在计算机科学中，二叉树是每个节点最多有两个子树的树结构。通常子树被称作左子树和右子树。二叉树常被用于实现二叉查找树和二叉堆。该算法通过输入前序和中序生成二叉树(In computer science, a two tree is a tree structure with a maximum of two subtrees for each node. Usually the subtrees are called the left subtree and the right subtree. Two forked trees are often used to implement two fork search trees and two forked heaps. The algorithm generates two forked trees through the input preorder and the middle order)