A sequence of N positive integers (10 < N < 100 000), each of them less than or equal 10000, and a positive integer S (S < 100 000 000) are given. Write a progr...

题意：就是给你一个n，让你每次可以改变n的位数上的一个数，每次操作完必须是素数，要求最小次数的改变到达m。

In this problem, you are given n, you have to find Hn.

题解：求一个数的次幂，然后输出前三位和后三位，后三位注意有前导0的情况。 后三位直接用快速幂取模求解。

N wizards are attending a meeting. Everyone has his own magic wand. N magic wands was put in a line, numbered from 1 to n(Wand_i owned by wizard_i). After the m...

There are n single boys and m single girls. Each of them may love none, one or several of other people unrequitedly and one-sidedly. For the coming q days, each...

The modular modular multiplicative inverse of an integer a modulo m is an integer xsuch that a-1≡x (mod m). This is equivalent to ax≡1 (mod m).

文章目录语法1. 判断2. 循环3. 函数4. case: 当有有情况符合时执行相应动作语句，否则就退出语法1. 判断# [ ] 中间的变量左右保留各保留一个空格 if [ -d $0 ]; then echo "this is dir"elif [ -f $0 ]; then ....

表达式：通过变量或者常量和运算符连接起来成为表达式 在程序中表达式的结果可以作为程序的条件出现

偶尔写写ACM水题还是挺好玩的。(好吧其实是老婆求助我才看滴)题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1006一开始看到这题的时候，感觉一天2