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;
string s;
int f = 1, t, ans;
int main() {
  cin >> s;
  for (int i = 0; i <= s.size(); i++) {
    if (s[i] < '0') {
      ans += f * t;
      if (s[i] == '+')
        f = 1;
      else
        f = -1;
      t = 0;
    }
    t = t * 10 + s[i] - '0';
  }
  cout << ans;
  return 0;
}