Chapter 73 Three Graves 36 News

"Discrete mathematics is the structure of discrete quantity and its relationship with each other. Discrete mathematics can also be said to be the basic core discipline of computer science. Discrete mathematics is at the same time as a bridge built between mathematics and computer science."

These two sentences are the explanations of "Discrete Mathematics" just found in "Discrete Mathematics" just found, and then interrupted by the dynasty.

"I'm familiar with discrete mathematics, why do you still want to Baidu, look down on me!"

"Then Wang Xiansen, why did Jin Xiaoan look at the" Discrete Mathematics "on the eyes of the eyeliner when Fu Hao mentioned‘ Jiangliu ’?”

"How do you know that she can see" Discrete Mathematics "! It may also be the next" Everything Starts with Encounter "?" The dynasty asked.

"Because of our dormitory of Wang Shishi, the same one belongs to Xu Hao's" Discrete Mathematics "..."

"God Horse?" The dynasty was excited, "Unbelievable!"

"Talk well!" Xing Conglian patted the boy's head.

"Damn," Discrete Mathematics "is not a high -level mathematics. It does not belong to the essential courses of university. They are not mathematics or computer system. Why are you suddenly interested in this?"

Listening to the dynasty chattering in his ears, Lin Chen bowed his head and looked at Professor Fu who was embarrassing and sophisticated on the screen and Jin Xiaonan. What they said in the conference room probably all passed the microphone and fell into Fu Hao's ears. The muscles are stiff, as if do n’t know how to do it.

"Professor Fu ... Guess, will Jin Xiaoan's" Discrete Mathematics "write the name of Jiang Liu?" He said to the microphone, and then clearly saw that in the picture, Fu Hao, Fu Hao, Obviously because of his words, it was shaking.

However, the way to verify the guess only has to do it.

This time, he didn't pay Hao Hao anymore, but said, "Isn't your armpits holding a stall bag, holding a cigarette case with another hand, pretending to see the book" Everything Starts from Meeting ", and then pretend not to be Be careful, pull out the discrete mathematics. "Fu Hao probably faced the girl, and could only use the ability to speak at a zero percent of the usual, so he continued to tell," You can say to Jin Xiaoan: ' You also read everything, I have read this reasoning novel. '"

In short, the level of the director is not high. Fortunately, Fu Hao was embarrassed from beginning to end, so whether it was his introduction or the next action of the book frame, it was not abrupt.

Several books fell to the ground. Fu Hao hurriedly squatted down and blocked Jin Xiaoan's sight. He first put a reasoning readmade back to the table, and said in his mouth, "This book is really good, have you finished reading it? "

Then pretended to be inadvertent, he quickly turned the "Discrete Mathematics", and the other hand did not forget to hold the cigarette case. He will take a look at the whole book.

"Is this discrete mathematics like Wang Shishi?" The Dynasty slowed down the picture manually, dragged the progress strip, and then asked.

"Same." Lin Chen stretched out his fingers and drew a circle gently on the screen.

In the lower right corner of the title page of the book, the name "Jiangliu" really appeared.

"Pay attention to taking the copyright information page, and then you can retreat." Lin Chen finished speaking and closed the microphone.

The conference room was quiet, Lin Chen did not speak, and the punishment did not speak. Even Captain Jiang, who was usually careless, did not dare to speak.

Therefore, in this case, the only dare to speak is the dynasty.

"Is this a sister meeting, and we still need to send books to urge each other?"

The voice of the teenager is light and sweet. Although this problem does not have much effect, it will be inexplicable to listen to the voice of the dynasty.

"Can you explain a bit of discrete mathematics?" Lin Chen asked.

"I can't explain it to you, the discipline is too big, the content is too much, it is too difficult for you." Although the intention of this sentence is to say "your mortal IQ is too low", but the dynasty is sincere People have no strength to knock on his head.

When they spoke, Xing Conglian followed Fu Hao to read the original discrete mathematics, and suddenly said: "It's a bit strange."

"how?"

"You see, this book is a bit old, but there is no mark on it ..." Xing Conglian pointed at the corner of the curled book and said, "Xu Haozhen gave Wang Shishi, the same is true, although it was turned over Many times, but there is no obvious reading notes in the book. "

"What's wrong with no notes, a normal person can't stand reading 10 pages of this kind of book?" Dynasty interface said.

"Then ask Wang Xiansen, why do you turn a book that normal people can't stand reading 10 pages to rotten?" Xing Conglian hooked Wang Xiansen's neck and asked with a smile.

At that moment, the young comrade of the dynasty had an epiphany, three flowers gathered, turned his head and said to Lin Chen, "Achen, what about the boss asking you!"

