Ari  Bogisich

Ari Bogisich

1598672580

N-Queens problem using backtracking in Java/C++

N Queen Problem Using Backtracking

If you love playing chess, you’ll enjoy learning about the N-queens problem. It is a good problem to understand backtracking.

What is Backtracking?

In backtracking, we start with one pos­si­ble move out of many avail­able moves. We then try to solve the prob­lem.

If we are able to solve the prob­lem with the selected move then we will print the solu­tion. Else we will back­track and select some other move and try to solve it.

If none of the moves works out we claim that there is no solu­tion for the problem.

What is the N-Queens Problem?

How can N queens be placed on an NxN chessboard so that no two of them attack each other?

This problem is commonly seen for N=4 and N=8.

Let’s look at an example where N=4

Before solving the problem, you need to know about the movement of the queen in chess.

A queen can move any number of steps in any direction. The only constraint is that it can’t change its direction while it’s moving.

One thing that is clear by looking at the queen’s movement is that no two queens can be in the same row or column.

That allows us to place only one queen in each row and each column.

When N=4, the solution looks like :

Queen Solution

Queen Solution

But how do we get this arrangement?

#data structure and algorithms #c++ #java #cplusplus #programming-c

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Buddha Community

N-Queens problem using backtracking in Java/C++
Tyrique  Littel

Tyrique Littel

1600135200

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Ari  Bogisich

Ari Bogisich

1598672580

N-Queens problem using backtracking in Java/C++

N Queen Problem Using Backtracking

If you love playing chess, you’ll enjoy learning about the N-queens problem. It is a good problem to understand backtracking.

What is Backtracking?

In backtracking, we start with one pos­si­ble move out of many avail­able moves. We then try to solve the prob­lem.

If we are able to solve the prob­lem with the selected move then we will print the solu­tion. Else we will back­track and select some other move and try to solve it.

If none of the moves works out we claim that there is no solu­tion for the problem.

What is the N-Queens Problem?

How can N queens be placed on an NxN chessboard so that no two of them attack each other?

This problem is commonly seen for N=4 and N=8.

Let’s look at an example where N=4

Before solving the problem, you need to know about the movement of the queen in chess.

A queen can move any number of steps in any direction. The only constraint is that it can’t change its direction while it’s moving.

One thing that is clear by looking at the queen’s movement is that no two queens can be in the same row or column.

That allows us to place only one queen in each row and each column.

When N=4, the solution looks like :

Queen Solution

Queen Solution

But how do we get this arrangement?

#data structure and algorithms #c++ #java #cplusplus #programming-c

Lina  Biyinzika

Lina Biyinzika

1620291060

C++ Vs Java: Difference Between C++ & Java [2021]

Object-oriented programming (OOP) is a computer programming principle that focuses on building the software design around “objects” instead of logic or function. An object refers to a data field possessing unique attributes (characteristics). Essentially, OOP places more emphasis on the manipulation of objects rather than the logic behind the manipulation.

Even though C++ and Java are both object-oriented programming languages, they are quite different from each other. For instance, C++ draws inspiration heavily from the C programming language and is designed for system development. However, Java is based on a secure and portable virtual machine and is explicitly built for application programming and network computing.

In this blog, we’ll dive deeper into the C++ vs. Java debate and learn more about the difference between C++ and Java.

#c++ #c++ vs java #comparison #difference between c++ and java #java

Tamale  Moses

Tamale Moses

1619519880

C++ Vs Java: Difference Between C++ & Java [2021]

Object-oriented programming (OOP) is a computer programming principle that focuses on building the software design around “objects” instead of logic or function. An object refers to a data field possessing unique attributes (characteristics). Essentially, OOP places more emphasis on the manipulation of objects rather than the logic behind the manipulation.

Even though C++ and Java are both object-oriented programming languages, they are quite different from each other. For instance, C++ draws inspiration heavily from the C programming language and is designed for system development. However, Java is based on a secure and portable virtual machine and is explicitly built for application programming and network computing.

In this blog, we’ll dive deeper into the C++ vs. Java debate and learn more about the difference between C++ and Java.

#full stack development #c++ #c++ vs java #comparison #difference between c++ and java #java

Samanta  Moore

Samanta Moore

1620458875

Going Beyond Java 8: Local Variable Type Inference (var) - DZone Java

According to some surveys, such as JetBrains’s great survey, Java 8 is currently the most used version of Java, despite being a 2014 release.

What you are reading is one in a series of articles titled ‘Going beyond Java 8,’ inspired by the contents of my book, Java for Aliens. These articles will guide you step-by-step through the most important features introduced to the language, starting from version 9. The aim is to make you aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will talk about the most important new feature introduced with Java 10. Officially called local variable type inference, this feature is better known as the **introduction of the word **var. Despite the complicated name, it is actually quite a simple feature to use. However, some observations need to be made before we can see the impact that the introduction of the word var has on other pre-existing characteristics.

#java #java 11 #java 10 #java 12 #var #java 14 #java 13 #java 15 #verbosity