Chat server java gui jobs

I'm seeking assistance with an urgent issue that's emerged with my softphone engine. - **Operating System**: My system is running on Windows. - **Programmin...issue that's emerged with my softphone engine. - **Operating System**: My system is running on Windows. - **Programming Language**: Unfortunately, the programming language of my softphone engine has been omitted. I believe it may be C#, Java, or C++. It's imperative that the freelancer is comfortable with these languages to handle the issue. - **Timeline**: I'm in need of immediate assistance to solve this problem. Ideal candidates should be able to troubleshoot softphone issues and have experience with Windows software development. Experience with C#, Java, and C++ is a plus. The ability to...

...including ID cards, receipts, invoices, paper, and passport photos, and saving them in JPEG format. As such, the app should be able to: - Recognize and accurately scan ID cards, receipts, invoices, paper, and passport photos - Provide a seamless and user-friendly experience for scanning documents - Showing Auto or Manual Edge Cropping, Image Rotation - Using OpenCV - Native Android (Android Studio), Java I would like the app to be specifically tailored for Android, ensuring a smooth user experience and a clean, intuitive interface. Ideal Skills and Experience: - Proficiency in Android development - Experience in developing document scanning apps - Familiarity with image recognition and processing - Ability to create a simple and user-friendly interface - Knowledge of saving...

I'm seeking a skilled REDM game developer, who takes a particular interest in creating a Roleplay server on the REDM network. Expertise in developing game mechanics are key for this project. The primary task involves: - Developing a Roleplay server game. - Incorporating customizable characters, multiplayer functionality, and an in-game economy system. A successful freelancer will have a good understanding of how to create immersive and engaging Roleplay environments, and experience in implementing character customization options, multiplayer functions and economy system into such a game. Candidate should possess expertise in REDM server game development and game design principles. A proven track record in similar projects will be advantageous.

I'm in need of an experienced individual to migrate my current Moodle site from a shared server to a dedicated server. This move is primarily to prepare for an expected increase in traffic, and I'm looking for someone who can not only handle the technical aspects of this migration but can also help with optimizing the server for improved performance. Key Requirements: - Expertise in server migration, specifically Moodle - Ability to create a custom configuration for performance optimization - Prior experience in handling increased traffic on a dedicated server Please only apply if you have experience with Moodle and can guarantee a smooth migration process.

I'm looking for a skilled AWS expert to help me set up a highly performant proxy server that can support multiple protocols. Key requirements include: - Setting up the proxy server in AWS - Configuring elastic IPs for the proxy server - Ensuring it runs at an optimal performance level - Supporting multiple protocols The proxy server should be designed to accommodate a high volume of traffic and provide a seamless, fast browsing experience. Ideal candidates should have: - Extensive experience with AWS services - Proficiency in configuring and managing proxy servers - A strong understanding of networking and server optimization Please bid with a clear outline of how you plan to approach this project, including any relevant experience you have that...

I'm offering $1000 ($500 upfront before doing anything as long as you've shown up skill, downloaded everything setup in emulator, tested, and ready to go and can do)) right now to anyone who can build me gui ff4: PSP mod tool. I've already decrypted (executable eboot; its ELF executable (PSP) MIPS; know that first), dumped data from the PSP game's UMD disc, unpacked all data archives and decompressed every single file and manually sorted file structure according to how the game reads it: I've also got documentation/know what files relate to in-game, so no need to worry on researching that, just ask. Using PPSSPP emulator to test

I require a skilled Linux administrator to assist setting up a server on my local machine. I currently have a domain, cloudflare, WSL, ubuntu, ollama and ollama webui. I'm getting stuck on connecting my domain through cloudflare tunnel to my linux server so that I can access ollama's webui remotely. Key Responsibilities: - Install and configure Linux server for accessing the Cloudflare tunnel website - Ensure the server is optimally configured for devices outside the network Ideal Skills: - Proficient in Linux server setup and administration - Experience with Cloudflare tunnel configurations - Knowledgeable about server configuration for network accessibility - Background in IT security to ensure secure network access. -Experience with...

I have a source code for android video streaming app in java, xml, and i need to change the design of the app frontend I am looking for someone who can make changes to android app code design and recreate the frontend. below i have attached the design of my app, and want to reformat it according to zee5 app design. If you feel its a good fit for you, i welcome your bid. thanks.

