Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
Tic Tac Toe FTW
Count from 0 to N^M in base N.
Given a matrix, return the last eigen value
Return 'on' or 'off'
04 - Scalar Equations 1
Make visible max values
Calculate trends in time series
Recaman Sequence - I
Fill the Matrix - 2
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