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
Back to basics 15 - classes
sum of non-primes
Compare two input matrices
Dealing with correlation results!
Bridge and Torch Problem - Probability
Is there a GPU Device?
Create initial basic feasible solution for transportation problems - North-West Corner Method
Check if the input is an interprime
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