"No, I don't have an opponent. Shen Qi said.

"You're only 10 points, and you're 20 points. Zhou Yu'an retorted.

"Math is not for competition. Shen Qi shook his head.

"Then why did you participate in the Olympiad?" asked Zhou Yu'an.

"No reason, just fate. Shen Qi said.

Zhou Yu'an: "I'm @¥*@!"

"Hey, Shen Qi, Zhou Yu'an, what are you two muttering? Please pay attention to the discipline of the math camp!" Sun Erxiong reminded, and then pointed to the projection screen: "Please look at the fourth question." ”

Ooh.

The students in the audience let out a strange sigh, what the hell is this?

A bottle is displayed on the screen, a bottle made up of curved surfaces and curves.

The slender neck of the bottle twists and extends, and strangely, the bottle body is not pierced, and the neck of the bottle enters the bottle and sticks to the bottom of the bottle.

The bottle is boundless, inside and outside, and it seems that such a bottle should not exist in three-dimensional Euclidean space.

There is a one-sentence prompt on the screen: "The bottle is one-sided, and its one-dimensional connectivity is 3, i.e. the deficit is 1." ”

"Give you 1 minute to understand this diagram. Sun Erxiong said.

All the students showed puzzled expressions, except for Shen Qi.

After 1 minute, the projection screen switches to a new screen.

The new picture is a circle, which is not unremarkable, it is the common kind of circle, and the diameter of the circle is represented by a dotted line within the circle.

"Ladies and gentlemen, please listen to the question, let me tell you that this surface is closed, and its connection number is 1, so what is its deficit? Give you 1 minute to think. Sun Erxiong said.

Ay......

The students laughed bitterly, this thing is so abstract, who can understand it?

Brush!

Shen Qi raised his hand, and 10 seconds passed at this time.

"Yo, Shen Qi, have you learned to answer?" Sun Erxiong was a little surprised.

"Teacher Sun, isn't this just the rush to answer the question?" Shen Qi asked rhetorically.

"Yes, yes, my brain is cramping. Sun Erxiong smiled and said, "Please tell me your answer." ”

Shen Qi gave the answer: "The deficit of this closed surface is 0. ”

Sun Erxiong asked, "Why?"

Shen Qi: "From the conditions given by the Klein bottle in the previous figure, we can deduce that the topological representation of this closed surface is a circular domain, that is, the circumference of this circular domain is connected with the boundary of a Morbius belt, and its connectivity number is 1, so the deficit is 0. That's it. ”

Bang bang bang.

Sun Erxiong applauded, and then asked the students in the audience: "Can you understand Shen Qi's explanation?"

"Can't!"

"This TM, who can?" Zhou Yu'an asked speechlessly and stared at Shen Qi, he had been selected for the national team of the Olympiad, but he couldn't even understand Shen Qi's explanation.

Shen Qi smiled and didn't explain.

Sun Erxiong: "If you can't, you can't, Shen Qi gets 10 points, everyone else gets 0 points, next question." ”

Ou Ye turned his head and glanced at Shen Qi, Shen Qi looked at her for a second, calculating Ji, mathematics is not just a simple addition, subtraction, multiplication and division or faster than anyone, can you understand?

Here's what happened next.

"Shen Qi scored 10 points!"

"Oye scores 10 points!"

"Shen Qi scored 10 points!"

"Shen Qi scored another 10 points!"

"Oye scores 10 points!"

......

Shen Qi and Ou Ye entered heads-up mode.

Pure numerical calculations, quick calculations, Ou Ye is always the first to raise his hand and give the correct answer.

Shen Qi accepted all the types of questions that required strong logical deduction, understanding of abstract figures, and comprehensive use of various mathematical knowledge.

After answering the 11 questions, Shen Qi scored 70 points, Ou Ye scored 40 points, and the remaining 24 students scored 0 points.

Hit, hit hard. The other 24 students have never felt such a failure, Shen Qi and Ou Ye, a man and a woman, are very perverted, playing logical deduction and abstract concepts, they can't play Shen Qi. Playing mental arithmetic and quick arithmetic with a huge amount of information, they can't play Ouye.

"Okay, last question, question 12. Sun Erxiong has a general understanding of the real level of the 26 students, and Shen Qi, the IMO perfect score champion, really deserves his name, and Ou Ye, the only girl in the math camp, has her own unique arithmetic skills. The remaining twenty-four trainees, well, need to be further observed.

"The last question will not be projected on the screen, I will dictate. Sun Erxiong said, "So you have to prick up your ears and listen carefully, I can give you a little hint, the last question is pure mental arithmetic, especially simple, primary school students who have learned mental arithmetic can immediately give the correct answer, this is a way to send the question." ”

Everyone in the audience is gearing up to send points to the questions, then you have to get points, it's too embarrassing to have zero duck eggs, where have they ever scored 0 points in their respective high schools, full scores are normalized.

Shen Qi closed his eyes and said softly: "I have already scored 70 points, I am very tired, I will give up the last question." Zhou Yu'an, come on. ”

"Okay, I will definitely defeat Computing Ji!" Since stepping into the Peking University Mathematics Camp, Zhou Yu'an, a national number player, has been holding his stomach, and he is determined to win the last question.

"Little guys!" Sun Erxiong shouted in a tone, "It's all for my old grandson, 725 times 18 divided by 25 times 337 and subtracted by 109 and then divided by 5, how much is it?

Brush!

Brush!

Brush Brush Brush!

A dozen or twenty arms brushed and raised.

"Zhou Yu'an, you raise your hand first, come, please give your answer. Sun Erxiong looked at Zhou Yu'an and made a gesture of please.

Zhou Yu'an was very excited, and when Shen Qi abstained, he finally grabbed the right to answer a question, which was not easy.

Steady and steady, Zhou Yu'an said confidently: "My answer is, twenty-eight thousand three hundred and thirty-one. ”

"Wrong! Zhou Yu'an deducted 10 points, and the final score was minus 10 points!" Sun Erxiong drank.

"......" Zhou Yu'an almost fainted, why is life so difficult!

Shen Qi suddenly opened his eyes: "Zhou Yu'an, you idiot, waste dog, can you be wrong?"

Life is already so difficult, Shen Qi, don't you break it down anymore, okay?

Zhou Yu'an covered his face and didn't speak, minus 10 points, meowed, I have never scored negative points in my life, it's a shame.

"Ou Ye, you are the second hand to raise, please continue to answer, quickly, immediately!" Sun Erxiong looked at Ou Ye.

Ou Ye said slowly: "Thirty-five thousand one hundred and sixty-one. ”

Sun Erxiong: "The answer is correct, Ou Ye gets 10 points! Today's general knowledge test and mathematics professional test are all over, this class is a thorough test, don't be nervous if you have nothing to do, everyone can rest in the classroom for 20 minutes, you can also go out for a walk and go to the bathroom." ”

After speaking, Sun Erxiong and his assistant turned off the projector and left the classroom.

"Shen Qi, the scores of the general knowledge test and the mathematics major test must be recorded, right?" Zhou Yu'an asked anxiously.

"Didn't Mr. Sun say it all, just get to the bottom of it, don't be nervous if it's okay. Shen Qi comforted.