1106 - Parsing A Boolean Expression\.

Hard

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

Constraints:

• <code>1 <= expression.length <= 2 * 10⁴</code>

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

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