Xiao Huanxi: I Broke God's Forbidden Zone

Qiao Yingzi:  …

"—[-]" Qiao Yingzi was so angry that she gritted her teeth and snorted coldly, knowing that the bastard in front of her would say such a thing.

But facing Tao Cheng, she has nothing to do.

"The world is impermanent, there is always a contingency." Qiao Yingzi pouted and said angrily.

Tao Cheng continued to respond calmly, "That's for you."

Qiao Yingzi was speechless. She felt that if she continued to talk to Tao Cheng, she would not be able to be pissed off by Tao Cheng.

"You must calculate it within thirty seconds, otherwise, you will lose." Qiao Yingzi took out his notebook and prepared to draw the problem.

But in the end, Qiao Yingzi had just finished speaking, when he heard Tao Cheng say indifferently, "Thirty seconds? Are you insulting me?"

Qiao Yingzi was stunned for a moment, and before he could speak, he saw Tao Cheng slowly raise his three fingers, "Three seconds."

[Ding, received negative emotions from Qiao Yingzi +20! 】

Qiao Yingzi felt unhappy in his heart. If he hadn't known that he couldn't beat the guy in front of him, Qiao Yingzi would have thought of beating Tao Cheng.

"You... well, that's what you said, don't regret it."

Qiao Yingzi gritted his teeth and said, and then drew a circle on the paper to represent the city, and the city was surrounded by two rivers.

Above the river, there are a total of 7 bridges, connecting the inside and outside of the city into one.

"Residents in the city go to and from these seven bridges every day, so how can I walk all the seven bridges at one time, and each bridge can only be walked once?"

While Qiao Yingzi was talking, Qian Sanyi and others also came over curiously.

When they saw the topic, the first thing they thought of was "this topic is very simple".

In several people's minds, he began to calculate.

Tao Cheng's eyes closed slightly.

one second,

two seconds,

Three seconds!

In the third second, Tao Cheng opened his eyes.

"impossible!"

The simple three words made everyone stunned.

As for Qiao Yingzi's eyes, she was stunned for a moment, her brows furrowed slightly, she looked at Tao Cheng suspiciously, and said, "Impossible? What do you mean?"

Tao Cheng spread his hands, "It's impossible to fulfill this request, your request is a fake request."

"You're just trying to make me spend enough on the calculations to fail."

Qian Sanyi and the others all looked at each other in dismay, as Tao Cheng said. Anyway, after hearing Qiao Yingzi's words, they all started to plan subconsciously.

After all, where did you think that this problem would not be established.

"Yingzi, is there really no answer?" Fang Yifan looked at Qiao Yingzi speechlessly.

If this is the case, then this Qiao Yingzi can be considered a bit of a fool.

Qiao Yingzi suddenly laughed dryly and nodded. ,

"How did you figure it out?" Qiao Yingzi asked curiously.

In fact, this question was told to her by her best friend and asked her to calculate. She calculated for a day, but she couldn't find the answer. In the end, her best friend came directly.

A sentence without an answer does not hold at all.

When he heard this answer, Qiao Yingzi was so angry that he almost smashed the table.

Of course, she also knew that this question was a tricky game, but who made Tao Shen, she could only use this method to win the other party.

But what I never expected was that it took only three seconds for Tao Cheng to actually see the problem that he had spent a day on.

In front of Tao Cheng, Qiao Yingzi was deeply frustrated....

She found helplessly that in front of Tao Cheng, she was a scumbag.

Tao Cheng clicked a few times on the picture, and then used dotted lines to link all the dots, and each of the dotted lines of the link passed through the bridges.

"Actually, the land on both sides of the river and the islands in the river are just the connection points of the bridge, and its shape and shape have nothing to do with the problem. Therefore, it can be

Think of them as 4 points. As for these seven bridges, they are the seven routes that must be passed, and their lengths and bends have nothing to do with the question itself. "

After Tao Cheng finished speaking, Qian Sanyi and the others couldn't help but nodded slightly.

"So, we can simplify this diagram and get a mathematical model like this."

