JOI Open Contest 2016

JOI Open Contest 2016 is an IOI-like open competition for students at
schools for secondary education. The main purpose of this contest is
to give Japanese delegations and candidates of delegations an opportunity
for training and practice. But the contest itself is open to everybody.
Everybody is welcome to attend JOI Open Contest 2016!
This year, the contest will be held on 19 June, 2016.
The duration of the contest is 5 hours. The same contests will be held
twice (Round 1 and Round 2). Contestants can participate in one of
Round 1 or Round 2 according to their time zone. After Round 2 finishes,
we will open the judging server for one day. Interested contestants can
improve and resubmit their solutions by themselves.
After the contest finishes, we will fix the standings.
No prizes will be given to the contestants.
Contest duration: 5 hours
The number of tasks : 3 tasks
Language : English, Japanese
Programming Language : C (C11) or C++ (C++11)
You cannot use Pascal nor Java. Details will be announced on the contest
Date & Time :

Round 1
  Sunday, June 19, 2016
  13:00-18:00 +0900 (JST)
  04:00-09:00 (UTC/GMT)
Round 2 (tasks for Round 1 and Round 2 are the same)
  Sunday, June 19, 2016
  19:00-24:00 +0900 (JST)
  10:00-15:00 (UTC/GMT)
Judging Server is open until
  Monday, June 20, 2016
  23:00 +0900 (JST)
  14:00 (UTC/GMT)