The problem title and description have been improved.
What should the behavior be when a certain value occurs three times or more in vector A? For example, when A = [2 5 3 4 2 1 3 2] (which is the same as the A in the problem description, but with another '2' added to the end), should matrix B list [5 4 2 1 3] before [5 3 4 1 2], or after?
if x is not continuous, the result will be not true
Back to basics 10 - Max Float
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Create a vector whose elements depend on the previous element
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Extract part elements of matrix into one new matrix
Create a fixed format text output
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