Task:

Write a function that takes a vector X and returns the alternating sum of X:

X(1)-X(2)+X(3)-X(4)+...

Example:

for vector X=[1 2 3] the function should return 1-2+3=2.

Solve

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78 Solutions

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Last Solution submitted on May 30, 2026

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Chris Cleveland Riccardo G. Bin Jiang Lorenzo

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