the text does not specify the expected order of the rows
It would be helpful if the text gave an example. Also, the test suite should be much richer - only two special cases does not really encourage people to write general solutions.
Based on Paul Berglund's solution (Solution 321219).
Not a great solution, but the test suite needs to be improved.
Find the sum of all the numbers of the input vector
Get the area codes from a list of phone numbers
Magic is simple (for beginners)
02 - Vector Variables 3
Sum of odd numbers in a matrix
Count from 0 to N^M in base N.
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