The description of this problem is not very clear. It's really asking for the first and last row for each unique value in the first column.
"However there will be more than one row index and that makes this question challenging." - that really explains nothing to me
Distance walked 1D
Back to basics 6 - Column Vector
Getting the row and column location from a matrix
Create incrementing array
Find the biggest digit in a matrix
Happy Free Wednesday!
Hexagonal numbers on a spiral matrix
Mean = Standard Deviation
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