## Problem Description

An arithmetic expression is defined as a sequence of positive integers, separated by arithmetic operators: +,-,(,). Given an arithmetic expression without parentheses, you are to calculate the minimum possible value for the expression, by adding appropriate parentheses to the expression.

## Input

The input contains several test cases. Each test case is a single line containing a expression.

The expression consists of only positive integers,+,-

Numbers in expression may contain leading zeroes and is within 32bit integer, the total length of the expression will not exceed 100.

## Output

For each case, output an integer representing the minimum value of the expression.

**Sample input**

## Sample Input

00009-00009
10+20+30+40
1-4+6

## Sample Output

0
100
-9

## Source

FOJ月赛-2007年5月