Tomorrow, we have JOI Open Contest 2015 .

This is OI-like contest on CMS and prepared by Japan to practice IOI.

There are two rounds using same problems. You can participate whichever you want.

The first round is 04:00~09:00 GMT June 14, and second round is 10:00~15:00 GMT on same day. And since the server will be open until 14:00 GMT June 15, you can practice this round at any time until then.

Please don't talk about problems until second round will be over. I'm looking forward to see a lot of IOI-er and programming contest lovers at this contest!

UPD1: Contests has been over. It is free to talk about the problems from now. You can still practice until the server will be closed.