My Identity As A Schoolmaster Has Been Exposed

Chapter 217 VIP Service (two more)

“It can be noted that rn(k) represents the remainder of n divided by k, then rn(k)=k{n/k}.”

“Let f(n)=rn(1)+rn(2)++rn(n)+o(1)+o(2)++o(n), then…”

….

“We discuss the value of k({(n+1)/k}-{n/k}), in fact…”

“Finally, you can get f(n+1)-F(n)=2n+1.”

“Then it is easy to get f(2)=4, and then f(n)=n2.”

Xu Cong spoke at the speed of the topic, just like this car. He got on the high speed and galloped. There was no intention to stop in the middle. This was a direct flight to the destination.

Zhu Tiesen was highly concentrated at this time, and he was barely able to keep up with his thinking. As for the details, he completely gave up.

When Xu Cong’s voice stopped abruptly, Lao Zhu’s shock, from head to toe, from skin to heart, the cells of the whole body trembled.

Seeing this question, he was silent for a while, and his thoughts flew off all of a sudden.

Over the years, he has seen too many mathematics geniuses at Peking University.

A few years old participated in the Olympiad and was invited to participate and won the first place!

Junior high school was awarded multiple first prizes in national and provincial mathematics competitions, and also a league champion, entered the provincial team, and entered the national training team, etc.

At Peking University, such a classmate is considered a rare existence, but when compared with Xu Cong, it looks very bleak!

Zhu Tiesen looked at Xu Cong solemnly, and asked very seriously: “Student Xu Cong, can I ask you a question?”

“Have you really never participated in any competition from elementary school to junior high school to high school?”

“I heard that your previous grades were very unsatisfactory. Did you hide it on purpose?”

Xu Cong heard him talk about his past history, smiled, and said to her: “Professor Zhu, you have a lot of questions. Everyone has to have reservations, right?”

“Everyone has their own territory, and no one wants to be disturbed, so don’t break the casserole and ask the end!”

When Zhu Tiesen heard this, he was still a little reconciled. He opened and closed his mouth several times, and sighed.

He didn’t ask any more questions. Instead, he took out his pen and wrote and painted on the performance paper. He was analyzing Xu Cong’s two solutions.

Xu Cong played with his cell phone for a while, and when he was exhausted, he began to sleep. Zhu Tiesen turned the cell phone to silent.

Then he sent a message in a WeChat discussion group with only a few professors and shared the matter with them.

“Old folks, Xu Cong gave me two different solutions to this problem…”

This is not the discussion group of Peking University, but the paper-making group of the National Olympiad. The top mathematics professors from the famous universities across the country.

Some of them have contributed to the domestic mathematics circle, so this group can be said to be a very rare group chat in the academic circle.

“I know, this question is nothing to you.”

“However, after reading the topic, he quickly gave two ideas and told me through dictation.”

As soon as these words came out, these professors deleted all the words they were typing, and began to reorganize the language.

When a professor saw the message he sent, he didn’t hesitate to reply with a message: “I think there is no need for review or something.”

“+1”

“1.”

The discussion group of several people is very clean. If you have something to say, agree is “1”, and disagree is 2.

Simple! Direct! Effective!

“Lao Zhu, when can I arrive?”

This time the paper group was still at Peking University, where food and lodging were all required. At this time, after hearing about Xu Cong’s impressive record again, they couldn’t wait.

Zhu Tiesen looked at the news on the screen, smiled, and then persuaded them: “When I go back, it is already very late! Don’t wait, you guys, let’s talk about it tomorrow morning!”

After that, there will be no news in the group, everyone is very busy, and it is impossible to spend too much time to chat.

Zhu Tiesen put down his phone, looked at the driver, and whispered to him: “Your phone is also quieter! Don’t make any calls suddenly, it will noisy Xu Cong.

“Okay, Professor Zhu.” The driver was cautious.

Even Zhu Tiesen takes care of people like this, he treats them better. It can be said that he has never driven such a stable car in his entire life!

He clenched the steering wheel with two hands. He hadn’t held it with two hands for many years, because he was an old driver.

“hiss!”

He was very serious, staring at the front, preventing the car from trembling a little because of bumps and bumps. When he arrived at the service area, he was also busy with his horse.

He even paid out of his pocket to buy food and drink for Xu Cong and Zhu Tiesen.

Zhu Tiesen: “Thank you!”

Xu Cong: “Thank you.”

The driver smiled and said to them: “You two are polite! This is what I should do!”

“Mr. Xu, did you sleep comfortably in the car before? I bought a pillow in the store next to you. You should be more comfortable when you sleep next time.”

“Professor Zhu, you too!”

This treatment!

Super VIP!

Xu Cong gave a thumbs up to the driver, this guy, the service is so attentive.

After dinner, Xu Cong called home and talked to them about the daily routine: “Dad, how is the house?”

Xu Junshan was also very happy at this time and said to him: “The house was built beyond my expectations! There are more people coming! So it’s very fast!”

“Oh, yes! To tell you something, it is their house next door…”

Xu Cong knew what he wanted to say when he heard it, so he said to him, “Dad, my mother told me.”

Xu Junshan laughed a few times, and said loudly: “After I said it, I want to say it too! It’s so cool! Ahahaha!”

“I’ll tell you that he dare not go home directly every day, not only he dare not go home, but also follow the construction team-get back to the company, and then drive back!”

“This time, he still drove by himself!”

Xu Cong listened to his words here, and this scene came to mind directly, he couldn’t help being a little speechless: “Uh…”

“Dad, you put down your troubles first! I’ll tell you something! I’m going to the capital again, and now I’m in the service area on the highway.”

Xu Junshan asked directly: “What competition did you participate in? Or…”

Xu Cong told him the story: “National Olympiad, tell you, let you know, don’t worry.”

“But this time it was closed, and it looked like more than ten days. If I can’t be contacted during the period, my cell phone signal is blocked.”

Also blocked the phone…? ?

Xu Junshan became excited at once, and hurriedly asked caringly: “Damn! Son, you won’t be deceived?! You this…”

Xu Cong naturally understood his reaction, it was normal, so he calmly said to him: “Dad, don’t get excited, don’t worry! The location is still at Peking University! There is a professor with me!”

When Xu Junshan heard that there was a professor from Peking University, he couldn’t help but think of the few people Xu Cong mentioned during dinner the other day, so he blurted out: “Are you one of your old fans again?”

“Forehead…”

Xu Cong was a little ashamed and said, “Dad, your analogy, isn’t it a bit too much!”

Xu Junshan also asked seriously, “Isn’t it?”

“Um… you say yes, even if it is!”

Xu Cong didn’t explain much, anyway, he expressed what he wanted to express, so he ended the call: “I’ll hang up first! Dad!”

Xu Junshan also knew his whereabouts, and understood that he was doing business, not after being fooled. He also said with confidence: “Okay! Bye!”