I reach the pinnacle of life by learning

The news of Barton and Qiao Yu's private dating quickly spread in the University of Melbourne.

Although there were not many people in the reading room at that time, there were still a few after all.

And among these few people, as long as there is one unobstructed population, the result will be hundreds of people collectively eating melons.

The leader of the US team fell down in anger when he heard the news.

"Where is Barton, call Barton!" The team leader rubbed his brows and said to the deputy team, "God, what is going on here?"

A few minutes later, Barton came in Oxford shoes.

He is skipping high school.The other players are almost adults, Barton is less than 16 years old.

His outline is between a teenager and a young man, with a kind of indistinguishable beauty, but the irritability in his eyebrows and eyes abruptly destroys that beauty.

After the team leader saw him, he became a little misfired.

He put his hands behind his back, turned around twice, then turned around, and said: "I heard that you are going to fight with the players of the Huaguo team? He apologizes if he loses, and you retire if you lose?! God, my team, I actually heard the news from someone else, am I too indifferent to you on weekdays?"

Barton's eyes suddenly filled with disgust: "It's not a fight, it's a competition, an academic exchange."

What's more, fighting is a shameful thing, and you will be suspended.

The team leader suddenly raised his head and said, "Enough! IMO requires 6 players to participate. If you withdraw from the competition, where can I find another contestant?"

Barton's eyes widened, like a provocative cat furrowed: "You mean you think I will lose?"

The team leader quickly argued: "Of course not. I'm just saying, if..."

"No if, coach." Button interrupted him, "I just want him to apologize to me. Since that oriental man is so confident in himself, he should bear the consequences of his confidence."

After saying this, Barton walked away, leaving the people in the small meeting room looking at each other in blank dismay.

"Forget it, don't think too much." Team member Justin said, he looked like he hadn't woken up, and his whole body was lazy, "Anyway, Barton won't lose."

On the other side, Li Chujie was also hesitant and speechless.

"I don't think you are very impulsive." Li Chujie sighed with a gentle expression, "How did you conflict?"

He looked very much like the class teacher who knew the elementary school students in the class were fighting, so he started to investigate the cause of the dispute.

Chu Xining, who had known what happened in advance, replied first: "It was that Barton who cursed first."

Li Chujie's voice paused: "I think you young people are still too impulsive. The traditional virtue of our Chinese nation is that peace is the most important..."

Qiao Yu replied blankly: "He called me gg."

Li Chujie gritted his teeth and rolled up his sleeves: "I really appreciate your way of dealing with opponents before the competition."

When he was studying abroad, he often encountered such stinky idiots.

A contestant who didn't know why raised his hand: "Teacher, what is gg?"

Li Chujie: "It's a homonym for 'Qing Dynasty'. Many Chinese people were sent to study abroad in the late Qing Dynasty and the early Republic of China. They claimed to be from the Qing Dynasty, so 'Qing Dynasty' became a synonym for Chinese people, with a derogatory meaning. In our context, and Words like 'foreign garbage' are similar."

The commotion caused by this literary fight not only spread among the players, but also caused a sensation in the circle of referees.

"It's been a long time since I encountered such a wonderful thing." In the afternoon tea room, a British referee Allen smiled and said to the rest of the people, "But is IMO allowed to withdraw midway?"

Another referee, Joseph, replied: "A player had an allergy from eating nuts by mistake before. He was hanged in the hospital for a week and didn't recover, so he temporarily retired and replaced him with another player."

"Barton, I'm very impressed." Allen, who was holding a ceramic cup, narrowed his eyes slightly. "I was also one of the judges in the Harvard-MIT math competition before."

That was last year. Barton was 14 years old, a freshman in high school. He looked like a child, that kind of pretty little girl.

Allen was very impressed by both his appearance and his final grades.

As for the other party, Qiao Yu.

Allen had never heard of it. If this was a marketing campaign, then Qiao Yu would undoubtedly be very successful.

At least relying on Porcelain Button, let the contestants and most of the staff members of this year know his name.

