Each submitted source program must be written in SQL.
A contestant is a student who:
was enrolled in a school at a level not higher than secondary education in Hong Kong.
The contest is using a online judge system.
There are several tasks in the daily competition. The contestants need to pass all test cases of one question to obtain the corresponding marks.
There is no limit to the number of submissions for each task and no penalty for multiple submissions. Only the last submission of each task counts towards the grade.
For every submission, the grading system reports the score as well as the feedback.
The feedback includes the test case number and one of the following reasons:
During the contest, the contestants can not access the standings or see the real-time ranking.