Problem 44416. Sum of adjacent elements in a vector
Given a vector v, return a vector s containting the sum of every two adjacent elements in the vector.
Every element s(i) contains the sum of v(i) and v(i+1).
Example:
v = [1, 2, 4, 4, 5, 8] s = [3, 6, 8, 9, 13]
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