Taco Expression Evaluation

You are given a single line containing an arithmetic expression. The expression consists of positive integers, the binary operators +, -, and *, and parentheses. Your task is to evaluate the expression following the usual operator precedence rules: multiplication has higher precedence than addition and subtraction, and parentheses can override these rules.

The precedence rules in \( \LaTeX \) are expressed as: \( \times \) has higher precedence than \( + \) and \( - \).

Note: All tokens in the expression are separated by spaces.

inputFormat

The input is given via standard input as a single line containing the arithmetic expression.

Example: 3 * ( 4 + 5 ) - 6

outputFormat

The output is a single integer, which is the result of evaluating the given expression. The output should be printed to standard output.

3 * ( 4 + 5 ) - 6

21