Xueba: I study hard in the wasteland world

Time always flies by. All units have distributed New Year's goods and are on Spring Festival vacation, which means it is another Spring Festival.

Although everyone complains every year that the New Year is getting less and less interesting, everyone celebrates the Spring Festival seriously every year.

Su Yu's hometown is Qilu Jiaodong. When she was a child, when the familiar "BGM" sounded, she would follow her relatives in the clan and kowtow to New Year greetings throughout the village.

But later, my grandfather passed away, my father was promoted, and he became more successful. Su Yu's family didn't go back to pay New Year's greetings for a long time.

My parents came to Yanjing, and Su Yu’s family spent the Spring Festival in Yanjing.

"Happy New Year to Uncle Jiang! Happy New Year to Aunt Zhou!"

On the first day of the new year, Su Yu's "big disciple" Jiang Changmao brought his wife and children to pay Su Yu New Year's greetings.

Su Yu's two children said hello sweetly and received two thick red envelopes.

"Academician Su, Happy New Year! Aunt Xia, Happy New Year!" Jiang Changmao's daughter also greeted Su Yu and Xia Ning obediently.

After taking one look at the ladylike and polite appearance of "someone else's daughter", and then looking at her own, Xia Ning instantly felt that it still tasted like someone else's. The happy Xia Ning gave Jiang Changmao's daughter two beautiful little gold bars.

Seeing that his daughter was embarrassed to ask for these two small gold bars, Jiang Changmao smiled and said to his daughter: "Take it, your Aunt Xia is rich!"

This made Xia Ning envious again. Look at how reserved her children are, and look at these two little bastards in her own family. They are not reserved at all. They started counting money on the spot after receiving the red envelope!

And after you click on it, compare it to see the difference.

Fortunately, the amount in the red envelope is the same. If someone has less or someone has more, it will be another bloody storm!

Xia Ning was helpless. Did her family lack the red envelope money?

In order to celebrate the Spring Festival for her children, Xia Ning specially ordered a hundred 100g small gold bars from a gold mine owned by Fruit Candy Mining. Su Wanxi and Su Wanxia used these small gold bars as building blocks.

Using gold bars as building blocks meant that the family was not short of money at all, but seeing how useless these two little bastards were after taking the red envelopes, Xia Ning was furious.

Xia Ning gave her husband Su Yu a look. Every time she took care of her daughter, her damn husband Su Yu would start protecting her. Xia Ning and Su Yu had quarreled several times over this.

"Teacher, have a great New Year!"

"Teacher, happy New Year!"

Then, those who came to Su Yu's small courtyard to pay New Year's greetings were Wu Jinyan, Xia Nai, Su Yu's second-term students, and their children.

"Come here, what else can you bring?" Xia Ning said with a smile, and then took the two people's things.

When Xia Ning was a child, she went out to visit relatives with her parents. She always felt that her relatives were hypocritical and disgusting when she saw her relatives smiling and saying, "Just come, what else can I get?"

Now she started saying it too.

"Oh, this little kid is so pretty! Come on, come on, I'll give you two little gold bars!"

Su Yu smiled and touched the mixed-race child of Wu Jinyan and Xia Nai. Not to mention, this mixed-race child was really pretty and looked very lovable!

"Hello, Chief!"

Wu Jinyan, who walked into the living room of Su Yu's house, saw Jiang Changmao and saluted respectfully.

"Don't be so formal!" Jiang Changmao smiled and waved his hand.

Then, Su Zeshan, Dong Nianwen, Gu Guangtao, Haas Bellamy, Yang Bin, Shao Zihan, students who graduated from the first and second periods of Su Yu, and two current students, Gao Bin and Chen Hongdao, came one after another. .

The students arrived one after another, and the original New Year greetings turned into a casual tea party just like in previous years.

The basement of the first floor of Su Yu's small courtyard was originally Su Yu's game room. Now everyone came here, so they drove away the children who were playing games here. They gathered in twos and threes to play mahjong. Playing billiards, exchanging the results of last year and the direction for the new year.

Su Yu, Dong Nianwen, Su Zeshan, and Gao Bin were sitting on the mahjong table, and the four of them were playing mahjong.

Su Yu was unwilling to play mahjong at first. To be precise, he was dismissive of mahjong. He always felt that he was so smart and was very good at mahjong, so he didn't bother to play.

But after playing a few rounds with her mother-in-law last year and losing completely, Su Yu realized that she really had no talent for playing mahjong!

The mother-in-law kept praising Su Yu for being sensible and deliberately let her go.

In fact, Su Yu wants to win more than anyone else!

But Su Yu just couldn't win, no matter how fast his brain worked, no matter how clearly he remembered the cards, or no matter how he adjusted the cards in his hand to maximize the probability every time.

He loses!

And "the more food you eat, the more you love to play." Finally, during the Spring Festival, when the students came, Su Yu naturally led them to play mahjong.

Although they were playing mahjong, the topics discussed at the mahjong table were mathematics and computer science.

