simple and easy

it took me some time until i figured the -1 and -2 to get the second form the last

cool, although it's not as straightforward

i did that throws error had to check for string len 2 or 3

Same! TIL

A quick word of thanks - I actively learned from this. I appreciate all of you who put this answer in and helped make my code better. :)

Perfect!

Beautiful, simple and efficient.

But this code will produce an incorrect answer to arr = [1,1,1]. Or do I understand something wrong?

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Let's not give anyone any stupid ideas, please.

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ooo is good code cafoooo

My friend, we write solutions not tests. The TESTS round answers, not solutions. What are you talking about?

Thank you for this! This is what I wanted to do but didn't know how to do, so had to longhand it. This is very neat, thanks for teaching me