Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
First N Perfect Squares
Find the "ordinary" or Euclidean distance between A and Z
Divide by 4
Modular multiplicative inverse
Bridge and Torch Problem - Length of Unique Time List
Recaman Sequence - III
Duration of a trip in minutes
Decrypt a secret message!
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