摘要：
https://oj.leetcode.com/problems/add-two-numbers/ You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single... 阅读全文
摘要：
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. 水题，注意 dummy node 的使用即可，在不确定头节点的情况下，应该使用 dummy node，如此可以简化... 阅读全文