why this code is not correct?
s = summ(v)
>> b=s
>> s(1)=[]
>> c=[[s],0]
>> s=[b+c]
>> s(end)=[]
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.
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