Week 4 Recursion and A1

  This week I learned Recursion. I think this is very useful in the further programming.  I actually felt very interesting when I first time contact it at the monday lecture, because I think this is totally new way to think how to programming. It helps me to solve a lot of problems that I met before and I have no idea to solve it without recursion. However, it is not a easy thing to figure out a good and correct recursion function, because you must have a very strong logical thinking. But, It is hard to tell how exciting and satisfying is when you figure out, I think that is the interesting part about Computer Science. 

  However, the thing that really confused me is A1, It used a lot of class and recursion. Sometime i just don't understand what the handout let us to do. For example, I was so confused about step 5 in A1, I don't know what tour.py is for and why it is related to time. Anyways, I will try my best to finish A1. By the way, I very enjoy A1 and the everything that I learned from lecture.