Course Center
Systematic learning for informatics olympiad, from beginner to advanced
XiXi's Competitive Programming L1: Core Programming Thinking & C++ Fundamentals
16 lessons9 hours
CSP-J entry-level course covering GESP Levels 1–2. Master core programming thinking and C++ fundamentals.
XiXi's Competitive Programming L2: CSP-J Basic Algorithms & Data Structures
24 lessons16 hours
CSP-J foundational course covering GESP Levels 3–4. Learn basic algorithms and data structures.
XiXi's Competitive Programming L3: CSP-J Advanced Algorithms & Data Structures
54 lessons25 hours
CSP-J advanced course covering GESP Levels 5–8. In-depth study of advanced algorithms and data structures.
XiXi's Competitive Programming L4: CSP-S Senior Division Systematic Course
81 lessons31 hours
CSP-S/NOIP systematic course. Prepare for provincial competitions with mastery of graph theory, dynamic programming and other advanced algorithms.
CSP-J Preliminary Sprint
22 lessons5 hours
Comprehensive CSP-J preliminary exam preparation covering computer basics, data structures, algorithms, encoding and number theory