愚者

题目：Crazy Town is a plane on which there are n infinite line roads. Each road is defined by the equation aix + biy + ci = 0, whereai andbi are not both equal to the zero. The roads divi

题目：Problem DescriptionThere are n points on the plane, and the ith points has a value vali, and its coordinate is (xi,yi). It is guaranteed that no two points have the same coordinate,

题目：Being well known for its highly innovative products, Merck would definitely be a good target for industrial espionage. To protect its brand-new research and development facility the company h

题目：Given an integer N, your task is to judge whether there exist N points in the plane such that satisfy the following conditions:1. The distance between any two points is no greater than 1.0.

题目：Problem DescriptionOn a two-dimensional plane, give you n integer points. Your task is to figure out how many different regular polygon these points can make. InputThe input file co

题目：Cat Noku has obtained a map of the night sky. On this map, he found a constellation withn stars numbered from 1 to n. For each i, the i-th star is located at coordinates(xi, yi). No

题目：在一个平面内给定n个点，任意三个点不在同一条直线上，用这些点可以构成多少个平行四边形？一个点可以同时属于多个平行四边形。Input 多组数据（每组数据第一行一个整数n(4Output 每组数据输出一个整数，表示用这些点能构成多少个平行四边形。Sample Input 40 11 01 12 0Sample Outp

题目：Problem Description话说上回讲到海东集团推选老总的事情，最终的结果是XHD以微弱优势当选，从此以后，“徐队”的称呼逐渐被“徐总”所取代，海东集团（HDU）也算是名副其实了。创业是需要地盘的，HDU向钱江肉丝高新技术开发区申请一块用地，很快得到了批复，据说这是因为他们公司研发的“海东牌”老鼠药科技含量很高，预期将占全球一半以上的市场。政府划拨的这块用地是一个多

题目：DescriptionCalculate the number of toys that land in each bin of a partitioned toy box.Mom and dad have a problem - their child John never puts his toys away when he is finished playing wit

1、向量 向量的定义为既有方向，又有长度，且可以自由平移的线段（注意不是有向线段，有向线段不可以自由平移，因为具有起点）。PS：程序实现中，我们经常把向量的起点移到(0,0)，然后用终点坐标(x,y)表示这个向量。向量的定义： struct Vector{  double x,y;  Vector(double x=0,double y=0):x(x),y(y){}