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The dark shadows in the sky were intertwined into a huge vertical and horizontal net. At the moment Lin Xun approached the glass door, at least eight of them had approached Lin Xun's body. Lin Xun's ears were full of the whistling wind, and the sound of sharp objects breaking through the air—the monster's claws had a hard sharpness that did not conform to the laws of biology.
The sword qi staggered and shot out in all directions with Lin Xun as the center, resisting for a while.
Blocking it for a while, but not forever, the consumption of sword qi is limited, which is directly related to Lin Xun's physical condition.
He didn't even want to block the permanent, the long sword's tip slammed straight into the glass door, and the huge shock force came, his wrist was numb, and the hilt almost dropped. And the glass door made of explosion-proof material is really solid. His single blow from the Golden Core Realm only broke a cobweb-shaped crack. And the short white shadow inside the door is slowly walking towards you.
But at this time, his wrists were already weak and trembling due to the loss of strength, and they were abnormally red.
Lin Xun looked at the white shadow, thinking that he had the stunt of disconnecting the Internet, no matter what level of monster this girl was, she would not go to heaven. Thinking like this, he sighed and kicked the steel explosion-proof door that was already covered with dense spider web cracks!
With a bang, the broken glass fell one after another, and Lin Xun also felt an indescribable pain in the knee joint, which was similar to the feeling of dislocation, but he could still walk.
Inside, Bai Ying's face was clearly presented, with a white skirt and two braids on both sides. The familiar facial features were undoubtedly the girl Lin Kexin met in the hospital. But what was different from that time was that her eyes were all covered in black, and the whites of her eyes disappeared. She walked out of the deep subway tunnel space like a lifeless puppet doll, the kind of ghostly.
Obviously, she was controlled by monsters, and when Lin Xun left the Children's Hospital, she was still like a normal girl - who is in her body, that "invisible friend"? So, this invisible friend is the initiator of this trap? After Lin Kexin said the subway line 4, he tried every means to mislead everyone into the basement of the small building. Or, Lin Kexin and her friend came to collude, and they set up this trap together.
The purpose of this trap is undoubtedly to wipe out the world of self-cultivation, and then take Lin Xun with him, or... simply Lin Xun.
Lin Xun's mind didn't stop for a moment, and the sword qi around him didn't stop. He knew that he would fight for a while, and he couldn't be taken to the subway tracks. He was a mortal body, and it was better to face thousands of people outside. monster. So, Lin Xun fought and retreated, taking a dozen steps back.
Lin Kexin also slowly walked out of the hole in the subway tunnel. She looked directly at Lin Xun, and the movements of the surrounding monsters slowly stopped.
Lin Xun also looked at her.
He opened his mouth and asked, "What are you going to do?"
Lin Kexin still stared straight at him, then tilted her head, as if thinking about something.
Then, at a moment in the next second, her body rose into the air and slammed towards Lin Xun in a strange posture! She stretched out her right hand, her slender fingers hooked into claws, and grabbed it towards Lin Xun's Tianling Gai!
Even though he was still a few meters away, the familiar stinging pain reappeared in his mind, just like the day when the system was damaged, he immediately knew that the monsters would not negotiate with him, let alone shake hands to make peace. Their purpose was to get rid of him. get something from him, or put him to death.
At the same time, other monsters around him also flew up, and the black shadows covered the sky. It was unimaginable from any point of view to deal with these thousands of enemies with one person's power.
His power is limited. Indeed, as long as he wants to, he can wield any amount of sword qi, and he can also wield any strength of sword qi, but the two cannot be done at the same time. To increase the number of sword qi, the number must be sacrificed, and these While the muscles are strong, there are also a huge number of monsters - especially one of them, Lin Kexin, who does not know his strength.
This is not the man's arm acting as a car, but a small branch floating on the water, trying to block the flood of the Yellow River that is about to wash down upstream.
But Lin Xun didn't panic.
The light of the sword in his hand changed and changed back to the posture of the keyboard.
In the two or three seconds of life and death, he called up a program, and at the speed of a programmer's hand, he clicked with five fingers and modified two parameters.
Some problems, which are unimaginable for humans, are not so for computers. In the abstract sense, all concepts are mathematics.
Every monster has a position, in three-dimensional space, abstracted as a point.
The sword in Lin Xun's hand is also a point.
A line can be connected between points, which is the path of the movement of monsters and sword energy, a mathematical concept, road.
Then the whole scene is a picture.
In applied mathematics, there is a field called graph theory, and there is a class of problems called combinatorial optimization problems. The laying of urban underground waterways, the planning of traffic routes, the cash flow in financial networks... are all where it comes in.
How can Lin Xun use the fastest speed to block all the monsters that threaten his life, and fight Lin Kexin head-on
And while attacking the monster, how to ensure that the strength of the sword qi is the maximum within the range that he can do
The first problem is called the shortest path problem.
The second problem is called the maximum flow problem.
There are also many forming algorithms to solve these two problems, Dijkstra, rim, SA, HL...
— This is mathematics, and the application of mathematics.
With the wind whistling, Lin Xun pressed the run button as usual.
Sometimes, facing monsters is like facing a final exam. His heartbeat was steady, because he was not an ignorant person.