When Wang Hao returned to the office of the comprehensive building, he felt that the atmosphere was a little strange.

The others were slightly better, just looking this way, saying hello normally or something, but their eyes were a little strange.

Zhu Ping is 'unable to hold back' words, and when she has something to say, it can be clearly seen, for example, she took the initiative to help Wang Hao make coffee, showing a friendly and good colleague.

Wang Hao was busy saying 'thanks' several times.

Then Zhu Ping moved a stool and sat next to her, saying that there were some research problems, and when she saw people coming and going at the door, she just sat there, hesitating and not speaking.

When Wang Hao asked, he obviously looked at him left and right.

If it weren't for some understanding of Zhu Ping's character, Wang Hao would have thought that this eldest sister was preparing to plot against him.

Fortunately, not long after, the head of the department called Zhu Ping away.

Wang Hao exhaled lightly.

After Zhu Ping left, the office became lively, and in the office next to her, a female teacher surnamed Deng came to 'visit the door', talked about the students' exams, and complained that there were more than 50 points in the class.

"What should I do? If you take a 58 or 59 exam, you can raise two points, and you will pass with 60. ”

"As a result, several students scored 53 or 4 points."

When this topic was spoken, it immediately caused a lot of complaints.

Yan Jing also said, "My class is the same, many students don't learn at all, I have already drawn the key points, and the questions in the exam are examined, but there are still many students who make mistakes, and there is even a student who read the cheat sheet during the exam and was caught with zero points." ”

Teacher Deng immediately said, "The one who read the cheat sheet and was deducted with zero points, I know, it was Meng Lili from the laboratory building who invigilated the exam, Meng Lili is very young, less than thirty, she is really angry." ”

"Just look at the cheat sheet, at least steal it, right? The student was still watching directly on the table, and Teacher Meng passed by, but the people didn't pay attention to it at all, so they continued to watch. ”

"It's been several years, and it's the first time I've seen such an arrogant student, and it's probably because I see Teacher Meng young."

"Balabala~~~"

Mr. Deng is obviously very gossipy, and his degree is no worse than Zhu Ping, and he explained the truth of the matter clearly in the process of complaining.

Seeing the others discussing things together, she stopped talking with satisfaction, turned her head to look at Wang Hao, and asked casually, "Teacher Wang Hao, how is your class?" You've only been teaching for three months, right? Is this a verdict? ”

Wang Hao pointed to the test paper on the table and said with a headache, "There is still half of it." ”

Teacher Deng walked over and flipped through it, and immediately said in surprise, "You can teach these classes, and you can do all the big questions." ”

Wang Hao explained, "I told them that the big questions are the usual homework questions, and the question types are the same, so they will change to a number, as long as they are reviewed, they should be able to do it." ”

"That's not it!"

Luo Dayong immediately denied it, "My "Theory of Probability", a total of ten questions were given to them before the exam, and it was clearly stated that the three major questions in the test paper were in it, and the three major questions accounted for sixty points, and the result was ......."

He said and shook his head, "Half of the papers." After speaking, he added, "It is estimated that it has something to do with the strict invigilation." ”

Wang Hao listened to Luo Dayong's statement, flipped through the dozens of test papers he had just judged, and basically got all the questions right, and immediately nodded with satisfaction, "Perhaps, the students in the classes I teach love to learn more." ”

This sentence has caused a new round of topics.

Teacher Deng immediately pointed out, "Teacher Wang Hao is strict, I heard that those students are afraid of you, you should be strict now, students, don't study, a lot of exams don't study, all rely on cheat sheets, can you do it?" ”

"Balabala~~~"

There was a teacher who kept saying next to him, which made Wang Hao feel very good, and listened to the book reviews while judging the students......

Very good!

More than 300 test papers were passed in turn, and it was not an easy job to record the students' scores and enter them into the computer.

Wang Hao was busy for more than two hours.

Teacher Deng has already left, and the others are busy with the things at hand, and they are ready to leave after seeing the time.

Zhang Zhiqiang stood up first, walked outside to the door, patted Wang Hao's shoulder, and whispered, "Congratulations, I heard about that." Rest assured, no one else knows. ”

Luo Dayong followed behind and gave Wang Hao a thumbs up, "Acta Mathematica Sinica, this time it's really good!" ”

Yan Jing was the last to stand up, she moved to Wang Hao's side, and asked, "Are you done?" ”

"It's not close."

"Hmm...... It's just ......" she hesitated, but still said, "Your paper, that matter, when it is published, will be celebrated for you." ”

“…… Uh, good. ”

Wang Hao didn't know what to say, he finally knew why when he entered the office, the expressions of the others were weird.

At this time, Zhu Ping came back from outside, looked at Wang Hao, and then looked at Yan Jing, stood at the door for a long time, and still said, "Wang Hao, your paper...... Anyway, Yan Jing is no one else, so I'm ......"

Wang Hao rolled his eyes vigorously, and said with a smile, "Sister Zhu, don't hold it back, it doesn't matter who it is." This is something that everyone in our office knows about except you. ”

“——？”

Zhu Ping almost wrote the word 'confused' on her face, she pondered for a long time, but she still didn't understand the logic.

Yan Jing couldn't help but laugh with a 'poof'.

……

The publication of the paper in Acta Mathematica Sinica is only circulated among the school faculty and staff, because it is not really published, and others only know the news, and it will not have any impact.

The final marking work is over, and the time has entered the holiday.

University teachers also spend their summer vacations with students.

