1 <= cityAi.length, cityBi.length <= 10 cityAi!=cityBi All strings consist of lowercase and uppercase English letters and the space character. 解题思路:很简单的题目,找出唯一一个没有作为起点的城市即可。 代码如下: classSolution(object):defdestCity(self, paths):""":type paths: List[List[...