Practice Parsing A Boolean Expression
Read the task, work through the examples, and check your approach against the constraints. Use the original LeetCode task for coding and submissions.
Problem Statement
Evaluate the valid expression and return its boolean result. t means true and f means false. !(e) negates one expression. &(e1,e2,...) computes AND of one or more comma-separated expressions, and |(e1,e2,...) computes OR. Expressions may nest within these forms.
Source: Parsing A Boolean Expression on LeetCode. Use the original task for its coding environment and submissions.
Examples
# Example 1
Input
expression = "&(|(f))"
Output
false
# Example 2
Input
expression = "|(f,f,f,t)"
Output
true
# Example 3
Input
expression = "!(&(f,t))"
Output
true
Constraints
1 <= expression.length <= 2 * 10^4
expression[i] is one following characters: '(', ')', '&', '|', '!', 't', 'f', and ','.
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