leetcode之N-ary Tree Level Order Traversal(429)
題目:
給定一個N叉樹,返回其節點值的層序遍歷。 (即從左到右,逐層遍歷)。
例如,給定一個 3叉樹
:
返回其層序遍歷:
[ [1], [3,2,4], [5,6] ]
說明:
- 樹的深度不會超過
1000
。 - 樹的節點總數不會超過
5000
。
python程式碼:
""" # Definition for a Node. class Node(object): def __init__(self, val, children): self.val = val self.children = children """ class Solution(object): def levelOrder(self, root): res,q = [],[root] while any(q): res.append([node.val for node in q]) q = [child for node in q for child in node.children if child ] return res
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