红鲤鱼绿鲤鱼与阿米娅

摘要： 题目 Given an array of strings strs, group the anagrams together. You can return the answer in any order. An Anagram is a word or phrase formed by rearr 阅读全文

摘要： 题目 Determine if a 9 x 9 Sudoku board is valid. Only the filled cells need to be validated according to the following rules: 1.Each row must contain th 阅读全文