Nine bedrooms are divided into four:
Nine dormitories are randomly divided into three groups to compete at the same time! Three groups of champions are promoted, and the runner-up is three in one. So four bedrooms came out.
Four bedrooms determine the top three:
AB two groups, the group champion advanced to the final, and the runner-up competed for the third place! !
In this way, several dormitories can compete at the same time, make full use of the venue, save time, and be fair and just.
! !