Lin Chen was amused by him, and the original foggy situation suddenly became clear: "The book has been turned over, it can only prove that someone has turned it over many times, but it can't prove anything else."

"Can't prove anything?"

"I can't prove it, whether it's Jin Xiaoan or Wang Shishi, they have read this book seriously..." Lin Chen glanced at Xing Conglian, and added, "For professional books like this, most people who read them seriously will know how to read them. Take notes in the book while reading..."

"But it's also possible that this book is so precious to them that they are reluctant to paint!"

Seeing that the Dynasty would draw inferences from one case, Lin Chen nodded with relief, and said, "That's true, so now there are two possibilities. First, they haven't read the book "Discrete Mathematics" seriously, they just read the book. Turning over and over again, then what this subject is about actually means nothing to them. Second, they have studied "Discrete Mathematics" seriously just because they cherish this book too much and have not made any notes on it... ...Which one do you think is more likely?"

Wang Chao scratched his head: "I don't know! But to be honest, I'm not a math or computer major. Learning "Discrete Mathematics" is too difficult, and the founders of set theory are crazy..."

"So you agree with point one?" Lin Chen interrupted the boy's words.

"A Chenfan, I think you're right!" Chao Dynasty said to him very spinelessly, "So the answer really is that they don't understand shit, are they flipping through the book?"

"yes."

"But how do you know?"

"Oh, because you just showed me Jin Xiaoan's file, which contains her university transcript. She failed the high school math." Lin Chen said.

Hearing this, Comrade Wang Chao quickly took a deep breath, and then said to him very sadly: "Achen, don't learn from the boss, it's not good..."

"Conscientiousness is very important in the process of handling a case." Xing Cong even knocked on the dynasty, educating him, "and having studied discrete mathematics is nothing to show off."

"But why, what kind of qigong are they practicing? Flip through the book and change the meaning of it?" Wang Chao asked depressedly.

"If you add several other keywords in this case, such as 'dark web' and 'drugs', do you have any associations with this?" Xing Conglian continued to ask.

In an instant, Wang Chao's eyes changed: "Damn, boss, I'm going to be terrified, what are you thinking about tonight!"

As soon as the boy said this, the whole room fell into an unbearable silence.

Lin Chen clenched his right hand tightly and fell into silence as well.

A rotten book, a group of college students, a controlled group, a dark webcast, a drug deal, a jewelry heist...

If these keywords are connected in series, it is roughly like this: Some people have controlled a group of college students through some means, not only using them to conduct various online live broadcasts to make huge profits, but also may even involve hundreds of millions of yuan in jewelry robbery and transnational The drug case, and the only clue they have now is that each of these students seems to have a strange "Discrete Mathematics" in their hands.

Then, the role of this book seems to be obvious.

"What the hell is going on, I found that you don't like to explain the vernacular." Jiang Chao finally couldn't help breaking the silence that was too tacit.

"Let's put it this way, why did the murderer behind the scenes use the dark network to broadcast live?" Chao asked back.

"In order not to be found out!"

"Yes, whether it is an onion server or a dark network, it is essentially a service to protect personal privacy. In other words, it is an encryption method, so if someone controls a large group of students, does he need to give these children a subscription? Order, then, he must also ensure that the information he transmits has a certain degree of security, right??"

"Isn't it, do you think that book is a codebook, what age is it now, you still play with this kind of thing, and this book has not been found in the relics of other deceased people?" Jiang Chao responded quickly and continued: "And don't they have a dark network, so on the Internet, isn't it more convenient to have a dark forum or something to communicate?"

"Oh, it's very simple. Don't the organization recycle this important thing before it dies? Is the criminal organization stupid? Can you keep such an obvious clue for you to check? It is estimated that Wang Shishi's book must be due to some special reasons, so there is no Destroyed! In fact, although this encryption method is very simple, it is actually quite useful and hidden. First of all, even roommates, very few people will read books such as "Discrete Mathematics". It's easy to be suspicious. Then, it's easier to be traced by group texting, WeChat or something, and math books have many formulas and strange characters. For example, if I report a number 1612, Do you know if I'm talking about 16 pages and 12 lines, or 1 page and 6 lines and 12 words, if that word happens to be a minus sign, you know that means backspace, carry or delete? Of course, in theory, this encryption method is It can be cracked, but it requires a lot of data and operational analysis. Therefore, a math book can really be used as an ideal password manual... The reason why I think it is ideal is because, except for my boss, who else Mom will link a good book to the underground cryptographic work!"

"I'm boasting me." Crown Cong Cong said coldly.

