正则表达式: 是指一个用来描述或者匹配一系列符合某个语法规则的字符串的单个字符串.其实就是一种规则.有自己特殊的应用. public class Demo2_Regex { public static void main(String[] args) { /*字符类 [abc] a.b 或 c(简单类) [^abc] 任何字符,除了 a.b 或 c(否定) [a-zA-Z] a 到 z 或 A 到 Z,两头的字母包括在内(范围) [a-d[m-p]] a 到 d 或 m 到 p:[a-dm…
Python Standard Library "We'd like to pretend that 'Fredrik' is a role, but even hundreds of volunteers couldn't possibly keep up. No, 'Fredrik' is the result of crossing an http server with a spam filter with an emacs whatsit and some other stuff be…
I know many people are bored of the string splitting problem, but it still seems to come up almost daily on forum and Q & A sites like StackOverflow. This is the problem where people want to pass in a string like this: EXEC dbo.UpdateProfile @UserI…
20160523 百度之星初赛第一场 1001 All X Problem Description F(x, m)F(x,m) 代表一个全是由数字xx组成的mm位数字.请计算,以下式子是否成立: F(x,m) mod k ≡ c Input 第一行一个整数TT,表示TT组数据. 每组测试数据占一行,包含四个数字x,m,k,c 1≤x≤9 1≤m≤10^10 0≤c<k≤10,000 Output 对于每组数据,输出两行: 第一行输出:"Case #i:".ii代表第ii组测试数…
A. Div. 64 time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Top-model Izabella participates in the competition. She wants to impress judges and show her mathematical skills. Her problem is f…
Problem A Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description 度熊手上有一本字典存储了大量的单词,有一次,他把所有单词组成了一个很长很长的字符串.现在麻烦来了,他忘记了原来的字符串都是什么,神奇的是他竟然记得原来那些字符串的哈希值.一个字符串的哈希值,由以下公式计算得到: H(s)=\prod_{i=1}^{i\leq len(s)}…