Huaguo has always been known as a mathematics desert. Even though they rank among the best in various international youth mathematics competitions every year, looking at the current mathematics world, the top mathematicians in Huaguo are only in the second echelon.

The Fields Medal is regarded as the Nobel Prize in mathematics and is only awarded to young mathematicians under the age of 40 who have made outstanding contributions.

Although there are also two Chinese winners, Yau Shing Tong and Tao Zhexuan, but the number of people with Chinese nationality here is 0.

It is also a very interesting phenomenon.

Since we make friends through literature, we must also judge heroes through examinations.

With the acquiescence of the competition committee, the competition time was set from 2:5 p.m. to [-]:[-] p.m. on Wednesday.

There are three questions in total: Algebra, Number Theory, and Geometry.

In the corner of the University of Melbourne, a classroom was vacated and used as a competition venue.

Questions are selected from a bank of past exam questions. Every year in the IMO competition, there are more than 200 questions as candidates, and 6 questions are finally voted on.

A considerable part of the topics that were not selected were because they were too difficult and no one chose them.

Observers from weaker countries will never push their own players into the pit of fire.

But in this private match, the referees don't have such concerns.

"This question is not bad. I took it to the college students I brought to solve it, and there were only 3 people in the class who got it right."

"To be honest, I don't approve of personal grievances being resolved in this way... Wait, it seems that I wrote this question. Last year, you all scolded me for being stupid!"

Joseph showed dissatisfaction on his face: "Alan, I suspect that you are biased. You know that Barton's number theory is very good, but the number theory you chose is too difficult. Can't you give our lovely Huaguo boy some face? "

Allen's smile is meaningful: "The world of mathematics is cruel."

Qiao Yu enjoyed the treatment of the game in advance.

In the spacious classroom, there were only two contestants, he and Button, and the seats were several meters apart.

Sitting on the podium was Alan, the invigilator of this competition.

Alan is 36 years old this year. He studied at Hatton Middle School, a famous British aristocratic school in high school. His undergraduate degree was in the Department of Mathematics of Princeton University, and his postgraduate degree was in the Department of Finance of Harvard. ,unmarried.

By the way, he used to be Li Chujie's direct senior, but the two had no personal relationship, only they had heard each other's name.

Now, he can sit here as a referee, but Li Chujie is only the leader of a national team.It can only be said that choices are different, and life circumstances are not the same.

The choice he refers to is that Li Chujie rejected the invitation of Berkeley University and returned to China to do research instead.

I can be so busy just for a job title, and the basic salary I get is even more pitiful, I don't know why I can't think about it so much.

The smile in Alan's eyebrows suddenly deepened.

It's 2 minutes until 3pm.

In front of Qiao Yu was a tablet computer and an electronic pen.

The topic is on the tablet.

In addition, there is a blank sketchbook and a signature pen.

I heard that this is also the idea of ​​the competition committee. The handwriting written on the tablet can be viewed with a 15-minute delay over the Internet.

Committed to making every melon eater stand on the front line of melon eating.

Qiao Yu tried it out, writing on the tablet was slippery, with no pen sharpness, and was very unhappy.

Qiao Yu said to the system in his heart: "I remember at the beginning, even when I competed with that man named Sun Rui in the bookstore in English, I was given some rewards. Now that I am standing in the international arena, shouldn't you give me some rewards?" Task?"

The system was silent for a moment, and reluctantly spat out a sentence: "[System Quest] beat Barton Smith in a personal competition. Quest reward: 150 points, no penalty for failure."

Only then did Qiao Yu feel satisfied.

It seems that winning a Patton is about the same difficulty as teaching a Bensheng in the eyes of the system.

The system defended Button in a low voice: "No, it will be much more difficult to beat Button."

"With all due respect, host. Your initial intelligence value is 100, and now it is 140.1. But Barton's current intelligence value is 148.7 in the system's judgment."

"Barton's father is Andrew Smith, who was one of the candidates for the Turing Award in 2000, but lost to Yao Qizhi. His mother is a member of the Louis Vuitton family."

