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
Indexed Probability Table
radius of a spherical planet
First N Perfect Squares
Create an 'arrow-head" matrix
Basic arrays operations.
Fill the Matrix - 2
Repeat string n times - 3
Pi Digit Probability
Is there a GPU Device?
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