On the second day, the written test competition officially began, the full score of the whole test paper is 200 points, the question type distribution is five fill-in-the-blank questions, each question is worth 10 points, seven answer questions, the first six questions are worth 20 points each, and the last question is worth 30 points.

From the distribution of the scores, we can roughly see the difficulty of the questions, first easy and then difficult, and the score gradually increases.

Although there are a total of seven players in the Huaguo team, two of them are substitutes, and they can only play in the case of accidents in other players, but they are in good condition now, so they are still the five players who were scheduled to participate in the game, namely: Su Qingyun, Chen Zheyu, Chen Ru, Mu Qiu, and Li Siyuan.

The written examination, from dozens of countries and regions, a total of more than 200 participants were all disrupted, distributed in several examination rooms, a total of three and a half hours of examination time.

Three and a half hours to do 12 questions, it seems that there is plenty of time, but in fact the time is very tight, this is not an ordinary topic, the amount of calculation is very large, the difficulty is also very high, from the review of the question, thinking to the real pen It takes a lot of time, not to mention the time to complete the whole question and check later.

For three and a half hours, every participant needs to race against time, but they need to keep their minds absolutely calm, fast and good to get a good result.

Contestants from different countries are in the same examination room, and the language on the test paper is different, so they can't understand each other at all, so the possibility of cheating is basically eliminated.

In the huge classroom, all the participants held their breath and their eyes were fixed on the invigilator on the stage...... On the test paper in his hand, the feeling of unknown made everyone's hearts lift.

After the invigilator handed out all the test papers, he looked at the time and finally said, "The exam has begun, please start answering." ”

Everyone took pens and looked at the test papers.

The first time she got the test paper, Su Qingyun also glanced at all the questions roughly, the questions in front of her, her expression did not change, the question type and test center were basically within her expectations, there was no surprise, before the exam, everyone also sorted it out together, their team did these questions, the problem should not be big, but this last question ......

Su Qingyun raised his eyebrows unexpectedly, and his fingers unconsciously knocked twice on the table, this last question was somewhat interesting.

She thought about it for a while, so she simply skipped the previous question and did the last question first.

Let the positive integer a, b satisfy ab+1 and be divisible by a2+b2, proving that (a2+b2)\/(ab+1) is a perfect square number.

(PS: The topic is from Du Niang, professional knowledge is limited, everyone sprays lightly.) ）

Su Qingyun held the pen in his hand, unconsciously turned it a few times, and then began to start writing.

From the meaning of the title, it can be seen that the positive integers a,b satisfy......

She writes quickly, hardly without any stagnation, very smoothly, as if she already has the exact answer in her head, and now all she has to do is write the answer in her head. Soon, half a page was written.

Behind Su Qingyun was a member of the team from country E, who was facing the fill-in-the-blank question in front of the test paper, scratching his ears and cheeks, constantly calculating on the scratch paper, and unintentionally raising his eyes, he saw Su Qingyun writing the test paper, although he couldn't see what she wrote specifically, but the question was ......

No, why is she just doing the last question?! The members of country E were stunned, and looked at the wall clock on the wall uncertainly, didn't this just start the exam?

After taking a closer look, he found that the place in front of this person's test paper was still blank, and he instantly breathed a sigh of relief, that is, it was just the beginning of the exam, which was too scary.

However, he is also convinced, the order of doing the questions is easy first and then difficult, it is the first time he has seen someone do the test paper from the last question, is it possible that the previous questions are not challenging for her?

This thought only flashed in his mind and then smiled, and then lowered his head and continued to do his own test papers, the most important thing in the exam is to concentrate on yourself and not be affected by others and the outside world.

Time passed minute by minute, Su Qingyun wrote the last sentence, she had completed the last question, she turned the test paper back to the front with a happy expression, and filled in the blanks.

She writes the fill-in-the-blank questions faster, has almost no time to think, and does not need to be calculated on scratch paper, so she writes down the answers directly, and she only spends a few minutes on the five fill-in-the-blank questions, and then continues to solve the questions.

The six answer questions were completed in Su Qingyun's hands, and when he looked at the time, it was only more than half an hour that had passed, at this time, just an hour had passed since the whole exam, Su Qingyun had already put down his pen, and on the test paper, the handwriting was beautiful, neatly arranged, and full of writing, which looked very pleasing to the eye.

After finishing the test paper and not being able to hand in the paper in advance, Su Qingyun stared boredly at the wall clock, turned the pen, and began to be in a daze.

Everyone lowered their heads and worked hard to write, but she was the only one who looked at the wall with her head held high, and the invigilator who was wandering around the examination room quickly noticed this abnormal scene, he frowned, and walked directly to Su Qingyun in three steps and two steps.

The invigilator, who was about to knock on her desk to remind her, was stunned the moment she saw Su Qingyun's test paper, the test paper was densely written, this is ...... Done?

The invigilator subconsciously raised his head, also looked at the time, and fell silent, if he was not mistaken, it has just been an hour since the exam started, right? Is this candidate done?

Isn't that a little too fast? For an hour, whether this was done seriously or casually, the invigilator was a little unsure.

Yellow skin, square words, Chinese? He looked at Su Qingyun carefully again, and suddenly recognized it, he had an impression of this little girl, yesterday at the opening ceremony, this little girl was the youngest among all the participating team members in the audience.

The youngest age, the fastest speed of doing questions, the invigilator is really unsure, after all, it is an exam, he can't say something superfluous, he can only walk away with a stomach full of doubts.

During the rest of the exam time, he had been paying attention to Su Qingyun intentionally or unintentionally, and saw her turning the pen from time to time, and from time to time she was in a daze out the window, and in the end, it seemed that she was really too boring, and she actually ...... Falling asleep on the table?!

The invigilator was stunned and fell asleep? At such an important exam site, she fell asleep?

He looked at the other players who were nervous and anxious, and then looked at Su Qingyun who was lying down to sleep, this strong contrast made him twitch the corners of his mouth, not to mention anything else, at least the psychological quality of this little girl from Huaguo is really strong.

It was not only the invigilator who noticed Su Qingyun, but also other candidates who were struggling to do the questions, looking at the sleeping figure, people were numb, they were so anxious here, how did that person sleep?