"Wow, I knew that."

"Teacher Zheng is ...... again"

"Simple-sounding math problems...... But why do I feel like my brain is not enough? Am I really a high school student? I'm scrapped. ”

"I can't even answer such a simple question for junior high school students...... What is the point of my life. ”

Does anyone know the answer? Yang Ning. ”

Yang Ning stood up.

"Teacher...... I...... This question...... I...... I haven't figured it out yet. ”

Zheng Yihang smiled slightly, "Don't be nervous, don't be nervous, this is a small puzzle game that brings teachers and students closer, if you can't, it doesn't matter, you sit down." ”

"Lin Hai, what about you?"

Lin Hai stood up, "Teacher, give me some time, I already have an idea, I believe I can come up with it soon." ”

"It's okay, you sit down first."

"Lin Hai, what about you?"

Zheng Yihang called the next student, who was the best student in the previous two questions, and wanted to see their thinking and logic ability.

Lin Hai stood up, "Teacher...... Is it three times? ”

Zheng Yihang's eyes lit up slightly, and then said, "Go on, how did you get it three times?" ”

"I'm just doing the math, but I haven't solved the problem yet."

"I see, you sit down first."

Zheng Yihang also asked Lin Hai to sit down, Lin Hai is a good classmate, but he still lacks some talent in some aspects.

Then, Zheng Yihang called Fu Shaohua and Guo Xiling successively to answer.

It's a pity that neither of them has the right way of thinking, this question seems simple, but if you really look at it, this puzzle question will not be simple either.

Then, Zheng Yihang's gaze fell on Fang Chao's body, "Fang Chao." ”

"Teacher Zheng."

"What do you say? Do you have an answer? ”

"Three times."

Fang Chao replied with the same answer as Lin Hai.

Lin Hai looked at Fang Chao, I just said this answer, why are you saying it now?

Zheng Yihang opened his mouth and said, "Come, tell me what you think." ”

Fang Chao didn't go to see Lin Hai, although Lin Hai had the right answer, but he didn't have the right way to solve the problem, then he could only get a comfort score, and it was impossible to get a full score.

Suppose the person wearing the black hat is A, B, and C, and thinking from A's point of view, A sees B and C wearing a black hat, and A thinks that when B sees C wearing a black hat when he turns off the light for the first time, he has satisfied that "there is at least one black hat", so B can't be sure whether he has a black hat and can't clap his hands, and if only C wears a black hat, C will clap his hands when he turns off the light for the first time. But C didn't clap when he turned off the lights the first time, which means that C was also waiting for others to clap, and B knew that he was also wearing a black hat, and B and C would clap when they turned off the lights the second time. But when he turned off the lights the second time, he didn't clap his hands, which means that B and C also saw 2 black hats each, and A deduced that he had brought a black hat. The same is true for B and C logical reasoning, and the other people in white hats are reasoning like this, waiting for A, B, and C to clap when they turn off the lights for the third time, so there are only three people who will clap their hands when they turn off the lights for the third time, so that's the answer. ”

"The big guy is so powerful!"

"I don't understand it, but I feel right!"

"It's amazing, is this the world of the strong? Who is he? How can it be so powerful...... There is such a big guy in our class. ”

"If you look at it this way, he actually looks pretty good, I feel a little excited, two top students together, my mother will definitely not object, right?"

Zheng Yihang said with a smile, "What you said is just assuming three people, so what if five people wear black hats?" ”

"Teacher Zheng, if there are five people wearing black hats, this question is wrong, from the beginning of the third time someone hit themselves has already told us the answer, so the first few times to turn off the light there is a slap sound, which means how many people wear black hats, but there are a total of 52 people in our class, if you really want to turn off the lights slowly, I think it's boring...... Actually, I think it should be like this, if there is only one black hat, the first time the person wearing the black hat sees everyone wearing white, they will immediately burst into applause. So for the first time, people were known to have at least two or more black hats, and at least one black hat was seen. The second time, there was still no applause. If there are only two black hats, then these two people should definitely burst into applause when the lights are turned on this time, indicating that at least three black hats exist, and so on......"

"Wow, what a big guy!"

"Which school graduated from this great god? That's a little too tough, isn't it? I was stunned, but I felt like he was right......"

"Is math so interesting? He seems to be called Fang Chao, right? ”

"How do I feel like I've heard this name somewhere?"

"Popular names, what's so unusual, just like Wei, Chen Wei, Lin Wei, Wang Wei, and so on, this is a big deal, it's not nothing, Chen Chao, Yang Chao, Lin Chao are not all, a Fang Chao, I'm sure you've heard it somewhere."

"No, it's a famous person, I'm sure I've heard of it......"

And at this time, Yang Ning, Pan Mingming, Lin Hai and the others seemed to have thought of something, and looked at Fang Chao with an incredulous expression, they had some guesses about Fang Chao's identity, but they didn't dare to confirm it.

At this time, Zheng Yihang looked at Fang Chao and said, "I have always known that our class has the winner of the CMO provincial and regional full score championship, and when I saw it today, it was really extraordinary." ”

"What? CMO Preliminary Champion Winner? ”

"Damn, this thing is very golden......"

"I thought I was strong enough, I didn't expect that there were more strong players in the strong, this thing, no one has ever received a full score in the past few decades, that is, this year, there is a CMO provincial champion with a full score, but I don't know his name, I only know that he should also enter the city No. 1 Middle School, I thought he would be arranged to the first or second class, but I didn't expect to come to our seventh class, and there is pressure now."

"In vain, I used to be the first in math in the class, but I can't pretend to be forced in this class anymore, and the days when I can't pretend to be forced are boring......"

"Why, why, both Shengyu and He Shengliang!"

“……”

At this time, many people looked at Fang Chao with completely different eyes.

Fang Chao looked shy, "Don't look at me like that, everyone, I'm just the champion of the preliminary round...... I don't want to, my goal is to win the IMO International Individual Gold Medal this year. ”

", force the king!"

"This is the real forcing king, compared to him, what are the forced people I used to pretend?"