The contest duration is 5 hours and there will be 3 tasks. Each submitted source program must be written only in C++. Problem statements will be provided both in Japanese and in English.
You can find the details in the contest page.
The past contests are also available in this page. Since the judge server isn't available after the contests, please download the testcases when you want to test your code.
Good luck and have fun!
UPD : The third round will be held from 15:30 UTC.
UPD2 : Reviews, sample sources and test data are uploaded to the contest page.