Brackets all over : Question not clear

#1

I am not able to get the question.
What are “a” and “b” ?
What is m ?
n is the final size of the resultant string.

#2

as per the qn
y are given a string (s)
of size m

now u have to append 2 string (a) and (b) ==> a+s+b and the lenght of resultant string should be equals to n
and it should also satisfies the given 2 conditions.

given test case is like: ((
length(m) =2

we can add
a="" and b="))"
new length(n)=4

#3

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