Live2d Test Env
摘要: The Little Elephant loves strings very much. He has an array a from n strings, consisting of lowercase English letters. Let's number the elements of t 阅读全文
posted @ 2018-03-17 22:33 nimphy 阅读(518) 评论(0) 推荐(0) 编辑
摘要: 题目:CodeForces196-D:The Next Good String 题意:给定仅由小写字母组成的字符串S和一个正整数m。求一个长度与S相同的仅由小写字母组成的字符串S1,满足: S1的字典序>S的字典序 S1中不含长度大于等于d的回文串。 思路:许昊然的文章里叫“逐位确定法”,以为之前没 阅读全文
posted @ 2018-03-17 19:57 nimphy 阅读(324) 评论(3) 推荐(0) 编辑
摘要: Rubik is very keen on number permutations. A permutation a with length n is a sequence, consisting of n different numbers from 1 to n. Element number  阅读全文
posted @ 2018-03-17 11:13 nimphy 阅读(461) 评论(0) 推荐(0) 编辑