Answer 1

You must have copied that code from browser or other apps, the code contains characters not compatible with the compiler, so it failed to compile your code. It took me time cleaning up the invalid characters off your code, next time be careful about pasting code, check if there's invalid characters in it, anyway, here's the "cleaned-up" code.

https://code.sololearn.com/ctCLa63ckISZ/?ref=app