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 a list sorted by number of occurrences
Longest run of consecutive numbers
Sum the 'edge' values of a matrix
Find the largest number
Capitilize the first letter of every word in a string
How many Integers?
Approximate the cosine function
Remove the first, third and fifth rows of a matrix
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