Hello, Codeforces!

Last year we enjoyed giving you presents, so we'd like to repeat the MIPT Problems Challenge within the MosCode Festival!

In order to participate you need to create a problem in ACM ICPC format and send it before March, 17, 23:59 (Moscow Time).Don't forget to follow us!

Three winners get valuable prizes:

1st place: Snapchat Spectacles Glasses;

2nd place: XD Design Bobby backpack;

3d place: Marshall headphones.

More information is here: https://goo.gl/NqPZTo

Good luck everyone!