Redundant Braces
Write a program to validate if the input string has redundant braces?
Return 0/1
0 -> NO
1 -> YES
Input will be always a valid expression
and operators allowed are only + , * , - , /
Example:
((a + b)) has redundant braces so answer will be 1
(a + (a + b)) doesn't have have any redundant braces so answer will be 0
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