Dirichlet's Theorem on Arithmetic Progressions Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 16733 Accepted: 8427 Description If a and d are relatively prime positive integers, the arithmetic sequence beginning with a and increasing…
Dirichlet's Theorem on Arithmetic Progressions Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 13636 Accepted: 6808 Description If a and d are relatively prime positive integers, the arithmetic sequence beginning with a and increasing…
题目地址:http://poj.org/problem?id=3006 刷了好多水题,来找回状态...... Dirichlet's Theorem on Arithmetic Progressions Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 16803 Accepted: 8474 Description If a and d are relatively prime positive integers, t…
http://poj.org/problem?id=3006 #include<stdio.h> #include<math.h> int is_prime(int n) { int i,m; ) ; m = sqrt(n); ; i <= m; i ++) { ) ; } ; } int main() { int a,d,n,i; while(~scanf("%d%d%d",&a,&d,&n)) { ; &&d==…
Dirichlet's Theorem on Arithmetic Progressions Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 15398 Accepted: 7714 Description If a and d are relatively prime positive integers, the arithmetic sequence beginning with a and increasing…
The Hundred Greatest Theorems The millenium seemed to spur a lot of people to compile "Top 100" or "Best 100" lists of many things, including movies (by the American Film Institute) and books (by the Modern Library). Mathematicians wer…
Dirichlet's Theorem on Arithmetic Progressions Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 15245 Accepted: 7641 Description If a and d are relatively prim…
In our last article, we introduced four integral operators in the boundary integral equations in BEM. Among them, the two compact operators \(T_K\) and \(T_{K^{*}}\) are of the second Fredholm type and have strong singularity when the model geometry…
质数(prime number)又称素数,有无限个.一个大于1的自然数,除了1和它本身外,不能被其他自然数整除,换句话说就是该数除了1和它本身以外不再有其他的因数:否则称为合数. 最小的质数是2. [例1]Goldbach's Conjecture (POJ 2262) Description In 1742, Christian Goldbach, a German amateur mathematician, sent a letter to Leonhard Euler in w…
Source: wiki: Parseval's theorem As for signal processing, the power within certain frequency band = the sum of (power spectrum at all frequencies within the frequency band)^2.…
1 问题描述 LDA由Blei, David M..Ng, Andrew Y..Jordan于2003年提出,是一种主题模型,它可以将文档集中每篇文档的主题以概率分布的形式给出,从而通过分析一些文档抽取出它们的主题(分布)出来后,便可以根据主题(分布)进行主题聚类或文本分类.此外,一篇文档可以包含多个主题,文档中每一个词都由其中的一个主题生成. 人类是怎么生成文档的呢?LDA的这三位作者在原始论文中给了一个简单的例子.比如假设事先给定了这几个主题:Arts.Budgets.Childre…
Stat2.2x Probability(概率)课程由加州大学伯克利分校(University of California, Berkeley)于2014年在edX平台讲授. PDF笔记下载(Academia.edu) Summary Standard Error The standard error of a random variable $X$ is defined by $$SE(X)=\sqrt{E((X-E(X))^2)}$$ $SE$ measures the rough size…
