I was pretty confused why many are using bitwise here, not the arithemetic operators like i did. Now Its pretty clear to me.
So, Thank you!

i completely rewrote the kata

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Approved! thanks

Thank you!

Thanks :)

Approved.

It's already the case: If present in the list, number 0 will be neutral, hence not fight for either side.

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Approved by someone.

Approved by someone.