Overview: We are looking for an experienced Java developer to refactor an existing code base to incorporate several design patterns and improve overall code quality. This project involves enhancing the structure and maintainability of the code by integrating various design patterns, such as Dependency Injection (DI) using Google Guice, Listener, Builder, Singleton, and, optionally, Factory design patterns. The ideal candidate should understand these patterns strongly and have experience refactoring legacy code. Key Responsibilities: 1. Refactor Service Classes with DI Pattern: - Utilize Google Guice API to implement Dependency Injection across all service classes. - Ensure that all dependencies are injected and managed by the Guice framework. 2. Apply Listener Design Pattern...

I'm looking for an experienced and knowledgeable SQL Server professional who can help me resolve a connection issue I'm experiencing. - **Connection Method**: I'm currently using Windows Authentication to connect to the SQL Server. - **SQL Server Version**: I'm using SQL Server Management Studio 20. - **Error Message**: When trying to connect, I receive an error message indicating that the connection has failed. Ideal candidates for this project should have: - Extensive experience with SQL Server, particularly with the version I'm using. - Proficiency in troubleshooting connection issues. - Strong communication skills to guide me through the resolution process.

I'm seeking a professional to help set up a Windows-based server using virtual machines for the purpose of managing remote profiles. Key requirements: - Proficiency in setting up and configuring Windows Operating Systems - Experience in creating and managing Virtual Machines, particularly in a VPS environment - Prior work in server configurations and network management The ideal candidate will be able to work efficiently, communicate effectively, and provide guidance on scalability and security for the server setup.

...experienced Java developer who can integrate a cloud-based database into my project. Ideal Skills: - Strong proficiency in Java - Prior experience with database integration - Specifically, experience with cloud-based databases, Microsoft Azure in particular, is a big plus The Project: - Your primary task will be to integrate Microsoft Azure, a cloud-based database, into an existing Java project. - The project already has a well-defined structure and the database will serve as a key component. - The database integration should be secure, efficient, and scalable, meeting the highest standards. - There will be no need for user authentication or API integration, as this project is solely focused on database integration. Please only apply if you have good experienc...

Hello, I would like to hire someone who can create a complete discord server, with bot design, channels, etc.

I'm requiring a proficient Java developer for a college project. The main task will be building a web application along with database integration. I'll need you to implement vital functionalities, such as: - A user registration panel - A user login page - Fee structure - Contact us section - Admin as well as user registration option - Subjects and courses - Basic website navigation functions For the front end, HTML and CSS skills are necessary to render a clean and minimalist design. It's vital you're experienced in these domains and can provide examples of your past work. Looking forward to your proposals.

As someone who values efficient and cost-effective operations, I'm intent on leveraging the full potential of my Microsoft SQL Server database. The core of this project involves enhancing performance and decreasing cost. To enrich the function of my database, I'll need an expert who can: - Improve overall performance, guaranteeing smoother, faster operations - Implement strategies for cost reduction without compromising quality and performance The ideal freelancer will be someone with extensive experience in Microsoft SQL Server, superb knowledge in database performance enhancement, and proven strategies for cost-reduction. If you can deliver this, you'd be the perfect fit.

...have 2 chapters to finish. in those 2 chapters i need your help on coding. my subject being the digitization of the conversation between a person with hearing loss and a doctor. my desire from you is to program my java application itself as long as you can, it doesn't have to be complete finished. the application has the idea of ​​how you enter it, it puts you in a picture interface, the deaf-mute person does his sign language, and the translation appears below. if you can help me with explanations and about which package to buy from you that would be perfect, thanks! 1) Set up the Java project and the necessary libraries for computer vision and machine learning. 2) Capture video input from a camera. 3) Pre-process the video frames to enhance th quality and reduce no...

I'm in need of an Android developer with experience in Java and Kotlin who can handle issues with fingerprint scanner devices like Futronics FS80H and Mantra MFS100 on Android 14. Key Responsibilities: - Diagnose and resolve compatibility issues with the latest Android 14 version. - Ensure the scanner can correctly detect fingerprints. - Ensure the scanner is responsive and functions as expected. Ideal candidates should have: - Proven experience working with fingerprint scanner devices. - Expertise in Java and Kotlin for Android development. - Strong knowledge of Android 14 and its compatibility requirements. - A track record of troubleshooting and resolving technical issues. This is an urgent project, and I'm seeking someone who can deliver results promptly and ...

