114. Telecasting station time limit per test: 0.25 sec. memory limit per test: 4096 KB Every city in Berland is situated on Ox axis. The government of the country decided to build new telecasting station. After many experiments Berland scientists cam…

Telecasting station Problem's Link Mean: 百慕大的每一座城市都坐落在一维直线上,这个国家的政府决定建造一个新的广播电视台. 经过了许多次试验后,百慕大的科学家们提出了一个结论:在每座城市的不满意度等于这座城市的市民数与这座城市与广播电视台的距离的乘积. 你需要找到这个一维直线上的一点来建造广播电视台,使得所有城市的不满意度的和最小. analyse: 个人觉得应该是加权平均数,然而却是求中位数. 可以这样想:随便挑一个点作为station,左右移动一下看看…

题目大意:在一个数轴上有N个点,每个点都有一个权值,在这个数轴上找一个点,是的每个点到这个点的距离之和乘上权值的总和最小. 分析:以前也遇到过类似的问题,不过并不知道这是带权值的中位数问题,百度百科有比较精彩的证明,可以证明出来跟这个位置和距离没有什么关系,只和权值有关系,假设这个点是T,那么 ∑d[L](L<T) + d[T] >= ∑d[R](R>=T+1),反之也成立. 代码如下: ==================================================…

题意: 百慕大的每一座城市都坐落在一维直线上.这个国家的政府决定建造一个新的广播电视台.经过了许多次试验后,百慕大的科学家们提出了一个结论,在每座城市的不满意度等于这座城市的市民数与这座城市与广播电视台的距离的乘积.找到这个一维直线上的一点来建造广播电视台,使得所有城市的不满意度的和最小. 输入格式 输入的第一行是一个正整数N(0<N<15000) 表示百慕大的城市数.下面N个点对 (X, P) 表示城市 (0<X, P<50000), X 是这座城市的坐标,P是市民数.所有的数都…

题目链接点这儿 一開始想都没想...直接上了三分...结果...sample的答案不一样...可是过了...然后又看了看. . . 发现这不就是高中或者初中出过的求中位数的题么. . .直接找到这些的中位数即可了....假设某一点处人口不止一个.那就把它拆成一个一个的点. 然后求中位数. 嗯... 这题就结束了. . . 至于三分的过程,事实上就是二分略微改进的版本号.二分仅仅能求单调的函数,假设函数在定义域内不是单调的,那么二分就失效了.当然. ..这时能够用数学上的无穷分逼近,通过分成若干小…

114. Telecasting station time limit per test: 0.5 sec. memory limit per test: 4096 KB Every city in Berland is situated on Ox axis. The government of the country decided to build new telecasting station. After many experiments Berland scientists came…

114. Telecasting station time limit per test: 0.25 sec. memory limit per test: 4096 KB Every city in Berland is situated on Ox axis. The government of the country decided to build new telecasting station. After many experiments Berland scientists cam…

SGU还是个不错的题库...但是貌似水题也挺多的..有些题想出解法但是不想写代码, 就写在这里吧...不排除是我想简单想错了, 假如哪位神犇哪天发现请告诉我.. 101.Domino(2015.12.16) 102.Coprimes 求φ(N). 1<=N<=10^4 按欧拉函数的公式直接算..O(N^0.5)(2015.12.16) #include<cstdio> #include<cstring> #include<algorithm> using n…

http://acm.sgu.ru/problemset.php?contest=0&volume=1 101 Domino 欧拉路 102 Coprime 枚举/数学方法 103 Traffic Lights 最短路 104 Little Shop of Flowers 动态规划 105 Div 3 找规律 106 The Equation 扩展欧几里德 107 987654321 Problem 找规律 108 Self-numbers II 枚举+筛法递推 109 Magic of Dav…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

LL谱面分析和难度标定 先介绍一下LL谱面的存储方式:TimeLine序列(简称TL序列),TL序列中的每一个元素(即音符)可以由一个C语言中的结构体来表示: struct note{ int line; //音符位置 double time; //音符按下时间 double elapseTime; //音符从按下到抬起经过的时间,只有L型音符该项不为零 }; 用比较数学化的表示方法来表示一下TL序列的各个属性: 音符的索引(下标)集合\(\mathbf{N}\): 音符的位置组成的序列\(p_…

