It was as if several people were swinging their swords at the same time, and the cold sword light was divided into several paths, blooming like a lotus flower in Qianzhou's hands.

With the sparkle of the sword, the skyscraper mountain fell from the sky. Although it has not yet landed, the shadow cast is enough to make people despair, as if they have been choked by the throat.

Qianzhou's sword was so heavy, but so fast, that several [floating surfaces] were split in two before they could react, and their faces that resembled human faces still maintained a hideous and terrifying expression.

Lift the light as if it were heavy, and turn the simple into the complex.

Jiang Qinghan's eyes showed a hint of surprise, and he made such an evaluation in his heart.

Several [floating surfaces] that were split in two burst like balloons, and disappeared in a "snort" sound that resembled air leaks.

After making sure that there were no fish that slipped through the net, Qianzhou retreated. This one-sided massacre was really not difficult, and even the warm-up was a bit reluctant.

"What do we do next?" asked the retreating Qianzhou.

"Make a mark in place and explore this place a little bit. Jiang Qinghan calmly made a decision.

Qianzhou nodded, and drew a "ten" on the wall with the fragment, and at the same time pasted a piece of crystal on it.

The group walked towards the depths of the grotto, and soon encountered a fork in the road.

Marking the fork in the road as usual, several people turned into one of the passages.

But after walking only a few dozen meters away, a new fork in the road appeared.

As before, it's still a sign to move forward.

In just a few hundred meters, several people have already encountered several forks. Many of the passages in these forks were not horizontal, and several people followed the terrain up and down for a while, and then strayed into a huge ant nest. Soon it was impossible to tell where he was.

In front of a new fork. The crowd stopped.

"It's like a labyrinth-like structure. Jiang Qinghan frowned and said.

"Maybe you can try the 'right-hand rule'?" Pei Xing suggested.

The right-hand rule is a theorem applied to a two-dimensional maze that does not change. Specifically, "Hold on to a wall with your right or left hand and walk along it." No matter how complex the maze is, the worst outcome of this approach is finding an exit after traversing the entire maze. ”

This method is based on an immutable two-dimensional maze whose topology is always two disjoint lines. That is, the walls that make up the outline of the labyrinth have only two sides throughout. So as long as you follow one of the walls, you will inevitably reach the other end of the line, which is the end.

But—

"However, there is a premise for the right-hand rule. Qianzhou said, "There are several sections of the road we have just walked that have obvious slopes. In other words, there is a three-dimensional structure in this labyrinth. ”

In fact, even a three-dimensional structure can be represented by lines on a two-dimensional plane. But this three-dimensional structure is most likely layered.

In this way, when it is made two-dimensional, the result is a structure that resembles a nest of multiple concentric circles. It doesn't matter if the concentric circles here are replaced with triangles, squares, or other strange shapes. The point is that such a two-dimensional figure is layered, and several layers can be layered from the inside out.

The "right-hand rule" can only traverse one of the layers, and as long as the entrance and exit are not on the same level, it will lose its effect.

"Isn't there any other way?" this kind of mathematical problem was naturally thrown to Qianzhou.

"Of course, there are ways, and there are even many of them. Qianzhou pursed his lips, "It's just ......"

As a classic problem in mathematics, the maze problem has received the attention of many mathematicians since ancient times. How to find the optimal solution in a maze has become a long-standing topic among mathematicians.

On this basis, many interesting and ingenious algorithms have been proposed. But the core idea of these algorithms is the same: to traverse the entire maze to find the exit with as little or no repetitive route as possible.

In other words, the worst outcome of these methods is to go through the entire maze to find the exit.

If the maze is extremely complex and extensive, the time spent can be quite exaggerated.

"Is there no other way?" Hearing Qianzhou's explanation, the faces of several people were also a little ugly.

"Maybe you can try brute-force hacking?" Qianzhou suggested with a tilt of his head.

Qianzhou is not kidding. Although when he used to read novels, anime, or play games, he admired skill-stream characters.

In his view, the so-called "art is an explosion", "equivalence is justice", "caliber is truth" and so on are completely heretical.

But when it was really his turn, Qianzhou said: It's really fragrant! You can't experience the thrill of crushing the enemy with essentia.

When quantitative change can lead to qualitative change, the so-called skill is not so important.

These stone walls have been observed, and they are not of special material. As long as Qianzhou is willing to spend essentia, it is not a big problem to break them through. The only thing to consider is probably the stability of the grotto and whether it will attract some strange things.

The former can be avoided by skill, and the latter is a case where Qianzhou wishes that something would come over. Otherwise, there is too little useful information for simply walking the maze.

"Do you really think so?" Hearing Qianzhou's unreliable proposal, Jiang Qinghan couldn't help twitching the corners of his mouth.

"It doesn't take more time than walking through this labyrinth, right?" asked Chishu rhetorically.

