Please help with Code Coach It’s a sign

Question

Problem description is here:
https://sololearn.com/coach/19/?ref=app

My code here:
https://code.sololearn.com/ce6kIehrjC7X/?ref=app

and test 3、5 failed
didn’t know why would it be, please help if you know, thanks!

Updated: I solved, thank anyway!!

Answer 1

This is a pro problem. Copy and paste the description here so that non pro users can help you too.

Answer 2

May it help you 😀

https://code.sololearn.com/cA1prUdD8v3x/?ref=app

Answer 3

Already done by c language, but thanks bro anyway :)

Answer 4

Hi sir, i solved, so never mind 🙂

Answer 5

Ok