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>
char s[100000];
int main() {
  scanf("%s", s);
  int ret = 0;
  for (int i = 0; s[i];) {
    if (i == 0 || s[i] == '-' || s[i] == '+') {
      int v = s[i] - '0', j = i + 1;
      for (j = i + 1; '0' <= s[j] && s[j] <= '9'; ++j) v = v * 10 + s[j] - '0';
      if (i == 0 || s[i] == '+')
        ret += v;
      else
        ret -= v;
      i = j;
    }
  }
  printf("%d\n", ret);
  return 0;
}