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 main() {
  string a;
  cin >> a;
  int sign = 1, now = 0, sum = 0;
  for (int i = 0; i < a.length(); i++) {
    if (a[i] == '+' || a[i] == '-') {
      sum += now * sign;
      if (a[i] == '+')
        sign = 1;
      else
        sign = -1;
      now = 0;
      now += a[i] - '0';
    } else {
      now *= 10;
      now += a[i] - '0';
    }
  }
  sum += sign * now;
  cout << sum << endl;
  return 0;
}