Problem: Given a two-dimensional graph with points on it, find a line which passes the most number of points. 此题是Cracking the code 5th edition 第七章第六题,思路就是 n choose 2, 所以时间复杂度是O(n^2),因为没有更快的办法. 此题的难点在于两点一线计算出的斜率是浮点型,不好比较equality.所以其中需要有一个精确到哪一位的概念,英文是…

7.6 Given a two-dimensional graph with points on it, find a line which passes the most number of points. 这道题给了我们许多点,让我们求经过最多点的一条直线.给之前那道7.5 A Line Cut Two Squares in Half 平均分割两个正方形的直线一样,都需要自己写出点类和直线类.在直线类中,我用我们用斜率和截距来表示直线,为了应对斜率不存在情况,我们还需用一个flag来标记是否…

//定义二维平面上的点struct Point { int x; int y; Point(, ):x(a),y(b){} }; bool operator==(const Point& left, const Point& right) { return (left.x==right.x && left.y==right.y); } //求两个点连接成的直线所对应的斜率 double line_equation(const Point& P1, const Poi…

The tricky thing is how to decide the key for a hashmap. Especially when you intend to use self-defined objects as key. If you want to make two different objects 'equal' to each other, you have to overwrite equals() and hashCode(). The simple rule is…

Chapter 1. Arrays and Strings 1.1 Unique Characters of a String 1.2 Reverse String 1.3 Permutation String 1.4 Replace Spaces 1.5 Compress String 1.6 Rotate Image 1.7 Set Matrix Zeroes 1.8 String Rotation Chapter 2. Linked Lists 2.1 Remove Duplicates…

iOS 绘制1像素的线 一.Point Vs Pixel iOS中当我们使用Quartz,UIKit,CoreAnimation等框架时,所有的坐标系统采用Point来衡量.系统在实际渲染到设置时会帮助我们处理Point到Pixel的转换. 这样做的好处隔离变化,即我们在布局的事后不需要关注当前设备是否为Retina,直接按照一套坐标系统来布局即可. 实际使用中我们需要牢记下面这一点: One point does not necessarily correspond to one physic…

Description In a wireless network with multiple transmitters sending on the same frequencies, it is often a requirement that signals don't overlap, or at least that they don't conflict. One way of accomplishing this is to restrict a transmitter's cov…

http://poj.org/problem?id=1106 Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4488   Accepted: 2379 Description In a wireless network with multiple transmitters sending on the same frequencies, it is often a requirement that signals don…

3315: [Usaco2013 Nov]Pogo-Cow Time Limit: 3 Sec  Memory Limit: 128 MBSubmit: 143  Solved: 79[Submit][Status] Description In an ill-conceived attempt to enhance the mobility of his prize cow Bessie, Farmer John has attached a pogo stick to each of Bes…

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Circle and Points Time Limit: 5000MS   Memory Limit: 30000K Total Submissions: 6850   Accepted: 2443 Case Time Limit: 2000MS Description You are given N points in the xy-plane. You have a cir…