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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
int res;
char s[10086];
int main() {
  scanf("%s", s);
  for (int i = 0, cur = 0, f = 1;; i++) {
    if (s[i] == '+' || s[i] == '-' || !s[i]) {
      res += cur * f;
      if (!s[i]) break;
      cur = s[i] - '0';
      f = s[i] == '+' ? 1 : -1;
    } else
      cur = cur * 10 + s[i] - '0';
  }
  printf("%d\n", res);
  return 0;
}