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# Definition for a binary tree node. # class TreeNode: # def __init__(self, x): # self.val = x # self.left = None # self.right = None #先是比较树根左右边的是否相等。 阅读全文
posted @ 2020-04-24 23:35
topass123
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class Solution: def levelOrder(self, root: TreeNode) -> List[List[int]]: if not root: return [] res, queue = [], collections.deque() queue.append(root 阅读全文
posted @ 2020-04-24 12:51
topass123
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# Definition for a binary tree node. # class TreeNode: # def __init__(self, x): # self.val = x # self.left = None # self.right = None class Solution: 阅读全文
posted @ 2020-04-24 11:29
topass123
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使用中序遍历，返回第k个数来处理 # Definition for a binary tree node. # class TreeNode: # def __init__(self, x): # self.val = x # self.left = None # self.right = None 阅读全文
posted @ 2020-04-24 00:10
topass123
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