Hints: If you notice carefully in the flattened tree, each node's right child points to the next node of a pre-order traversal. 上面是题目及提示信息,大概意思是要按照前序遍历的顺序,将其变成一个但链表(但还是用树结构存),OK,开始分析下: 按照题目要求,它要把左子树的所有节点按照前序的顺序,挂...
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