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 a[100];
int main() {
  scanf("%s", a);
  int s = strlen(a);
  int ans = 0;
  int in;
  for (int k = 0;; k++) {
    if (a[k] == '+' || a[k] == '-') {
      in = k;
      break;
    }
    ans *= 10;
    ans += (a[k] - '0');
  }
  for (int k = in; k < s; k++) {
    int op;
    if (a[k] == '+')
      op = 1;
    else
      op = 2;
    k++;
    int c = 1, tmp = 0;
    while (a[k] != '+' && a[k] != '-') {
      tmp *= 10;
      tmp += a[k] - '0';
      c *= 10;
      k++;
      if (k == s) break;
    }
    k--;
    if (op == 1) {
      ans += tmp;
      ans -= 5 * c;
    } else {
      ans -= tmp;
      ans += 3 * c;
    }
  }
  printf("%d\n", ans);
}