17997 Simple Counting 时间限制:2000MS  内存限制:65535K提交次数:0 通过次数:0 题型: 编程题   语言: 不限定 Description Ly is crazy about counting . Recently , he got a simple problem , but he had to learn Gaoshu these days .So , he turns to you for help . You are given a sequenc…

题目链接:Inversion Counting 题意: 定义数列{ai|i=1,2,...,n}的逆序对如下:对于所有的1≤j<i≤n,若ai<aj,则<i,j>为一个逆序对.于是,对于一个数列a[1..n],给定m次操作.对于每一次操作,给定l,r(1≤l<r≤n),将序列a[l..r]倒置.求倒置后的逆序对的数量的奇偶性. 题解: 假设现在我们有一个序列并翻转这个序列[l,r]区间里面的数.假设某个数的k值是指在这个值后面小于这个数的数的个数,其实我们可以发现对于[1,l…

Description Let f(n) be the number of factors of integer n. Your task is to count the number of i(1 <= i < n) that makes f(i) = f(n). Input One n per line (1 < n <= 1000000). There are 10000 lines at most. Output For each n, output counting re…

Problem Description As we know, sequence in the form of an=a1+(n−1)d is called arithmetic progression and sequence in the form of bn=b1qn−1(q>1,b1≠0) is called geometric progression. Huazheng wants to use these two simple sequences to generate a simp…

A. Simple 本来以为很难,考场瞎推了推好像会了...... 想起小凯的诱惑,迷?? 首先$n$,$m$,$q$同除$gcd(n,m)$,显然$q$以内的数假如不是$gcd$的倍数,那么一定不能被表示 然后在求新的$q$以内不能被表示的数 因为现在$n$,$m$互质,所以$n\times m$至q的数一定能被表示,我们就把范围缩小到$min(n*m,q)$以内 因为在$n\times m$以内,所以取不同$n$,$m$系数时结果不同 所以就因为$m$很小,直接枚举$m$的系数,最多枚举$n…

You are given n rods of length 1,2, . . . , n. You have to pick any 3 of them and build a triangle. Howmany distinct triangles can you make? Note that, two triangles will be considered different if they haveat least 1 pair of arms with different length…

题目描述 对于给定正整数$n,m$,我们称正整数$c$为好的,当且仅当存在非负整数$x,y$,使得$n\times x+m\times y=c$. 现在给出多组数据,对于每组数据,给定$n,m,q$,求$[1,q]$内有多少个正整数不是好的. 输入格式 第一行,一个整数$T$表示数据组数.接下来每行三个数,分别表示$n,m,q$,即一组询问. 输出格式 对于每组数据,输出一行表示答案. 样例 样例输入: 278 100 470 3 34 样例输出: 423 数据范围与提示 对于$30\%$的数据…

Very Simple Counting Time Limit: 1 Second      Memory Limit: 32768 KB Let f(n) be the number of factors of integer n. Your task is to count the number of i(1 <= i < n) that makes f(i) = f(n). Input One n per line (1 < n <= 1000000). There are…

原文:https://iwringer.wordpress.com/2015/08/03/patterns-for-streaming-realtime-analytics/ Introduction More and more use cases, we want to react to data faster, rather than storing them in a disk and periodically processing and acting on the data. This…

About this Course You will learn how to build a successful machine learning project. If you aspire to be a technical leader in AI, and know how to set direction for your team's work, this course will show you how. Much of this content has never been…