Home > Others

Question: How many intersections a straight line has?

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞
Http://www.newsmth.net/bbstcon.php? Board = Algorithm & gid = 8898

Sender: snoowball (snowball), email area: Algorithm
Question: Re: QuestionAlgorithmQuestion
Mail station: Shui muCommunity(Fri Oct 26 09:30:33 2007), Station

With the sweep line algorithm, the time complexity is O (n + k) * logn), and the space complexity is O (n)
K indicates the number of intersections, which is applicable to the fact that the intersections are not very dense.
[Mentioned in the masterpiece cutepig :]
: N straight lines are drawn on a blank sheet of paper, and a method with the lowest time complexity is used to calculate the total number of intersections of these straight lines.
: The line here indicates a line segment.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More