摘要： 题目如下： Given an array A of strings made only from lowercase letters, return a list of all characters that show up in all strings within the list (inclu 阅读全文

摘要： 题目如下： We are given that the string "abc" is valid. From any valid string V, we may split V into two pieces X and Y such that X + Y (X concatenated wit 阅读全文

摘要： 题目如下： Given an array A of 0s and 1s, we may change up to K values from 0 to 1. Return the length of the longest (contiguous) subarray that contains on 阅读全文