Following

This day is destined to be extraordinary.

Xu Mang followed Xiaoman to the game site, because there was still an hour and a half before the start of the game, Xu Mang, as the leading teacher, was sitting in the corner playing with his mobile phone, and Yang Xiaoman, who was suspected of being calm, was beside him.

“...”

"I said you bastard, can you care about other people?" Yang Xiaoman pouted and said with a displeased face: "I know that if you play Hearthstone, you can play Hearthstone, you can't win a game... What else can you do?"

“？？？”

"What can I do?" Xu Mang said helplessly: "How do you think it is easy to send a child?"

"Humph!"

"Tomorrow is the closing ceremony and the awards ceremony, you have to get in first, in case you can't get in again. Yang Xiaoman said: "In the past two days, I have seen that you have been very diligent in going to Qingda, and I estimate that you have met many people, there should be no problem, right?"

Yang Xiaoman knows Xu Mang very well, and she doesn't dare to say anything else, but this is the best in the world with the ability of others, although most of them are hated by others, but this can be regarded as being remembered by others, at least there is some subtle relationship between the two.

"Oh..."

"I've got it done. Xu Mang said absentmindedly: "I mentioned it to Deputy Director Zhou of the Department of Materials yesterday, and he should explain the situation to the school." ”

"How do you know the deputy director of the Department of Materials at Tsinghua University?" asked Yang Xiaoman curiously.

Xu Mang said indifferently: "Have you forgotten that I am the developer of the materials science database? All the teachers and students of the Department of Materials of Qingda use the things I developed, and I have lotus silk with them that cannot be cut. ”

Yang Xiaoman glanced at him, took out his mobile phone and began to scroll through Weibo.

soon

The game begins,

The fourth player in the team competition took the stage, and the game lasted for three hours.

Now Xu Mang doesn't pay attention to the so-called results at all, and now he only has how to win this game of Hearthstone, let alone ... There are so many player routines in these years that it's hard to guard against.

It's only seven fees,

Xu Mang was blown up by others.

"What a boring game!" Xu Mang sighed, silently put away his mobile phone, looked around the scene, and found a group of people not far away.

"Uh..."

"Xiao Man?" Xu Mang asked curiously, "Look over there, there are a lot of people around, is something going on?"

"Yes. ”

"What are they doing?" Xiao Man was also curious about this, and said, "Why don't we go and see?"

Words fall,

The two went to the scene of the incident.

When I got there, it turned out that a group of teachers and students who were engaged in mathematics were calculating the possibility of the password of the abandoned safe, a total of ten numbers from zero to nine, and the password was a combination of four numbers of these ten numbers, and each person only had one chance to try to open the lock.

Is this a boring teacher who temporarily remembered such a game, there happened to be an abandoned safe at the game site, and life is such a coincidence!

Not to mention,

It has attracted countless students and leading teachers.

This is a game of complete probability, because this lock has 10,000 probabilities to open, but it still does not stop these teachers and students who are good at mathematics from cracking it.

pity

Fifteen people tried, all of them failed, and there were still nine thousand nine hundred and eighty-five possibilities.

"Huh?"

"What should I do?" Yang Xiaoman secretly asked Xu Mang beside him: "Can this be calculated with a mathematical model?"

"Are you crazy?"

"Do you really think that mathematics is omnipotent?" Xu Mang said helplessly: "I'm thinking about using non-mathematical methods to crack it, do you see the worn buttons on the safe? I think the secret of cracking is in the four numbers two, seven, nine, and zero." ”

"Huh?"

"Is there any wear?" Yang Xiaoman looked at the four keys with a confused expression, and found no signs of wear, just... It's just a little bit lighter.

"Humph!"

"Do you think everyone is fake when they say that I have fiery eyes?" Xu Mang looked disdainful: "Of course... There are times when the fiery eyes fail. ”

Xu Mang didn't dare to say the second half of the sentence, he was afraid that Yang Xiaoman would explode on the spot.

Yang Xiaoman gave him a blank look.

Cut!

It's still a fiery eye, it's obviously a thief's eyebrows!

After this,

A dozen more challengers challenged, and all of them failed.

"There's only one chance to try, a little too little... Change it to three times!"

"Change it three times!"

"I also think it's interesting to change it three times. ”

Because of the unreasonable mechanism, it caused dissatisfaction among many people present, and these dissatisfied people were eliminated, so the game initiator did not change his mind, and the guidelines were still implemented.

Who knows

This has attracted too many players to join the game.

Probably in order to gamble, the initiator actually paid out of his own pocket, threatening that whoever could crack this abandoned password cabinet at one time would transfer a red envelope of five yuan on the spot.

Five bucks!

Many teachers who lead the group are impressed, as married men, five dollars is an astronomical amount!

"Alas!"

"It's so slamming the door!" Yang Xiaoman said with disdain: "Five yuan... Is it worth losing so many brain cells for five dollars?"

“...”

"Ask you!" Xu Mang said with a serious face: "In the future, when the two of us get married, who will take care of the family's money?"

"Nonsense!"

"Of course it's my mother!" Yang Xiaoman glared at Xu Mang, and said viciously: "What's the matter?"

"Then how much pocket money do you give me a month?" asked Xu Mang.

