HNOI Civil War 2019 - first season of HNOI Civil War. The teams participated officially are from two high school eligible for Hanoi Olympiads in Informatics '19: Hanoi-Amsterdam High School and Nguyen Hue High School.
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.