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 state names that end with the letter A
Implement a ROT13 cipher
Counting in Finnish
04 - Scalar Equations 2
Beginner's Problem - Squaring
Number of Even Elements in Fibonacci Sequence
Your favourite city!
Bridge and Torch Problem - Length of Unique Time List
Repeat string n times
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