Hello, Codeforces!↵
↵
On August 29, 2026, the same problem set was used simultaneously in the following competitions:↵
↵
- **Maratona SBC de Programação 2026**↵
- **Competencia Boliviana de Programación 2026**↵
- **The 2026 ICPC Gran Premio de Centroamerica**↵
- **The 2026 ICPC Gran Premio de Mexico**↵
↵
The complete 14-problem set is now available on [Codeforces Gym](https://codeforces.me/gym/106679) for virtual participation and upsolving. The contest lasts five hours, and the statements are available in English, Portuguese, and Spanish.↵
↵
Whether you want to take it virtually as a team or solve the problems individually, we hope you enjoy the set!↵
↵
I am very grateful to my fellow problem authors: Leonardo Conegundes, [user:arthur.nascimento,2026-09-03], [user:fepaf,2026-09-03], [user:brunomont,2026-09-03], [user:Silverutm,2026-09-03], [user:naumazeredo,2026-09-03], and Luiz Santos.↵
↵
Preparing the contest involved much more than writing the problems. Huge thanks to everyone who reviewed statements and solutions, prepared generators, validators and checkers, translated the material, tested the problem set, coordinated the contests, and volunteered at the competition sites. I would like to thank [user:crbonilha,2026-09-03], [user:GabrielPessoa,2026-09-03], [user:ivanilos,2026-09-03], [user:LipArcanjo,2026-09-03], [user:Roberio,2026-09-03], [user:paulocezar,2026-09-03] and the many other people whose work made these competitions possible. In particular, special thanks to [user:Roberio,2026-09-03] for developing the awesome [`rbx`](https://rbx.rsalesc.dev/) tool, which saved us countless hours of work.↵
↵
We hope you enjoy the contest and have fun!↵
↵
<spoiler summary="The authors of each problem are:">↵
↵
```↵
A - High Frequency - Leonardo Conegundes, Brazil↵
B - Sequences - Arthur Nascimento, Brazil↵
C - Exchange Rate - Vinicius dos Santos, Brazil↵
D - Dragons in Harmony - Francisco Elio Parente Arcos Filho, Brazil↵
E - Network Editing - Arthur Nascimento, Brazil↵
F - Flower - Francisco Elio Parente Arcos Filho, Brazil↵
G - Genes - Bruno Monteiro, Brazil↵
H - Traffic Lights - Arthur Nascimento, Brazil↵
I - Inside the Guinea Pig Playpen - Moroni Silverio Flores, Mexico↵
J - Phone Lines - Naum Azeredo, Brazil↵
K - Contingency - Francisco Elio Parente Arcos Filho, Brazil↵
L - Maze - Arthur Nascimento, Brazil↵
M - Microwave - Luiz Santos, Brazil↵
N - Nlogônia's Keys - Vinicius dos Santos, Brazil↵
```↵
↵
</spoiler>↵
↵
↵
On August 29, 2026, the same problem set was used simultaneously in the following competitions:↵
↵
- **Maratona SBC de Programação 2026**↵
- **Competencia Boliviana de Programación 2026**↵
- **The 2026 ICPC Gran Premio de Centroamerica**↵
- **The 2026 ICPC Gran Premio de Mexico**↵
↵
The complete 14-problem set is now available on [Codeforces Gym](https://codeforces.me/gym/106679) for virtual participation and upsolving. The contest lasts five hours, and the statements are available in English, Portuguese, and Spanish.↵
↵
Whether you want to take it virtually as a team or solve the problems individually, we hope you enjoy the set!↵
↵
I am very grateful to my fellow problem authors: Leonardo Conegundes, [user:arthur.nascimento,2026-09-03], [user:fepaf,2026-09-03], [user:brunomont,2026-09-03], [user:Silverutm,2026-09-03], [user:naumazeredo,2026-09-03], and Luiz Santos.↵
↵
Preparing the contest involved much more than writing the problems. Huge thanks to everyone who reviewed statements and solutions, prepared generators, validators and checkers, translated the material, tested the problem set, coordinated the contests, and volunteered at the competition sites. I would like to thank [user:crbonilha,2026-09-03], [user:GabrielPessoa,2026-09-03], [user:ivanilos,2026-09-03], [user:LipArcanjo,2026-09-03], [user:Roberio,2026-09-03], [user:paulocezar,2026-09-03] and the many other people whose work made these competitions possible. In particular, special thanks to [user:Roberio,2026-09-03] for developing the awesome [`rbx`](https://rbx.rsalesc.dev/) tool, which saved us countless hours of work.↵
↵
We hope you enjoy the contest and have fun!↵
↵
<spoiler summary="The authors of each problem are:">↵
↵
```↵
A - High Frequency - Leonardo Conegundes, Brazil↵
B - Sequences - Arthur Nascimento, Brazil↵
C - Exchange Rate - Vinicius dos Santos, Brazil↵
D - Dragons in Harmony - Francisco Elio Parente Arcos Filho, Brazil↵
E - Network Editing - Arthur Nascimento, Brazil↵
F - Flower - Francisco Elio Parente Arcos Filho, Brazil↵
G - Genes - Bruno Monteiro, Brazil↵
H - Traffic Lights - Arthur Nascimento, Brazil↵
I - Inside the Guinea Pig Playpen - Moroni Silverio Flores, Mexico↵
J - Phone Lines - Naum Azeredo, Brazil↵
K - Contingency - Francisco Elio Parente Arcos Filho, Brazil↵
L - Maze - Arthur Nascimento, Brazil↵
M - Microwave - Luiz Santos, Brazil↵
N - Nlogônia's Keys - Vinicius dos Santos, Brazil↵
```↵
↵
</spoiler>↵
↵
