This repository is a comprehensive educational collection of algorithm problem solutions for LeetCode and Kamacoder (ACM mode), organized as a structured learning path for interview preparation. It contains over 350 Markdown files, each providing a detailed explanation, multiple solution approaches, and code in C++, Java, Python, Go, JavaScript, and many other languages. The content is purely pedagogical and static—not a runnable application or a data pipeline. It serves as the online companion to the '代码随想录' (programmercarl.com) book and video series. The repository demonstrates high consistency in formatting and pedagogical templates, but it is not software engineering; the 'craftsmanship' lies in the educational structure rather than in software architecture. It is hybrid in the sense that some files include empirical complexity analysis, but the dominant character is an educational resource.