We are seeking an experienced full stack developer proficient in Angular, Typescript, Java, and Spring to join our team for an exciting HR Tech project. This project aims to streamline the onboarding process for candidates while enhancing the efficiency of recruitment for companies. Key Features: 1. Onboarding Process: The platform will feature a comprehensive onboarding process for candidates, designed to facilitate a smooth transition into their new roles. This process will consist of four main steps: - Technical Quiz: Candidates will undergo a technical quiz to assess their domain-specific knowledge and skills. - Audio Recording: Candidates will be prompted to record audio responses to predetermined questions, allowing recruiters to gauge communication skills and confidence. -...

I'm in search of a skilled automation tester who has ample experience with Java. My project involves developing a new module that requires comprehensive functional testing. Use Frame work is POM Key Responsibilities: - Implement, design, and create functional test automation frameworks with Java - Thoroughly perform functional testing on new modules Ideal Skills and Experience: - Proficient in Java - Extensive experience in functional testing - Familiarity with Selenium Preference will be given to those who can demonstrate specific experience with using Selenium for automation testing in Java. Remember, quality is crucial. I'm not looking for rushed testing, but a methodical and precise approach. Get in touch. link of implementation :

I'm looking to expand my current portfolio and am interested in purchasing Java-based apps that are already on the Google Play Store. The types of apps I'm particularly involved in include games, utilities, and productivity software. - Types of Apps: Games, Utilities, Productivity - Type of Purchase: Both Individual apps and app bundles are welcomed. - Programming Language: Java-based apps only. For this project, an ideal freelancer would be proficient in app development using Java and has direct experience in uploading and maintaining apps on the Google Play Store. Any freelancers who already have ready-apps that meet the criteria would be preferred. Please include screenshots or links to your app/s available on the Play Store, along with your bid. Let&...

...experienced Netapp server hardware engineer to help me with troubleshooting, configuring, and installing server components. Key Tasks: - Troubleshoot hardware issues: The server is experiencing hard disk and motherboard failure, leading to performance issues and potential data loss. The ideal candidate will be proficient in diagnosing and resolving these hardware problems promptly. - Configuring Netapp server: I require assistance with configuring the server to ensure optimal performance and security. Proficiency with Netapp server setup and configuration is a must. - Installing server components: The successful candidate will also be responsible for installing new hardware components to replace those that have failed. Ideal Candidate:...

I'm looking to have a chat feature added to my online tutoring platform to facilitate both one-on-one and group conversations between tutors and students. The primary purpose of this chat function is for instant messaging. Key Features Needed: - Instant Messaging: A real-time chat functionality that allows tutors and students to communicate seamlessly. - Group Conversations: The chat should support group conversations as well as one-on-one chats. - Message Read Receipts: The ability for users to know if their message has been read by the recipient. - Typing Indicators: This feature will show when the other person is typing to enhance real-time communication. - Offline Messaging Capability: The chat should allow users to send messages even when the r...

I'm in immediate need of a DNS server implementation using UDP sockets in Go. The primary purpose of this server is to resolve domain names to IP addresses within the shortest possible time frame. Key Requirements: - Implementation of a DNS server in Go - Utilization of UDP sockets for communication - Support for resolving domain names to IP addresses - Ability to run on multiple platforms, including Windows, Linux, and macOS Ideally, I'm looking for a freelancer with: - Proven experience in developing DNS servers - Proficiency in Go programming language - Strong understanding of UDP sockets - Ability to ensure cross-platform compatibility - Immediate availability to complete the project ASAP Please provide a brief overview of your relevant experience, you...

NOTE : this is for futures .. max budget is $300 *** please submit, only if you have worked on BOT projects for crypto exchange*** I'm seeking a skilled developer to create an automated trading system that can...require seamless integration with the MEXC platform. Skills and Experience Required: - Strong knowledge of algorithmic trading and cryptocurrency markets - Proficiency in building automated trading systems, particularly on the MEXC platform - Experience in developing and implementing trading strategies - Understanding of real-time market data analysis - Proficiency in coding languages such as Python, Java, or C++ Please only apply if you have a proven track record in building similar systems and are able to deliver a reliable and effective trading bot for the MEXC ...

