I need help, please tell me why this programme won't work

Question

https://code.sololearn.com/cRyUUPsQVf5w/?ref=app

Answer 1

There are invisible characters present in the code.
If you copied and pasted this code from another source this can occur.

Try typing the code out instead in a fresh save

Answer 2

that's what I thought too, I tried it again (the code was written all by myself) but it still doesn't work
https://code.sololearn.com/c1zCAZpgex3O/?ref=app

Answer 3

u need help??XD
wait

try this
remove those extra braces u put after the class declaration and the last bracket