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;
long long n, x, ans, b;
string a;
int main() {
  cin >> a;
  n = a.size();
  b = 1;
  for (int i = 0; i < n; i++) {
    if (a[i] == '-') {
      ans += b * x;
      b = -1;
      x = 0;
    } else if (a[i] == '+') {
      ans += b * x;
      b = 1;
      x = 0;
    }
    x *= 10;
    x += (a[i] - '0');
  }
  ans += b * x;
  cout << ans << endl;
  return 0;
}