A gas station has to be built at such a location that the minimum distance between the station and any of the residential housing is as far away as possible. However it must guarantee that all the houses are in its service range. Now given the map of…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

3维空间中的最小生成树....好久没碰关于图的东西了.....              Building a Space Station Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 3804   Accepted: 1940 Description You are a member of the space station engineering team, and are assigned a task in th…

Gas Station There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journ…

Recording my thought on the go might be fun when I check back later, so this kinda blog has no intention to be read by others(its just for recording, not article). but if you insist, hope you enjoy it. if you find me wrong, please let me know, very a…

Candy There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following requirements: Each child must have at least one candy. Children with a higher rating get more ca…

Description Roger Wilco is in charge of the design of a low orbiting space station for the planet Mars. To simplify construction, the station is made up of a series of Airtight Cubical Modules (ACM's), which are connected together once in space. One…

Learning about REST An Abstract Example Why Should You Care about REST? WCF and REST WebGetAttribute and WebInvokeAttribute UriTemplate and UriTemplateTable WebHttpBinding and WebHttpBehavior WebServiceHost and WebServiceHostFactory Using the Example…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

关于完整解答Leo C.W博客中名为“我们公司的ASP.NET 笔试题,你觉得难度如何”的所有题目,请大家鉴定,不足之处,敬请指教! 第1到3题解答如下: public enum QuestionType { Text = , MultipleChoice = } public interface IQuestion { string Title { get; set; } QuestionType Category { get; } string GetAnswer(); } public a…

1437. Gasoline Station Time limit: 1.0 secondMemory limit: 64 MB Once a gasoline meter broke at a filling station. Fortunately, there was an overflow clipper (a device that makes it possible not to overfill a tank). An ACM-programmer came to this sta…

在之前几篇文章中,介绍了关于Apsose.cell这个强大的Excel操作控件的使用,相关文章如下: 使用Aspose.Cell控件实现Excel高难度报表的生成(一) 使用Aspose.Cell控件实现Excel高难度报表的生成(二) 使用Aspose.Cell控件实现多个Excel文件的合并 这几篇文章,都对Apose.Cell这个控件生成各种Excel的方式进行了阐述,对直接把DataTable或者IList生成Excel的操作,对通过模板方式实现自定义报表的各种方式,以及多个文件的合并的…

继续在上篇<使用Aspose.Cell控件实现Excel高难度报表的生成(一)>随笔基础上,研究探讨基于模板的Aspose.cell报表实现,其中提到了下面两种报表的界面,如下所示: 或者这样的报表格式 首先来分析第一种报表,这个其实还是比较固定的二维表,我们只要绑定相关的信息即可,设计模板如下所示:  实际生成的报表如下所示: 实现的代码其实不复杂,如下所示: private DataTable GetTable(string sql)         {            Databa…

Description: There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the jour…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

http://poj.org/problem?id=1202 难度集中在输出格式上,因为输出格式所以是高精度 递推式: 血缘肯定只有从双亲传到儿子的,所以,设f,m为双亲,son为儿子,p[i][j]为i和j之间的血缘关系,p[j][i]=p[i][j] 则: p[son][f]=p[son][m]=0.5+0.5*p[f][m] 对于兄弟和其他不是双亲的节点j,则有 p[son][j]=0.5*(p[f][j]+p[m][j]) 另外:http://swerc.up.pt/2002/Data/…

Problem link: http://oj.leetcode.com/problems/gas-station/ We can solve this problem by following algorithm. CompleteCircuit(gas, cost): let n be the number of stations // Check if there exists i such that A[i,n] >= 0 if (sum of gas) > (sum of cost)…

There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from station i to its next station (i+1). You begin the journey with an e…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=2645 find the nearest station Description Since dandelion has left the hometown so long,she finds it's difficult to find the station in the city.So she needs you ,a clear programmer, to help her.Now you…