1106. Parsing A Boolean Expression

https://leetcode.com/problems/parsing-a-boolean-expression

Description

Return the result of evaluating a given boolean expression, represented as a string.

An expression can either be:

• "t", evaluating to True;

• "f", evaluating to False;

• "!(expr)", evaluating to the logical NOT of the inner expression expr;

• "&(expr1,expr2,...)", evaluating to the logical AND of 2 or more inner expressions expr1, expr2, ...;

• "|(expr1,expr2,...)", evaluating to the logical OR of 2 or more inner expressions expr1, expr2, ...

Example 1:

**Input:** expression = "!(f)"
**Output:** true

Example 2:

**Input:** expression = "|(f,t)"
**Output:** true

Example 3:

**Input:** expression = "&(t,f)"
**Output:** false

Example 4:

**Input:** expression = "|(&(t,f,t),!(t))"
**Output:** false

Constraints:

• 1 <= expression.length <= 20000

• expression[i] consists of characters in {'(', ')', '&', '|', '!', 't', 'f', ','}.

• expression is a valid expression representing a boolean, as given in the description.

ac