As we all know, the next Olympic Games will be held in Beijing in 2008. So the year 2008 seems a little special somehow. You are looking forward to it, too, aren't you? Unfortunately there still are months to go. Take it easy. Luckily you meet me. I…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=1852 题目大意: 求2008^n的所有因子和m对k取余,然后求2008^m对k取余. 解题思路: 首先将2008因式分解,2008 = 2^3 * 251 所以2008^n = 2^(3n) * 251^(n) 因子和m =(2^(3n+1)- 1) * (251^(n+1) - 1)/ 250 m需要对k取余数.由于余数k和250可能不互质,也就是没有逆元存在,那么需要用到通用公式: 所以可以用…

题目地址: http://acm.hdu.edu.cn/showproblem.php?pid=1852 这道题和HDU1452类似. 题意:给你一个n.k,让你求2008^n所有因子的和(包括1和本身)%k,得到m,然后输出2008^m%k. 题解:看我HDU1452题,这里有一点需要注意的是: s=(2^(3n+1)-1)(251^(n+1)-1)/250 因为gcd(250,k)不一定等于1,所以不能用求逆元的方法求解, 而k很小,所以我们可以将k乘以250,然后在进行,最后结果一定可以整…

hdu1852 Beijing 2008 Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/65535 K (Java/Others) Total Submission(s): 502 Accepted Submission(s): 172 Problem Description As we all know, the next Olympic Games will be held in Beijing in 2008. So…

Ping pong Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3109   Accepted: 1148 Description N(3<=N<=20000) ping pong players live along a west-east street(consider the street as a line segment). Each player has a unique skill rank. To i…

.一般默认情况下sql_mode默认为空,也就是不严格的sql检查 .如果sql_mode为空的情况下,测试: )); //定义一个name字段长度为定长2的tt3表 insert into tt3 values ('wo'); //正常插入,无措 insert into tt3 values ('woshi'); //正常插入,但值已被截取成了“wo” 修改sql_mode为严格模式: set session sql_mode = 'STRICT_TRANS_TABLES'; (): Data…

本原创文章属于<Linux大棚>博客,博客地址为http://roclinux.cn.文章作者为rocrocket. 为了防止某些网站的恶性转载,特在每篇文章前加入此信息,还望读者体谅. === [正文开始] 上文接<sed的流艺术之三>-linux命令五分钟系列之二十三 例十 如果设定了很多-e的command,它们的执行顺序是怎样的呢? [rocrocket@rocrocket programming]$ cat mysed.txt Beijing 2003 Beijing 2…

本原创文章属于<Linux大棚>博客,博客地址为http://roclinux.cn.文章作者为rocrocket. 为了防止某些网站的恶性转载,特在每篇文章前加入此信息,还望读者体谅. === [正文开始] 上文接:<sed的流艺术之二>-linux命令五分钟系列之二十二 例五 给某些字符串后面插入些内容 [rocrocket@rocrocket programming]$ cat mysed.txt Beijing London[rocrocket@rocrocket prog…

http://poj.org/problem?id=3928 Ping pong Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2087   Accepted: 798 Description N(3<=N<=20000) ping pong players live along a west-east street(consider the street as a line segment). Each player…

主题链接: PKU:http://poj.org/problem?id=3928 HDU:http://acm.hdu.edu.cn/showproblem.php?pid=2492 Description N(3<=N<=20000) ping pong players live along a west-east street(consider the street as a line segment). Each player has a unique skill rank. To im…