0:00 題目說明
4:07 思路說明
16:46 程式說明以及複雜度分析
Problem:https://leetcode.com/problems/alien-dictionary/
C: the total length of all the words in the input list, added together.
Time complexity : O(C)
Space complexity : O(1)
Code:https://github.com/kobukuro/leetcode/blob/master/Graph/269.%20Alien%20Dictionary.py