Hello, Codeforces.

Soon, on 27 june at 17:00 MSK regular, 310-th Codeforces round will take place. Problems have been prepared by me, Andrey Sergunin, and Egor Shcherbin (Lord_F).

We want to thank Max Akhmedov (Zlobober) for helping us preparing the contest, Maria Belova (Delinur) for translating statements in English and Mike Mirzayanov (MikeMirzayanov) for great Codeforces and Polygon systems.

Participants will be given five problems and two hours to solve them. Scoring will be announced later.

Good luck everyone!

This round will use the dynamic scoring.

UPD: Due to technical reasons round is delayed by 10 minutes.

UPD: The preliminary version of an editorial was posted.

UPD: Congratulation to the winners:

Div 1

1. qwerty787788

2. Petr

3. Haghani

4. KADR

5. zxqfl

Div 2

1. onufryw

2. munaiyi

3. _h_

4. Chenyao

5. mhadih