Competitive Programming 4: The Lower Bound of Programming Contests in the 2020s (Book 1: Chapters 1–4) is a comprehensive algorithmic handbook authored by Steven Halim, Felix Halim, and Suhendry Effendy. Specifically designed as an essential training guide for International Olympiad in Informatics (IOI) contestants, ICPC participants, and software engineering candidates, this volume covers fo…
"Sara Dixon, Teen Detective" is a contemporary mystery novel designed for intermediate English language learners. The story follows Sara Dixon, an observant teenager who finds herself entangled in a real-life investigation when strange events begin occurring in her neighborhood. Unlike traditional detective stories, this narrative focuses on a modern youth perspective, highlighting how curiosit…