Yan An spent three days getting the discrete math done, and in the last three days before the competition, he reviewed all kinds of data structures and algorithms again.

He has found a solution to the last question of the last selection exam without complex phase algorithms, and it is also the simplest method with excellent code volume and complexity, and he is more confident in the competition after mastering it.

On November 5, Mr. Zhang found a van and pulled them away.

Since the competition area of ACM changes every year, only a few places such as Chunshen are relatively fixed competition areas, so in the past, they all went to Chunshen to compete, and then they were beaten by the local snake boss Shenjiao there.

This year's situation is different from last year's, ACM/ICPC has a total of seven competition areas in Zhu Chiguo, and Xidao Province is one of them, which is hosted by Xidao Normal University.

The venue for this Xidao Normal University is the gymnasium of the Yaohu Campus, which is only a 20-minute drive from the Yaohu Campus of Yan'an's Nandu University.

That is, they represent the school in the competition, and they can't be too cold, otherwise Yan An and a few people will ride a small electric donkey and go over directly.

After arriving, I found that it was not only the teams in the province that came here to compete, Yan An not only found strong teams such as Tianjing Institute of Technology and Nanyue University of Technology on the list of participants.

Even the top two strong schools such as Pingjing University, Tianjing University, and Shenjiao have also sent teams over, if Yan An has paid attention to them, he will find that in fact, each competition area has their teams, but some are "regular troops" organized by the school, and some are voluntarily signed up to find someone to form a team.

Even Bingcheng University of Technology, which is far away from Xidao Province, sent three teams to participate in the competition.

Then Yan An saw an extremely strange scene, Nan Yuelai was wearing a long-sleeved single coat and shivering in the autumn wind. The ice city came wearing a big jacket and fanned the wind.

The whole school is full of people, and the closer you get to the gymnasium, the more people there are.

After all, there are a total of 330 teams participating in this division, and there are more than 1,200 people counting the coaches.

Although the venue in the announcement is in the gymnasium, after actually entering, I found that there is no computer inside, and this is only the scene of the opening ceremony.

It was the first time for Yan An to have this kind of scene, although there were many people, but it was completely different from the military training.

Most people are nervous, but a few people may be used to it, and they can't find this emotion on their faces, but look very relaxed.

Unexpectedly, Yan An found a familiar face in the crowd.

Just before he could confirm the other party, she had already noticed Yan An and walked towards him.

This is confirmed, and the high school is in the same class as him in the next class.

"It's been a long time, and you're here to compete?" Chen Shumin stood in front of him generously, her long hair was tied up casually and draped over her shoulders, although it was November, she was still wearing JK, her calves looked slender and well-proportioned with the blessing of stockings, and her upper body was wearing a volunteer's little red coat, carrying a volunteer waist bag issued by a Western Daoist teacher.

"Hmm."

The two hadn't seen each other for at least five months, and Yan An really couldn't think of anything to say hello.

After all, he himself is not a master who will greet others, and it is very difficult for him to find a topic.

His reaction was completely expected by Chen Shumin, after all, it was exactly the same as in high school, and he didn't get interpersonal training after going to college.

"Aren't you just a freshman, so you're ready to compete? I see that the other teams are all juniors and seniors, so you must be under a lot of pressure compared to them. ”

Chen Shumin said softly, with distress in her eyes.

Yan An nodded calmly, "It's really a little tiring during this time, but it's okay, it's not difficult to learn." ”

The second half of the sentence was automatically ignored, after all, in the three years of high school, she had never heard Yan An say anything difficult to learn, no matter what this guy would look at, and he often said that he was messing around.

stepped forward and naturally pulled Yan An to the outside of the gymnasium, "I'll take you around, there are too many people here." ”

didn't give Yan An a chance to refuse at all, and pulled Yan An away in the envious eyes of everyone.

Teacher Zhang didn't stop him when he saw it, and after he walked away, he smiled and said to the classmates around him, "See, this kid has my style back then."

In fact, I used to eat better than him, and I could make friends everywhere, all over the world. ”

"And then?"

Looking at his current state of life, Lin Chen can't connect the two at all. If the teacher is really so suave, why is he staying at home now?

Mentioning this, Mr. Zhang sighed faintly, "Later, later, it won't work, and I have an ex-girlfriend everywhere." ”

……

Taking advantage of the fact that the opening meeting was still some time, Chen Shumin pulled Yan An to a small road with few people.

Pulling up her drooping hair, revealing her small and crystalline ears, Chen Shumin peeked at the side of her eyes and asked curiously, "Where are you studying in college now?" ”

"It's in Nandu, not far from the Yaohu campus." Yan An replied casually, and he saw the canteen at the end of the path with sharp eyes.

Chen Shumin was a little surprised, with Yan An's learning ability, she thought she would go to Pingjing or Chunshen, after all, the stage there is bigger, and when the spotlight hits her body, this piece of gold will be more shining.

But that's fine, it's not far from you. Chen Shumin was happy in her heart, high school was always turned away thousands of miles away, and when she got to college, she wouldn't be like this.

Yan An looked at the canteen with straight eyes, and took the initiative to provoke the topic for the first time, "Is there anything delicious in your canteen?" ”

From an alien's point of view, the most valuable thing about Emerald is the cultural and artistic development of this planet's unique culture, art, history, and other human aspects.

But Yan An doesn't care about these, he pays more attention to food, and when he is full and eats well, he has more energy to study and then develop science and technology and return to Mingxing.

Chen Shumin was still trying to find a topic, and when she saw Yan An taking the initiative to provoke, she was overjoyed, "Yes, yes, the chicken legs in this canteen are particularly delicious." ”

Then Yan An ran to buy a chicken leg, well, I didn't ask Chen Shumin if I wanted it at all.

When the chicken leg arrived, Yan An's appetite was aroused by the fragrant taste, and he once again ignored Chen Shumin's resentful gaze.

"I'm still here, you don't have a bit of a gentleman's demeanor, don't you know how to ask me first?"

The chicken leg that had just come out of the oven was still very hot, Yan An took a bite of the hot breath, and felt very strange when he heard this, "Didn't you bring any money?" Isn't this possible to scan the code to pay? If you want to eat, just tell your aunt. ”

“……”

"I don't eat it." Chen Shumin was so choked that she couldn't speak, and only after half a sound did she grit her teeth and squeeze out a smile, and the words seemed to pop out from between her teeth.

"Well, don't talk without eating, you know, I don't like talking when I'm eating." Yan An blew a few breaths on the chicken leg to let it cool down quickly.

At the same time, he walked back, there was a game later, and he couldn't eat too much, otherwise he would want to go shopping again.

While holding the chicken legs, he walked towards the gymnasium following his memory, and Chen Shumin followed him angrily.

After walking a few steps, Yan An turned back, "Why are you following me?" ”

"I'm a volunteer, I can't do it." Chen Shumin found that the beauty of the distance generated by five months of not seeing each other had been consumed, and she remembered all kinds of annoying people of this guy in high school.

Yan An, who was murdered, returned to the gymnasium after dropping an inexplicable sentence, and did not forget to take a picture of himself with his mobile phone after eating chicken legs at the door.

Very good, I can't tell that I ate alone.