利用降幂公式..呃,还是自己去搜题解吧.知道降幂公式后,就不难了. #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #define LL unsigned long long using namespace std; bool mod[100005]; LL PHI(LL P){ LL ret=1; for(LL i=2;i*i<=P;i++)…

What is N? Problem's Link: http://acm.hdu.edu.cn/showproblem.php?pid=4335 Mean: 给你三个数b.P.M,让你求有多少个n满足下式. analyse: 看到数据被吓到了,没半点思路,后来看了解题报告,方法竟然是暴力! 当然暴力是有条件的. 有这样一个公式: A^x = A^(x % Phi(C) + Phi(C)) (mod C) (x>=Phi(C)) 这个公式的具体证明原来在aekdycoin的百度空间有,但是随着百…

Problem Description In the ACM International Collegiate Programming Contest, each team consist of three students. And the teams are given 5 hours to solve between 8 and 12 programming problems.  On Mars, there is programming contest, too. Each team c…

意甲冠军:N个人M通过主打歌有自己的期望,每个问题发送人玩.它不能超过随机播放的次数1,追求最大业绩预期 (1 ≤ N ≤ 10,1 ≤ M ≤ 1000). 主题链接:pid=5045" target="_blank">http://acm.hdu.edu.cn/showproblem.php?pid=5045 -->>设dp[i][j]表示已出战了前i - 1道题目,已出战的人的状态序列为j,如今要做第i道题目的最大期望.则最后要求的结果为max{dp[…

Contest Problem Description In the ACM International Collegiate Programming Contest, each team consist of three students. And the teams are given 5 hours to solve between 8 and 12 programming problems. On Mars, there is programming contest, too. Each…

Coding Contest Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2653    Accepted Submission(s): 579 Problem Description A coding contest will be held in this university, in a huge playground. The…

此题用到的公式:a^b%c=a^(b%phi(c)+phi(c))%c (b>=phi(c)). 1.当n!<phi(p)时,直接暴力掉: 2.当n!>=phi(p) && n!%phi(p)!=0,用上面公式求: 3.当n!>=phi(p) && n!%phi(p)==0,变为n^(phi(p))%p,找循环节,就可以了 #include<iostream> #include<stdio.h> #include<alg…

题解:我们使用一个二位数组dp[i][j]记录进行到第i个任务时,人组合为j时的最大和(这里的j我们用二进制的每位相应一个人). 详细见代码: #include <iostream> #include <cstdio> #include <cstring> #include <cmath> using namespace std; typedef long long ll; double s[11][1010]; double dp[1010][1050];…

pid=5045">主题链接~~> 做题感悟:比赛时这题后来才写的,有点小尴尬.两个人商议着写写了非常久才写出来,I want to Powerful ,I believe me . 解题思路: 遗憾 ! 感觉领悟能力太低 .由于随意时刻随意两个人做的题不超过 1 题 ,so~>  必须是一轮一轮的来(n 道题一轮),每一个人在一轮中仅仅能做一题.假设多做一题就,有可能某个人没选,某个人选择了两道,这样就不符合规定了 . 用 1  代表选择.0  代表没选择.进行某一行的时候就…

树状数组,主要是抓住要求连续1的个数.这样,初始时,相同的加1,不同的加0. 查询时,用二分搜索右边界.就是比较当前mid-l+1的值与他们之间1的个数(这可以通过树状数组求区间和得出),记录右边界即可. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <string.h> #define lowbit(x) ((x)&a…