Solution: Parsing a Boolean Expression
Explore how to parse and evaluate complex boolean expressions using a stack approach. Understand how to handle nested AND, OR, and NOT operations by processing subexpressions inside parentheses step by step. This lesson teaches you a linear time algorithm to transform a boolean expression string into its correct boolean result while managing space effectively.
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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. ...