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Number theory Part-2

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Introduction Problems in competitive programming which involve Mathematics are are usually about number theory, or geometry. If you know number theory, that increases your ammo heavily in solving a lot of tougher problems, and helps you in getting a strong hold on a lot of other problems, too. Problems in competitive programming require insight, so just knowing some topics is not enough at all. All of the problems requires more or less math tough. For instance, solving large systems of equations and approximating solutions to differential equations.  Set Theory Before we proceed, let us get through the some common set operations. Q.) What is a Set? -In mathematics, a set is a collection of distinct objects, considered as an object in its own right. For example, the numbers 2, 4, and 6 are distinct objects when considered separately, but when they are considered collectively they form a single set of size three, written {2,4,6}. Sets are one of the most fundamental con...
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Packages in Java

Packages In Java Package  in  Java  is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for: Preventing naming conflicts. For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.Employee Making searching/locating and usage of classes, interfaces, enumerations and annotations easier Providing controlled access: protected and default have package level access control. A protected member is accessible by classes in the same package and its subclasses. A default member (without any access specifier) is accessible by classes in the same package only. Packages can be considered as data encapsulation (or data-hiding). All we need to do is put related classes into packages. After that we can simply write a import a class from existing packages and use it in our program. A packages is container of group of related classes where some of the classes are acces...
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DEPLOY YOUR STATIC WEBSITE ON HEROKU

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HOW TO DEPLOY YOUR STATIC WEBSITE ON HEROKU Before starting this tutorial I may first tell you what is “Heroku”? Heroku is a cloud platform service where we can easily upload our apps which support multiple programming languages. In the beginning heroku only supported Ruby language but after that it has given support for different languages like Php, Python, Node.js, Clojure, Scala and Go. Heroku uses git repositories to deploy apps on web. After deploying your app on heroku you will get a link which would be your application domain that would be like this: “ applicationname.herokuapp.com” In this tutorial I will teach you how to deploy your simple static Html, Css and JavaScript website or any other simple JavaScript application. What are Git and GitHub? To get started we must first know what Git is. Git is an open source version control system. Git is distributed revision control system which is very fast and lightweight tool. Git was developed by Lin...
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