永夜莫明的博客

Segment setA segment and all segments which are connected with it compose a segment set. The size of a segment set is the number of segments in it. The problem is to find the size of some segment set...

In geometry the Fermat point of a triangle, also called Torricelli point, is a point such that the total distance from the three vertices of the triangle to the point is the minimum. It is so named be...

题目链接：http://codeforces.com/contest/474/myCaptain Marmot wants to prepare a huge and important battle against his enemy, Captain Snake. For this battle he has n regiments, each consisting of 4 moles....

The Swedish company SKF makes ball bearings. As explained by Britannica Online, a ball bearing is “one of the two types of rolling, or anti friction, bearings (the other is the roller bearing).Its f...

链接：https://ac.nowcoder.com/acm/contest/553/A来源：牛客网Chino的数学很差，因此Cocoa非常担心。这一天，Cocoa准备教Chino学习圆与直线的位置关系。众所周知，直线和圆有三种位置关系：相离、相切、相割，主要根据圆心到直线的距离来判定。现在我们来看看作业吧：是以整点为圆心、正整数为半径的圆，整点分别是圆外一点以及轴上的一点...