Evaluate Mathematical Expression

This problem requires you to evaluate a mathematical expression provided as a string. The expression contains non-negative integers and the operators +, -, and *. The standard operator precedence applies, i.e., multiplication has higher precedence than addition and subtraction. Specifically, if the expression is denoted by \(E\), then the evaluation follows:

\( E = \text{number} \; ( ( + | - | * ) \; \text{number} )^* \)

For example, the expression "3+5*2-4" should be evaluated as \(3 + (5 \times 2) - 4 = 9\).

You need to output the computed integer result of the expression.

inputFormat

Input is provided via stdin as a single line string containing the mathematical expression. The expression will consist only of digits and the operators '+', '-', '*'. There are no spaces in the input.

outputFormat

Output a single integer to stdout which is the result of the evaluated expression.## sample

3+5

8