After a while, the girl's condition gradually stabilized, Dong Que breathed a sigh of relief, and said: "Her wound has shown a trend of healing, as long as it is treated as soon as possible, she should not be able to die." Seeing that she is not very old, she is probably still a student, and I don't know how she could run to such a place by herself. ”

Zheng Xiaofeng thought of his past and said, "I hope it doesn't leave psychological trauma." ”

At this time, the girl's body seemed to move, and her face showed a weak and painful expression, and the three of them focused again, and found that her eyes were slightly open, and she seemed to be in a half-conscious state. Zheng Xiaofeng helped her up, fed her a small sip of water, and Cheng Ruxue hurriedly asked, "How are you?" Can you hear me? ”

The girl's head tilted slightly, looked at Cheng Ruxue, and after a long time, she barely squeezed out a few words: "I...... You ......"

I couldn't hear it clearly, it didn't seem to be a complete sentence at all, so Cheng Ruxue asked again: "What's your name?" Why is it here? ”

The girl suddenly coughed violently twice, and her emotions seemed to be very excited for a while, and it took a long time for her to say the three words intermittently: "Yan... Courtesy... Exceptional......"

Yan Lijia should be her name, but no matter how hard she tries, she can't say the next sentence. Cheng Ruxue had no choice but to say: "Okay, you don't have to talk yet, rest in peace, we will take you out safely." ”

Yan Lijia nodded, her lips moved, she should have wanted to say thank you, her eyes closed again, I don't know if she fell asleep again.

The three of them looked at each other, a little unsure of what to say next, Dong Que was the first to sigh and said, "Yes, we don't have a score in our hearts, and we have to make promises to others." ”

Cheng Ruxue said: "It's all come to this point, I believe there will be a way." ”

Zheng Xiaofeng reorganized his thoughts and said, "Now that the problem of where we are and where the exit is has been solved, knowing these still doesn't seem to be helpful in how to crack this mechanism." ”

Dong Quede said: "If we go directly below the exit room and then go up, will we be able to avoid being turned down again?" ”

Cheng Ruxue shook her head: "Then probably when we first arrive at the second floor, the entire second floor will rotate horizontally and send us to another location." ”

The brain was stuck again for a while, and half a minute later, Zheng Xiaofeng "hissed": "Do you think we can find any way to force this mechanism to turn before we go up, so that it can send us to the room next to the exit?" ”

Cheng Ruxue pursed her lips and said: "I don't rule out this possibility, now we have some known conditions that can be used, such as this is a Rubik's cube, and there are three directions that cannot be rotated, we might as well write down the possibilities of the next few routes and discuss them separately, maybe we can find any clues." ”

Zheng Xiaofeng and Dong Que both nodded in agreement, and the three of them took out a pen and paper again. The first thing in front of them is four different options: up, forward, left, and right.

If you choose to go up, there are four different branches, and they want to see what kind of situation is likely to be triggered by choosing each different branch.

However, they soon discovered that no matter what route they chose, they could not avoid the result of being spun down in the end, which was the hard and fast setting of the mechanism, and such a discussion seemed pointless. Cheng Ruxue was the first to give up: "I think we have to change our thinking." ”

Zheng Xiaofeng and Dong Que's brains were already blank, and they could only listen to Cheng Ruxue say it herself. Cheng Ruxue organized the language for a while, and said: "Since we can't find the idea in the order from the current position to the exit position, we might as well reverse the order and use the reverse deduction method, first assume that we have reached the exit position, and find the process with the result." ”

She actually meant that it was a bit like making an equation, although the equation uses positive thinking, but if you look at it from a causal point of view, it's actually more like a backward extrapolation, that is, if you already know the answer, then set the answer to X or Y, and then go back and build the process, and everything will be clear. Zheng Xiaofeng understood what Cheng Ruxue meant, so he tried to say: "If we can come to the room where the exit is located, it means that we must have arrived in the room next to it before this, but at this time, the room cannot be rotated, there are only two possibilities: the mechanism is stopped, or we are turned up." ”

Cheng Ruxue continued: "But the first possibility is that we have determined that it cannot be avoided, so it can only be the second one. ”

Dong Que scratched his head and said, "But the second one doesn't seem to be possible, for no reason, why should this agency help us?" ”

"Then we'll have to work backwards." Cheng Ruxue said, "From the perspective of the operation mechanism of this mechanism, this is a weight-sensitive mechanism, which means that only when the weight in the upper room changes, the mechanism will move." ”

Speaking of this, the three of them paused together, and inadvertently, the idea had actually come out.

