When Xiao Yuan and the others looked towards Maninan, they also quickly discovered Xiao Yuan and them, so Quan Shu and Bu Ying walked over to them, but Maninan walked towards Liu Dong, who had just arrived.

"Xiao Yuan, I really can't imagine that you are impostors." Coming to Xiao Yuan, Quan Shu said with disdain.

"Whether it's fake or not, you don't count, you have to have the final say." Jiang Hua retorted.

"Hmph, there's no point in taking advantage of your tongue, you're also here to participate in the competition, this is not a selection by the Computer Association, you can get through by cheating, don't be eliminated in the first round, it's too boring." Bu Ying said.

"Well, I'll see who gets the last laugh." Jiang Hua said without showing weakness, and said to Xiao Yuan on the side, "Xiao Yuan, this task will be handed over to you." ”

"No problem." The corners of Xiao Yuan's mouth turned up slightly, and he smiled indifferently.

"Jiang Hua, are these two guys in the same group as the boy wearing the fake Armani?" The little fat man asked loudly on the side, his male duck voice was extremely harsh, which immediately attracted the sideways glances of many people around, of course, what interested them, in addition to the little fat man's male duck voice, more was what he said about the fake Armani.

"yes, they're a bunch." Jiang Hua hurriedly said.

"Fake Armani is not a good person, these two guys are certainly not good things, hey, you go and call the fake Armani, I'll ask him again, why do you call me fat, am I fat?" The little fat man said loudly again, and after a day, this guy is still struggling with this problem.

"What kind of fake Armani, I don't know what you're going to say." Quan Shu naturally knew what was going on with the fake Armani that the little fat man said, but in front of everyone's eyes, he naturally couldn't run over and pull Maninan over, so he could only pretend to be confused, waved his hand and said, after speaking, he pulled Bu Ying and turned away, probably because he was worried that the little fat man would talk about the fake Armani again, and finally shake Maninan out and embarrass him.

"Hey, don't go, you two haven't called the fake Armani for me yet." When the little fat man saw the two leaving, he still didn't intend to let the two go, and shouted loudly.

"Wang Yixing, forget it, it's time for the exam soon, I don't have time to pay attention to that guy." Xiao Yuan pulled the little fat man and persuaded him, and at the same time swept his eyes to Maninan, but found that he was talking to Liu Dong, Liu Dong seemed to be impatient, and he wanted to leave several times, but he stopped him.

"I'll go take a look." Xiao Yuan let go of the little fat man and walked in the direction of Maninan, Jiang Hua saw this and hurriedly followed, but as soon as the two took a few steps, Quan Shu and Bu Ying arrived at Maninan's side, and Maninan turned his head and saw the two of them walking over, and actually let Liu Dong go and let him leave.

Liu Dong naturally also found Xiao Yuan and Jiang Hua, so he walked over to the two.

"Liu Dong, are you okay?" Xiao Yuan asked.

"It's fine." Liu Dong replied, paused for two seconds, and then said, "Thank you." ”

"Hehe, you're so polite, we all regard you as friends." Jiang Hua stretched out his hand and patted Liu Dong's shoulder and said, but Xiao Yuan noticed that Liu Dong's body shrank back, obviously very uncomfortable with Jiang Hua's intimate behavior of patting him on the shoulder.

"Well, it's time to enter the exam room, I'm going over there." Liu Dong seemed unwilling to talk to Xiao Yuan and the others more, so he found an excuse to leave at random.

Xiao Yuan and Jiang Hua returned to Tang Xinyu, Tang Xinyu obviously recognized Liu Dong, and was very curious about their ability to know each other, so he asked, Xiao Yuan did not hide what happened yesterday afternoon, and told Tang Xinyu directly.

Tang Xinyu heard that Xiao Yuan and the two had experienced so many things in an afternoon yesterday, and naturally they were amazed, time passed quickly, just when they were chatting, the time to enter the exam was up, Xiao Yuan and the little fat man got their own admission tickets from Tang Xinyu and Teacher Mei respectively, and walked to the examination room.