"Five yuan!" Yang Xiaoman didn't think about it, and immediately gave a number.

“...”

"Look... Five yuan, this is a month's living expenses for the teachers!" Xu Mang sighed and said with a sad face: "Do you think they can not be excited?"

Yang Xiaoman: (′▽'〃)

It seems to be the case.

"Huh?"

"You're a little better than them. Yang Xiaoman said embarrassedly: "I'll give you an extra five cents a month." ”

Alas...

It's so angry!

How did such a handsome young guy fall into Xiao Man's hands?

Xu Mang sighed and put his mind back on the game of cracking the code, two, seven, nine, zero... What exactly is the difference between these four numbers?

At this point,

Xu Mang thought of an extracurricular miscellaneous book "Behavioral Psychology" that he had read because he was bored in high school in the past, not to mention that the reason why Xu Mang's leek cutting skills are so good is really inseparable from the credit of this book "Behavioral Psychology".

Although he has no psychological skills, but the memories of the past still exist, Xu Mang decided to explore from the perspective of the password enterer, from the behavioral psychological aspect, to solve the problem of the password step by step.

First of all

If you're using a safe, when you enter your password... The first number should be kept to the maximum contact surface with the fingers.

Since the contact surface with the fingers is kept to the maximum, there is only one result in the end, which of the math keys on it is the most worn, and which one is the lightest?

Zero!

Zero wear and tear of the keys is the worst!

Now there are two, seven, nine, three numbers left.

Keep thinking...

The first password is zero, and its finger is at the bottom of the PINpad, and the way the finger moves will be the key to the second password.

Seven

The upper left side is a little dim.

Nine

It's a little dull up there.

Two

It is impossible to judge for the time being.

At this time, Xu Mang's brows were tightly locked, according to the behavior logic of the person who entered the password, as well as the wear and tear characteristics of the password button, the second password should be seven.

The upper left side of the key seven is worn badly, and the force point of the fingers is on the upper left, so it is speculated that the fingers move from the right to the upper left, otherwise it is impossible to press such a force wear characteristic, and the layout of zero and seven is in line with their own speculation.

At this point, the second password is seven!

Nine...

The force wear characteristics are on the top, so only the movement trajectory from top to bottom is likely to cause such a situation, so it is speculated that the third password is two, and only when the finger presses two, it can move from top to bottom to nine.

So

The password is 0729.

"Huh?"

"Have you thought of a password?" Yang Xiaoman suddenly smiled and asked, "Are you stumped? In the face of this clueless situation, do you feel that you can't use the knowledge you have learned?"

"That's it!"

"If you can crack this password cabinet at once today, get the teacher's five-yuan red envelope, and get married in the future, you will be in charge of the family's money!" Yang Xiaoman said: "But if the challenge is unsuccessful, then I'm sorry... You don't even have a little coffer. ”

Xu Mang sighed,

Xiao Manna Xiao Man,

Why are you so young and cute?

"How?"

"Don't dare to accept the challenge?" Yang Xiaoman saw that Xu Mang was silent, and suddenly became interested, and immediately decided to give Xu Mang a little more discount.

"Alas!"

"I'll give you more effort, and when we get married, you'll have two days a week and you can play games all night. Yang Xiaoman smiled and said, "How about it? This condition is very attractive to you, right?"

Hiss!

Oh, my God!

Is this an open-mindedness?

Xu Mang was taken aback, and he decided to give a lesson to Xiao Man, who was cute and ignorant.

"Xiao Man..."

"Do you know why my grades in my freshman and sophomore years of high school were so poor?" asked Xu Mang seriously.

"Huh?"

"Uh... Maybe it's lazy, right?" Yang Xiaoman said: "It may also be really stupid." ”

Xu Mang: @#¥%......

"I'll be honest with you, I read a book called Behavioral Psychology when I was in high school, and it changed my life a lot. Xu Mang said with a grin: "Most of the theories of cutting leeks are based on this book. ”

Yang Xiaoman looked confused and asked curiously: "Is there any direct relationship between "Behavioral Psychology" and you want to crack the code?"

"I have just simulated the order in which the password is pressed based on the wear characteristics of the password buttons. Xu Mang said indifferently: "Didn't I say that the password buttons were a little weird, two, seven, nine, zero, the four password buttons were seriously worn, and the password was the order of these four numbers." ”

"But it's useless to know, because there is only one chance, and I don't believe in probability, so I speculate according to the characteristics of force wear. Xu Mang said: "Zero is the most worn of the four keys, and the first password is zero." ”

"There is wear on the upper left side of seven, which is caused by the fingers moving from right to left, so the second password seven, the wear and tear of password nine on the top, there is only one possibility, the fingers are moved from top to bottom, so the third password is two. ”

"The final password, 0729!" Xu Mang showed an extremely unbeaten smile: "My name is Xu Mang, and I am a master of behavioral psychology!"

Words fall,

Under Yang Xiaoman's frightened expression, Xu Mang walked to the center of the crowd, squatted down, and silently pressed 0729, the password order.

Suddenly,

I heard a 'click' sound.

So far

The discarded locker that had plagued everyone present for a whole hour was ruthlessly opened.

......