Math

• Rethink linear algebra
• Learn tensor algebra
• Kirchhoff’s matrix tree theorem ([Luogu 4336][lg4336])
• Trace of matrix (Problem J, 2019 ICPC Asia Regional Nanchang)

Physics

• Rethink dynamics

Computer Science & Engineering

• DSU on tree
• Translate LFS book
• Learn Rust
• Rebuild codebase for competitive programming

Project

XDOJ-4

• Fix the prototype
• Judging backend using systemd