Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
Return the 3n+1 sequence for n
Angle between two vectors
Make a run-length companion vector
Wrapping the Tower of Pisa
Matrix to column conversion
Calculate trends in time series
Bridge and Torch Problem - Length of Unique Time List
Fill the matrix - 1
Is there a GPU Device?
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