Advice for a 7-Hour Marathon CTF: Transitioning from picoCTF

The poster, a 17-year-old competitor, is preparing for an international under-20 cybersecurity competition with a 7-hour daily format over two days. The challenges involve multiple subtasks (4-8) sharing the same codebase or binary, and pwn challenges are limited to x86_64. External monitors are prohibited, and AI use is restricted and monitored during the event. The poster has prior experience with picoCTF (150+ medium challenges) and won a silver medal at a similar event last year.