Confirm

Same:
With summary = 53961
Expected
: 13014
to equal
: 13013

Thought as much, but i haven't still gotten the importance of strip

absolutely, I thought a lot, but didn't understand what it used for

Op solved it, closing

The description states

rounded to the nearest whole number.

so using either ceil or floor is not correct

If we don't know the city of a friend, we don't visit that friend

Worse than that, the description seems a bit lacking in this regard. Take the sample case. I went through trying to figure out the best approach to the problem, but solving the sample test on pen and paper and then in ruby, the expected answer doesn't include any distance having to do with A5, the friend in the list that doesn't have a town listed. The total is just the far sides of the triangles summed, plus the distance to the first and last town. So are we visiting every friend in the friends list, or are we only visiting towns we know the distance for, or...?

Mass was conserved and the potatoes weighed less. The air in his kitchen weighed more, though. Now to add in how much water is added by cooking with natural gas vs electric.

Simplified!

Can you please clarify what exactly is difficult? Maybe you've meant too long? I am open to suggestions.

no 'trick'

No harm done:-) Thanks for your last post!

I see that you are very new at CW... and it is your excuse:-)
Why did you think your code is true, that you have weird errors and there are code issues in the tests?
I tried your code and it gives sometimes correct results and sometimes false results... so your code is wrong:-(
Before posting issues and wasting time of some people, look at the top of the page to see how many guys passed the Python kata (7978 for now). When the number is big enough chances are your code is wrong and not the tests.
Have a good day, cheers.