During the break, some of us sit in the classroom to blow our hair, and some go out to eat wildly. I sat quietly in my chair, motionless, waiting for the bell to ring. Suddenly, a breeze brushed my cheek, and the bell for class rang "Ding, Ding, Ding". I thought to myself, "How time flies, just like a breeze."

The math teacher stepped onto the platform with a serious face and stared at us intently. After a while, the teacher spit out a few words from his mouth: "Students do their own homework." Some students are beaming, some students are sad, some students look around, while I am doing my math homework happily. I'm doing it, and I have a problem. This question is really a bit difficult. Even Chen Nuo, the encyclopedia of mathematics, can't do it.

I think about it, but I still can't do it. Just when I was depressed, I suddenly thought of a solution. I immediately began to write "swish, swish, swish". After writing, I breathed a sigh of relief and immediately matched my answer with Chen Nuo's. The answer is completely different. I'm dumbfounded. She explained to me at once what this meant, and no matter how much I opposed her opinion, she still disagreed with me. I'm at a loss about what she said, and I can't tell the east from the west. Qiu Yifeng next to him also participated in the thinking. Qiu Yifeng's answer is exactly the same as mine, but the algorithm is different.