输入为两个带头结点的循环链表并按升序对其输入数据，然后分别按升序和降序合并两个链表为一个，最后输出合并后的链表的数据。-Enter the cycle table for the two head nodes and enter the data in ascending order, and then merge the two lists in ascending and descending order respectively, and finally output the data of the linked list.