with umbrella

C University has always been keen to participate in various competitions. Cheng Xiao and his team, as the main force in recent years, have naturally known many outstanding students from domestic and foreign universities.At noon on Saturday, Toshiyoshi Takahashi of the University of Tokyo and another boy sent a connection request on time, intending to simulate together.

They had already brushed the school's oj countless times, so they made their own questions and wrote their own test groups.But after all, it was before the game, and several people decided not to disclose the code, but checked the compiled program with each other in the end.

Junji Takahashi has been stationed in Leetcode all year round. It can be said that he loves algorithms crazily. In the previous Asian Challenge, he and Cheng Xiao were assigned to a pair programming group.Since then, Junji has been deeply impressed by Cheng Xiao, and has specially prepared for today's simulation for a long time.

"Cheng Xiao, Jiang Zhuang, long time no see." Junji said hello in Japanese English.

"Long time no see." Cheng Xiao looked at the screen and greeted him, "How are you doing?"

"Not bad." Junji said, "I look forward to playing against you again."

"Then let's start?" Jiang Zhuang smiled, straight to the point, "Time four hours, and finally exchange program tests."

"Okay." Junji sent the question over, looking forward to it, "I have studied Cheng Xiao's line segment tree structure for a long time before I came up with the third question, I hope it can bring you some challenges. Cheng Xiao, to be honest, I miss it a little Your array algorithm is gone."

"I've read all your recent OJ records." Cheng Xiao nodded, and sent out the topic he and Jiang Zhuang had prepared, "It's really amazing."

When these people get together, it's no different from a formal game.There are five questions in total. They share the timer and can see the progress of others, so they clack on the keyboard with their hands, and there is no gap at all.

Four hours passed in a flash between lines of code, and Junji couldn't wait: "Can you let me test Cheng Xiao's third question first?" He added some innovations when he wrote the question, and at the moment he was very curious whether Cheng Xiao had covered all the situations.

"Of course." Cheng Xiao compiled the program and uploaded it to the shared cloud, "Welcome to advise."

Junji was full of anticipation, but he was stunned after running Cheng Xiao's code, frowning and looking at the screen, biting his lips tightly and saying nothing.

"Is there a problem?" Cheng Xiao wondered.

Jiang Zhuang grabbed his clothes and asked in a low voice, "Did you use the algorithm two days ago?"

Cheng Xiao nodded slightly.

"The result is no problem." Junji said, "But... the running time is 74 milliseconds faster than ours. Are you sure you are using a segment tree?"

"I made some small changes on the basis of the line segment tree, which is still immature." Cheng Xiao said lightly, "It's also a tree structure."

"He just posted it on the school OJ two days ago, and we were all taken aback." Jiang Zhuang praised, "Super God."

Junji was shocked: "Maybe we can talk together after the game?"

"Don't listen to Jiang Zhuang's nonsense, how can you be so magical." Cheng Xiao rubbed his eyes.

Junji heard some overtones, "You don't plan to release the source code?"

"I don't plan on it for the time being." Cheng Xiao said, "It's only when I write it that I feel that the topics of the past two years are a bit impetuous. To be honest, this is the product of a competition, and I really don't know when I can use it."

Junji sighs, "Maybe you're right."

They did not continue this topic, and started testing the system.Cheng Xiao passed the first four sets of codes, but the fifth question was overturned by the opposite test.Cheng Xiao then typed out the test he had conceived and sent it to them, wanting to discuss it with them, but the program that the two men at Dongda University had originally prepared failed the test.

"Xiaoshen is indeed Xiaoshen, there will always be surprises." Junji smiled, "When will you arrive?"

"Number 29." Cheng Xiao said, "What about you?"

"One day earlier than you." Junji suddenly remembered, "By the way, Professor Matsumoto is invited this time, and will go with him."

"Really?" Jiang Zhuang shouted ahead of Cheng Xiao, "Algorithm expert himself! Can I ask him to sign two words of encouragement on my algorithm book?"

Junji turned off the shared whiteboard, sat in a chair in a daze, and the professor came in behind him: "Did something happen? The simulation was stimulated?"

