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.
Back to basics 19 - character types
Sum of diagonal of a square matrix
Add a row of zeros on top of a matrix
Summation of array
How many unique Pythagorean triples?
Find the largest number
Product of Each Column
Sum of Two Numbers
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