以（F,C,L/R）三元组序列表示一颗二叉树（其中F表示该结点的父结点，C表示结点的值,L/R表示与父结点的关系），并由该序列创建链表结构的二叉树T-In (F, C, L/R) three tuple sequence represents a two fork tree (where F represents the parent node of the node, C represents the value of the node, L/R represents the relationship with the parent node), and by the sequence to create a list structure of the two fork tree T