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 s[100];
int main() {
  scanf("%s", s);
  int len = strlen(s);
  bool flag = true;
  s[len] = '0' - 1;
  int last = 0;
  long long ans = 0ll;
  for (int i = 0; i <= len; i++) {
    int x = s[i] - '0';
    if (x < 0) {
      if (flag)
        ans += last;
      else
        ans -= last;
      last = 0;
    }
    if (s[i] == '-') {
      last = -3;
      flag = false;
    } else if (s[i] == '+') {
      last = -5;
      flag = true;
    } else {
      last = last * 10 + x;
    }
  }
  printf("%I64d\n", ans);
  return 0;
}