James Pan

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.

原题网址：https://leetcode.com/problems/lru-cache/ Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get