Hello Codeforces!
We are glad to invite you to take part in the first round of VNOI Cup, which will take place at 13:00 UTC, on this Saturday, 18th June
VNOI Cup is a Competitive Programming competition held by VNOI (Vietnam Olympiads in Informatic community), which is a non-profit organization, by Vietnamese competitive programmers, for Vietnamese competitive programmers. Our aim is to support the growth of competitive programming in Vietnam, and we hope that this competition is one of the things that follows this aim!
There are 3 elimination rounds and a Final round in this competition. In this elimination round, there are 5 problems