I'm looking for a skilled and experienced freelancer to help me with a mobile app project that comprises both UI/UX design and Java Backend development. Key Requirements: - Proficient in UI Design: You'll need to create a sleek, intuitive, and user-friendly interface for a mobile platform. - Java Backend Development: The app needs to have a robust and efficient Java backend that can handle the expected load and ensure seamless functionality. - Mobile Platform Experience: You should be well-versed in mobile app development, ensuring the final product is optimized for mobile use. Specific Features: - User Authentication: The app will need a secure and reliable user authentication system. - In-App Purchases: You'll need to implement an in-app purchase sy...

I'm in need of a Figma designer to create a chat room that is specifically tailored for mobile use. The primary aim of this chat room is to facilitate social interaction amongst users. Key Features: - Photo and video sharing capabilities - Integration of emojis, stickers and gifs Ideal candidates for this project should have: - Proficiency in Figma and mobile design - A strong background in user experience and user interface design - Previous experience with chat room applications would be a plus The final design should be intuitive, engaging, and optimized for smooth operation on both iOS and Android devices. If this project aligns with your expertise, I'd be keen to hear from you.

I'm looking for an experienced Android developer to create an app that focuses on e-commerce and product management. Key Features: - Social Media I...that focuses on e-commerce and product management. Key Features: - Social Media Integration: The app needs to connect seamlessly with social media platforms. User Authentication: - The app should have a user authentication system. Users should be able to log in or sign up through their social media accounts. And google account Ideal Skills and Experience: - Proficient in Android development (java) - Experienced in integrating social media APIs. - Familiar with user authentication systems, especially social media login. google login Please include samples of your past work that demonstrate your experience with similar projec...

The program needs to present a suitable interface (menu/form/web app depending on your chosen programming language) where staff can: 1. Enter Daily Hours Worked 2. Produce Hours Worked Report 3. Quit/Close/Exit the Program Program Functionality a) For Option [1] Enter Daily Hours Worked, your program must request and process data for all seven (7) employees. For each employee record, your program must ask for: • The Current Working Week Number • Employee ID • Employee Name • The hours worked from home for the 5 working days Monday – Friday. For this, create a data structure, Data Structure 1, such as a single dimensional array (or similar) to store the hours worked for each day of the week. For example: Data Structure 1 – This stores the hours worked each d...

I'm in search of talented coders with a passion, education (may be self or collage etc.) with expertise in Python, Java, and C++ to help me develop a new software application for Windows. Key Project Details: - Programming Languages: Proficiency in Python, Java, and HTML is essential for this role. Your role will involve: - Working on the software development process from conception to final testing and deployment. - Ensuring that the application is optimized for all users and clients, considering the specific requirements and features of this platform. Ideal Skills and Experience: - Strong programming skills in Python, Java, and C++. - Proficiency in developing software applications for Windows. - Experience in creating software from scratch. Looking forward ...

I am working on a compiler construction project using ANTLR4+Java (using visitors to walk the abstract syntax tree and visit key nodes), and I need help with semantic analysis.

I'm seeking a proficient software engineer adept at Java, Python, and C++, who will assist me in website development. The core assignment entails creating a program specifically for WordPress, my preferred CMS. Ideal Skills and Experience: - Comprehensive Java, Python, and C++ knowledge - Previous experience with website development - Proficiency in WordPress CMS Your role will focus on developing a program tailored to my needs, emphasizing functionality and integration within the WordPress platform. It's essential to have a hands-on approach, be detail-oriented, and dedication to creating high-quality, reliable software. Applicants should show a portfolio or examples of previous related work. This will aid in understanding your process, style and skills that can ...

In this project, will be developing an code to sense, share and control another application on a nearby node. The application can be mobile, web or desktop. The application is required to: 1. Sense a nearby node. When a node comes within the communication range and also when it moves out from this ...developing an code to sense, share and control another application on a nearby node. The application can be mobile, web or desktop. The application is required to: 1. Sense a nearby node. When a node comes within the communication range and also when it moves out from this range. An indication should be there when a node is sensed or moved away. 2. Share some content. It can be some message, file, chat etc. 3. Control minimum one feature of the remote node e.g., volume, brightness, wall...

