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#Check #redundant #brackets #codingninjas
Check redundant brackets
For a given expression in the form of a string, find if there exist any redundant brackets or not. It is given that the expression contains only rounded brackets or parenthesis and the input expression will always be balanced.
A pair of the bracket is said to be redundant when a sub-expression is surrounded by unnecessary or needless brackets.
Example:
Expression: (a+b)+c
Since there are no needless brackets, hence, the output must be 'false'.

Expression: ((a+b))
The expression can be reduced to (a+b). Hence the expression has redundant brackets and the output will be 'true'.
Sample Input 1:
a+(b)+c
Sample Output 1:
true
Explanation:
The expression can be reduced to a+b+c. Hence, the brackets are redundant.
Sample Input 2:
(a+b)
Sample Output 2:
false

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