Solution: Parsing a Boolean Expression
Explore how to parse a boolean expression string and evaluate it using a stack-based approach. Understand handling NOT, AND, and OR operators with nested expressions. This lesson helps you implement an algorithm that processes expressions in linear time and space, preparing you to solve similar problems involving stack operations.
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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. ...