Hello, Codeforces!↵
↵
We are pleased to announce the resumption of the Global Rounds. Thanks to XTX Markets for supporting the initiative! In 2025, we will hold 3 such rounds. The series results will take into account the best 2 participations out of 3.↵
↵
On [contest_time:2147] we will host [contest:2147]. **<img src="/predownloaded/2e/e2/2ee2f0f95f05aae6ca6f47812dae2dc2aabf277b.png" style="width: 200.0px;float: right;margin: 0 1.0em 1.0em 1.0em;max-width: 100.0%;max-height: 100.0%;">**↵
↵
Codeforces Global Round 29 marks the first round in the 2025 series of Codeforces Global Rounds. These rounds are open and rated for everyone.↵
↵
The prizes for this round are as follows:↵
↵
- The top 30 participants will receive a t-shirt.↵
- 20 t-shirts will be randomly distributed among participants ranked between 31 and 500, inclusive.↵
↵
The prizes for the 3-round series in 2025:↵
↵
- In each round, the top-100 participants get points according to the [table](https://pastebin.com/NMzrRci8).↵
- A participant's final score will be the sum of the points they earned in their 2 highest-placing rounds.↵
- The top 20 participants across the series will receive sweatshirts and placement certificates.↵
↵
We extend our gratitude to XTX Markets for supporting the global rounds initiative in 2025!↵
↵
The problems were written and prepared by [user:Misteg168,2025-09-16], [user:FelixMP,2025-09-16], [user:Pablo-No,2025-09-16], [user:Danx,2025-09-16], [user:Megustaelarroz23,2025-09-16], [user:Clan328,2025-09-16] and me.↵
↵
We would also like to thank:↵
↵
- Coordination: [user:Um_nik,2025-09-16]↵
↵
- 🍫 Nutella testing: [user:gamegame,2025-09-16], [user:ormlis,2025-09-16]↵
↵
- 🍅 Tomato testing: [user:ikaurov,2025-09-16], [user:prvocislo,2025-09-16], [user:NemanjaSo2005,2025-09-16], [user:Merkurev,2025-09-16], [user:tfg,2025-09-16], [user:TheScrasse,2025-09-16] and [user:WLZ,2025-09-16]↵
↵
- 🍌 Banana testing: [user:Rlidon2006,2025-09-16], [user:Esomer,2025-09-16], [user:Sergio_2357,2025-09-16], [user:Kikos,2025-09-16], [user:Dalek_of_Rivia,2025-09-20] and [user:-firefly-,2025-09-20]↵
↵
- 🍆 Eggplant testing: [user:Janbobi,2025-09-16] and [user:Rafatoa,2025-09-16]↵
↵
- 🫐 Blueberry testing: [user:angrySeal,2025-09-16], [user:Lucia_Aparicio,2025-09-16], [user:chromate00,2025-09-16] and [user:eloipages,2025-09-16]↵
↵
- 🥒 Cucumber testing: [user:kalufas,2025-09-16]↵
↵
- 🥥 Coconut testing: [user:dlos,2025-09-16]↵
↵
- [user:MikeMirzayanov,2025-09-16] and [user:KAN,2025-09-16] for the great platforms↵
↵
Round Information:↵
↵
- Duration: 3h↵
- Number of problems: 9↵
↵
**UPD:** Score distribution: $500 - 1000 - 1500 - 2000 - 2500 - 3000 - 4500 - 5500 - (4000 + 3500)$↵
↵
**UPD2: In this round, some of the problems will feature interactive visualizers that can help you to play around with small test cases. These are not part of the problem statements, although we tried our best to make sure that their behaviour correctly follows it. You can investigate examples or your own tests in more details with them. Note the following:**↵
↵
- the visualizers use javascript in your browser to work; you don't need to install anything additional;↵
↵
- we won't be able to help with the visualizers during the round.↵
↵
↵
Picture of authors (and some testers) (and some non testers):↵
↵
↵
We eagerly anticipate your participation!↵
↵
**UPD3**↵
Congratulations to all the winners!!!↵
↵
1. [user:ecnerwala,2025-09-20]↵
2. [user:jiangly,2025-09-20]↵
3. [user:ksun48,2025-09-20]↵
4. [user:Benq,2025-09-20]↵
5. [user:heuristica,2025-09-20]↵
6. [user:turmax,2025-09-20]↵
7. [user:strapple,2025-09-20]↵
8. [user:Nachia,2025-09-20]↵
9. [user:hos.lyric,2025-09-20]↵
10. [user:Kevin114514,2025-09-20]↵
↵
**UPDT 4: ** Editorial is out: https://mirror.codeforces.com/blog/entry/146633↵
↵
