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 x;
  int ans = 0, p, ex = 0, fg;
  cin >> p >> x;
  ans = p;
  x += '+';
  for (int i = 0; i < x.length(); i++) {
    if (x[i] == '+' || x[i] == '-') {
      ans += fg * ex;
      ex = 0;
    }
    if (x[i] == '+')
      fg = 1;
    else if (x[i] == '-')
      fg = -1;
    ex = ex * 10 + x[i] - '0';
  }
  printf("%d\n", ans);
}