While speaking, Tao Cheng drew two perfect circles on the paper. The contact point between circle 1 and circle 2 is D, there is a point C on circle 1, and a point B on circle 2, and in front of the two circles, return

There is a point A, connecting A and BCD respectively, it becomes the mathematical model of that problem.

"Looking at the picture, you can see that for any figure that can be drawn with a single stroke, apart from the starting point and the ending point, whenever you draw a line with a stroke and enter one of the points

You also need to draw a line away from this point, otherwise, the graph cannot be drawn in one stroke, that is, every point in the graph except the start and end points

They are all connected to even lines. "

4.8

"This kind of point is called an even point, otherwise it is a singular point. If the starting point and the end point coincide, the coincident point should also be connected to an even number of lines, so this point is also called a

Even points, if the start and end points do not coincide, then these two points are connected with odd lines, so they are both odd points. "

"Therefore, a figure that can be drawn with one stroke must have a singularity of 0 or 2."

Qian Sanyi and others thought carefully about what Tao Cheng said just now.

Although they are academic masters, their thinking ability is not as fast as Tao Cheng, so when they hear Tao Cheng's words, they still have to think carefully.

Fan's.

Finally, they all nodded.

"Well, I think so too."

At this time, Qiao Yifan held his chin with one hand, looking like an old pedant, and nodded with a pretense. .

Chapter two hundred and forty-two unanswered questions [five more]

It was originally a serious discussion topic, but when Fang Yifan interrupted, the original serious atmosphere immediately collapsed.

Qiao Yingzi and the others looked at Fang Yifan with a funny look.

"You scumbag can actually understand it? Well, let's talk about it, what did Tao Shen just say?"

Qiao Yingzi made a deliberate run.

The moment he heard this, Fang Yifan's complexion completely collapsed.

Qian Sanyi looked at Fang Yifan with a smile, and said, "Fang Yifan, have you heard the story of overcharging?"

Seeing these people making a fuss, Tao Cheng couldn't help but have a strange feeling in his heart.

There seemed to be a little more "warmth" in my heart that I had never felt before.

"Is this...is it a strange emotion between friends?" Tao Cheng frowned and muttered to himself.

This math problem has not been finished yet, and Tao Cheng hastened his speed a little bit, and solved this problem without wasting everyone's time.

"I said, I'm not going to lose, well, let's play 25 now, but where do we go? How do we play"

Tao Cheng looked at Qiao Yifan lightly.

In fact, he didn't need to analyze it, he could know that in terms of his ability to "play", this Qiao Yifan was definitely considered a scholar-tyrant.

Seeing Tao Cheng's eyes moving over, Qiao Yifan patted his chest happily, "Go, I already made arrangements for today, we will go to Jingshan Amusement Park first, haha

Haha, I've long wanted to take a ride on the 'Tianxiandizhuan' over there, and there is also a roller coaster, tsk tsk, it is said that no matter how daring people go up, their legs will tremble when they come down."

After Qiao Fan finished speaking, he couldn't help but look at Tao Cheng with a funny look.

At this time, he was really curious, if Tao Cheng got on the terrifying roller coaster, would he scream in fright.

Qiao Yingzi and others obviously have been to Jingshan Amusement Park, and naturally they know the roller coaster there.

Qiao Yingzi went up there at the beginning, but after coming down, she had nightmares for several days in a row.

Since then, she has had a psychological shadow on the roller coaster over there.

Therefore, when he heard Qiao Yifan's proposal, Qiao Yingzi was ready to refuse.

However, Qiao Yingzi also saw the clever look in the boy's eyes.

Qiao Yingzi immediately understood the plan in this kid's heart.

To tell the truth, Qiao Yingzi is also very curious, what kind of person Tao Cheng looks like when he usually looks so cold.

And anyway, it's fine if you don't go up by yourself, but you can still see a good show, why not do it?

"I agree."

"I agree too!"

……

For a time, Qian Sanyi and others agreed.

Obviously these people are thinking about the same idea as Qiao Yingzi.

In fact, even Qiao Yingzi and others can see the tricky, how could Tao Cheng not be clear?You don't even need a micro-expression to figure this out