Couldn't understand "not" bitwise operator!😞

Question

https://www.sololearn.com/learn/4076/?ref=app
I have read the comments too!
But still couldn't understand where to put -ve and where to put +ve numbers!
I can understand the other operators but not this one!🙁

Answer 1

What exactly you don't understand?
I suppose you don't get how negative numbers are written in binary.
I hope Kartik Krishnan's answer is going to help you:
https://www.sololearn.com/Discuss/1789256/?ref=app