两列双向链表相同值查询设计： 实现内容：构建两个双向链表，能够根据第一个链表中的值查询在第二个链表中的相同值的位置-2 bi-directional value chain the same query design: the realization of content: To construct two two-way linked list, according to the first list of values query in the second list value in