There is still a lot to learn, games ruin life!
When it comes to time complexity, the first thing that comes to mind is the algorithm. Simply put, the algorithm is the way you solve the problem, and the number of statements you execute to solve the problem with this method is called the statement frequency or time frequency. is T(n).
https://www.cnblogs.com/huangbw/p/7398418.html
https://blog.csdn.net/itachi85/article/details/54882603