Solved

How Can I DO That

Posted on 2015-01-09
5
73 Views
Last Modified: 2015-02-06
Consider a two dimensional co-ordinate system with two axes; X & Y. This system is identified by positive integer co-ordinates. Meaning, every valid point in this system is represented by two values (x, y) where 0 < x,y <100.
 
You are given an input set of lines, specified by the co-ordinates of the two end-points.
 
Write a program to identify all closed shapes created by the specified lines.
 
Input Format (the program should accept this simple text file called "input.txt" placed in the classpath):
 
A1, B1; C1, D1
A2, B2; C2, D2

An, Bn; Cn, Dn
 
Expected Output (based on actual values of the input lines):
 
There are two triangles and 1 square based on the input.
Triangle 1  with vertices (a1,b1; a2, b2; a3,b3)
Triangle 2 with vertices (a5,b5; a6, b6; a7, b7)
Square 1 with vertices (a8, b8; a9, b9; a10, b10; a11, b11)
 
Note:
 
The input data may be such that some shapes overlap.
You don't have to find shapes formed by intersection of two shapes. For example, if a square and triangle overlap such that there is another small triangle formed at the intersection, you don't have to report that.
For the sake of scope, report only the following shapes, if any - triangle, any quadrilateral, pentagon. 

Open in new window

0
Comment
Question by:Naren Kumar
5 Comments
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40539898
Is this a homework task?
0
 
LVL 84

Accepted Solution

by:
ozo earned 250 total points
ID: 40539902
For a brute force approach you could have a table for each of the 10201 possible points listing all the points to which it is connected by a line.

You could then take the triple, quadruple, and pentuple closures of that list.
0
 
LVL 85

Assisted Solution

by:Mike Tomlinson
Mike Tomlinson earned 250 total points
ID: 40540632
You could also do it by building a graph where each node contains the two endpoints and they point to other nodes that have a point in common.  Then traverse the graph and count the number of edges you traveled before coming to a point you've already seen (meaning it is closed).  It simply specifies triangle, quadrilateral and pentagon (not regular pentagon or specific quads like parallelogram, rectangle or square) so you don't need to worry about angles or anything.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Nadia
Suppose you use Uber application as a rider and you request a ride to go from one place to another. Your driver just arrived at the parking lot of your place. The only thing you know about the ride is the license plate number. How do you find your U…
The greatest common divisor (gcd) of two positive integers is their largest common divisor. Let's consider two numbers 12 and 20. The divisors of 12 are 1, 2, 3, 4, 6, 12 The divisors of 20 are 1, 2, 4, 5, 10 20 The highest number among the c…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

929 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now