题解 | #树的子结构#
二叉树的镜像
http://www.nowcoder.com/practice/a9d0ecbacef9410ca97463e4a5c83be7
# class TreeNode: # def __init__(self, x): # self.val = x # self.left = None # self.right = None # # 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 # # # @param pRoot TreeNode类 # @return TreeNode类 # class Solution: def Mirror(self , pRoot ): #递归法 if pRoot==None: return None if pRoot.left==None and pRoot.right==None: return pRoot tmp=self.Mirror(pRoot.right) pRoot.right=self.Mirror(pRoot.left) pRoot.left=tmp return pRoot