Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
Swap the input arguments
Find the largest value in the 3D matrix
Is A the inverse of B?
Maximum value in a matrix
Van Eck's Sequence's nth member
Write out numbers in words
Homemade: Control Charts
Decrypt a secret message!
Bridge and Torch Problem - Minimum time
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