'Looks like you've solved it'

Don't use global vars, they keep their values between tests, so your code only works fine when called once. About indentation, use markdown formatting

Use backticks ` instead of single quotes ' and in their onw line.

Like this:

```python

Your code

```

Don't use globals, they keep their values between tests, so your code will only work fine when called once.

Noone can help without seeing your code. If you put it here, put it between 3 backticks (```) and mark the comment as "spoiler".

On the other hand, 22000+ people managed to solve it in python, so you will succeed too :-)