This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer.
Explainer
The recursive insight: split problems into simpler pieces. Sum 3 numbers by adding the 1st to the sum of the next 2. Divide & conquer the work then merge the parts. If you can solve the simplest, and you can make a problem simpler, you can solve anything.
Additional Context
TEAM: @dchaley @lynnlangit
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