Question not clear?

#1

You are given an balanced expression. You have to find if it contains duplicate parentheses or not. A set of parentheses are duplicate if same subexpression is surrounded by multiple parenthesis.

#2

You need to check if any subexpression is surrounded by parenthesis multiple times.
For example, a+((b)) here b is surrounded by multiple parenthesis, so ans is Duplicate for this case while ans for a + (b) is Not Duplicate.

#3

2
(((a+(b))+(c+d)))
((a+(b))+(c+d))

Sample Output

Duplicate
Not Duplicates

Explanation

For 1st test case : The subexpression “a+(b)” is surrounded by two pairs of brackets.

how here ??? only one parenthesis is there around a+(b)—>(a+(b))

#4

Yes but the whole expression (a+(b))+(c+d) is surrounded by multiple parenthesis.