As soon as Lu Sanlang came back, he drove Zhang Chen away. He was very happy at first, but when he found that he had solved the first seven words, but the last seven words were all wrong after trying all the verses, and they did not match the sixty-four sets of numbers provided by Zhang Shouhou at all, he was immediately furious and understood why Zhang Chen left so happily.
It seems that this guy ran away when he found out that the situation was hopeless!
He still didn't give up, and checked the calculation results of several people one by one. But when he was checking the calculation, he heard Qi Liang whispered that the young master was here. At this moment, his back stiffened slightly, and the ambition he had just rushed back turned into a feeling of bitterness. He turned back carefully and saw Zhang Shou had already started to take the verification manuscript from others to check it, so he hurried over.
"Teacher, maybe it's because Weinan Bo and his men didn't collect all of them, or maybe they didn't give them all to us. I might as well go to the Arms Bureau again!"
Seeing Zhang Shou waving his hands, Lu Sanlang didn't know whether Zhang Shou was unwilling, or had other ideas, or... Zhang Chen, the shameless one, was trying to sow discord between them. He made up his mind and said humbly: "There are only seven rings left anyway, so why not ask Weinan Bo to bring the box over, and we can try them one by one, it shouldn't be too complicated..."
"The seven-ring text lock has 16,384 possible combinations. Furthermore, the first seven characters may have passed the verification, but there is no guarantee that they are correct. In other words, you may still fail after trying 16,384 times. In this case, there is no need to try anymore."
At this point, Zhang Shou glanced at Lu Sanlang and saw that he looked frustrated. Many of the students in the four seats were also clearly discouraged. He smiled and said, "You have all done a great job. In just half a day, you have solved half of a problem that others have not solved for decades. Why are you so sad? As for the other half, I have no idea. That is not my fault."
He flicked the manuscript lightly, and thoughts raced through his mind. The phrase "Xuan Fu is still afraid of the young" happened to match the words on the first seven rings after it was shifted. It should not be a coincidence, and the idea should be correct.
According to the previous practice, the function should be increased to cubic or even quartic, but in this case, the number of four-digit combinations that the cubic function needs to try and error is not 64, but 256. The number of five-digit combinations that the quartic function needs to verify will reach 1024, which is a long-term repetitive work and completely meaningless.
Since he came into contact with ciphertext in these years, he had never seen an encryption method as complicated as that.
So, there is no need to think too complicatedly, why not think about it from a simpler perspective...
Zhang Shou looked at the papers in his hand, tapping his fingers unconsciously on the table, his mind working rapidly. He always believed in a principle that when the mind is operating at the highest speed, if it is a computer, it will freeze, but if it is a human brain, then a very wonderful phenomenon will occur, commonly known as a flash of inspiration.
As he was thinking about it, he suddenly had a very bold idea, and the corners of his mouth curled up slightly.
In the east warm room of the Qianqing Palace, when the emperor received the report from the third and fourth princes, he couldn't help laughing. He was not like these two young sons, who thought everything was so naive and simple.