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"You're a lot faster than I thought you would, yes, yes. ”

Gu Lao nodded slightly: "What surprised me even more was that you all solved the third question." ”

"Although the two of you have completely different answers and ideas, the final answer is still the same, whose is this one?"

As Gu Lao spoke, he pulled out one of the answer sheets.

"Mine. Lin Yi glanced at it and said.

"Well, your solution is relatively more straightforward, and it is a lot more neat, and the third problem is deduced with twenty-eight formulas, like a man. Gu Lao laughed.

"Mathematics is like fighting a war, taking a knife and slashing forward until you break through the encirclement and find the answer. ”

Then Gu Lao looked at another one: "This, your name is Liu Luran, right?"

"Hmm. Liu Luran nodded slightly.

"Your solution ideas are relatively more complicated, although you can't say wrong, but in terms of efficiency, it is a little slower. ”

"You've got 42 formulas, and you've got inequalities and probabilities in opposition to them, and that's a bit of a stretch. ”

After Gu Lao finished speaking, he put the two answer sheets on the table: "What I want to tell you is about how to achieve better results in the Olympiad when you have a foundation. ”

"The first is to be fast, and the second is to be accurate. ”

"Fast means that you should solve the problem quickly, and the criterion is that your solution idea should be correct. ”

"Generally speaking, the direction of logical thinking emphasized in the Olympiad is an axis in the opposite direction, from which you need to find the most critical one or several points to solve the problem, and find the final answer in the way of point breaking the surface. ”

Gu Lao sat there and talked eloquently, telling all his years of Olympiad training experience and some common Olympiad problem-solving skills, and also found a few of the most representative topics to explain and analyze.

Lin Yi and Liu Luran were there listening.

The presentation lasted two hours.

Gu Lao took a sip of water and moistened his throat: "I have also said everything that should be said, because the time is relatively tight, and there is no extra time to say it to you a second time." ”

"As for how much you can listen, that's your own business. ”

After Gu Lao finished speaking, Lao Liu Tou also nodded at this time, and looked at Lin Yi and Liu Luran: "After you go back later, think about what you heard today in your head." ”

"Yes, besides, you can go out and play now, and I'm going to have a few more games with your teacher. After Gu Lao finished speaking, he couldn't help but start to set up chess pieces, and saw that Lao Liu shook his head: "You have to win, I won't give up." ”

"That's it, this game will definitely win you!" Gu Lao looked confident.

"You guys go out and have fun, you can go upstairs to have a look, if you want to go back, go back directly, you don't need to wait for me." I don't know when it's going to go down tonight. Old Liu Tou had a rare gentleness on his face.

Lin Yi and Liu Luran had no intention of staying here, and after thanking them, they left the room.

As soon as the two left, Lao Liu Tou looked at Gu Lao: "Is it Miaozi?"

"Yes. Gu Lao nodded.

"Which seedling is better?" asked Lao Liutou as he continued.

Gu Lao glanced at him: "That one is called Lin Yi." ”

"Why?" Old Liu Tou looked curious, and wanted to know what his old friend said about Lin Yi.

"The thought is deep. After holding it for a long time, Gu Lao held back five words.

Seeing that Lao Liu Tou was a little puzzled, he picked up the answer sheet that he had just put on the table and handed it directly to Lao Liu: "See for yourself." ”

Lao Liu Tou took it and looked at it twice, his eyes were stunned at first, and finally shocked.

Gu Lao rolled his eyes: "I don't know where you dug up the seedlings, did you see the solution process of the last problem? The solution process named Lin Yi is only one formula away from the optimal solution process I can think of." ”

"If he hadn't written it beforehand, he would have been a math genius. ”

After listening to Gu Lao's words, Lao Liu Tou laughed, but did not say anything more, but began to play chess.

......

"Where are you going?" Out of the room, Liu Luran looked at Lin Yi and asked.

"Of course I want to go back to sleep, otherwise why stay here. ”

Lin Yi's tone was light, about the Orsay or something, in fact, Lin Yi didn't care at all.

The reason why I participated in the competition was to get a good result, and then go home to show my mother, which was something that my mother could brag about.

Zheng Jiayun has been an excellent teacher all his life, and because Lin Yi's grades are too bad, there are many people talking about it behind his back.

My son can't teach well in learning, so why should he be an excellent teacher?

Every time Zheng Jiayun heard this, although he couldn't see anything on the surface, Lin also knew that his mother was still very sad in her heart.

Lin Yi pressed the elevator, waited until the elevator came, and after getting on the elevator, what he didn't expect was that Liu Luran took the first step to press the button on the twenty-third floor.

"It's all here, it's good to go up and take a look and then leave, it's considered relaxing. Liu Luran's tone was a little cold, and she couldn't hear any emotion.

In fact, when she said this, Liu Luran's heart beat wildly, but she covered it up well.

Liu Luran didn't understand why her head was hot just now and she made such a choice.

Seeing that Liu Luran had already pressed the elevator, Lin Yi didn't say anything more.

When the elevator reached the twenty-third floor, the door opened, and the two got off the elevator.

"I've been to this place once before, and I can see most of the river city from there, especially at night, when the street lights are all on, it feels very good. ”

Liu Luran walked beside Lin Yi, because the atmosphere was a little dull, so she unconsciously found a topic.

The two walked all the way to the end, Liu Luran pushed open the door and walked into the hall on the twenty-third floor.

It was already past nine o'clock in the evening, nearly ten o'clock.

But there were still quite a few people in the hall.

"This place is generally rented out for some banquets and parties, and people staying in the hotel can also come up for sightseeing. ”

Liu Luran stepped on the marble floor as he spoke, and walked forward.

She stood in front of the huge floor-to-ceiling window, looking through the glass, watching the traffic under the glass window from afar.

"Would you like a place like this? When you look at the bottom from a high vantage point, it feels like the whole world has become very small, like a chessboard. Liu Luran turned her head and looked at Lin Yi beside her.

With the help of the hall lamp, Liu Luran saw Lin Yi's angular face.

She suddenly realized that she didn't know when, Lin Yi's face looked over, and it was actually able to give people a cold feeling like a blade.