Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
Find the sum of the elements in the "second" diagonal
Make a random, non-repeating vector.
05 - Vector Equations 3
Compare two input matrices
Repeat string n times - 3
'5*3' copy character 3 - five times
Cryptography with A Square Matrix : Decoding
Lunar Arithmetic (Addition)
Recaman Sequence - II
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