Hexlet Help Center

Codebattle is a competitive programming platform where two participants solve the same algorithmic task. The first person to submit a correct solution wins. A key feature is real-time visibility: participants can see their opponent's code as they write it.

Key features include:

• Difficulty Levels: 4 different levels of complexity.
• Opponents: Users can compete against other live players or practice against bots.
• Registration: Optional for playing, but required (via GitHub) to track progress, save results, and view personal statistics.

The Premium plan is designed for students seeking individual support and maximum immersion. Key educational benefits include:

• Dedicated Mentor: A practicing developer providing guidance, one-on-one communication, and technical expertise.
• Curator Support: Assistance with organizational matters.
• Peer Community: Access to chats with other students in the same profession.
• Portfolio Building: Large projects with mentor code reviews published on GitHub.
• Certification: Eligibility for a Hexlet certificate upon completion.
• Flexibility: A 1-month academic leave option and lifetime access to lesson theory and saved solutions.

The Group Advanced tariff is an archived learning plan (archived as of February 18, 2025) available only to students who previously purchased it. This tariff focuses on professional programs with support from a mentor and a curator. Key benefits include:

• Mentorship from practicing programmers and organizational support from a curator.
• Peer communication via group chats.
• Portfolio development through practical projects published on GitHub.
• Access to closed group webinars and Hexlet Career services for employment assistance.
• Opportunity to practice on Hexlet's commercial projects.
• A recognized Hexlet certificate upon completion.
• A 1-month academic leave option.
• Lifetime access to the theory and saved solutions of fully completed lessons (including theory, exercises, and tests).

The Standard (Old) plan is designed for self-directed learners starting from scratch. It focuses on independent study of professional tracks without constant mentor support, while providing expert review for final projects. Key features include:

• Practical Projects: Development of full applications or pages published on GitHub to build a professional portfolio.
• Mentor Reviews: Experienced developers conduct reviews of projects after they pass automated checks.
• Certification: A Hexlet certificate is awarded upon program completion.
• Curator Support: Assistance with organizational and administrative matters.
• Academic Leave: A one-month break option to pause studies without losing paid time.
• Lifetime Access: Permanent access to lesson theory and saved solutions after completing the program.

Foundational texts for understanding how computers and OS work:

• Computer Architecture: 'Code: The Hidden Language of Computer Hardware and Software' by Charles Petzold
• Operating Systems: 'UNIX Operating System' by Andrey Robachevsky, Sergey Nemnyugin, and Olga Stesik
• Operating Systems: 'Linux Administration Handbook' by Evi Nemeth, Garth Snyder, and Trent R. Hein

The Premium Subscription is a learning format centered around mentorship. Key benefits include:

• Dedicated Mentor: Access to a practicing programmer who provides guidance and shares industry experience throughout the course.
• Full Content Access: While the mentor focuses on a specific track, students get full access to all Hexlet materials, professions, and tracks for self-study.
• Portfolio Building: Completion of large projects with mentor code reviews, which are then published to GitHub to build a professional developer portfolio.