[LeetCode] Symmetric Tree
Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric ...
原文：leetcode: Symmetric Tree
判断一棵树是否对称，如果对称，中序遍历的结果一定也是对称的。 看了一下别人的代码，也可以在递归的过程中直接去判断。 ...
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