bfs
class Solution:
def levelOrder(self, root: 'Node') -> List[List[int]]:
q,ans=[root],[]
while q and q[0]:
ans.append([node.val for node in q])
q=[child for node in q for child in node.children if child]
return ans
bfs
class Solution:
def levelOrder(self, root: 'Node') -> List[List[int]]:
q,ans=[root],[]
while q and q[0]:
ans.append([node.val for node in q])
q=[child for node in q for child in node.children if child]
return ans