"Do you still remember Cheng Xiao?" Junji said, "Students from C University in China, we met in previous competitions."

"I remember." The professor nodded, "I have seen his code, and his thinking is very clear."

Junji ran the program sent by Cheng Xiao: "He optimized the line segment tree, which is very efficient."

The professor was thinking about it, and just wanted to ask Cheng Xiao if he planned to open source, only to hear Junji repeat Cheng Xiao's original words, staring at the running time on the screen: "He did it right."

Then, Professor Matsumoto returned to the office, found Cheng Xiao's homepage on github, and followed it without hesitation.

After Liang Chengyan finished work, he called Fang Kai out for dinner, "Why did you get yourself in?"

"Take a detour?" Fang Kai pursed his lips, "That's right, Brother Zhan doesn't mind anyway."

"I mind." Liang Chengyan glanced at him.

Fang Kai's word "also" at that time was analyzed and analyzed by netizens. In the end, [Fang Kai came out] was also on the hot search, and it happened to be next to [Liang Chengyan came out]. Netizens who were late for eating melons almost misunderstood .

Liang Chengyan continued, "But...thanks."

"Small matter." Fang Kai asked, "Is the prosecution going well?"

Liang Chengyan nodded, "Ni Song left a recording, which invaded privacy and blackmailed them. They are finished."

Fang Kai was satisfied, "It deserves it." He flicked his phone, and suddenly moved the screen to Liang Chengyan.

Liang Chengyan glanced, "Do you think that everyone is like you and likes to read this kind of cartoons all day long."

"These little girls are so talented now, if you don't look carefully, you really won't be able to." Fang Kai admired it by himself, "You and Cheng Xiao's fanart is very well drawn, really don't you want to read it?"

"Send me the link." Liang Chengyan took out his phone, "Are there any more?"

Cheng Xiao packed up his things and sent a video to Liang Chengyan: "Hey Brother Xiaokai is here too."

"Cheng Xiao, do you know what Liang Chengyan is looking at?" Fang Kai preemptively struck.

Liang Chengyan stared at him: "Don't try to influence me to see my boyfriend just because you can't see him."

Fang Kai sat down to the side: "Excuse me, you continue."

Cheng Xiao was a little embarrassed: "I don't have to stay in the laboratory next weekend. I just wanted to book a ticket, but I forgot to ask if you are free then."

"If you come, you must be free." Liang Chengyan blinked, "Send me the time, and I will pick you up."

"What were you looking at just now, why are you laughing like this?" Cheng Xiao felt that something was wrong.

Liang Chengyan said: "If you say something nice, I'll tell you."

Cheng Xiao glared at him, lowered his head to look at the computer screen, then widened his eyes, his face was full of surprise: "Oh my God!!!"

Without knowing it, Liang Chengyan went in: "What's wrong?"

Cheng Xiao excitedly patted the table: "Professor Matsumoto from the University of Tokyo!!! He has followed my github! Oh my God! We are mutually closed!"

"Who is that?" Liang Chengyan asked, "I haven't heard you say that."

"One of the best algorithm masters in Asia! I have read a lot of his articles!" Cheng Xiao clutched his heart, "He is really young and promising!"

Liang Chengyan curled his lips, and waited quietly for him to finish his excitement before clicking twice on the screen: "Look at Weibo."

"Ah?" Cheng Xiao was still out of state, subconsciously agreed, "Okay."

He clicked on the account of his mobile phone user, and among the new fans was Liang Chengyan's Weibo account. He wondered, "Didn't we pay attention to each other a long time ago?"

Liang Chengyan didn't seem to be able to hear, he lowered his head, clicked to unfollow and then clicked to follow, Cheng Xiao's new fans kept showing that he and Liang Chengyan paid close attention to each other.

Cheng Xiaoxu clenched his fists and thumped the table, the corners of his mouth slightly raised: "I'm so excited!"

Liang Chengyan finally raised his head: "More excited than before?"

"Of course." Cheng Xiao nodded, "My boyfriend and I are related to each other on Weibo."

The author has something to say

happy heart :)

I was thinking about where Xiaoshen would be deducted points in the competition, so I ran to see the results of last year's codejam, and knelt down to everyone :)