There are not many people who come to participate in the mathematical modeling competition, it is divided into two examination rooms, Xiao Yuan and the little fat man are divided into the second examination room, after entering the examination room, Xiao Yuan observed the students who entered this examination room, most of them are green, they should all come from the following high schools.

Since the little fat man entered the examination room, he seemed to be a different person, sitting in his seat and becoming very quiet, his two little eyes were shining and looking around, seeing Xiao Yuan looking at him, he also raised his fist to Xiao Yuan and made a cheering gesture.

Soon after entering the venue, the invigilator walked in with a sealed test paper bag, first handed out two large pieces of straw paper, and then opened the test paper bag and began to distribute the test papers, and at the same time told Xiao Yuan that they should write their names first, and then read the questions, and they were not allowed to answer the questions until the test started.

Xiao Yuan received his own test paper, this is a test book, there are twenty pages thick, but there is only one question, this question is to let the candidates find the quantitative relationship contained in the twenty-page description, and abstract it, get a mathematical model to solve the problem, and then write the computer description pseudocode of this mathematical model.

The so-called mathematical modeling, is to abstract the quantitative relations contained in some phenomena in reality, and summarize the general mathematical methods to solve such problems, and the mathematical methods to solve general problems are mathematical models, for example, many problems in our reality can be described by using a quadratic equation, different problems, the quadratic equations that can be obtained are different, but we can summarize the general form of a quadratic equation from the specific quadratic equations. The general form of a quadratic equation is a mathematical model, and we can solve a large class of problems by studying this general form.

From the perspective of mathematical abstraction, any phenomenon in the real world and the essence hidden behind it can be described by mathematical models, so mathematical models are the basis of all natural sciences and even social sciences, for example, in physics, Newton described macroscopic classical mechanics as three fundamental laws, these three fundamental laws are actually three mathematical models with close practice, Einstein quantified the relationship between time and space, and described it as the theory of relativity. The theory of relativity is also described by a complete set of mathematical formulas, which are mathematical models that describe the relationship between time and space, such as Newton, Einstein and other physicists, using mathematical models to describe physical laws and revealing the essence of physics, economists use mathematical models to describe the economic activities of human society, and computer experts also use mathematical models to describe the nature of computers, etc.

Of course, Xiao Yuan's problems to solve will not be as abstract as the problems solved by Einstein, Newton and others, they only need to describe the phenomena described in the test paper with mathematical models, and transform them into the final program pseudocode, due to the flexibility of the questions, each student according to the twenty pages of the article, the mathematical abstraction may be different, and even the degree of abstraction is high and low, and some students may summarize a local problem from the long problem description. Some students may consider a more comprehensive problem and summarize a more representative problem, so whether the student considers the problem comprehensively and how high or low the degree of abstraction is has become the basis for judging a student's performance.

The exam time was three hours, Xiao Yuan spent an hour, carefully read through the twenty-page article twice, spent half an hour abstracting the quantitative relationships in the article, and then spent forty minutes abstracting a mathematical model from these quantitative relationships, and finally spent the remaining fifty minutes, he spent half an hour writing the pseudocode to solve this mathematical model, and when there were still twenty minutes to end the exam, he raised his head from the test paper, let out a long breath, and then looked around, I found that almost everyone in the examination room, including the Olympiad Gold Medal winner who signed up at noon yesterday, was thinking hard, except for one person, and that was the little fat man.

When Xiao Yuan looked at the little fat man, he was spinning the pen boringly, as if he had a sense, he also turned his head to look at Xiao Yuan, and squeezed his eyes at him, with a relaxed face.

"This guy is really not a normal person, although his EQ is a little low, but his high IQ is scary."

Xiao Yuan sighed secretly, it was obvious that the little fat man had already done it, but he didn't know what the mathematical model he abstracted from the twenty-page article was, and how high the degree of generalization was.