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
Find Index of maximum Value and maximum Value of a vector
Volume difference between Ellipsoid and Sphere
06 - Matrix Equations 2
Matrix rotation as per given angle
Matrix to column conversion
Hexagonal numbers on a spiral matrix
Get Next Combination
Recaman Sequence - I
Write out numbers in words
Create initial basic feasible solution for transportation problems - North-West Corner Method
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