A - Email Aliases Time Limit:2000MS     Memory Limit:524288KB     64bit IO Format:%I64d & %I64u Submit Status Description Polycarp has quite recently learned about email aliases. Of course, he used to suspect that the case of the letters doesn't matt…

Description Polycarp has quite recently learned about email aliases. Of course, he used to suspect that the case of the letters doesn't matter in email addresses. He also learned that a popular mail server in Berland bmail.com ignores dots (character…

题意:给定于所有的邮箱,都是由login@domain这样的形式构成,而且字符都是不区分大小写的. 我们有一种特殊类型的邮箱——@bmail.com, 这种邮箱除了不区分大小写外—— 1,'@'之前的'.',有等同于无 2,'@'之前的第一个'+'之后的字符可以忽略不计 然后其他字符相同的被认定为邮箱相同. 现在给你 n 个邮箱,让你输出每个邮箱出现的次数与所有这个邮箱的原始串. 析:没什么好说的,就是先判断不是@bmail.com,然后再按要求去点,去+和@之间的值,然后一个一个的比较即可,这…

Email AliasesCrawling in process... Crawling failed Time Limit:2000MS     Memory Limit:524288KB     64bit IO Format:%I64d & %I64u Submit Status Description   Input   Output   Sample Input   Sample Output   Hint   Description Polycarp has quite recent…

题目链接:http://codeforces.com/problemset/problem/589/A Polycarp has quite recently learned about email aliases. Of course, he used to suspect that the case of the letters doesn't matter in email addresses. He also learned that a popular mail server in B…

Polycarp has quite recently learned about email aliases. Of course, he used to suspect that the case of the letters doesn't matter in email addresses. He also learned that a popular mail server in Berland bmail.com ignores dots (characters '.') and a…

题目链接:http://codeforces.com/problemset/problem/589/A 题目大意:给定n个邮件地址,任何电子邮件地址都将显示为“login @ domain”,其中: 1.a“login”是一个由非空的小写和大写字母序列以及点('.')和加号('+')组成的序列,从字母开始;2.a“domain”是一个由非空的小写和大写字母和点组成的序列,因为点将序列分成非空单词,仅由字母组成(即“domain”从字母开始,以字母结尾,不包含两个或多个连续点). 比较邮件地址时,…

题目链接:https://codeforces.com/contest/1090/problem/B Examplesstandard input The most famous characters of Pushkin’s works are Onegin \cite{onegin}, Dubrovsky \cite{dubrovsky} and Tsar Saltan \cite{saltan}. \begin{thebibliography}{99} \bibitem{saltan} A…

题目链接: http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=28214 题目大意:源串有如下变形:每次将串切为两半,位置颠倒形成新串.问经过K次变形后,与目标串相同的变形方案数.mod 1000000007. 解题思路: 奇葩的字符串DP.照着别人的题解写的,解释不出原理是什么. 首先统计出经过1次变形,就能和目标串相同的中间产物串(包含源串)的个数cnt.len表示源串长度,那么len-cnt就表示和目标串不同的个数. 用…

做一个map和字符串的转换,需要导入这些jar包,这是最基本的一些jar包. 经过多方尝试得出结论入下: 首先导入基本包:json-lib-2.2.3-jdk15.jar 如果没有这个jar包,程序是写不起来的. 现在保证了程序编译能够通过,跑一下 出现异常:org/apache/commons/lang/exception/NestableRuntimeException 导入commons-lang-2.3.jar,问题解决. 跑一下: 出现异常:java.lang.ClassNotFoun…