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 t;
  int sum = 0;
  cin >> t;
  for (int i = t.size() - 1; i >= 0; i--) {
    int flag = i, temp = 0, tt = 1;
    while (i >= 0 && t[i] != '+' && t[i] != '-') {
      temp += ((t[i] - '0') * tt);
      tt *= 10;
      i--;
    }
    if (t[i] == '+' || t[i] == '-') {
      if (t[i] == '+')
        temp -= (5 * tt);
      else {
        temp = -temp;
        temp += 3 * tt;
      }
    }
    sum += temp;
  }
  cout << sum;
  return 0;
}