Hello, Codeforces! (or as we say in romanian, "Nu renunţ la tine niciodată")

I am glad to invite everyone to participate in Codeforces Round #833, which will be held on Saturday, November 12th at 16:35 UTC+2.

This round will be rated for all participants with rating lower than 2100.

You will be given 6 problems and 2 hours to solve them. All of the problems are authored by me.

I would like to thank the following people, without whom this round would not have been possible:

• IgorI for his awesome coordination of the round and for helping me with problem preparation.
• atodo, BucketPotato, andrei_boaca, hochesh, valeriu, powergee101, jampm, alin_gb18, sutekine,tibinyte and ansergeyg for testing the round and providing valuable feedback.
• MikeMirzayanov for the great systems Codeforces and Polygon.

Here is the scoring distribution: $$$500−1000−1500−2000−2250-2750$$$

Good luck & have fun!