Leng Bingling didn't speak. She looked at him and opened the "Olympiad in Informatics" at will. After taking a look, she then input a lot of code in the computer and stood up. "Try to improve this program."

Leng Bingling glanced at the book he closed and then looked at the code on the full screen of the computer.

She was stunned. This problem was the real problem of the preliminary competition of noip popularity group last year. She spent 3 minutes at home last night to improve this problem.

She opened her mouth and wanted to say that I had done this problem, Miss Yao.

She hasn't said it yet. Yao Guofeng said before her, "you do it. I'll see how their programs are completed. I'll come in ten minutes."

Then he stood up and paused, "if you don't understand, you can call me." then he left whether Leng Bingling understood or not.

Leng Bingling looked at the monitor and the teacher called perfect. Then she would do it.

She stood up, walked over and sat in the position where teacher Yao had just sat, lowered her head and clattered on the keyboard. She would be perfect in less than two minutes.

She looked up, turned around and wanted to cry, "Miss Yao, I've finished."

Seeing that teacher Yao was explaining to a student, she was embarrassed to bother. She turned around, glanced at the book on the desktop, and casually drew a book called "algorithm competition classic" to see it.

After about three minutes, Yao Guofeng's voice sounded in her ear: "didn't I ask you to improve that problem just now? What book are you reading?"

Leng Bingling slowly raised her head and wanted to tell him, "it's done."

Before saying anything, ganbo sitting in the back said, "teacher Yao, I have a bug here and I need your help."

Yao Guofeng heard ganbo call him. He looked a little dissatisfied and said to Leng Bingling, "you finish the problem just now, I'll come later." then he turned and left.

Leng Bingling had to take back her words to her lips.

Lower your head and continue reading.

She reads books much faster than ordinary people. In less than three minutes, she has read 10 pages. She can basically master the contents. She wants to operate with the computer and look up at the computer. The teacher hasn't come to accept the questions she just finished, so she has to lower her head and continue reading.

Suddenly there was a flash of lightning and thunder. The thunder was loud. She was startled. She sat right next to the window. Looking out of the window, it was just the school playground. She quickly stood up and closed the window. Looking out the window, it was dark and the playground could not be seen clearly. It seemed that the rain would not stop in a short time.

She frowned slightly. After class, she would rush home in the rain.

Yao Guofeng came over and saw Leng Bingling staring out of the window in a daze. He was more unhappy. He cleared his throat and gave a "um" sound.

Leng Bingling heard his voice slow down and sat back in her chair.

Yao Guofeng glanced at her desktop. The computer had a black screen. There was a book on the desktop. He glanced at the book "algorithm competition classic" on the desktop. He had read 30 pages.

He sighed powerlessly and asked you to do questions, but you found a book to read. I have no opinion if you want to read. Can you find some books you can understand.

Is "algorithm competition classic" your book?

The girl wanted to run without learning.

He looked a little unhappy and asked, "have you finished the perfect topic I asked you?"

"Done." Leng Bingling clicked the mouse, and the completed question immediately appeared in front of Yao Guofeng.