How does Xiaoshengchu fill in the voluntary distribution by computer?

At the beginning of junior high school, the computer allocated a place to fill in volunteers: if the first volunteer chooses No.5 Middle School or No.7 Middle School, the second volunteer chooses one from No.33 Middle School and Shuguang Middle School, and the tenth middle school is the third volunteer.

Xiaoshengchu allocation is a common admission method in Beijing Xiaoshengchu. There are two ways to start allocating places in junior high school. The first way is to push gifted students to allocate places in the first round of key middle schools in the city, that is, small allocation, and the second way is to allocate places in the second round of the city, which is usually called large allocation. Generally speaking, junior high school allocation refers to large allocation, which is computer allocation.