Problem 2350. What is Sum Of all elements of Matrix

 Input  x = [ 1 2 0 0 0
              0 6 9 3 3 ]
 Output y is 24.

 Input  x = [ 1 NaN 0 0 0
              0 6 9 3 3 ]
 Output y is NaN.

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Problem Recent Solvers446

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