text 第1周续：解释Vigen的3个代码

Posted 2021-05-02

I wrote 3 codes for Vigen problem. It's like a 3 step process. First is the simplist. After the function worked, I added on more in the 2nd code, and then add even more in the 3rd code.

It's like a version control process. 

Also a way to solve problem step by step.