Problem Iterative Solution Things to do: 1. visit every node 2. copy all elements in neighbor Time Complexity O(N+M), where N is the number of nodes and M is the number of edges Space Complexity O(N) """ # Definition for a Node. class Node(object): def __init__(self, val = 0, neighbors = None): self.val = val self.neighbors = neighbors if neighbors is not None else [] """ class Solution(object):..
