Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
The Goldbach Conjecture
Duplicate each element of a vector.
Calculate the area of a triangle between three points
Will there be a new leader?
Find a Pythagorean triple
Bridge and Torch Problem - Length of Unique Time List
Delete the rows in the middle
Decrypt a secret message!
Fill the matrix - 1
Lunar Arithmetic (Addition)
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