James Pan

原题网址：https://leetcode.com/problems/intersection-of-two-linked-lists/ Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following

原题网址：https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/ Given a string, find the length of the longest substring T that contains at most 2 distinct characters.