convex nails

containing a single integer n (3 OutputPrint exactly one line for each test case. The line should contain exactly and numbers separated by one space. These numbers is the coordinates of the centre of gravity. Round the coordinates to the nearest number with exactly, digits after the decimal point (0.005 rounds up to 0.01). Note that the centre of gravity may outside the polygon, if it shape is not convex. If There is such a case in the

Topic PortalTest instructions: To find the shortest route, so that any point on the line away from the castle at least L distanceAnalysis: Convex hull First, answer = length of convex hull + circumference of circle with L as radius/************************************************* author:running_time* Created time:2015/10/25 11:00:48* File N Ame:P oj_1113.cpp ************************************************

Test instructions is a world with many countries, each with n buildings, including a power station and N-1 buildings, all of which are surrounded by a convex hull that is the size of the country. A missile that explodes within a country can cause the country to power down.Step 1: Find the convex hull of each country (I use the horizontal sort is all kinds of pits, change the fork by the sort before, mainly

RescueTime limit:2000/1000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 398 Accepted Submission (s): 296Problem descriptioni work at NASA Outer Space Rescue team which needs much courage and patient. In daily life, I always receive a lot of mission, and I must complete it right now.Today, team leader announced me that there are a huge spaceship dropping anchor in the out space, and we should reach there For rescue. As a working principle, at first, we should c

input contains several test cases, each of the which describes a hypothetical forest. Each test case is begins with a line containing a single integer n, 2 The input ends with a empty test case (n = 0).OutputFor each test case, compute a subset of the trees such that, using the wood from that subset, the remaining trees can E Nclosed in a single fence. Find the subset with minimum value. If more than one such minimum-value subset exists, choose one with the smallest number of trees. For simplic

Determines whether a polygon can be placed in a convex hull. Perform a convex hull for all vertices, and add both the key and common vertices to the convex hull set. If a vertex in the graph storm set is a polygon vertex, no is output. Else Yes View code # Include # Include # Include # Include Using Namespace STD;Typedef _ int64 LLD; Const Double

The main topic: give the plane n points, to find the smallest circle coverage.Idea: The round cover problem is only related to the points on the convex hull in all points, so the convex hull is first asked, then the data range is reduced. It's probably just a little bit of logn left. This way, you can have a random wave.First find all three points of the circle, and then find two points for the diameter of

The first time to play dynamic convex package maintenance dp, feel learned a super many things.First of all, set is so easy to use!!! Two queries can be implemented by controlling a flag, maintaining the convex hull and finding the slope KBut it's just overloaded operators and some of the details are disgusting, 90 lines to solveThere is a CDQ in the back, find time to learn, to see if you can deal with a l

It is known that V1.. VN is a set of Convex Polygon vertices with a disordered surround order. Steps: 1. in the plane, take any direction (any two points can be connected. If it is a 2D vertex, you can directly go to the X axis or Y axis) as the direction, find the vertices VZ and the secondary vertices Vy in this direction. 2. take the vzvy direction as the base Dir, And take VZ to the VX of other vertices (VX is V1... in VN, except for any poin

The convex hull is obtained first, then the area is calculated by the convex hull, and the answer is divided by 50.Code:#include POJ 3348 Cows (convex hull + polygon area)

Language: Grandpa's EstateTime Limit: 1000 MS Memory Limit: 10000 KTotal Submissions: 8990 Accepted: 2383 DescriptionKamran the Believer inherits a grandmother's convex polygon estate. the perimeter of the manor is surrounded by ropes and wooden piles. but some ropes and stakes are missing. check whether the manor surrounded by remaining wooden piles is a stable convex bag (that is, the remaining nail can d

Bridge Communication SS Islands Time Limit:1000 MS Memory Limit:65536 K Total Submissions:8071 Accepted:2364 Special Judge Description Thousands of thousands years ago there was a small kingdom located in the middle of the Pacific Ocean. the territory of the kingdom consists two separated islands. due to the impact of the ocean current, the shapes of both the islands became convex polygons. the king of t

To give you illustrator software users to detailed analysis of the design of concave-convex printing text effect of the drawing tutorial. Tutorial Sharing: Well, the above information is small set for you illustrator of this software users brought to the detailed design of concave-convex printing text effect of the entire content of the drawing tutorial share, you see the u

Problem Solving Ideas: The problem is to ask for the convex hull area, then divide by 50 on the line. Do not know what is convex bag can go to Baidu For area, select a point on the convex hull as the base point, and then divide the polygon into a lot of triangles, and then use the cross product to calculate the Triangle area can be. #include

Zero at line for number of trees terminates the input for your program. Outputminimal required radius of the circle ring I has to choose. The precision should be 10^-2. Sample Input21 0-1 00 Sample Output1.50 Authorzjt Recommendlcy Topic Analysis:The radius of the minimum cover circle for the convex hull. In fact, after the

2618: [Cqoi2006] Convex polygon Description counter-clockwise gives the vertex coordinates of n convex polygons, and asks them to cross the area. For example, when n=2, two convex polygons such as: The area of the intersecting portion is 5.233.Input The first line has an integer n, which represents the number of conv