Evaluate Expression

You are given a mathematical expression as a string consisting only of non-negative integers and the operators '+' and '*'. The expression does not contain any spaces. In this expression, multiplication has higher precedence than addition.

Your task is to evaluate the expression correctly without using any built-in evaluation functions. For example, given the expression 3+5*2, you should first calculate 5*2 = 10 and then add 3 to obtain 13.

In mathematical terms, if the expression is given by:

$$ E = a_1 + a_2* a_3 + a_4* a_5 * a_6 + \cdots, $$

you must compute the result by applying multiplication before addition.

inputFormat

The input consists of a single line containing the expression. The expression includes only digits (0-9) and the operators '+' and '*'.

Example: 3+5*2

outputFormat

Output a single integer which is the evaluated result of the expression.

Example: For the input 3+5*2, the output should be 13.

## sample

3+5*2

13