Can anyone help me and tell me how is this code works?

Question

I just guessed the answer by just seeing the printf statement please explain it to me how the functions or data types are there in the function and also how the function declaration works here with those (...)
https://www.sololearn.com/post/98402/?ref=app
https://code.sololearn.com/cvZBK8gR8JGD/?ref=app

Answer 1

the code is totally wrong, let me just say incomplete, lots of functions are use which are not available in the question, it's better you report the question

Answer 2

Ok I'll report it