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
Add two numbers
Rotate a Matrix
06 - Matrix Equations 1
Challenging perms function!
Recaman Sequence - III
Calculate trends in time series
Bridge and Torch Problem - Minimum time
Area under standard normal curve
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