I heard three people say almost unanimously: "We need to go our separate ways." ”

Indeed, if they are always gathered together, it will never be possible to avoid this endless loop, but if some people go up first, and others are waiting below, then it is very likely that the people below will be transferred up if the mechanism turns again.

But the faces of the three people did not show relaxation, Zheng Xiaofeng said: "But there are still two questions in this, first, what should those who go up first?" You can't just let some people stay here forever just because they can leave. Second, what if the mechanism rotates continuously, and the person who goes up later is turned away before he has time to climb back? ”

Cheng Ruxue thought for a while, and said: "The second problem we shouldn't have to think about, I think every time this mechanism rotates, there needs to be a pause in the middle, otherwise when we first arrived at the second layer before, the mechanism should have been activated." Even if this is not the case, since we can be in place in advance, time can be greatly saved, and even if there is a turn, it should be too late. ”

Dong Que said: "It means that this thing still has skill CDs." ”

Then there is only one problem left.

They definitely can't do such a thing as abandoning the car to protect the handsome, not to mention that everyone is equal, who can say who must be the car, who must be handsome, but the reverse push just now just proves a point, if you don't do this, no one of the four people can get out, which is obviously a dilemma.

"Are we going to think differently?" Cheng Ruxue had no choice but to say.

Zheng Xiaofeng hesitated for a moment, but shook his head: "It's really hard to think of other solutions." ”

The idea ran aground again, and the three of them could only remain silent, trying their best to dig deeper in this direction, and maybe this method could be improved again......

"Weight required...... But people can't be separated yet......" After a long time, Cheng Ruxue muttered, suddenly, her expression changed suddenly, she snapped her fingers with interest, and almost couldn't wait to say, "I thought of it, we can replace people with other dead things, such as the backpack on my body!" ”

When Zheng Xiaofeng and Dong Que heard this, they were taken aback at first, and said in their hearts, "Why didn't I think of it", but soon Zheng Xiaofeng realized a loophole again, and said: "But even if you use a backpack instead, someone has to send it up, so isn't it too late for this person?" ”

Cheng Ruxue didn't panic, and said: "It's okay, we don't have to succeed at one time, we put the backpack on the top layer of this side, and then everyone gathers at the bottom of the other side, that is, the backpack is placed on (3,2,1), and we go to (1,2,3), so that in fact, the two sides are equivalent to becoming a seesaw, because they all have the effect of weight, one side comes up, and the other side will go down, during which we just have to wait for the person who went to put the backpack to come back, and then leave together, and the safest thing is that When we go from (1,2,3) to (1,2,1), this position is exactly one of the three directions that we said earlier that cannot be rotated at will, which means that in the process, we don't have to worry about being turned somewhere else. ”

After saying these words, all the problems were finally solved, and under Cheng Ruxue's satisfied and relieved smile, the stones in Zheng Xiaofeng and Dong Quede's hearts finally fell to the ground completely.

Dong Que couldn't help but shake his head, and praised sincerely: "Cow batch! ”

Cheng Ruxue just smiled lightly and said: "If you think about it more, you should be able to come up with it, this is actually not too difficult method, mainly because the authorities are obsessed." ”

I don't know if she is being modest or what, but at least Dong Que thinks that it is absolutely impossible for him to come up with so many things.

Zheng Xiaofeng said: "Then without further ado, I'll go put the backpack, and let's act immediately." ”

Cheng Ruxue and Dong Que nodded and set the girl up, it looked like they could finally leave this ghost place.

However......

But……

But, but, but, but, but......

No one really thinks this is the end of the matter, does it?

Wouldn't it, wouldn't it?

Zheng Xiaofeng had just taken two steps when he suddenly felt a tightness in his chest, and his brain exploded with a "buzz". "Romance of the Three Kingdoms" said that in the Battle of Chibi, Zhou Yu had already set up a strategy to attack with fire, and thought that everything was ready, but he didn't expect that when he was about to kick the door, he found that he only owed Dongfeng, and he fell ill directly, and now Zheng Xiaofeng feels basically the same as Zhou Yu in his heart.

"Two ...... This notch...... It takes at least three people to climb up...... I'm gone, how do you get there? Even if you pass, how will I get back after I put my backpack away? ……”

"Ah, this ......" Dong Que and Cheng Ruxue said in unison, and everyone was stupid in an instant.