CStudy Privacy Policy

This Privacy Policy explains how CStudy (哒哒算法岛), an interactive C++ algorithm learning and competition practice web platform, handles learning data, code evaluation, and mistake exports.

1. Learning Data and Course Progress

CStudy delivers interactive animation courseware and question sets. As you explore algorithms and complete micro-lessons, your course completion markers, quiz answers, and recommended question progression are recorded to ensure continuous study flow. These records are used strictly for learning tracking and progress resumption.

2. Online Judge and Code Execution

When you submit C++ code for programming problems, your code is transmitted over HTTPS to our isolated evaluation judge service. The judge compiles and runs your code within a secure, resource-limited sandbox against test point datasets to return verdict statuses (such as AC, WA, TLE, RE, CE), memory usage, and execution timing. Source code is stored solely for code review, history inspection, and rejudging services.

3. Mistake Notebook and PDF Document Generation

Questions answered incorrectly and manually favorited items are organized into your personalized mistake notebook. When generating printable PDF worksheets, your selected mistake questions are processed by our server-side layout renderer to format print-ready A4 documents. PDF export files are kept temporarily for your download and automatically rotated.

4. Account Management and Role Separation

The platform supports student learning and optional parent monitoring roles. Account authentication relies on standard token verification. Sensitive credentials are encrypted, and we do not sell or disclose student performance or parent contact details to third-party advertisers.

5. Security, Support, and Inquiries

We do not embed third-party advertising tracking scripts or behavioral ad networks. If you require assistance or have inquiries regarding your account data, please contact our support team at support@yybit.cn. This policy will be updated as new learning modules and platform capabilities launch.