In winter, the warm sunlight shines through the window, shining on Mu Xuan's fair and melancholy face, Mu Xuan noticed the dazzling brightness, suddenly opened his melancholy eyes, and looked at the time, it is now more than ten o'clock.

After Mu Xuan learned about the conditions required for skipping grades, he wrote an application to Director Zhao, who was in charge of this aspect, and at the same time, Mu Xuan was approved to go to the classroom for professional courses during this period, and after learning the news, Mu Xuan felt very excited, so that he had enough time to improve his strength, and no longer had to waste time on boring professional courses.

Although Peking University is a cutting-edge university in the country, many things are still not connected with the new knowledge in the field, and Peking University can learn things, only to learn the old knowledge of the past few years, or to learn the precipitated things of the entire history of the past, and the environment for real learning knowledge is actually in the society.

The whole phenomenon is common to all universities in the country.

And these old knowledge, it is no exaggeration to say that Mu Xuan has already been familiar with it, and for the new knowledge, Mu Xuan deeply understands how fast their replacement is

Mu Xuan got up quickly, and after washing, he walked into the kitchen, turned on the insulated pot, and looked at the still steaming breakfast, Mu Xuan smiled slightly, at this time, there was a warm current of happiness flowing in Mu Xuan's heart, and he couldn't help but whistle, and the feeling of happiness was overflowing.

After Mu Xuan had breakfast, he sat in front of the computer with a black screen, which still showed the system initialization. Its progress increased to 3%. Mu Xuan shook his head. Then he opened the notebook that the blood elder gave him that was comparable to a small calculation.

Although Mu Xuan backed up his commonly used tools, Zhantian visualization tools, blood and drink analysis tools, as well as weird viruses, and some other detection software, there were still some software that were not fully backed up, and the writing of those software did not take long, so Mu Xuan planned to complete the writing of these software in the next day.

Time gradually disappeared in Mu Xuan's programming

Suddenly. A pleasant bell rang

Mu Xuan picked up the phone, looked at it, and pressed the answer button: "Sister, are you coming back?" ”

"Well, but Yunyun has a treat tonight, and I will introduce someone to you then." Zhang Yue said on the other side of the phone.

"Are you a member of the ACM Programming Competition?" Mu Xuan thought about it, he remembered that Bai Yunyun had told him last time that he would introduce him to another team member in a few days.

"Well, so you get ready now, Yunyun and I will drive over to pick you up shortly." Zhang Yue urged Mu Xuan on the other end of the phone.

“OK！” Mu Xuan hung up the phone. Close the computer and start preparing

Half an hour passed. At this time, Mu Xuan had already finished preparing and was looking at the love apartment, and there was laughter from time to time, just when Mu Xuan saw a laugh and couldn't help laughing, Mu Xuan's mobile phone rang again.

"Mu Xuan, let's go downstairs, you close the door and come down!" Mu Xuan answered the phone, and Zhang Yue said.

"Yes, got it." Mu Xuan stood up and responded, and at the same time walked out of the living room and closed the door.

After Mu Xuan left the community, he saw Bai Yunyun sitting in the car with his slender jade hand out of the window and signaling to him, Mu Xuan walked over and said with a smile: "Sister Yunyun, long time no see!" ”

"Look, this kid is getting naughty and naughty!" Zhang Yue glanced at Mu Xuan and said to Bai Yunyun.

"I think that's good! Brother Mu Xuan, do you say? After Bai Yunyun got into the car at Mu Xuan, she started the car and drove towards her destination.

"Yunyun, since you think it's good, then it's good for you to marry my brother, I think it's good for you to become my brother's daughter-in-law, hehe" Zhang Yue sat in the co-pilot and answered.

"Stinky girl, if I wasn't driving now, I wouldn't scratch you to death, but it looks like your brother likes you!" Bai Yunyun refused.

When Mu Xuan heard this, his heart trembled, although Mu Xuan knew that it was just a joke, but it still caused a lot of ripples in Mu Xuan's heart, and now Mu Xuan's feelings for Zhang Yue were also subtle and tight, and that sensitivity was no less than that of a woman.

