Deadlock during phone number change and if you can go to college again

Those days when I first arrived in Shanghai, I thought about it all day long... Paste it today

Deadlock caused by phone replacement

 

In the past few days, due to graduation, my classmates and friends all went to different parts of the country. Naturally, I had to change my phone number. Today I received another text message, and I suddenly thought, if two people a and B, A and B change their mobile phone numbers at the same time, wouldn't they be unable to notify each other? Deadlock, haha, deadlock... (Of course it is a bit inaccurate ). It seems a little interesting. Let me think about it more deeply:

First of all, two people change their numbers at the same time (this does not mean the same time, that is, one person has changed the number, and the other person has not notified the other party of the time, and the other person has also changed the number) this situation is rare, but it may happen like deadlocks in the computer. Since it is possible, how can this problem be solved? A common algorithm requires both parties A and B. Once a party wants to change the number, it must first notify the other party that it wants to change the number, and then change the number, the other party will wait until it receives a new number from the exchange, and it will not be able to change the number itself. However, in real life, this situation is generally rare. I just want to change it. If I change it, I can tell another one. I don't know if it will actually lose my contact information, however, in real life, the relationship between friends is generally a mesh, so when that happens, a third party will immediately get it again, then there is not only one contact method between friends, but also QQ, and so on. Therefore, based on the above two situations, serious consequences of making deadlocks-the inability to reach out to someone's current phenomenon is very difficult to happen in real life. So I have nothing to worry about. I should change it directly, haha...

 

 

 

If you can go to college again

 

If you can go to college again, it will take a lot of effort to improve your ability to use English, instead of simply taking a CET exam.

 

If you can go to another university, you must have a good understanding of history, including the history of China and the history of the world, especially the present and Modern History of Western society.

 

If you can go to college again, you must have a good understanding of micro-economics, at least what is the law of demand and what is marginal cost.

 

If you can go to another university, you must have a good understanding of philosophy and at least know who Kant is.

 

If you can go to college again, you will be familiar with music early. Fortunately, you will become a senior music enthusiast when you graduate.

 

If I can go to college again, I will never think that studying abroad is something that rich people can do...

 

I used to think that I could change some people and make them develop in what I think is a good direction, but I failed again and again, and even today I am still doing something like that, because I still feel lucky in my heart. If I don't think about it any day, maybe-I really have to grow up...