Balanced Paranthesis

Given a string expression, check if brackets present in the expression are balanced or not. Brackets are balanced if the bracket which opens last, closes first.

You need to return true if it is balanced, false otherwise.

Note: This problem was asked in initial rounds in Facebook

Note:- I try to solve this problem using Linked List, python Queue, and List

Sample Input 1 :
{ a + [ b+ (c + d)] + (e + f) }
Sample Output 1 :
Sample Input 2 :
{ a + [ b - c } ]
Sample Output 2 :


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