Hello everyone!

The Call for Tasks for the EJOI 2026 submission deadline has been extended to 17th May 2026, Sunday.

All received submissions will be reviewed in the coming weeks, and applicants will be notified whether each of their submissions has been selected for the problem set.

Please send your problems and ideas to ejoi26tasks@uoi.ua.

All the details about the submission process and the requirements are available via the link https://www.ejoi2026.lmio.lt/callfortasks.

Hello everyone!

The Call for Tasks for the EJOI 2026 is open.

Please send your problems and ideas to ejoi26tasks@uoi.ua.

All the details about the submission process and the requirements are available via the link https://www.ejoi2026.lmio.lt/callfortasks.

UPD: the submission deadline has been extended to 17th May 2026, Sunday.

Hello everyone!

Codeforces Round #407 for both divisions will happen on Mar/29/2017 19:05 MSK.

The problems were prepared by me (Ihor Barenblat), Stanislav giraffeh Tomash and Anton arsijo Tsypko. Great thanks to Ivan Fekete Fekete, Adalbert Adalbert Makarovych, Roman chyckchyryk Derkach, Vladislav winger Isenbaev and Alex AlexFetisov Fetisov for testing the round, Nikolay KAN Kalinin for his help with the round preparation and Mike MikeMirzayanov Mirzayanov for the Codeforces and Polygon systems.

As usual, contestants will have 2 hours to solve 5 problems. Scoring will be announced closer before the round.

Hope that everyone will find interesting problems. Good luck!

Scoring distribution:

Div2: 500-1000-1500-2250-2500

Div1: 500-1250-1500-2000-2250

UPD. Editorial is published.

Congratulations to winners:

Div.1:

1. -XraY-

2. Um_nik

3. EvenImage

4. YuukaKazami

5. Syloviaely

Div.2:

1. KacaMG00

2. LAGBOYDaD3zZ

3. __W__

4. GoogleBot

5. shas20