↵
↵
We are pleased to announce the resumption of the Global Rounds. Thanks to XTX Markets for supporting the initiative! In 2025, we will hold 3 such rounds. The series results will take into account the best 2 participations out of 3.↵
↵
On [contest_time:2147] we will host [contest:2147]. **<img src="/predownloaded/2e/e2/2ee2f0f95f05aae6ca6f47812dae2dc2aabf277b.png" style="width: 200.0px;float: right;margin: 0 1.0em 1.0em 1.0em;max-width: 100.0%;max-height: 100.0%;">**↵
↵
Codeforces Global Round 29 marks the first round in the 2025 series of Codeforces Global Rounds. These rounds are open and rated for everyone.↵
↵
The prizes for this round are as follows:↵
↵
- The top 30 participants will receive a t-shirt.↵
- 20 t-shirts will be randomly distributed among participants ranked between 31 and 500, inclusive.↵
↵
The prizes for the 3-round series in 2025:↵
↵
- In each round, the top-100 participants get points according to the [table](https://pastebin.com/NMzrRci8).↵
- A participant's final score will be the sum of the points they earned in their 2 highest-placing rounds.↵
- The top 20 participants across the series will receive sweatshirts and placement certificates.↵
↵
We extend our gratitude to XTX Markets for supporting the global rounds initiative in 2025!↵
↵
The problems were written and prepared by [user:Misteg168,2025-09-16], [user:FelixMP,2025-09-16], [user:Pablo-No,2025-09-16], [user:Danx,2025-09-16], [user:Megustaelarroz23,2025-09-16], [user:Clan328,2025-09-16] and me.↵
↵
We would also like to thank:↵
↵
- Coordination: [user:Um_nik,2025-09-16]↵
↵
- 🍫 Nutella testing: [user:gamegame,2025-09-16], [user:ormlis,2025-09-16]↵
↵
- 🍅 Tomato testing: [user:ikaurov,2025-09-16], [user:prvocislo,2025-09-16], [user:NemanjaSo2005,2025-09-16], [user:Merkurev,2025-09-16], [user:tfg,2025-09-16], [user:TheScrasse,2025-09-16] and [user:WLZ,2025-09-16]↵
↵
- 🍌 Banana testing: [user:Rlidon2006,2025-09-16], [user:Esomer,2025-09-16], [user:Sergio_2357,2025-09-16], [user:Kikos,2025-09-16], [user:Dalek_of_Rivia,2025-09-20] and [user:-firefly-,2025-09-20]↵
↵
- 🍆 Eggplant testing: [user:Janbobi,2025-09-16] and [user:Rafatoa,2025-09-16]↵
↵
- 🫐 Blueberry testing: [user:angrySeal,2025-09-16], [user:Lucia_Aparicio,2025-09-16], [user:chromate00,2025-09-16] and [user:eloipages,2025-09-16]↵
↵
- 🥒 Cucumber testing: [user:kalufas,2025-09-16]↵
↵
- 🥥 Coconut testing: [user:dlos,2025-09-16]↵
↵
- [user:MikeMirzayanov,2025-09-16] and [user:KAN,2025-09-16] for the great platforms↵
↵
Round Information:↵
↵
- Duration: 3h↵
- Number of problems: 9↵
↵
**UPD:** Score distribution: $500 - 1000 - 1500 - 2000 - 2500 - 3000 - 4500 - 5500 - (4000 + 3500)$↵
↵
**UPD2: In this round, some of the problems will feature interactive visualizers that can help you to play around with small test cases. These are not part of the problem statements, although we tried our best to make sure that their behaviour correctly follows it. You can investigate examples or your own tests in more details with them. Note the following:**↵
↵
- the visualizers use javascript in your browser to work; you don't need to install anything additional;↵
↵
- we won't be able to help with the visualizers during the round.↵
↵
↵
Picture of authors (and some testers) (and some non testers):↵
↵
↵
We eagerly anticipate your participation!↵
↵
**UPD3**↵
Congratulations to all the winners!!!↵
↵
1. [user:ecnerwala,2025-09-20]↵
2. [user:jiangly,2025-09-20]↵
3. [user:ksun48,2025-09-20]↵
4. [user:Benq,2025-09-20]↵
5. [user:heuristica,2025-09-20]↵
6. [user:turmax,2025-09-20]↵
7. [user:strapple,2025-09-20]↵
8. [user:Nachia,2025-09-20]↵
9. [user:hos.lyric,2025-09-20]↵
10. [user:Kevin114514,2025-09-20]↵
↵
**UPDT 4: ** Editorial is out: https://mirror.codeforces.com/blog/entry/146633↵
↵
↵
