December 2025 recap focusing on documentation quality improvements in OI-wiki. Implemented a targeted fix to explicitly declare array types in examples, enhancing clarity and correctness for learners and contributors. The change is isolated to documentation (docs) and does not affect runtime behavior, but it strengthens the repository's documentation standards and reduces potential confusion.

Concise monthly summary for 2025-11 highlighting key features delivered, major bug fixes, impact, and technologies demonstrated. Primary work: update Winter Camp (WC) and China Team Selection (CTS) documentation to reflect new China Team Training (CTT) details and revised selection criteria for national candidates, with related code-review and commit activity.