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;
bool p = 1;
int co, x;
int main() {
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] >= '0' && s[i] <= '9')
      x = (s[i] - 48) + x * 10;
    else {
      if (p)
        co += x;
      else
        co -= x;
      x = s[i] - 48;
      if (s[i] == '+')
        p = 1;
      else
        p = 0;
    }
  }
  if (p)
    co += x;
  else
    co -= x;
  cout << co;
}