Schools for Survival: All Schools Turn into Hell

[School Survival][Apocalypse][Small Group Portrait][Not Brainless][Not a Mary Sue][Semi-Infinite Flow][S-Rank Talent: Invisibility and Etherealization][Multiple]
Universities today are plagued by rampant formalism.
Gu Pingsheng originally wanted to help his advisor by getting a document stamped by Teacher Huang from the administration department, but Teacher Huang made various excuses to obstruct and even ridicule him.
During evening self-study time, schools worldwide enter a bizarre survival game where all teachers and students are equal, and everyone must complete a life-or-death assignment... Failure to finish the assignment means death...
Gu Pingsheng happened to become their new class monitor and awakened the S-level talent Hidden Void, which allows him to become invisible and ethereal, making him extremely effective at avoiding damage and preserving his life.
At the same time, the class monitor has a lot of power; they can choose, and even control, the lives and deaths of their classmates...
[Class monitor Gu Pingsheng, please select your class's homework for today.]
Homework 1: School beauty Lin Yao and Li Zhen engage in a life-or-death duel until one of them dies.
[Homework 2: Gu Pingsheng does ten push-ups.]
Which assignment should I choose for the class?