blokhead,
This answer agrees with mine. The difference is that I actually iterate over the solutions which I am not sure your code could do in the 72 minutes it takes mine to run :P

Cheers - L~R

Update: This node was updated several times to address an implicit casting bug in my C code which truncated my answer.

In reply to Re^2: Challenge: Number of unique ways to reach target sum by Limbic~Region
in thread Challenge: Number of unique ways to reach target sum by Limbic~Region

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