优化

1 list，dict，set的时间复杂度

x in s

list：O(n)

dict：O(1)

set：O(1)

2.字符串格式化速度对比

f-string 》 + 》% 》format

参考

https://blog.csdn.net/jmh1996/article/details/78481365

https://www.cnblogs.com/tintinsoft/articles/9743765.html

https://blog.csdn.net/weixin_48629601/article/details/107532754

https://blog.csdn.net/ACBattle/article/details/97012800