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This repository contains a subset of pointers to solutions with editorials and notes to my trainees (ACM ICPC, OJs, IOI, POI, CEOI, JOI, etc). For IOI/OI, I organized what I found on the web from official solutions and materials.

Teaching materials for a future Foundation of Embodied AI course, with Chinese and English tutorials on robot dynamics, Isaac Sim, Isaac Lab, MuJoCo, robot learning, ROS 2, camera calibration, PPO, SAC, Flow Matching, GR00T, and SONIC.

A collection of hash functions, ciphers, tools, libraries, and materials related to cryptography & security. :closed_lock_with_key::closed_lock_with_key::closed_lock_with_key::closed_lock_with_key::closed_lock_with_key: (project was renamed, libchaos is main)

Contains materials for my technical presentation exploring Linux malware tradecraft—from userland and fileless techniques to kernel rootkits, ftrace, eBPF, and defensive strategies.