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.