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
Are you in or are you out?
Back to basics 1 - Saving
Calculate the area of a triangle between three points
Find the logic
Produce the following matrix
Check if the input is a balanced prime
Repeat string n times - 2
Basic Monte Carlo Simulation
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