摘要：
```C++ /* // Definition for a Node. class Node { public: int val; vector children; Node() {} Node(int _val, vector _children) { val = _val; children = _children; ... 阅读全文
摘要：
```C++ /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; ... 阅读全文