Hello Codeforces!

The series of Educational Rounds continues thanks to the support of the Neapolis University Pafos.

On 03.04.2025 17:35 (Московское время) Educational Codeforces Round 177 (Rated for Div. 2) will start.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 problems and 2 hours to solve them.

The round is based on the problems from the Open Championship of Karelia in competitive programming.

The problems were invented and prepared by Galina Galina_Basalova Basalova, Valentin Valentin_E Ermishin, Lev robotolev Provotorin and me.

I would like to thank the authors of the championship problems whose tasks were not included in the final set for the round: Ruslan r314 Alkin, Yuriy basalov_yurij Basalov, Alexey ashmelev Shmelev, and Nikolay Nicola95 Ermolin.

I would also like to express my sincere thanks to the round coordinators: Ivan BledDest Androsov and Mikhail awoo Piklyaev for improving the quality of the problems and helping with their preparation.

Big thanks to our testers: Brovko, deni1000, KIRIJIJI, shnirelman, Alenochka, slash0t, LightSky, infinite_meltdown, Knh_era, M1chail, Antithesis, Kolychestiy, neohacker for their valuable advice and suggestions!

And of course, huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!