Since the beginning of the school year, Zhang Yi has never taken a class, and the high school self-examination is not the same as an ordinary full-time undergraduate.

In a large lecture hall, hundreds of people are in class together, and the teacher has no time to check attendance by name, and whether he is willing to go to class depends on the students' consciousness.

The content is a function, which is very cumbersome and difficult.

In his previous life, when Zhang Yi took high math classes, it was like listening to a book from heaven.

I have a poor foundation in mathematics and I am not interested, so I am getting worse and worse, and the worse I am, the more unwilling I am to learn, forming a vicious circle.

What about him now? Listening to math class, he finds it very pleasant, even more than he is happy with computer programming.

Looking at the numbers in front of you, with your own mind, being arranged at will, simplified at will, and straight to the core, the satisfaction is incomparable. What's more, easy-to-expand, easy-to-maintain functional programming is a direction for modular programming in the future.

In fact, in addition to a solid programming foundation, the most important thing in software programming is the level of mathematics.

Software programming is like a system engineering, the soul is the algorithm, and the algorithm can best reflect the level of mathematics. It allows you to learn the easiest way to reach your goals.

Since his rebirth, Zhang Yi's programming skills have advanced by leaps and bounds, but he does not have an intuitive impression of his current mathematical level, that is to say, he does not know how far his mathematical level has become.

So, deliberately choose a high math lesson to test it.

The content of the teacher's lecture is very simple, and he even has an illusion: if he goes on stage to speak, he may be more thorough than the teacher, and a simple example problem will pass through his mind, and there are no less than 10 ways to solve the problem.

It was so easy that I simply gave up continuing to listen to the lecture and quickly flipped through the textbook.

In the high number of books, pages and pages of content quickly passed in front of his eyes, and Wang Xiaoming next to him looked at all this, not knowing what he was doing: Do you practice flipping books at a speed?

It's a thick book, Zhang Yi quickly finished it, shook his head, put down the book, and sighed: The smart hard disk in his mind is really terrible, it used to be as difficult as a sky-high number for him, but now in his opinion, it is really a piece of cake.

Towards the end of class, the chubby math teacher left a problem on the blackboard, the content of which was a problem about the method of finding the limit value of a function, and the teacher bluntly said that if he could solve this problem, he would have some privileges.

A few students asked curiously what the privilege was, but the math teacher didn't say it explicitly.

Zhang Yi suddenly remembered that in his memory of his previous life, there seemed to be such a thing, saying that there was a grade, more than 100 students in three classes, and only one student, and it took a week to think of a way to solve the problem, and then this student went to participate in some competition on behalf of the school.

After that, there was no news of the student. It seems that I heard that I followed a famous math master and made some kind of model.

After thinking about it carefully, he is often away from school now, and he really needs some privileges, otherwise, it will be an annoying thing to be caught by the teacher by the pigtails.

So, he raised his hand, and the fat teacher's expression was a little surprised.

Could it be that as soon as the question is asked, some students come up with the idea of how to solve the problem? This is impossible!

You know, even if he is engaged in mathematics, he didn't come up with a way to solve the problem, but only after seeing the standard answer, he suddenly realized.

It's useless to guess now, it's a mule or a horse, just come out for a walk.

Motioned for Zhang Yi to come to the podium.

When he came to the podium, he picked up a piece of chalk and was about to solve the problem on the blackboard. The fat teacher stopped him, curiously handed him a pen, and gestured to the manuscript paper on the podium.

Without thinking, he casually wrote a few lines of the problem-solving process on the manuscript paper, drew a schematic diagram, and then handed the pen to the fat teacher.

Grabbed the manuscript paper in surprise, and the fat teacher muttered in his heart: It is impossible to be the answer in the process of solving the problem in these few lines.

The steps to solve the problem are outrageously simple, and the fat teacher can't understand the problem-solving process, but the answer is correct.

He suppressed his shock, carefully looked at the diagram next to him, combined with the steps to solve the problem, and immediately understood the idea of solving the problem.

In the 21st century, this problem has been mentioned in many algorithm books, and it is a specific case of mathematical models applied to computers.

Zhang Yi is extremely familiar with this problem, coupled with his current proficiency in mathematics, even if he puts aside the memory of his previous life, he can now come up with at least five algorithms to solve this problem.

The more I look at it, the more I like it, the more I like it, the process of solving this problem is simple and clear, and the thinking is unique, which makes people who like mathematics look very comfortable.

It is much stronger than the standard answer that the old professor has shown himself, not on the same level.

He didn't care about the full class of students, hurriedly pulled up Zhang Yi, and left directly.

The students in the class stared at each other, and before the end of class, the teacher ran away directly, what is the situation, whether to get out of class or not, this is a difficult question to answer.

Some students don't care, they just pick up their books and leave, and in the envious eyes of their neighboring classmates, they go away in style.

Zhang Yi was dragged by the fat teacher to an office with the vice principal's sign hanging at the door, and behind the desk, there was an old man with gray hair, wearing a pair of reading glasses, who was reading at the desk.

He raised his head, glanced at the fat teacher and Zhang Yi who disturbed him unhappily, and said softly: "Wait for me for a while!"

The fat teacher let go of Zhang Yi's hand, very unceremoniously, found two paper cups, poured a glass of water for each of them, signaled Zhang Yi to drink water by himself, and then grunted a glass of water to relieve the hunger and thirst caused by walking in a hurry.

After a while, the old man screwed the cap of the pen, put down the pen, and looked up at the fat teacher.

The fat teacher didn't speak, took out the scratch paper that Zhang Yi had written the problem solving process just now, and handed it to the old man.

The old man took the manuscript paper with a puzzled expression, his eyes were very casual at first, and the more he looked at it, the more shocked he became.

Finally, my hands trembled a little. He muttered to himself: "There is such a genius solution, incredible, incredible, incredible!"

After being excited for a while, I noticed the fat teacher and Zhang Yi standing next to me, staring slightly and saying, "Xiao Zhao, is this problem solved by this student?"

"Yes, Elder Yan, I finished the question, and in less than five minutes, he gave me the answer and the solution idea!"

The old man looked at Zhang Yi in disbelief, speechless in shock. How could it be in less than five minutes!

"Classmate, do you have any other way to solve this question?"

"Elder Yan, there are several ways! I think this one on the manuscript paper is the easiest and the fastest. ”

"Can you name a few other methods?"

"Absolutely. ”

Zhang Yi took the manuscript paper, wrote and scratched on the back for a few minutes, checked it without checking it, and handed it directly to the old man.