, awang11. In addition, we would like to thank:

• 244mhq for his excellent coordination of the round and translating the problems to Russian;

• Um_nik for pre-reviewing the round;

• flummoxedfeline for providing beautiful illustrations;

• our army of testers, for their invaluable feedback and eagerness to testsolve: Um_nik, shcal, awesomeguy856, Extile, Noobish_Monk, __baozii__, Amazed, SomethingNew, awoo, -firefly-, ink31930, nik_exists, chromate00, cduckling, madlogic, Hori, misteg168, Dominater069, errorgorn, defnotmee;

• and of course MikeMirzayanov and KAN for the Codeforces and Polygon platforms.

UPD 1: The scoring distribution has been released!

UPD 2: Editorial is released at https://mirror.codeforces.com/blog/entry/151886. Hope you enjoyed the round!

UPD 3: The results!

Div. 1 + 2

1. ecnerwala

2. ksun48

3. tourist

4. turmax

5. hitonanode

6. jiangly

7. Elysion

8. Kapt

9. tickcross.y

10. StarSilk

First clears

A. LeonVir, 00:01

B. ksun48, 00:09

C. Golovanov399, 00:11

D. PelicanPilot, 00:16

E1. liaoyanxu, 00:14

E2. Ayush79, 00:33

F. littleju, 00:34

G. ainta, 01:25

H1 + H2 + H3. ecnerwala, 02:31

Hello, Codeforces!

We would like to invite you to participate in the live online mirror contest of The 2026 ICPC Asia Pacific Championship next weekend. ICPC Asia Pacific Championship is the contest for top non-winning teams from all regional contests in the region to qualify to the World Finals. See the region rules and competition page for more details.

The official contest is scheduled to start at Sunday, 8 March 2026, 09:30 AM (UTC+8). The live online mirror contest is scheduled to start only 15 minutes later, to keep both contests run almost in sync. The contest is 5 hours long and consists of several problems.

Please note that we might have to postpone the live online mirror contest in case the official contest is delayed. This is to ensure that the tasks are not available to the public until the official contest starts.

The contest will use ICPC-style scoring (same as the official contest) and will be unrated. You can participate as an individual or as a team, although as a team of three members is preferred.

See you on the top of the leaderboard!

The 2026 ICPC Asia Pacific Championship Judges

[UPD]: Task analysis

Hello Codeforces!

We are happy to announce the new episode of Kotlin Heroes! It is both an opportunity to try learning a new programming language (if you've never coded in Kotlin before) or solve programming problems of very different levels of difficulty in it (if you're already familiar with Kotlin). No matter if you're a professional or a beginner, we'll be glad to see you participate!

This is already the fourteenth time we conduct this competition, and the previous 13 episodes had lots of amazingly talented programmers participating. You can see for yourself by checking them out: Episode 1, Episode 2, Episode 3, Episode 4, Episode 5: ICPC Round, Episode 6, Episode 7, Episode 8, Episode 9, Episode 10, Episode 11, Episode 12 and Episode 13.

To prepare for the Episode 14, we advise you to register to the practice round, which contains several problems of various difficulties from past Codeforces contests. In the practice round, all solutions will be open to view for anyone.

We also recommend that you check some resources which can help you learn more about competitive programming in Kotlin:

• An official competitive programming tutorial.
• A base of solutions for Advent of Code algorithmic puzzles.
• A collection of videos on using Kotlin in Competitive Programming, all arranged into one YouTube playlist.

And if you’d like to see how the top competitive programmers approach these challenges, check out ecnerwala and SecondThread solving problems from this practice round live on stage at the ICPC World Finals in Baku.

On March 2, 2026, the main phase of the contest starts! During Kotlin Heroes: Episode 14, you will have 2 hours and 30 minutes to solve several programming problems, ranging from simple short exercises to challenges that will test both your coding skills and algorithmic thinking.

The use of AI-based tools during the main contest is strictly limited. To find out the guidelines for proper AI use, what is allowed and what is prohibited, please read the post "Rule Restricting the use of AI". Improper use of AI tools during the main contest may result in disqualification. Using automatic translation tools (including but not limited to neural networks and AI) to convert code written in other programming languages to Kotlin goes against the spirit of the competition, so it is also strictly prohibited.

Prizes:

• 🥇 $512 (or equivalent value) for 1st place
• 🥈 $256 for 2nd place
• 🥉 $128 for 3rd place
• 👕 Kotlin Heroes T-shirts for the top 50 participants
• 🎁 A raffle of 50 T-shirts for anyone who solves at least one problem

Please note that we are not able to ship prizes to any country, state, province, or territory subject to comprehensive OFAC sanctions, including Belarus, Cuba, Iran, North Korea, Russia, Syria, or the Crimea, Donetsk, or Luhansk regions. For complete the list, please visit this page.

Good luck to all of the participants! I hope you will enjoy the problems we've prepared.

Hi all!

The second edition of the Blitz Cup is concluding this weekend! The final bracket is shown below. On Saturday, 10 matches were played with live commentary, and we watched quite a few tight fights! Recording is available on Youtube.

Final day

On Sunday, we're playing the remaining matches: two quarterfinals, two semifinals, and the final match! The schedule is as follows:

• Starting 12:05 UTC, tourist vs Ormlis Quarterfinals;
• 13:05 UTC, ecnerwala vs feecle6418 Quarterfinals;
• 14:05 UTC, Um_nik vs winner of (tourist vs Ormlis) Semifinals;
• 15:05 UTC, ksun48 vs winner of (ecnerwala vs feecle6418) Semifinals;
• 16:05 UTC, the final match!

Tune in at 12:00 UTC to the stream below to watch the action!

UPD

Congratulations to Um_nik, our Codeforces Blitz Cup 2026 Champion!