Not sure what you mean by this. I haven't seen a single solution that uses .count().

Is there a simple we can avoid using chars().count()?

You could have simplified by matching '('|'{'|'[' because those code branches are all the same.

Thank you a lot, now it is clear to me. :)

yeah i agree

The time is always the same anyway.

this is fine but a note has been put down there that the maximum height recorded is not necessarily the maximum height reached(as we are checking for every 10th of a second only, not for more smaller fractions), but this code violates this note, it takes the maximum height reached into consideration,

Thanks!

When I authored the kata there was no problem, something has been changed in the CW version hence the tabs bug.
I re-edited the kata and it should work now.
Thanks for your post!