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;
char str[100];
int main() {
  scanf("%s", str);
  int ans = 0, len = strlen(str), tmp = 0;
  bool flag = true;
  for (int i = 0; i < len; i++) {
    if (str[i] >= '0' && str[i] <= '9') {
      tmp = tmp * 10 + str[i] - '0';
    } else {
      if (flag)
        ans += tmp;
      else
        ans -= tmp;
      if (str[i] == '+')
        flag = true;
      else
        flag = false;
      tmp = 0;
      tmp = tmp * 10 + str[i] - '0';
    }
  }
  if (flag)
    ans += tmp;
  else
    ans -= tmp;
  printf("%d\n", ans);
  return 0;
}