At first I was just looking at you, pretending to be casual but my mind was drifting away. I was secretly happy that you didn't notice me hiding in the corner.

"Here are the rules. Now every student has a hat in hand. Please look carefully, remember the number on your hat, and then put it on." Dai Maojun began to explain the rules.

"In a moment, Teacher Dai will randomly call out a number, and the students must quickly run and form groups within 10 seconds, and use addition to ...