"Having said that, but ...... Never mind. You're right, there's really no other way to do it right now. Jiang Qinghan sighed distressedly, "Pay attention to safety, after all, there is a depth of [three] here." ”

Qianzhou nodded in understanding.

The main force in this matter is only Qianzhou, on the one hand, he is the one who made the proposal, and on the other hand, he is the only one who can withstand such an exaggerated essentia consumption.

Walking to the stone wall, Qianshu noticed a strange thing. Although there are often irregular ridges on the stone walls and ground, these ridges are just scary to look at, and the head is blunt. In general, no harm is caused.

Without paying much attention to it, Qianzhou took a deep breath and held the fragment in front of him.

The essentia that had been silent in the body suddenly awakened, rushing mightily in the body of the thousand boats, and the sound of the rising and falling tides could be faintly heard.

It's like the tide leaping over the dikes, rushing over the fields, overflowing the roads, submerging the rolling hills, and then rushing farther afield. During this time, the tides rub against each other, squeezing each other, creating wave after wave out of thin air, rolling up whirlpool after whirlpool, completely oblivious to the damage that can be done along the way.

- It's not a pleasant thing to do.

For Qianzhou, because the amount of essentia is so huge, every time essentia flows through his body, it brings him a strong sense of discomfort - like ants crawling under his skin, or heavy mercury stasis in his blood vessels, or needles and threads stitching between his muscles.

But Qianzhou was happy about it—because it was a clear reminder to him, a reminder that he was still alive. Live in such an absurd and fantastical world.

With the input of essentia, the edge of the fragment became more and more dazzling. Occasionally, a little light flashed from the sword, and then you could see the dense words or symbols carved on the rough body of the sword.

That is the only testimony left by the past, and even Faust's death was just an extra stroke on the sword.

Yes, all things perish, just as all things are reborn.

Qianzhou twisted his wrist and inserted the fragment into the wall.

It's like gently inserting tofu with chopsticks, and there is not even a sound at all in the process.

Out of sight, the essentia of the Thousand Boats is transmitted in all directions through the fragments. Clusters of pale silver crystals grew inside the stone walls, like stranded roots.

Sharp sword rays shot out of the crystal, slicing the stone wall inch by inch. Then the crystal seemed to have been replenished with nutrients and began to grow stronger.

The hard rock became pale and crunchy, as if it had been weathered over hundreds of years.

The raging and violent essentia was extremely tamed under Qianzhou's hands, but he never took half a step out of the thunder pool when he smashed the rocks as much as he could.

After only a few breaths, Jiang Qinghan and the others just felt the active matter bloom in the stone wall like fireworks, and then quickly dissipated.

Qianshu pulled the fragment out of the stone wall.

As if pushing a domino, dense cracks continued to emerge on the stone wall, and then shattered. A large amount of rubble flowed out of the stone wall, kicking up a puff of dust and revealing a small passage.

The passage brutally pierced through the wall, forcibly connecting the two otherwise disconnected passages.

"That's an exaggeration. Pei Xing couldn't help but smack his lips. For now, this whimsical approach seems to work.

"It's called, 'I don't come to the mountain, but the mountain comes to me.'" Qianzhou smiled.

"Now that the wall is open, hurry up and don't waste time. Jiang Qinghan urged.

Several people walked over with their heads bowed in turn.

These walls are not open randomly. Before opening, everyone will make a simple calculation according to the depth measured by the [depth meter] to determine the direction of the depth. After there is no road in this direction, Qianzhou will be asked to open the wall.

After doing this a few times along the way, the depth of the crowd was steadily decreasing.

"Gragra. ”

Because the rock was cut very thinly by the thousand boats, it did not make a loud noise when it fell, but it was like a bag of marbles falling to the ground.

"Qianzhou, can you still hold on?" Jiang Qinghan asked with some concern.

Along the way, Qianzhou has broken through more than ten walls. The thickness of these walls is tens of meters, and the thinnest is more than 10 meters. The essentia spent is a rather scary number.

It's not impossible for the other three to break the wall, but they don't think about it in this way because of the loss of efficiency and essentia.

"It's ok, it's not a lot of consumption. Qianzhou sensed the remaining essentia in his body and said.

And so it is. After Qianzhou became a transcendent, his essentia was not used up except for projecting a history about Crimson.

"If only you think you're okay. Seeing this, Jiang Qinghan didn't say anything.

Essentia is not as good as mana in the game, and Sky Blue has no other effect except that it can't put skills. Essentia originates from the soul and will of the transcendental, and excessive squeezing of essentia will cause a certain degree of damage to the soul and brain of the transcendent.

"So what's the depth now?" asked Qianzhou.

“4.7。 Pei Xing spoke, "It's already a rather dangerous depth, be careful." ”

As if in response to his words, a strange voice suddenly came from the corridor.