Solution: Parsing a Boolean Expression
Understand how to parse and evaluate complex boolean expressions by implementing a stack-based algorithm. This lesson teaches you to handle nested logical operators like AND, OR, and NOT efficiently, enabling you to solve coding interview problems involving boolean expression evaluation with linear time and space complexity.
We'll cover the following...
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.'|(expr1, expr2, ..., exprN)': Represents an OR operation over one or more subexpressions. It returns TRUE if at least one of the subexpressions evaluates to TRUE.
Your task is to parse this expression and return its boolean evaluation result.
Note: The input expression is guaranteed to always be valid and strictly adhere to the specified format and rules.
Constraints:
...