JOI Open Contest 2017
This is an IOI-like open competition for students at schools for secondary education. The main purpose of this contest is to give an opportunity to Japanese delegations and candidates of delegations for training and practice. But the contest itself is open to everybody. Everybody is welcome to attend JOI Open Contest 2017!
The duration of the contest is 5 hours. The same contests are 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.
Registration will be open before each contest. A link to the registration page will appear on this page about 30 minutes before the beginning of each contest. Contestants can register on the contest site by themselves from the right before the beginning of each contest until the end of it.
No prizes will be given to the contestants.
Contest Information
- Name
- JOI Open Contest 2017
- Contest System
- CMS
- Contest duration
- 5 hours
- The number of tasks
- 3 tasks
- Language
- English, Japanese
- Round 1
- Sunday, July 2, 2017
- 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, July 2, 2017
- 19:00-24:00 +0900 (JST)
- 10:00-15:00 (UTC/GMT)
- Judging Server is open until
- Monday, July 3, 2017
- 23:00 +0900 (JST)
- 14:00 (UTC/GMT)
Rule
Rules that are same as IOI 2017 Rule:
- There are no release tokens.
- All submissions will receive full feedback.
- Contestants may submit at most once per task per minute.
- Contestants may submit at most 50 times per task.
Rules that are not same as IOI 2017 Rule:
- Each submitted source program must be written in C++ (C++14).
Allowed extensions for source codes are:
- C++: .cpp
- You cannot use Pascal nor Java.
- You may need to write I/O code by yourself. Graders are not necessarily provided for all tasks.
- There are no testing environments. To test a solution you can simply make a full submission.
- Question form is available on a contest server, but no replies are guaranteed.
Contet Site
- The contest is over.
Ranking
Problem Statements
- amusement_park en ja (Time Limit 3s, Memory Limit 256 MiB)
- bulldozer en ja (Time Limit 2s, Memory Limit 512 MiB)
- golf en ja (Time Limit 5s, Memory Limit 1024 MiB)
Reviews
Test Data
Apology
The judge program for amusement_park was wrong in the contest. You can get the correct judge program from the test data section. We are very sorry for this issue.
Questionnaire
- After the contest, please tell me your impressions about the contest. You can access the questionnaire sheet here. Thank you for your cooperation.
Contact
joiopen at googlegroups.com
License
The tasks for JOI Open Contest 2017 by JCIOI (the Japanese Committee for the IOI) is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. If you need a license other than a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0), please ask JCIOI.