Sum the same indexed (unique) rows. Examine the test suite.
Related Challenge - Problem 2172. Delete the rows in the middle
Find the numeric mean of the prime numbers in a matrix.
Check to see if a Sudoku Puzzle is Solved
How many trades represent all the profit?
Doubling elements in a vector
Repeat string n times - 3
Divide elements by sum of elements
replace nan values iteratively.
'5*3' copy character 3 - five times
Decrypt a secret message!
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