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 the sum of the elements in the "second" diagonal
How long is the longest prime diagonal?
Are all the three given point in the same line?
02 - Vector Variables 5
Recaman Sequence - II
Basic Monte Carlo Simulation
Is there a GPU Device?
String permutations on phone keyboard
Calculate trends in time series
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