why this code is not correct?
s = summ(v)
sorry mate, this is unfair for those who actually came up with a compact solution
No need to be sorry.
Personally I think the regexp should be always forbidden.
I used it (and I had never thought about it before) because it seems that everyone is using it.
The Goldbach Conjecture
Basics: 'Find the eigenvalues of given matrix
The sum of the numbers in the vector
Fibonacci-Sum of Squares
Capitilize the first letter of every word in a string
Product of Each Column
Remove the air bubbles from a vector
Vertical matrix sort
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