leetcode:Merge Two Sorted Lists；链表是从升序还是倒序排序？

Question

1. Merge Two Sorted Lists

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.

https://leetcode.com/problems...

我看这道题有一个测试用例，输入（[2],[1]）输出(1,2)
说明是升序，但是题目只是说列表是sorted的，没说明一定是升序吧，还是我有什么地方看漏了？

Answer 1

一般默认升序。