I really don't want to lie down and win

"Oh."

A few minutes later,

Teacher Teng finished his work, looked up at Xu Mang, and suddenly smiled and said, "Xu Mang...I didn't expect you to hide it so deeply. The topic is okay. I've already read it. It's a little deep and interesting!"

"Of course!"

"Genius!" Xu Mang said proudly, "I'm not bragging about Mr. Teng. I write all the math papers for our school's final exam. Guess what the school's score is?"

"..."

Teacher Teng glanced at Xu Mang. Based on the questions he asked this morning, it's probably...difficult, right?

"Seventy?"

"Ms. Teng... Am I the one who made the students fail?" Xu Mang said seriously, "I am such a ruthless and shameless person? Everyone is going to celebrate the New Year, and I can't do this because of emotion and reason." !"

Teacher Teng was stunned for a moment. Is he such a person who values ​​love and righteousness?

"That..."

"Nine minutes past 29." Xu Mang said with a smile.

"..."

really!

You are such a person!

Teacher Teng smiled bitterly and said, "Xu Mang, since you are so good at writing questions, do you have any ideas? For the next provincial-level Mathematical Olympiad, you will be the deputy leader of the questioning team and be responsible for the review and direction of the questions."

Xu Mang was stunned for a moment, and asked curiously, "Then I will study in the Department of Mathematics, Jiangda Institute of Technology?"

"Alright!" Teacher Teng nodded.

"not good!"

"But it's okay to ask questions." Xu Mang smiled and said, "I'll join!"

"Then it's settled, I have your contact information." Teacher Teng took a serious look at Xu Mang: "Xu Mang...Are you really not coming to our mathematics department?"

"Ah."

Hearing the answer again, Teacher Teng was still very sad, but... I had my heart towards the bright moon, but the bright moon shines on the ditch.

...

Time passed minute by minute,

Xu Mang and Yang Xiaoman's days at Jiang University are coming to an end, and they will return to Ning City the day after tomorrow.

this afternoon,

Xu Mang came to the classroom of the provincial Olympic team. He was going to give Jin Leilei the last lesson, and of course Yang Xiaoman followed.

"Brother Xu Mang..."

"Announce the answer!" Jin Leilei said in pain, "We feel like we are going to die."

"Yes...Brother Xu Mang."

"Announce the answer!"

The cry for help came like a tide.

Ge Jun Descendants 2.0 completed!

Get upgrade card 10

Xu Mang saw the system prompt that the task had been completed, and it was almost time to announce the answer.

"What do you want to know?" Xu Mang asked.

"Did the tourist's words bring any results?" Jin Leilei said, "We want to know this."

"Have!"

Xu Mang nodded and said solemnly.

at this time,

The only female contestant in the team raised her hand and said, "Brother Xu Mang, didn't the islanders already know the existence of people with green heads before the tourists came? Not only did they know that there were people with green heads, but they also knew that there were 99 people with green heads. People, what will be the result if you can have tourists?"

"It's simple."

"I know you are a green head, I know that Jin Leilei is a green head, I know that Yu Yu is a green head... I always know that No.90 is a green head, but I don't know that I am a green head." Xu Mang said: " Then by analogy, if the tourists say it, let everyone know that there are people with green heads on the island."

The five people below looked confused.

"Maybe it's hard for you to understand now, there's nothing to do with it!" Xu Mang continued, "The simplest situation is this... If there is only one person on the island with a green head, then the result of the tourists' words is that he I didn’t see other people with green heads, so I jumped into the sea the next day.”

"if..."

"There are two people with green heads on the island, Jin Leilei and me." Xu Mang pointed to himself and Jin Leilei: "At this time, the tourists' words will not bring results, because both Jin Leilei and I can see that the other party is green. I have a green head, but I don't know if Jin Leilei knows that I have a green head, and neither does Jin Leilei."

"But the tourist spoke...his speaking action brought different results, because I know, and Jin Leilei also knows, there are people with green heads on the island, what kind of results will this bring?"

"I'll wait a day to see if Jin Leilei will jump into the sea. If he doesn't jump into the sea, it means that Jin Leilei has also seen the person with the green head." Xu Mang paused and continued: "I know that there are only me and me on the island." Jin Leilei, no one else has a green head, the only person Jin Leilei sees with a green head is me."

"Understood?" Xu Mang smiled.

Got it!

It seems to have touched the threshold!

After Xu Mang's explanation, the five members of the provincial Olympic team suddenly realized, but it's a pity... It's a little bit close.

"What if there are three people with green heads on the island? For example, me, Xiao Yu, and Jin Leilei." Xu Mang said, "It's all the same. At this time, tourists' words will not bring results, because all three people know that there are green heads. I see that Yu Yu and Jin Leilei can see each other's eyes, but I don't know if I have a green head."

"Because if I'm not a green-headed person, only Yu Yu and Jin Leilei are green-headed people. Yu doesn't know if Jin Leilei knows that there are people with green heads on the island." Xu Mang coughed lightly and moistened his throat: "At this time This action of the tourists speaking will give me a result. I will wait for two days to see if Yu and Jin Leilei will jump into the sea. On the third day... the three of us will jump into the sea together."

"According to this logical thinking, we can continue to deduce until the Nth green-headed man."

Clear!

See the other side!

Jin Leilei and the others followed the train of thought provided by Xu Mang, and they roughly understood it.