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 str;
  cin >> str;
  str += "+";
  int sign = 1;
  int res = 0;
  int cur = 0;
  for (char c : str) {
    if (c == '+' || c == '-') {
      res += sign * cur;
      cur = 0;
    }
    if (c == '-') {
      sign = -1;
    }
    if (c == '+') {
      sign = 1;
    }
    cur = cur * 10 + (c - '0');
  }
  cout << res << "\n";
  return 0;
}