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.
Return the 3n+1 sequence for n
Increment a number, given its digits
Replace Vector Elements
Concatenate two strings
Remove the first, third and fifth rows of a matrix
Find the starting index of a consecutive condition
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