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Chapter 30 Shocked Professors
"Really? That's great, then our first problem will be solved?" Xiao Jun smiled.

"Of course, just write this answer!" Yang Qianqian said tenderly, she found that Xiao Jun, who was originally here to make soy sauce, finally impressed her.Before, she felt that although Xiao Jun had good grades in mathematics in high school, he hadn't systematically studied Mathematical Olympiad knowledge.And yesterday's ineffective performance made her label Xiao Jun a 'soy sauce party'.

But now the other party's performance just now, she feels that she can bring him back into the cooperative relationship.He is already qualified to study the next question with her.

"Well, more than an hour has passed now, let's hurry up and study the solution to the second question~" Yang Qianqian said seriously.

"Row!"

"Second question, ask whether there is a function f from positive integers to positive integers such that f(1)=2, f(f(n))=f(n)+n for all n, and f(n is greater than f (n+1))?" After Yang Qianqian finished reading the questions, her face was solemn: "The second question is indeed more difficult than the first question. We estimate that it will take more than an hour to get our ideas. We There is still a third problem that has not been solved, but it doesn't matter, it has only been more than an hour now, and we have enough time."

"Xiao Jun, I don't have any ideas yet, tell me what you think about this question." After Yang Qianqian thought for a minute, she found that she had no ideas at all in her mind.The first question was already difficult for her.She also did it wrong.So this second question was even more difficult and she lost her mind even more.

"My opinion? I already have an idea to solve the problem, I'll write the answer first and then talk about it." Xiao Jun smiled faintly.

"What? You already have the idea to solve the problem so soon?" Yang Qianqian looked at Xiao Jun in shock, almost speechless.Such a difficult Mathematical Olympiad question, did he have the idea to solve it all at once?Even if it is an internationally famous player, it is impossible to be so fast, right?

"Yes."

brush brush...

Xiao Jun quickly wrote the answer on the scratch paper.

After 2 minutes, the answer was written out, which can be called horror.In fact, he is always copying, and of course it doesn't take much time.

"How do you see it?"

Yang Qianqian finally recovered from the shock, took the draft paper and read it.

"Hey~ This problem-solving idea is also amazing!" Yang Qianqian was full of praise after taking a look.

Then after she finished reading it, she almost wanted to scream excitedly. Fortunately, she realized that she was taking an exam, so she finally suppressed the excitement in her heart: "Your answer doesn't seem to be a problem at all."

Although she didn't know how to solve the second question, and she didn't have any ideas in her mind, after reading Xiao Jun's answer, she immediately knew that this question could be answered in this way.

Anyway, she felt that Xiao Jun's answer was perfectly surveyed, so there shouldn't be any major problems!

"Really, that's great. Then I'll start writing the answer to the third question. Please write the answer to the second question on the test paper." Xiao Jun said.

"Karma? You are going to write the answer to the third question... So you have an idea for solving the third question?" Yang Qianqian was shocked again!The way she looked at Xiao Jun changed, as if she was looking at a monster.Did Xiao Jun take Kaiqiao Dan today?Why did he suddenly become a monstrous scholar?

It seems that such a super difficult Mathematical Olympiad problem is as simple as a primary school math problem in his eyes!
Second solution?

"Yes!"

After a while, Xiao Jun quickly wrote down the answer to the third question.

"Look at it."

Yang Qianqian had already accepted the answer in a somewhat dull manner, she was indeed shocked by Xiao Jun today.

After reading the answer, she was amazed again by Xiao Jun's way of solving the problem.After looking at the question through the answer, she felt that this way of solving the problem was completely correct, which meant that Xiao Jun's answer was completely correct and definitely not wrong!

"Huh~ I didn't expect that we only needed one and a half hours to finish the three questions. Maybe we can get the top three this time?" Yang Qianqian was both happy and dreaming.

To be honest, she doesn't have much confidence in today's final, after all, the difficulty of the topic lies here.But Xiao Jun's sudden outburst made her overjoyed.Maybe Wucheng No. [-] Middle School can get a good ranking this year.

Because she looked around and found that apart from Jiangbei High School and Jiangbei University Attached High School who were working hard on the questions, the contestants in the other groups were still thinking about solving the problems so far, and hadn't written at all!
After three hours, the exam was finally over.

Hand in the paper and walk out of the examination room.

Chen Jianyong and Zhou Li outside the examination room immediately ran over when they saw the two coming out.

"How about it, is the topic difficult?"

"How many questions will you do?"

"The questions are very difficult, but we have finished all three questions!" Yang Qianqian reported truthfully.

"What? All three questions have been solved? Haha... that's great!" Chen Jianyong was very excited.

"Student Qianqian, you are amazing!" Zhou Li also gave Yang Qianqian a thumbs up, but Xiao Jun was automatically ignored by her.Because the performance from yesterday is soy sauce.

"Teacher, Xiao Jun solved all three problems!" Yang Qianqian didn't take the credit.

"What?" Zhou Li and Chen Jianyong were both on the spot this time.Obviously did not expect this result.

They were all shocked that Xiao Jun did three questions by himself. Didn't he do nothing yesterday?
Of course, it is indeed something to be happy to see that my students can solve all three questions in the final.

…………

After the exam in the morning, the afternoon and tomorrow morning are the time to correct the paper.Results will be announced tomorrow afternoon.

In the paper correction room, more than a dozen people at the level of mathematics professors are carefully correcting the papers.

"Huh~ This way of solving problems, this way of thinking about solving problems. It's so perfect, it's so novel. Even I didn't think of using this way of solving problems!" Luo Huafeng, one of the teachers who corrected the paper, saw Xiao Jun After reading this test paper, after reading the answer to the first question, I was instantly amazed!
"I think I can give it full marks! I can't find any loopholes in this way of solving problems and answers!"

"Everyone, come and take a look at this test paper here. I think I can give you full marks for the first question! I'll discuss it with you." Luo Huafeng said to the other dozen teachers who corrected the paper.

For a competition of this level, he certainly does not have the right to give full marks on his own. He needs to go through another teacher's review before voting.

Of course, only full marks need such trouble.

Because of the full-score answers, it is very rare to get a full score in this kind of test of the Mathematical Olympiad question type, anyway, it has been very few over the years.

"What? There's a perfect answer?" After hearing this, more than a dozen other correcting teachers were shocked and quickly gathered around.

(End of this chapter)