algorithm - Multithreading Problem - Not understanding how the concept of printf implemented in concurrency

Question

Im struggling a problem in multithreading which I have two threads running over one printf ; and I don't know how exactly those four cases that's already explained in that video are correct?! could anyone please illustrate more about them? appreciated for any help to understand why what's explained here to that problem is correct ! I'm attaching down the video of the problem: enter link description here

Appreciated for any help for how those 4 cases of the problem are correct .

question from:https://stackoverflow.com/questions/65835801/multithreading-problem-not-understanding-how-the-concept-of-printf-implemented

Answer 1

Waitting for answers