Some young faculty members who are under pressure to do scientific research still come to school and go to the laboratory often, but because they don't need to do teaching work, it naturally becomes much easier.

Wang Hao was not relaxed, he was about to go to STACS, and when he submitted the visa for the application, he still had to prepare various materials, find the school to issue a report, and so on.

Don't worry about airfares and hotels.

Chen Qinghua, the dean of the School of Computer Science, came over, talked about participating in the STACS meeting, helped him introduce a scholar who participated in the conference together, and after contacting, he agreed to depart from the capital together, and the other party directly booked air tickets and hotels.

Two days before the meeting, Wang Hao took a plane to the capital and met people in the airport hall.

Ruan Hailong, 36, a professor at the School of Information Engineering at Xijing Jiaotong University, is on the thin side, wearing jeans, a gray shirt, and slightly curly hair that looks a little messy.

Wang Hao saw Ruan Hailong's photo, recognized it at a glance, waved his hand and shouted, "Professor Ruan, here!" ”

Ruan Hailong dragged the suitcase and walked over to look Wang Hao up and down, his expression was a little surprised, "I saw your photo, and I thought it was taken a few years ago, but I didn't expect it to be so young!" ”

Wang Hao smiled, "You are also very young. ”

"It's not comparable!" Ruan Hailong shook his head with a wry smile, he was thirty-six years old, and he could be called a 'young scholar' wherever he went, but when he walked with Wang Hao, he could only say 'old'.

The two went together to get their tickets, checked their luggage, and then busily entered the international flight channel.

When I got to the small restaurant and sat down, I had time to chat quietly, Ruan Hailong talked about the news some time ago, and talked about Wang Hao's ten papers.

Then the topic shifted to something new, "I heard Professor Chen say, you're going to make a presentation, right?" What's the content? ”

Wang Hao nodded and said, "Large number multiplication algorithm." ”

Ruan Hailong was surprised for a moment, and immediately reacted, "Is it to improve, or to use a new calculation method?" ”

The former is a small increase in the computational speed, while the latter may lead to a qualitative leap in the algorithm.

The results of the two are not at the same level.

Wang Hao thought for a while and explained, "It should be improvement and innovation." I still use the Fourier transform to assist in the calculations, but there are some innovative calculations in the algorithm. ”

Ruan Hailong nodded when he listened, and the two had a meal on the topic, and then went to the waiting hall at about the same time.

Check in and get on the plane.

When he sat in the seat of the plane, Wang Hao exhaled lightly, but the long-distance journey had only just begun.

Ruan Hailong sat next to him, and suddenly opened a new topic and asked, "I heard Professor Chen say that your paper on the Monge-Ampère equation has been reviewed by Acta Mathematica Sinica and confirmed to be published?" ”

“……”

Wang Hao's expression suddenly froze, and he couldn't help but think of two people in his mind, one was named Li Ming and the other was Zhu Jianrong.

But they said, 'Never get it out.'"

As a result, not only the faculty and staff of this school, but also the professors of Xijing Jiaotong University, who are thousands of miles away, know about it?

……

The long-distance flight is to hope to sleep and rest, but it is impossible to sleep all the time, but fortunately, there is a Professor Ruan with him, not only can take care of each other, but also find a topic to talk about.

Hailong Ruan is a very good Ph.D. in informatics and has participated in several major projects.

He recounted one of the experiences, "I went to a supercomputing center. The computer in the supercomputing center is very powerful, and my colleagues and I have compiled a code to crack the Rubik's Cube, as long as the state of the Rubik's Cube is entered, in the blink of an eye, we can know how to restore it to the original state. ”

"The fastest way?"

"Not generally."

"The code we designed was very simple, it would use the exhaustive method to calculate, and as soon as a path was typed, the program would stop. I've tried it with a normal computer, and sometimes, it can be cracked in a few seconds, and sometimes, it takes longer. ”

Wang Hao thought about it and said, "Can't you find the best path?" I think there was a team at Amriken who studied that the number of gods was twenty. ”

Ruan Hailong said indifferently, "They also use exhaustive methods to find the least steps, but the supercomputing server they use is better, after all, the amount of computing is too large." ”

"Is there a way to reduce the amount of computation?"

"It's hard, it's almost impossible."

Ruan Hailong said affirmatively, "This, I feel, should be a mathematical problem, there are many people who have studied it, and there are many ways to calculate it, but if you want to find out the minimum reduction steps of the Rubik's Cube, you can almost only use the exhaustive method." ”

"I've thought about it too......," he said, shaking his head.

The two just talked about the problem, just like talking about gossip and family life.

Wang Hao thought of more, it was a good opportunity to attend the conference and give a report, and he would definitely set up a task to get inspiration.

He hadn't thought about what mission to establish.

If it's mathematics, it's easy, and in the field of computing, a lot of research needs to be done by teams, not by individuals.

What Ruan Hailong said inspired him.

That's right!

"If you find a way to calculate the minimum steps to restore the Rubik's Cube, or rather, prove the number of gods, it will definitely be a breakthrough achievement."

"That's not just the Rubik's Cube problem, there are many similar problems involving exhaustive computing in scientific research and application fields......

He thought about creating a mission right away.

[Task 2]

[R&D Project Name: The Number of Gods Who Cracked the Third-Order Rubik's Cube (Difficulty: A).] 】

[Inspiration value: 0.] 】

[Complete A-level difficulty research, and get an additional number of teaching coins: 1000.] 】

[Task settlement, get the reward of teaching coins.] 】