OI Wiki

OI Wiki is a free, open, continuously updated knowledge resource for people learning and practicing competitive programming. Inspired by CTF Wiki, the project brings together foundational concepts, problem-solving techniques, competition guidance, and practical tools to help enthusiasts study more efficiently and in greater depth. Its material covers both informatics olympiads and university programming contests, including OI and ICPC/CCPC formats, learning resources, common problem types, and contest strategies.

The wiki offers extensive tutorials on programming languages, with a strong focus on C++, alongside introductory and advanced material for Python, Java, and Pascal-to-C++ conversion. Its algorithm and theory topics include dynamic programming, strings, mathematics, data structures, graph theory, computational geometry, and offline methods. Readers can also explore editors, compilers, debugging and judging tools, Git, LaTeX, and libraries used in contest programming. Organized into searchable sections and maintained through community contributions on GitHub, OI Wiki serves as a collaborative reference for learners seeking clear explanations and a broad, practical overview of the field.