Given a matrix A, calculate the sample standard deviation of only the non-zero elements.
If there are fewer than 2 non-zero elements in the matrix, return 0.
Example:
Input: A = [1 0 3; 0 5 0]
Non-zero elements: [1, 3, 5]
Output: y = 2
Solve

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Last Solution submitted on Aug 15, 2026

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William Christian Schröder Ziyad Al Refaei Kyle

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