Hello, my dear lovers of algorithms and data structures.

Codeforces Round 380 will start on November 20 (Sunday), 09:05. It will be based on Technocup 2017 Elimination Round 2. So, if you are a Russian-speaking high-school student, please take part in the Technocup 2017.

Many thanks to KAN, GlebsHP, [user:fcspartacm], Levshunovma. Hope to extend the list soon because of testers. Also some problem ideas are mine.

I hope you will like problems. It will be 6 problems in each division.

Good luck and bugless code