Solution: Parsing a Boolean Expression
Understand how to parse and evaluate complex nested boolean expressions using a stack-based approach. Learn to process operators like NOT, AND, and OR systematically by scanning characters and applying evaluation rules, enabling you to solve these problems efficiently with linear time complexity.
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Statement
You are given a string, expression, that represents a boolean expression. The expression can take one of the following forms:
't': Represents the boolean value TRUE.'f': Represents the boolean value FALSE.'!(expr)': Represents a NOT operation applied to a subexpressionexpr. It returns the logical negation ofexpr.'&(expr1, expr2, ..., exprN)': Represents an AND operation over one or more subexpressions. It returns TRUE only if all subexpressions evaluate to TRUE. ...