Finally, the team leader who had been hiding in the corner suddenly became interested in this topic. But rather than interested, it is better to say that this is the question he is most concerned about: "You mean, they use this" Discrete Mathematics "as the encryption manual to convey the information? I think you can think of this. I am afraid that this kind of encryption method is an underground criminal organization and accurate. It is a method of using drug dealers very much. Then I can doubt that these students are actually used secretly to deliver drugs? "

"You can doubt this, but this doubt is basically useless now." Xing Conglian said very coldly.

"You can't stop me from investigating because of your own case!"

"I seem to say that everything related to Fang Zhiming's drug factory case is not in the general direction we detect?"

"This is a major clue, we can go down!" Ren leisurely pulled the volume.

"Oh, did the team leader intercept any password?" Xing Conglian was still not salty, but in a word, he couldn't speak Ren Xian.

"No, but I can review the file, maybe there will be clues ..."

"Okay, if you are lucky to intercept a string of passwords, and then your conclusion is verified. Yes, someone controls a group of students to conduct countless illegal crimes, including using their drug trafficking, and then you can catch the murderer behind the scenes or save Are these children? "The prisoner was very cold. He reached out and pointed at the notebook computer of the dynasty. The picture was fixed on the little girl in the seat. Is there any difference between the murder? "

"I ..." Ren Xianxi stopped, obviously he didn't want to understand the problem.

"What's the difference?" Jiang Chao also inserted.

Lin Chen looked at the captain of the criminal policeman who was obviously popular by the two, and couldn't help patting his back and explained for him: "The difference is that the ordinary murder case, as long as we find the murderer, just find the murderer, but in this case, in this case, in this case, in this case, in this case, It is not the first important thing to find the black hands behind the scenes. "

"Isn't it important to catch the black hands behind the scenes?"

"Compared with the imminent bleeding incident and a group of controlled college students, who is behind the scenes, and what he uses these students to do, these problems are not important, how to solve the current problems is the most important."

After Lin Chen finished speaking, he looked at Xun Conglian again.

In fact, if it wasn't for the explanation of the sentence, he would not find that the idea of ​​the original punishment has always been very clear, and he was prioritized.

It was so correct that he had nothing to say.

"Then find the murderer and let him stop acting. Isn't this the fastest solution?" Jiang Chao asked again.

"We now have two available clues, one book and one person. Suppose the discrete mathematics is really a password list, but now we do not even intercept the corresponding password. Xiao An ... You didn't pry open Cheng Weiwei's mouth that day, so you see Jin Xiao'an today, and feel that he can pry open her mouth and get any useful information? "Lin Chen continued.

"Then we still do not die now?" The dynasty raised his hand grudge and asked.

“谁说的？”刑从连拎了拎王朝的耳朵，说，“首先比对王诗诗那本离散数学和江柳是不是确定为同一版本的，然后查版权页找出版社看看印量和During the library record, how many books have flowed to Hongjing, do you want me to teach you this kind of thing? "

"This kind of small thing is on me ..." The dynasty patted his chest, and his hands were flying. "First look at the version!" He said, enlarged the previous copyright page picture, and then said: "Congratulations to this gentleman, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book, this book It is the first version printed in 2001. The printing amount is 5000, that is, it is really antiques! "

"The advantage of the old version of the book is that it may not be sold online again ..." The teenager knocked on the car and sighed: "Bingo, I really haven't sold it online. I don’t know how to evaluate you. luck."

"So, is lucky or bad?" Crimine Cong Cong asked boringly.

"I haven't sold it online, it means that it has taken the pipeline of the publishing house. I have ordered this book, and any system can only find first -level dealers.

The teenager raised his tail sound.

Although a lot of assumptions have been made, after he sets up the search conditions, after the search, the entire Yongchuan City has only appeared the name of a dealer.

[Changwei, Yongchuan Siyuan Inspirational Book Distribution Co., Ltd.

At this moment, Jiang Chao also handed the mobile phone pictures from the dynasty.

The teenager glanced at the photo, quickly copied the address of the bookstore, and sent it to his boss: "The two books are the same version, the address is sent to your phone, the boss can start, Bye bye!"

Time is 8:31 pm.

Lin Chen first looked at the time to show his sentence from the mobile phone, and then looked at the address. He found that the location of the dealer was just in the book market in Yongchuan University, so he said: "Phoenix Book City generally at nightIt will be closed at nine o'clock, and it should be able to catch up with a little bit faster. "

Xing Conglian had turned around and prepared to go out. After hearing his words, he suddenly turned and said, "We are nine o'clock, so the time difference between the other side of the ocean is about to get up.If you have anything, you order this kid to do it. "He finished speaking, pointing at the head of the dynasty, as if not at ease, and instructed," Don't do any exchanges with those people, they provide useful information, they provide useful information, they provide useful information, they provide useful information, they provide useful information, they provide useful information, they provide useful information.We give money, so the fastest. "