【计数原理】【UVA11538】 Chess Queen

【【计数原理】【UVA11538】 Chess Queen】的更多相关文章

UVA11538 - Chess Queen（数学组合）

题目链接:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2533 题意:在n*m的棋盘上放两个(黑和白)相互攻击的皇后,求有多少种方法? 0<=(n,m)<=10e6; 下图是2*2的方案数12: 很明显要按行列还有对角三种来考虑,每种的方案数相加即可: 每一行我们要从m个格子中选择2个进行放所以方案数是m*(m-1),共有…

UVA11538 Chess Queen

题意给一个\(n \times m\)的棋盘,输出有多少种方法放置两个互相攻击的皇后. \(n,m \leq 10^6\) 分析参照刘汝佳的题解. 横.竖.斜三种情况互不相干,加法原理统计. 横竖都好计算,斜着需要推一推. 然后注意溢出问题. 代码 #include<iostream> #include<cstdio> #include<cstdlib> #include<cmath> #include<set> #include<ma…

Uva 11538 - Chess Queen

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2533 Root 11538 - Chess Queen Time limit: 2.000 seconds You probably know how the game of chess is played and how chess queen operates. Two chess qu…

UVa11538 A Chess Queen

A Chess Queen Problem A Chess Queen Input: Standard Input Output: Standard Output You probably know how the game of chess is played and how chess queen operates. Two chess queens are in attacking position when they are on same row, column or diagona…

STM32F4_TIM基本延时（计数原理）

Ⅰ.概述 STM32的TIM定时器分为三类:基本定时器.通用定时器和高级定时器.从分类来看就知道STM32的定时器功能是非常强大的,但是,功能强大了,软件配置定时器就相对复杂多了.很多初学者甚至工作了一段时间的人都不知道STM32最基本的计数原理. 虽然STM32定时器功能强大,也分了三类,但他们最基本的计数部分原理都是一样的,也就是我们常常使用的延时(或定时)多少us.ms等. 接下来我会讲述关于STM32最基本的计数原理,详细讲述如何做到(配置)计数1us的延时,并提供实例代码供大家参考学习…

组合数学 UVa 11538 Chess Queen

Problem A Chess Queen Input: Standard Input Output: Standard Output You probably know how the game of chess is played and how chess queen operates. Two chess queens are in attacking position when they are on same row, column or diagonal of a chess bo…