Mu Xuan has suppressed Zhang Yue's emotions for too long, and he doesn't know how long he will be suppressed, maybe he will no longer be able to bear that depression and explode one day, and then tell her this secret, he can't predict how much hindrance he will be after revealing this secret, I don't know if morality can allow it, and how he should break this secret, thinking of this, Mu Xuan has a feeling of fear, yes, just afraid.

Mu Xuan was afraid that when he disclosed this secret, that warm sense of happiness would disappear in an instant, and the harmony of the past would disappear in an instant, if it was really this consequence, then Mu Xuan would rather bury this secret deep in his heart.

All this makes Mu Xuan so overwhelmed, this feeling will only appear in front of the old sister, the more Mu Xuan thinks about it, the more confused he feels, and now he can only take one step at a time, before this Mu Xuan must shorten the distance between him and the old sister in terms of time, and must not let the old sister fall in love with anyone, never, thinking of this, Mu Xuan shook his head vigorously.

"Brother, what's wrong with you?" Mu Xuan's action, Zhang Yue also saw it from the rearview mirror, so he stopped joking with Bai Yunyun, and then tilted his head and asked.

At the same time, Bai Yunyun also asked with concern: "Brother Mu Xuan, what's wrong with you?" Is it a bit of motion sickness? ”

"Well, I'm fine, but" Mu Xuan looked at the two of them, and there was a solemn taste in his melancholy eyes.

"But what?" The two women asked aloud at the same time.

"But the feeling of having two sisters caring is comfortable!" Mu Xuan said slyly.

"Cut" The two women looked at each other, and suddenly felt that they were being put on a small position by Mu Xuan.

"By the way, Sister Yunyun, is there another member of the group who is your classmate?" After the joke, Mu Xuan remembered the true purpose of this trip.

"It's not my classmate, he's my senior. I'm a junior. But now it's out of school. But he retains his student status, so he is eligible to participate in this ACM programming competition, but he is a great man, and he is quite good at mixing in the defense software company during the internship period, and now he is worth more than three million! Bai Yunyun said.

"I went out for an internship in the second semester of my sophomore year? Earned more than 3 million in half a year? Mu Xuan was surprised.

"Well, but now that he has resigned, he plans to start his own company, but now he doesn't know what to do. Now I was worried, so I called him out to join us in the ACM Programming Competition. Bai Yunyun responded.

"Is that so? But it doesn't seem like you can go out for an internship without completing your studies, right? Mu Xuan muttered.

"Well, there are always some exceptions, let's not talk about this for now, and then I will explain the specific situation of ACM to you in detail during the meal." When Bai Yunyun talked about another group member, she obviously changed the topic.

"Yes." Mu Xuan nodded and said.

The sun has been hidden, and the winter day and night have always been so rapid. Bai Yunyun's car shuttled quickly through this beautiful city, with alternating lights. People can't help but feel a little psychedelic dream-like feeling, which seems to be very sad, lonely, or lonely.

Twenty minutes later, Bai Yunyun's red sports car stopped in the basement of Ling Kong's heart.

"Hollow Heart?" Mu Xuan got out of the car, and after seeing the surrounding environment clearly, he was a little puzzled.

"What? Not satisfied? Bai Yunyun said with a smile.

"No, as long as Sister Yunyun likes it." Mu Xuan said embarrassedly.

"Don't worry, I won't cry like last time, I've already walked out of that memory, but thank you Brother Mu Xuan." Bai Yunyun said as she walked.

Due to its unique design, Ling Kong Xinyu can make people with unforgettable memories fall into it, and it was so Bai Yunyun almost fell into that memory forever, and she cried very much.

Therefore, Mu Xuan was a little worried that Bai Yunyun would choose here again, but since Bai Yunyun said that he had walked out of that memory, then Mu Xuan had nothing to worry about, but hoped that Bai Yunyun would really come out as she said.

Mu Xuan and the three of them were talking, and before they knew it, they were on the rooftop of the volley.

"Bai Yunyun, here" When Bai Yunyun and the three of them walked onto the rooftop, a figure greeted them and greeted them with a smile.

