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.
Sum all integers from 1 to 2^n
Project Euler: Problem 1, Multiples of 3 and 5
Basics: 'Find the eigenvalues of given matrix
Find the hypotenuse
Side of an equilateral triangle
Remove the first, third and fifth rows of a matrix
Find the average of a random sequance
Find the starting index of a consecutive condition
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