We are seeking a skilled freelancer to develop an OIDC (OpenID Connect) server capable of delegating authentication to a CAS (Central Authentication Service) server. The OIDC implementation will be based on IdentityServer4. The primary objective is to establish a secure and efficient authentication mechanism within our system, leveraging the capabilities of both OIDC and CAS protocols. The ideal candidate should possess expertise in IdentityServer4 and have experience in integrating it with external authentication providers such as CAS. Additionally, familiarity with authentication protocols and best practices in web security is highly desirable.

...filtering of the list of processes. 5. Detailed view of specific process information. 6. Temporary storage of uploaded files in the browser. 7. Functionality to delete data being processed and start a new analysis. 8. Automatic process to delete old records from the database. 9. Recording of deletions for audit and regulatory compliance purposes. Technical Requirements: - Development in Java, NodeJs, or Python languages. - Implementation of API for file processing and database access. - Data storage in a database. - Data security and encryption. Expected Deliverables: - Complete development of the Colombia Rama Judicial file analysis system. - Implementation of user interface and specified functionalities. - Exhaustive testing to ensure the quality and accuracy...

...results were obtained, or if the source was unavailable. 5. Executor Function: There should be a function that executes all the sources that were queried and returns a PDF file as in Annex 1. Technical Requirements: • Experience in the development of automated query systems and data processing from external sources. • Knowledge in APIs, web scraping, and web page reengineering processes. Must use Java, NodeJs, or Python. • Ability to structure data efficiently and accurately. • Ability to generate detailed logs of queries and results. • The solution must include the necessary files and documentation to deploy each connector or integrator separately as AWS Lambda functions, Docker containers, or any Serverless service in AWS or GCP. Expected Deliverable...

I am in search of a...vary from website development to application development and data analysis. I need a versatile individual who can adapt to different project requirements and deliver high-quality results. The key functionalities and features required for these tasks may include user authentication, database integration, and payment processing. Ideal candidates should possess: - Strong coding skills in Python, Java, and JavaScript - Experience in website development, application development, and data analysis - Proficiency in user authentication, database integration, and payment processing - Ability to deliver high-quality results within the stipulated timeframes If you are a professional coder with the required skills and experience, I'd be happy to discuss further de...

I am in need of an Android app developer to create a minimalist style application. There will be no need for incorporating in-app purchases. This is a university project, but due to busy schedule I couldn't complete it. I have a deadline until 2 weeks(May 27 2024). The users of the app are Students and recruiters. It needs to be developed from Java language and Firebase as data base language(recommended) for storing any data. The app should only have following features, and no other graphics or extra designing is required. students can:  Browse and search for job opportunities posted by various companies.  Apply for jobs and upload their resumes and other documents.  Schedule and attend online interviews and tests.  Track their application status and receive feedbac...

I am seeking a skilled programmer who can create an intelligent BOT that's able to traverse my google spreadsheet and scrutinize incoming leads based on their EPC status. The main functionalities requir...simultaneously check their EPC statuses. - Highlighting Matches: In case a lead matches the EPC status I am in search for, the BOT should distinctly highlight the respective row in the spreadsheet. - Segregating Non-Matches: The BOT should be capable of moving the leads that do not match the desired EPC status to a separate section in the spreadsheet. Ideal skills for this job would be advanced Python or Java programming capabilities, extensive experience with google spreadsheets, and familiarity with EPC checks. A structured and methodical approach to problem-solving is ...

I'm looking for an experienced system administrator who can help with setting up an SSL certificate on my Ubuntu Apache web server. This task will require a good understanding of web server security, Apache, and Ubuntu operating systems. Key tasks will involve: - Validating the pre-existing SSL certificate - Configuring Apache to work with SSL - Testing the certificate to ensure it's working perfectly Users should have: - Extensive experience with Linux, specifically Ubuntu - Experience in web server security - Proficiency with Apache server setup - Familiarity with SSL installation and configuration

I need a seasoned Java developer with a strong background in utilizing NetBeans 8.1 and Derby Database. The primary task would be to improve the performance of an existing Java application. Key Requirements: - Expertise in Java and NetBeans 8.1 is essential. - Familiarity with Derby Database and how to optimize its use. - Proven track record in enhancing application performance. - Ability to identify and address performance bottlenecks in the system. Performance Improvement: - The main area of improvement is managing data processing speed. - Analyze the application for possible performance improvements and suggest appropriate solutions. Please note, the client has not specified details about user interface responsiveness or server-side operations. Thus, the...