After Su Zeshan played a "red" card, he picked up a card and said:

"Teacher, in a supercomputing experiment conducted by our team on the simple backtracking algorithm for the largest group years ago, the supercomputer ran for 1 microsecond on a scale of 20 vertices;"

"For 40 vertices, the running time is 1 millisecond; but for 60 vertices, the running time jumps to 1 hour."

"When the number of vertices reaches 80, it jumps from one hour to 90 years!"

"And when the number of vertices reaches 100, the running time jumps directly to 100 million years!"

"In other words, the size of the input vertices increases exponentially with the running time. When the number of vertices exceeds 50, it will actually become impossible to run. No matter how fast the supercomputer's processing speed is, it will not be able to run at all. "

Hearing this, Dong Nianwen, who was sitting at the mahjong table, said in surprise: "Brother, the Tianhe supercomputer you used this time has a continuous computing power of more than 6 billion times, right? With this kind of ultra-fast computing power, 100 The number of vertices requires 100 million years of calculation?”

"Yes!" Su Zeshan nodded and responded to his junior brother's inquiry.

After listening to what Su Zeshan said, Su Yu threw away a "forty thousand" card and said: "This means that the traditional computer language model simply completes the calculation, but if we complete the writing of np complete problem language, it may be necessary A calculation that takes 100 million years can be completed in just 1 microsecond."

"Hey." Su Zeshan sighed, nodded, and said, "Yes, but teacher, your project is quite difficult."

At this time, Dong Nianwen at the poker table said: "Teacher, our team from Donghai Jiaotong University is accurately covering the problem, that is, looking for whether there is a subset S* of S, such that every element in X happens to appear in S* Once, there was a good breakthrough.”

Su Yu touched the mahjong in her hand and thought about the problem Dong Nianwen mentioned. Su Yu had seen the results of Dong Nianwen's team. This result was a sensation for the world's academic community.

But for Su Yu's entire NP-complete problem project, it only helps Su Yu's algorithm research. From this, we can see how huge this project is.

Su Yu sighed softly and said: "This topic is really too huge."

With that said, Su Yu punched out the 30,000 yuan card she touched.

"Oops, there's a thirty thousand, what a fool~"

While Su Yu was still thinking, Gao Bin pushed down his cards. What a fool!

Accidentally, the cannon was fired again, and Su Yu was furious.

He, Dong Nianwen and Su Zeshan were playing mahjong and discussing the project. Only Gao Bin was playing mahjong wholeheartedly.

And Gao Bin, who was focused on playing mahjong, was about to win away all the chips from Su Yu and the others.

In the past, when Su Yu played mahjong with the students, when Gao Bin was not around, it was Su Yu who won a lot of money.

Now that he lost again, Su Yu said unhappily: "Don't discuss academics, just focus on playing mahjong!"

Seeing the teacher's little willfulness, Dong Nianwen and Su Zeshan at the card table looked at each other while holding back their laughter.

Then, after playing one round, Su Yu lost another round.

Su Yu glanced at Gao Bin, who had always won, unhappily. This student could only stay in university for the rest of his life, and only relatively pure universities could accommodate him.

Su Yu waved her hand at him and told him to get out of here without any courtesy. Then she waved to Jiang Changmao, who was sitting in front of the TV playing games, and said, "Changmao, come here and replace Gao Bin!"

"Okay teacher!" Jiang Changmao smiled and nodded.

Su Yu still liked his "big disciple" Jiang Changmao the most.

His EQ and IQ are absolutely high. Since he came on the scene, Su Yu has won two rounds in a row. More importantly, Jiang Changmao's feeding and checking of cards is so natural that no one can see it.

Su Yu had a great time.

Gao Bin, who was replaced, stood behind his senior brother Jiang Changmao with a serious look on his face, earnestly learning from his senior brother how to defeat a pair of good cards that he "listened to" immediately.

Although Gao Bin is not very smart, he is not a fool who doesn't understand anything. As soon as he sat down, he knew that he wanted the teacher to win.

But he really tried his best, but every time it was a "pinch" card, he could always touch it, and there was only the last "pinch" card left. He couldn't stop playing tricks, right?

"Ouch~"

But when he saw his senior brother playing tricks as soon as he touched the cards, but not playing tricks, but tearing apart a good deck of cards into pieces, Gao Bin looked at his senior brother Jiang Changmao like a fool.

Jiang Changmao glanced at Gao Bin behind him, who was looking at him like a fool, and said with a smile: "Junior brother, you still have a long way to go!"

With that said, Jiang Changmao played a card of nine.

Then, Su Yu was overjoyed: "It's up to you, I'll fight!"

"Come on, come on, God willing!"

At this moment, Su Yu didn't look like a respected scholar at all, but just like a gambler, going to play Pai.

Not to mention, he actually got the card he wanted: "Hahaha! Flowers bloom on the bar!"

"Wow, the teacher is awesome!"

"Yes, there are flowers blooming in the new year, which means there will definitely be a breakthrough in this year's project!"

"Yeah!"

Several students at the card table smiled and spoke.

Although she knows that the students are coaxing her, Su Yu really likes this kind of mindless stimulation. She has been working hard for a whole year, is there anything wrong with relaxing during the Chinese New Year!