Sololearn help me?_________________________________________Why my C code is not working in Solo learn compiler?

Question

This code work on my pc but doesn't work in sololearn.
https://code.sololearn.com/cEPvdUqH9Vha/?ref=app

Answer 1

after added header file working but wrong.
can you make one. nd insert in it

Answer 2

@immortal bro but w/o work on my pc

Answer 3

https://code.sololearn.com/ciFzefH3gADP/?ref=app

Answer 4

ooh now its work.
i have to press enter to enter another number