Chapter 23 Greetings from Mitarai: Digital Lock Chapter 10

【Greetings from Mitarai: Digital Lock】 Since then, Mitarai has always been listless, and the truck that caused us to move couldn't leave Tsunashima until December 30th. I don't know if Officer Zhuyue had guessed it, and he came here to help on the morning of December 31st.After all, if she doesn't move out within the 31st, Mitarai may be sued by the landlord. Police officer Takegoshi reported that Makoto Miyata has been tried and will eventually be sent to a juvenile correctional facility.Although Mitarai looked shocked, but taking advantage of Mr. Police Officer being there, he finally opened his mouth to explain.We sat on packed cardboard boxes and stacks of books, listening to my friend explain.

"How did you solve this case?" Faced with my question, Mitarai finally sat down on the luggage and replied: "Inferences cannot be explained as clearly as mathematical formulas. Maybe it is a bit like the combat plan of baseball coaching. We must go all the way to the possible Exploring the direction of sexuality. "This case is also the same. Ishihara and Bachang are both absolutely suspicious, but what these two people reduce the possibility of committing crimes is the remaining 470,000 yuan in Suita Hisuro's wallet." "The main part of the motivation of these two people is money, and they should be concerned about the 470,000 in their wallets and take the opportunity to steal it.

"There are other reasons for these two people to fall outside the range of suspects, part of which is related to Beichuan. If Beichuan did it, wouldn't it be too easy to be suspected according to the circumstances of the case? He himself would not have thought of this. Therefore, I Turn around and shift the target of suspicion to someone in the 'safe zone'. "In this way, there are a few people who undoubtedly fall into the 'safe zone' - the commuter group who goes to work by truck. There are four people in total, but there can only be three people in the truck seat - then the remaining one must sit in the truck. On the carriage? So this person is the most suspicious.

"Ome Street in the morning is a famous 'traffic jam avenue', but there are subways running under the road. From Ogaki to Yotsuya, these two days the road runs parallel like twins. In this way, sitting in the rear compartment It can be done by jumping off the truck and taking the subway between the scene and the truck while the truck is standing still-I saw this trick at the time. "But there is a difficulty here, needless to say, the 'digital lock'. Only the victim knows the password of the digital lock, and the password must be cracked within a short time between the two places." So I considered this combination lock, but A blind spot was discovered by accident. "

We leaned out and listened carefully. "The total number of combinations of three-digit numbers from 0 to 9 is surprisingly small—the total number is only 10×10×10, a total of 1,000. I was also a little surprised. I thought I was wrong, and I thought about it several times. . But that's the only way it could be. "Let me explain in detail: For example, starting from 111, if you try all the combinations one by one, it will be 111, 112, 113... In this way, until 110, there are only 10 combinations in total, right? So 11X, there are a total of ten items. "Considering 12X next, there are also 121, 122, 123, 124... until 120, which is also ten items.

"Thinking of it this way, 13X and 14X also have ten items, and ten ten items make a total of one hundred items—that is, 1XX has a total of 10×10 equal to 100 combinations. Right? "Then consider the combination of 2XX, starting from 21X, of course there are also one hundred items - 2XX is the same as 1XX. "In this way, counting 3XX and 4XX, there are 10 possibilities in the hundreds, a total of 1,000 kinds-these are all combinations, and there are no other possibilities. "If you think about it this way, it will lead to incredible conclusions. If you try the combination of numbers one by one, it will take about two seconds for each one, and maybe it will be faster. Even if it is two seconds, it only takes 2000 seconds to try them all. .2000 seconds divided by 60 is 33, that is to say, it only takes 33 minutes to try it from beginning to end. Such a digital lock is just a psychological trick.

