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;
const int N = 55;
int main() {
  string s;
  cin >> s;
  int res = 0, x = 0, f = 1;
  for (int i = 0; i < s.size();) {
    char c = s[i];
    if (isdigit(c)) {
      while (isdigit(c)) {
        x = x * 10 + c - '0';
        ++i;
        c = s[i];
      }
      res += f * x;
      if (c == '+')
        f = 1;
      else
        f = -1;
      x = c - '0';
      ++i;
    } else {
      assert(0);
    }
  }
  cout << res << endl;
}