Participating in a Contest Material

A contest material is a competition-style assignment distributed as a type of learning material. It is placed within the hierarchy of subject → class → material, and it has an open period (division), a ranking, and results.

Participant Steps

1. Open the contest material within the class. The contest description, the problem list (with scores), and the rules are displayed, along with 参加登録 (Register to participate).
2. Press 参加する (Join) for the period you want to participate in. If a password has been set, enter it.
3. When the open period begins, you can proceed to the problem list with 問題一覧を開く (Open problem list). If you keep the screen open before the start, the problem list will open automatically at the start time.
4. Solve each problem and submit. The method for solving is the same as in Solving a Coding Problem.
5. At the top of the screen, ランキング (Ranking) lets you check your rank, score, and the correct-answer status of each problem. 自分の提出 (My Submissions) lets you review your own submissions.

Meaning of the Displayed Information

• 得点 (Score): The total of the scores of the problems you answered correctly.
• 順位 (Rank): Determined by total score in descending order. In case of a tie, the participant who submitted earlier ranks higher.
• Incorrect submissions incur no penalty.
• ランキング (Ranking) can be viewed by participants after the start of the period they joined, and by non-participants after the end of all periods. Contest administrators can view it at any time.

For Administrators (Creating a Contest)

• Contest materials are defined in a *.contest.yaml file within the learning material repository, just like regular materials (they are not created or edited on screen).
• In addition to settings such as available languages, the definition file describes the divisions (open period and password) and the referenced problems (scores).
• Contest administration rights belong to the administrators of the subject/organization to which the contest belongs, or to administrators set individually for each contest material.
• Administrators for an individual contest material are specified by listing email addresses as an array under adminEmails in the *.contest.yaml file.

  name: 第10回SangiHackChallenge
  adminEmails:
    - organizer1@example.com
    - organizer2@example.com
  divisions:
    - id: main
      name: 本戦
      openedAt: '2026-06-17T15:45:00+09:00'
      closedAt: '2026-06-24T09:00:00+09:00'
  problems:
    - id: sangi10p_01_rectangle
      score: 100
  

• Only email addresses of accounts already registered in Exercode can be specified in adminEmails. Unregistered email addresses are skipped during import.
• Email addresses have leading and trailing whitespace removed and are matched case-insensitively. Specifying the same email address more than once still counts as a single administrator.
• When re-importing, the contents of adminEmails are treated as the source of truth. Users who were previously administrators but are not included in the current adminEmails will be removed as administrators of that contest material.