I'm looking for an experienced coder in Java programming language for my institute who can teach students Java from basic to advance level. Key Requirements: - Proficiency in Java programming - Experience in developing software projects - Knowledge of coding practices and methodologies - Solid understanding and application of algorithm design Your role will be to teach students Java and make them proficient to build projects. This is going to be an offline projects in Nagpur, Maharashtra. Please include in your bid any relevant experience you have in developing software prototypes in Java.

I am in need of an experienced app developer to create an Android educational app with user acco...to make learning content engaging and interactive on a mobile platform. - User accounts are a key part of this project, as I want users to have personalized experiences and be able to track their progress. You should be able to design and implement a user account system with profiles and login functionalities. - Experience with Android app development is essential. You should be comfortable with Java and/or Kotlin, as well as the Android SDK. A good understanding of Material Design principles will be a big plus. Please provide examples of previous apps you've developed, especially if they are educational. Your ability to create a user-friendly interface and a smooth user experie...

Need some to program me a small function in this sdk to add RFID verification & then open gate for the user using following SDK.

Hello, I'm looking for a programmer for my project. C++ and possibly Java experience. I have already programmed my idea as a demo version in HTML on my website, now I need someone to implement it as software. In the future, the whole thing will be programmed on a screen including a touch screen, so that we have a finished device including a screen and buttons. Since this is a prototype and I need more versions, a permanent collaboration would be possible. I look forward to your offers. Best regards

I'm in urgent need of a Microsoft Azure expert who can assist with designing, deploying, and managing our Azure infrastructure. The tasks involved are crucial and require an experienced professional who can handle them with efficiency and accuracy. Key Responsibilities: - Designing Azure infrastructure: This involves creating a blueprint of the entire setup including virtual machines, storage accounts, virtual networks, and other resources. - Deploying Azure infrastructure: Once the design is finalized, the admin will be responsible for implementing the infrastructure based on the design. - Managing Azure infrastructure: After successful deployment, continuous management is required to ensure everything runs smoothly. The admin should be able to troubleshoot issues, optimize perfo...

I'm seeking an experienced full stack Java developer to help enhance an existing application. This project requires a professional with a diverse skill set across front-end, back-end development, and database management. Key Responsibilities: - Enhance the application with new features and improvements - Optimize front-end elements for maximum speed and scalability - Design and implement secure, efficient, and scalable back-end solutions - Ensure the application's database is well-managed and optimized - Participate in the development of healthcare/business related applications. - Work with Product Owners and teams to drive features and specifications, architecture design, implementation, and other software development responsibilities. - Works closely with in-house UX te...

...Openswoole developer to create a live chat system with specific functionalities. The main aspects of this project include: - Real-time Communication: The core of this project is to develop a live chat system utilizing Openswoole to ensure seamless and real-time communication between users. - Platform Compatibility: The widget needs to be compatible with WordPress, Shopify, and Wix. - Easy Embedding: The widget should be easily embeddable on various websites to ensure a smooth integration process. - Customizable Design: I require the widget to be customizable. - Key Functionalities: The live chat feature should include file sharing and chat history. The ideal candidate for this project should have strong expertise in Openswoole, PHP, and live chat ...

I'm searching for a skilled development team...Live Betting: The website should offer live betting options. Users should be able to place bets while games are ongoing. - The live betting functionality should be seamless, with minimal lag, to ensure the best possible user experience. Ideal Skills and Experience: - Prior experience in developing betting websites is highly desirable. - Proficiency in relevant programming languages like Python, Java, or PHP. - Good understanding of web security practices and measures. - Experience in creating user-friendly interfaces for online platforms. Please note, the project does not currently require support for casino games or fantasy sports, though the flexibility to add these features in the future would be beneficial. Reference - D...

Want to setup one aws - subdomain for nodejs api to run - 2 public html domain website - install free ssl - provide proper ftp, putty access and ensure proper security to be taken care - Need to ensure no further issue come Only apply if you ok with 600 INR. and also in future ready to work on same price for 1 VPS setup work

I'm seeking a skillful programmer to develop a comprehensive Data Encryption Standard program using Java. Key Project Details: - The program should strictly adhere to the Data Encryption Standard algorithm.