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'''LeetCode''' is an [[online discussion platform|online platform]] offering coding challenges and interview preparation resources for software engineers and developers. The service provides coding and algorithmic problems, enabling users to practice coding and improve their problem-solving abilities.<ref name=nytimes2023/> LeetCode has gained popularity among job seekers and coding enthusiasts as a resource for technical interviews and coding competitions.<ref name=":0">{{Cite web |last=Ansari |first=Tasmia |date=2022-11-17 |title=The Ultimate Guide to Cracking Data Science Interviews |url=https://analyticsindiamag.com/the-ultimate-guide-to-cracking-data-science-interviews/ |access-date=2023-06-10 |website=Analytics India Magazine |language=en-US}}</ref><ref>{{Cite web |last=Kolakowski |first=Nick |date=2022-12-08 |title=Which Programming Languages Are Growing? |url=https://www.dice.com/career-advice/which-programming-languages-are-growing |access-date=2023-06-10 |website=Dice Insights |language=en}}</ref><ref name=nytimes2023>{{Cite news |last=Singer |first=Natasha |date=2023-04-05 |title=For Lower-Income Students, Big Tech Internships Can Be Hard to Get |language=en |url=https://www.nytimes.com/2023/04/05/business/tech-internship-application-grind.html |access-date=2023-08-09 |quote=To gear up for the assessments, many students practice their skills on LeetCode, a free test prep site that offers coding and algorithmic problems, along with detailed solutions. The site also offers premium services. For $35 a month, it gives members access to specific problems that companies like Amazon, Google and Microsoft previously used — and some continue to use — to assess applicants. To keep the questions up-to-date, the test prep service said, it regularly surveys members applying for tech positions.}}</ref><ref name=dummies>{{Cite book |last=Sonmez |first=John |url=https://books.google.com/books?id=rEOvDwAAQBAJ&newbks=0&printsec=frontcover&pg=PA108&dq=LeetCode&hl=en |title=Programming Interviews For Dummies |last2=Butow |first2=Eric |date=2019-09-11 |publisher=John Wiley & Sons |isbn=978-1-119-56506-2 |language=en |quote=LeetCode is also a popular site for programmers who want to get up to speed.}}</ref><ref>{{Citation |last=Harper |first=Jocelyn |title=Interview Insight: How to Get the Job |date=2023 |url=https://doi.org/10.1007/978-1-4842-8783-5_4 |work=A Software Engineer’s Guide to Seniority: A Guide to Technical Leadership |pages=19–28 |editor-last=Harper |editor-first=Jocelyn |access-date=2023-08-11 |place=Berkeley, CA |publisher=Apress |language=en |doi=10.1007/978-1-4842-8783-5_4 |isbn=978-1-4842-8783-5 |quote=LeetCode is a platform that specializes in algorithm questions ranked from “Easy” to “Hard” based on the complexity of the subject and solution. They also have a forum where people share what interview questions they encountered in phone screens and on-site interviews to share with the larger public and to help software engineers prepare. I have been fortunate that the only time that I encountered a LeetCode problem during a screening process was for Amazon. ... On this last interviewing journey, I found myself enjoying practicing algorithm coding questions because I found alternative resources to LeetCode. }}</ref>
== Features ==
LeetCode offers both free and premium access options. While free users have access to a limited number of questions, premium users gain access to over 2500 algorithmically and user-generated questions. These questions are categorized into easy, medium, and hard difficulty levels, allowing users to select challenges based on their proficiency.<ref>{{Cite web |title=LeetCode - The World's Leading Online Programming Learning Platform |url=https://leetcode.com/ |access-date=2023-06-21 |website=leetcode.com}}</ref> Users can also tag questions to facilitate searchability and provide assistance to others in finding relevant practice problems. The performance of users' solutions is evaluated based on response speed and solution efficiency, and is ranked against other submissions in the LeetCode database.<ref>{{Cite web |last=Xing |first=Jessica |title=Here's what job seekers need to know about LeetCode, the coding-skills platform millions of developers use to ace the notoriously difficult technical interviews at firms such as Apple, Amazon, and Google |url=https://www.businessinsider.com/leetcode-coding-test-apple-amazon-google-technical-interview-prep-job-2021-11 |access-date=2023-06-21 |website=Business Insider |language=en-US}}</ref>
LeetCode supports multiple programming languages, including [[Java (programming language)|Java]], [[Python (programming language)|Python]], [[JavaScript]], and [[C (programming language)|C]].<ref>{{Cite journal |last=Nguyen |first=Nhan |last2=Nadi |first2=Sarah |date=2022-10-17 |title=An empirical evaluation of GitHub copilot's code suggestions |url=https://doi.org/10.1145/3524842.3528470 |journal=Proceedings of the 19th International Conference on Mining Software Repositories |series=MSR '22 |___location=New York, NY, USA |publisher=Association for Computing Machinery |pages=1–5 |doi=10.1145/3524842.3528470 |isbn=978-1-4503-9303-4 |quote=LeetCode questions come with test cases in various programming languages, ... (Python, Java, JavaScript, and C)|doi-access=free }}</ref>
== History ==
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