Problem: One very experienced problem writer decided to prepare a problem for April Fools Day contest. The task was very simple - given an arithmetic expression, return the result of evaluating this expression. However, looks like there is a bug in the reference solution...

Input

The only line of input data contains the arithmetic expression. The expression will contain between 2 and 10 operands, separated with arithmetic signs plus and/or minus. Each operand will be an integer between 0 and 255, inclusive.

Output

Reproduce the output of the reference solution, including the bug.

Examples

Input

8-7+6-5+4-3+2-1-0


Output

4


Input

2+2


Output

-46


Input

112-37


Output

375

Solution (in JAVA):

Solution:
import java.util.*;
 
public class twoPlusTwoDoesNotEqualFour {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String s = scanner.nextLine();
		int ans = 0, tmp = 0;
		boolean flg = true;
		for (int i = 0; i < s.length(); i++) {
			if (s.charAt(i) >= '0' && s.charAt(i) <= '9') {
				tmp = tmp * 10 + s.charAt(i) - '0';
			} else {
				if (flg)
					ans += tmp;
				else
					ans -= tmp;
				if (s.charAt(i) == '+')
					flg= true;
				else
					flg = false;
				tmp = 0;
				tmp = tmp * 10 + s.charAt(i) - '0';
			}
		}
		if (flg)
			ans += tmp;
		else
			ans -= tmp;
		System.out.println("" + ans);
	}
}