"Besides, you don't have to try from 111, right? That's too stupid. Considering the psychology of the setter, the possibility of setting the password to 7XX and 8XX is very high. In this way, try from 9XX to 0XX in reverse, about ten minutes It is possible to open. "Of course, the reality is not all as expected in theory. It always takes some time to adjust the position, and the digital dial may not rotate so smoothly, but there are always good ways to use it. For example, when testing 99X, use tape or something to put the first two Fix the first digital dial, and then pull the lock while turning the remaining dial, so that when it hits the password, it can be opened at once."

"So that's it." I couldn't help but say, "The digital lock can be opened so easily!" "It's just a display toy. It's just that if you have to try it from beginning to end, the thief will give up halfway. But in the end, this kind of lock can't prevent unusual events." "But didn't you say it would take eighty-four days to try it all? Why are you lying?" Mitarai waved his right palm and replied: "There is no way, after all, as I said just now, Officer Takekoshi wanted to arrest Ishihara and Baba immediately, but they are not criminals.

"Since Officer Takegoshi entrusted me, I also have a little self-esteem. With this little self-esteem, I can't let you catch the wrong person and lose face. So I made up such a lie to delay time-I interpreted the digital lock as a ratio It's a much stronger wall of iron in itself." "Why? Couldn't it be clear from the beginning?" "I don't want that. The reason is that the murderer didn't touch the money in the wallet. It can be seen from this that this is a crime committed for conviction. In this case, there is a brake on my own fame, I think Be cautious. Maybe there is also God's will in it.

"In short, after I made this reasoning, I wanted to meet the man who sat on the cargo box when we set off from Ogaki, and see what kind of person he was. I first suspected the oldest Akita, because This kind of thinking is not something that people who are too young can have. "Unexpectedly, after asking, I found out that the youngest boy, Makoto Miyata, was sitting in the back of the car—from this I knew the culprit was him. "I made friends with the prisoner for a while, to confirm my reasoning. Unfortunately, I found that he was a very good boy--this is a great lesson! Don't get too close to the prisoner in the future.

"In the end, the magical power of the digital lock was exhausted after all, and police officer Takegoshi planned to arrest Ishihara. I hesitated for a long time, and finally felt that a crime is a crime after all. "However, to such an introverted and simple boy, I can't say such cruel words as 'you are a murderer'. He is now in the most important period of his life, and if he is hurt at that period, he will feel like a solidified plaster , I will never forget it all my life. He has already carried a big scar, is it possible to chase after him and let him suffer another injury? That is nonsense, and I don't want to play that kind of role. " At this time, Mitarai seemed to be thwarted, and continued powerlessly: "So I thought of a way to deliberately let the police officer Takekoshi pretend to arrest Beichuan. I had already seen the motive of this case, so I postponed it. It is impossible to be indifferent to hearing such words. This plan really succeeded, but there is nothing to be proud of—I deceived that boy, and in the end I didn’t have the courage to tell him my lie.” Mitarai was silent for a moment, and we were also silent for a long time, waiting for his action.Mitarai clapped his hands, stood up and said, "Okay, that's all. Let's move things later." Thanks to the help of Officer Takegoshi, everything was loaded onto the truck just after noon.I was driving towards Yokohama. Police officer Takekoshi said that I still had work, so I went to the police station first. "In the old saying, it's true that the end of the year is called 'teacher'!" I said to Mitarai, the driver's passenger seat, "Look, you are called 'teacher', sitting in the truck and busy Let's run!" Mitarai didn't take my bad jokes. Our new house is an old five-story building on the side of the carriageway.The job of unloading the luggage and moving it up to the fifth floor was left to the two of us. After moving upstairs, it was also a lot of work to arrange things around the room.Mitarai and I—especially Mitarai—were nothing more than a few books as property. I didn’t expect that when we moved in, there would be quite a lot of inexplicable furniture.I saw Mitarai dig some coffee beans off the shelf and throw them straight into the trash. Until late at night, we finally packed up.The clock on the wall was striking midnight just as I was putting the last book on the shelf. The bell sounded like a signal, and as soon as it rang, there was the sound of crackling firecrackers in Chinatown in the distance——