(Foreword)

The accumulation of each choice makes the hope in the distance even more diminishing.

(Text)

September 22, 2021 at 10:39 a.m.

Cui Li stood next to the sofa and never spoke again, it seemed that he still couldn't believe everything in front of him, obviously we came here to question Lin Yun, but what happened now was completely unexpected by us, making us the center of the contradiction.

Just as I was struggling to find a reasonable explanation, Li Ruina's walkie-talkie suddenly rang, and Xia Cheng's voice came: "I'm Xia Cheng, can anyone hear me?" His tone sounded a little flustered, and if you listened closely, you could hear some anxious panting.

"Can you hear what's going on?" Li Ruina asked into the walkie-talkie.

"Come on! You can't imagine what I'm seeing. When he said this, his tone was extremely excited, and his voice was raised by a few decibels, and his panting was louder.

"What's wrong? What's going on? What exactly do you see? As soon as Li Ruina finished asking, the signal on Xia Cheng's walkie-talkie suddenly cut off, and the sound of ticking kept coming.

"Summer City?! Summer City?! ......No matter how Li Ruina shouted, the signal on the walkie-talkie never recovered.

"We'll have to go and see, they might be in trouble." I said to Li Ruina.

"I think you're the biggest problem." Although Lin Yun said it very lightly, it was enough for us all to hear.

"Don't say so much, the most important thing now is to find Xia Cheng and Zhao Yuyu as soon as possible." Li Ruina didn't stay in the room for a moment, and immediately ran towards the position of the spiral staircase.

"Cui Li, let's go, I'll prove that we're not lying, trust me." I pulled Cui Li, who was still standing stupidly next to the sofa, and ran towards the stairs.

September 22, 2021 at 10:46 a.m.

Our group kept running fast and running, and finally arrived at the third floor where Xia Cheng and Zhao Yuyu were.

"Summer City! Zhao Hazy Rain! Can you hear me? We shouted as we walked, but there was no response.

The layout of the third floor resembles a huge indoor labyrinth. If you don't pay attention, you can lose your bearings. The walkways here are sometimes narrow and sometimes wide, with a turn left and a turn right. It didn't take long for us to get dazed.

"How can people find them, and even if they do, we can't get out." Lin Yun had already lost confidence before he could find it.

"Summer City! Zhao Hazy Rain! Where are you?" I still haven't given up hope at the last point.

"We have to think of a way, otherwise we won't be able to get out of this maze ourselves." Li Ruina said as she looked at the surrounding environment.

This floor is different from the previous two floors, with intricate walkways and no rules at all. We walked for a while, but it always felt like we were just standing still. All the walkways and surroundings are arranged in the same style, so that it is impossible to tell the specific directions. There is a feeling that even if the maker of this maze comes in, he may not be able to get out.

September 22, 2021 at 12:58 a.m.

We've been walking in this maze for more than an hour, but we still haven't been able to get out of this maze.

"Maybe we can write down our walking routes, so we can probably draw a rough map of the maze." Cui Li seems to have gradually recovered from what happened just now.

"It might be a good idea, but if you look at the layout of this maze, the specifications and the distribution of the walkways, the makers of this maze are so talented that even if we have a complete map of the maze, I'm afraid it's hard to get out." Li Ruina is right, the general maze actually walks a few more times, you can know the general direction, but the layout of this maze seems to be irregular, but in fact, the layout is very exquisite, the position of each aisle is very exquisite, so that people always unconsciously return to the original point.

I looked around carefully, there were no frills on the walls, the ceiling lights on the walkway were all at the same distance, and there was nothing special about the patchwork of each carpet. It would be too difficult to find a way through such a labyrinth, and Li Ruina was right, the designer of this labyrinth must be talented. But now is not the time to admire, we must find a way out of the maze as soon as possible, Xia Cheng and Zhao Yuyu are still waiting for us.

"You see, this maze is characterized by a lot of branches, and we will be faced with a choice after barely a few steps." Li Ruina drew something on the paper: "The route we just took, first turn left, then turn right, then go straight... From the point of view of mathematical permutations and combinations, the more choices we have, the more difficult it is for us to find the right path. ”

"So what do we do?" Cui Li watched Li Ruina keep drawing on the paper.

"You see, through the experience of the previous times, I found a key point, no matter what choice we make and how we go, in the end we will come back here, where we are now, and that sets the stage for my idea." Li Ruina turned the paper in her hand and continued to draw on it: "I roughly calculated the number of choices we have to face, and then through the formula of permutation and combination, and finally calculated our average walking time, so I have a simple and rough estimate, if I want to go through all the possible routes, it will probably take..."

"How much time?" Cui Li asked impatiently.

"Except for the time we have to rest, it will take at least ten days!" Li Ruina's expression was a little helpless.

"What! Twelve days! Cui Li seemed to be frightened by this number.

"Yes, at least twelve days, and even if we act separately, it will take at least three days!" Li Ruina handed me the paper.

"I can't figure it out, at least in terms of time, we don't have that much time to find answers." I returned the paper to Raina Lee.

"Look there's a switch here! Could it be the panic button! Cui Li pointed to a rotary switch on the wall.

"Seriously, I really don't want to hear the word panic button anymore." As I spoke, I turned the switch on the wall, and the light on the ceiling light suddenly dimmed a lot.

"I thought there was something special, it just looked like the switch on the top light." Lin Yun's face was slightly lost.

"Why did you put the switch on and off the ceiling light in the maze?" I muttered to myself alone. That's when I discovered a detail that we hadn't noticed before, a full-length mirror at each corner, and my brain was up and running again.

So that's it! I finally know how to get out of this labyrinth!

"I know how we got out of it." I said happily.

"Really! Do you know how to get out? Cui Li looked a little unconvinced.

"Of course! We can definitely get out of here!" I had a smile on my face that I hadn't seen in a long time.