已知两个单链表 A 和 B 分别表示两个集合，其元素递增排列。请编写程序求集合 A 和 B 的交集 C = A B，要求单链表C按其元素递增排列，并利用原表（即表A和表B）的结点空间存放表C。-A list of known and two single-B, respectively, two sets of its elements in ascending order. Please write a program seeking the intersection of sets A and B C = A 　B, required a single list element of C according to increasing order, and to use the original form (ie Form A and Form B), node storage table space C.