• Home
• com.github.javadev
• leetcode-in-java
• 1.17
• source code
• readme.md

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

g1101_1200.s1106_parsing_a_boolean_expression.readme.md Maven / Gradle / Ivy

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:**

*   1 <= expression.length <= 2 * 104
*   `expression[i]` consists of characters in `{'(', ')', '&', '|', '!', 't', 'f', ','}`.
*   `expression` is a valid expression representing a boolean, as given in the description.