費氏數列
這次有四支影片 (留言區會再整理一下)
github:
https://github.com/…/python-notes/tree/master/fibonacci_num…
Can a Fibonacci function be written to execute in O(1) time?
https://stackoverflow.com/questions/6037472/can-a-fibonacci-function-be-written-to-execute-in-o1-time
