Later, when a guest came, he inserted the piece of paper into the book beside him.

As a result, when he remembered to "destroy the corpse and destroy the traces", the piece of paper disappeared.

"But, it should be fine..."

The shopkeeper muttered to himself.

His store is not big, and most of the people who come to buy books on weekdays are old people and children.

The one who took the gift today was a young mother who came to buy a drawing book for her daughter.

The mother he knew, whose name was Lin Qingqing, lived nearby and worked as a clerk.

When the programming book she gave her fell into her hands, 80% of it was about to fall into ashes.

Could it be that her children will be free to read programming books?

Besides, in order to prevent unidentified people from breaking in, a pure newcomer will be tested heavily before entering the forum.

Those questions are not something ordinary people can do.

Thinking like this, the shopkeeper felt relieved.

...

On the other side, Lin Xiaotang, who was sitting in front of the computer at home, had no idea what the shopkeeper was thinking.

When she got home, she turned over all the programming books and taught herself by comparison.

Because of many years of study experience, learning programming languages ​​and programming is not a problem for Lin Xiaotang.

It only took about a month for her to master these contents proficiently.

It's just that these things are just the foundation after all.

Next, she needs to learn something more esoteric.

At this time, Lin Xiaotang, who was flipping through the book, found a yellowed scratch paper from the "C Primer Plus".

On it was a line of crooked letters that looked like a link to a website.

Lin Xiaotang didn't know where this piece of paper came from.

However, considering that it appeared in the programming book, Lin Xiaotang still opened the webpage and entered the URL.

However, to her surprise, after she pressed the Enter key, what popped up on the computer screen was not a web page, but a pop-up window.

On the pop-up window, there is a question recorded——

"Please give the form of motion of a spinning magnetic gyroscope at the fourteenth second when it passes through the magnetic field space of the instrument under the Gaclot formula."

Below the title, is a 30-second countdown.

Obviously, she must give the answer to this question within 30 seconds.

As the question popped up, her computer seemed to freeze, the mouse couldn't shake at all, and the shutdown button didn't work.

The only thing she can do is press the keyboard and enter the correct answer.

After confirming that there was no way to quit, Lin Xiaotang's eyes fell on this question.

This problem, which seems to be a physics problem, is actually a mathematical problem that requires a lot of calculations.

This may be a bit difficult for an ordinary person, but Lin Xiaotang can easily give the result by mental arithmetic.

What does this topic mean here?

Does she want to try it?

Lin Xiaotang looked at the pop-up window and hesitated.

However, before the countdown was about to end, she moved her fingers and entered the correct answer.

When she typed the last number, soon, another question appeared in front of her——

"Assuming that the Shirbo conjecture is true, the plane is arbitrarily subdivided into non-overlapping regions, with 0 and 1 as opposites, how many distributions will there be?"

It is also a 30-second countdown, which is also an essentially math problem.

This question is slightly more difficult than the previous question.

Intrigued by this reappearing topic, Lin Xiaotang put down the book in her hand and began to immerse herself in computational thinking.

After 3 seconds, she gave the final result.

As she typed the answer, the previous question disappeared and the next question appeared again.

"According to the expansion of the wooden tower, a spherical body is divided..."

In this way, as long as Lin Xiaotang finishes one question, the next question will appear.

At the same time, the difficulty of these questions is also increasing.

However, the countdown given in the pop-up window is always only 30 seconds.

In the face of such increasing difficulty, Lin Xiaotang's mentality, from the very beginning of interest, gradually turned into full concentration.

"It's still a little difficult..."

Lin Xiaotang itself is a program created by the main god of terror, a special life form built on numbers.

Therefore, she is far more sensitive to mathematics than ordinary humans.

But even so, when faced with these questions, she still felt difficult and difficult.

At the same time, Lin Xiaotang gradually realized that these questions should have been made by several programmers.

The previous topics are still reluctantly based on mathematics and calculations.

But later, the core of most of the questions revolves around programming and operations.

Her only doubt is, what are these programmers creating so many problems for?

Is it difficult, just want to test the newcomers who learn programming?

Lin Xiaotang didn't learn programming for a long time, so she didn't feel discouraged by such a difficult test.

On the contrary, the more difficult the existence, the easier it is to arouse her challenge.

Therefore, in the face of these difficulties, not only did she not back down, but she became more and more courageous.

At the same time, she was also deeply curious about the intentions of the few questioners.

But after she completed the 99th question, Lin Xiaotang already felt a little difficult.

Thirty, twenty-nine, twenty-eight... three, two, one.

It was almost in the last few seconds that Lin Xiaotang calculated the final result.

After entering those numbers, Lin Xiaotang sighed heavily and leaned on the chair behind him.