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From: Christian on 14 Oct 2009 20:57
so i'm trying to find the sum of the rings of an array, and return the sums starting with the innermost ring. i also have to use recursion.

for example, if arr =
1 2 3
4 5 6
7 8 9

output = [5 40]

i tried adding up all the numbers on the outside and then manually deleting the outside ring and then moving to the inner ring but i seem to be running into issues. I was just hoping someone could give me a hint towards another way to solve the problem.

thanks,
-chris
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