That's not quite true. If the multiline flag is not set, $ matches the end of the string or the position before a trailing newline.

> pattern = re.compile(r'\w+$')
> pattern.match('foo')
<re.Match object; span=(0, 3), match='foo'>
> pattern.match('foobar\n')
<re.Match object; span=(0, 6), match='foobar'>
> pattern.match('foo\nbar')
None

It's a common problem with python and bigger numbers
using integer division gets rid of it, // instead of /

what is the right data format? I know my logic is correct but it fails for n > 60

How did you handle it?