"From the age of 3, Barton began to receive systematic elite education, from 6:8 in the morning to 11:[-] in the evening. After he showed his talent in mathematics, Andrew arranged special customized courses for him. [-] At the age of five, Barton regularly published the "Annual Mathematics" under the guidance of his father..."

The so-called talent is nothing but the result of many reasons.

Even if they were born with the same IQ, as the environment is different, the gap will become larger as time goes on.

This system is very good at disturbing the morale of the army.

Fortunately, within a moment, the time jumped to 14:[-] on time, and the system consciously silenced itself.

A question appeared on the tablet, Qiao Yu glanced at it, it was not difficult at first glance, but as he was writing, his pen stopped.

Allen sat at the top to invigilate the exam, but his eyes kept falling on the display screen in front of him.

The screen is divided into two, with Barton's screen on the left and Qiao Yu's screen on the other.

The first question is a proof question. In order to take care of the differences in language and culture between the two, Qiao Yu's question stems are in Chinese, while Barton's question stems are in English.

For the first 15 minutes, neither responded.

However, there is a stark contrast in the speed of pen movement.

Barton wrote quickly on the draft paper, frowning and then relaxed; Qiao Yu wrote slowly, with an extraordinarily calm expression, and only wrote after thinking for a long time, as if he was practicing calligraphy.

People outside the arena were also staring at the screen nervously.

Many people took out paper and pens and started to calculate.

The Singapore team, Lin Zhiyuan and others began to discuss in a low voice.

"I don't even understand the title of this question..."

"I may only be able to write two words, proof."

Lin Zhiyuan sighed: "Fortunately, it's not a formal competition, otherwise it would be too embarrassing... Sigh, I should have stopped Qiao Yu back then."

Barton, a sophomore in high school this year, has participated in the IMO mathematics competition for the second time.

Lin Zhiyuan can still recall the fear of being dominated by Button in the last match.

Barton was the only player with a perfect score in last year's competition, scoring 42 points.He was 14 years old that year.

During the moment when he was contemplating, a burst of exclamation came: "Brother Zhiyuan! Title, look at the title! Barton started writing."

Although the scene on the screen appeared after a delay of 15 minutes, it did not prevent everyone from seeing the problem-solving process.

Barton's process was analyzed very quickly. Obviously, his thinking was clear. He had already completed the answer, and now he is just transcribing it on the tablet.

Lin Zhiyuan watched his problem-solving process, showing a look of sudden realization.

At the same time, exclamations of "Wow" came from the dormitories of countless national teams.

A few minutes later, Barton completed the answer to the first question.A satisfied smile appeared on Allen's face.

At this time, Qiao Yu's answer sheet was still blank.

Li Chujie stared at the screen, his expression unchanged, but he was a little nervous.

"Come on, Qiao Yu." Before he knew it, he actually said what was in his heart.

In the Huaguo team, Su Mingyang, one of the contestants, couldn't help but said: "If you lose, you will be ashamed and thrown abroad."

The 3 boys participating in the Huaguo team are in the same dormitory, and the 3 girls are in another dormitory.

Because of Qiao Yu's good looks, coupled with his good strength, he is very popular in the team, and even Li Chujie has to behave a bit partial, Su Mingyang has long been dissatisfied.

Chu Xining turned his head, glanced at him, and said in a neutral tone, "Your elbows turn out quickly."

That's Qiao Yu.

Qiao Yu has never let him down before, and it won't this time either.

The author has something to say: I found an IMO entry-level test question from the Internet, and posted it here for everyone to experience!I wouldn't do it anyway.

Question 2019: A social network with [-] users, some of these users are friends, and the friendship here is mutual. The following events happen repeatedly among them, and only happen once in a period of time :

There are three users A, B, and C satisfying that A is a common friend of B and C and there is no friendship between B and C. When the event occurs, B and C become friends and A, B, and C both cancel the friendship. Other friends relationships remain unchanged.

At the beginning, there are 1010 users with 1009 friends each, and the other 1009 users with 1010 friends each. Proof: There is an event sequence such that each month has at most one friend after it occurs.