设二叉树结点值为大写字母，输入二叉树的前序遍历和中序遍历序列，生成此二叉树，输出该二叉树的后序遍历和按层次遍历序列。输入某结点值，在二叉树中查找该结点，若该结点存在，则输出从根到该结点的路径，否则给出不存在信息。(A two fork tree node value is capitalized, and the preorder traversal and sequence traversal sequence of the two fork tree is input to generate the two binary tree, and output the traversal and hierarchical traversal sequence of the two fork tree. Input a node value and find the node in the two forked tree. If the node exists, the path from the root to the node is output, otherwise the information is not present.)