Codeforces Round 1133 (Div. 1, Div. 2) is coming soon! Register here.
→ About Contest
Problems were written by Marcelo Fornet, Mariano Crosetti, Mário da Silva, Moroni Silverio, André Amaral de Sousa, Nicolás Álvarez, Pablo Zimmermann, Paulo Cezar Pereira Costa, Carlos Mendoza and Vinicius Santos.
→ Virtual participation
Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.
→ Practice?
Want to solve the contest problems after the official contest ends? Just register for practice and you will be able to submit solutions.
→ Contest materials
Codeforces (c) Copyright 2010-2026 Mike Mirzayanov
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