Evaluate Arithmetic Expression

You are given a string representing a simple arithmetic expression. The expression contains only non-negative integers and two binary operators: + and -. There are no parentheses in the expression.

The expression follows the format:

$$ Expression = Number \; [Operator \; Number]* $$

Your task is to evaluate the expression and output the result as an integer.

For example, the expression 3+5-2 evaluates to 6.

inputFormat

The input consists of a single line containing the arithmetic expression.

Example: 3+5-2

outputFormat

Output a single integer: the result of evaluating the arithmetic expression.

3+5

8