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
The Goldbach Conjecture, Part 2
Better bullseye matrix
Whether the input is vector?
Derivative of polynomial
Low level NaN
Check if the input is a strong prime
Good Morning :)
Recaman Sequence - I
Determine if input is a valid AHP evaluation matrix
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