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Today, I grabbed a router, which took me an hour to get, and I was always in a “crowded” queue before. I couldn’t help but think of the ticketing system I made for Beautiful Encounter last year. Someone asked, why can’t I get a ticket with the script I wrote? The mystery will be revealed in this article.

The conditions that the ticketing system must meet are:

1. One person, one ticket, a person cannot get two tickets;
2. The tickets to be issued every day must be issued exactly, neither more nor less (assuming there are enough people to grab tickets);
3. The probability of successfully grabbing tickets with a program should not be significantly higher than the probability of manually grabbing tickets.