At the same time, Mu Xuan also saw the person coming, and saw that the other party was close to 1.75 meters tall, dressed in a black suit, with dark skin and bright eyes, but the overall temperament belonged to that kind of mature and stable.

"Li Shengyi, long time no see." Bai Yunyun greeted him with a smile, not as indifferent to strangers at all, and it seemed that the relationship between the two was not ordinary.

"Let's go, let's go to our seats first and then talk slowly." Li Shengyi nodded to Zhang Yue and Mu Xuan, and after signaling, he said.

So the group walked towards the predetermined position.

"Let me introduce it first, this is Li Shengyi, a junior senior, here, it's the primary school brother who plans to skip a grade, this is my friend's name is Zhang Yue." Bai Yunyun said after sitting down.

"Hello!" Li Shengyi smiled politely at the two and said.

"Hello senior!" Zhang Yue and Mu Xuan responded at the same time.

After that, Mu Xuan and the others chatted for a while, and then slowly got to the point

"Let me introduce the rules of the ACM Programming Contest first, and then you can ask me if you have any questions." Lishengyi Road.

"That's fine!" Mu Xuan agreed.

"ACM Programming Competition is a college student program competition jointly organized by Asian countries, divided into regional competition and general competition, the regional competition is carried out within the country, lasts for 3 days, the top three in the regional competition enter the general competition, which lasts for five days, the contestants must participate in the form of a team, and the number of team members is limited to three." Li Shengyi began to introduce.

Hearing this, Mu Xuan nodded, and he also learned this information from Bai Yunyun.

"The regional competition lasts for five hours, usually 6 to 10 test questions, and is completed by three players from the same team using the same computer, when a test question is solved, it is submitted to the judges, and the judges determine whether it is correct, if the submitted program is not running correctly, the program will be returned to the team, and the team can modify it and submit the answer again." Li Shengyi continued.

"Incorrect operation of the program refers to one of the following five situations: first, run-timeeerror; second, the run time-out (time-limitexceeded); Third, the result of the run is wrong (wronganswer); Fourth, the output format of the running result is incorrect (presentationerror); Fifth, run the five scenarios of memorylimitexceeded. Li Shengyi took a sip of coffee and continued.

"After the end of the competition, the participating teams are ranked according to the number of problems solved, if the number of problems solved is the same, according to the length of the total time ranked, the total time is the sum of the time taken to solve each problem, the time taken to solve a problem is the time from the start of the competition to the acceptance of the submission plus the penalty time of the problem, the penalty time, each submission is not passed, the penalty time is 20 minutes, and there is no time to solve the problem." Li Shengyi looked at everyone and still said.

"American English is the working language of the competition, all written materials of the competition, including test questions, will be written in American English, other languages can be used in regional competitions, and the finals are real programming, and the programming languages used include PASCAL, C, C++ and java, and other languages can also be used, and the specific operating system and language version vary from year to year." Li Shengyi said in one breath.

"At that time, the Chinese region will be divided into several competition points, last year's competition points were Harbin Institute of Technology, Donghua University, Wuhan University, Zhejiang University, University of Science and Technology of China, these five universities undertake, according to the situation in previous years, this year's host will not change much." Li Shengyi paused and said again.

"The main matters of ACM have been introduced, do you have any questions for Senior Brother Mu Xuan?"

"Judging from past history, has Peking University not entered the finals once?" Mu Xuan wondered.

"Hehe, not once, all of them were taken over by Shanghai University and Zhejiang University." Li Shengyi smiled.

"These two universities are so strong?" Mu Xuan was surprised, Peking University has never won the championship in the finals once, which is a bit unbelievable, Peking University is a gathering of top masters from the mainland, and Shanghai University and Zhejiang University are only students in the coastal areas, are these people so talented?

"It's really tough, but last time Peking University had a chance to win the finals." Li Shengyi said this, paused suddenly, and then remained silent.

At the same time, Bai Yunyun also got up and said with a smile: "I'll go to the bathroom." ”

"Yunyun" Zhang Yue saw Bai Yunyun leave the seat, and at the same time chased after him.

"Senior, what's going on?" Mu Xuan looked at this situation, and it was obvious that there were some reasons for this. (To be continued......)