Bruh i so cooked at 10a challenge, but there a lot of reasons why we should ban of using phones (if it's obviously ain't a part of studying process ofc), starting from distraction from studying, ending risks to discipline and ethics (Phones are often used to cheat on exams or tests. There is also a risk that the camera will be used for bullying — for example, someone might film a compromising moment and publish it online) and psychological aspects (like phone addiction and other). So i think that i got unfair low rate in 10a but who cares -_- (right answer - no one, starting from host ending contestants)
Tip: just survive 2nd phase and 3rd phase is more easier than you think (in particular cuz of hearts, there was a lot of them.)
