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 ans, check = 1, num = 0;
string s;
int32_t main() {
  ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
  long long ans = 0;
  long long check = 1;
  long long num = 0;
  string s;
  cin >> s;
  for (auto i : s) {
    if (i == '-' || i == '+') {
      ans += check * num;
      if (i == '-')
        check = -1;
      else
        check = 1;
      num = 0;
    }
    num = 10 * num + (i - '0');
  }
  ans += check * num;
  cout << ans;
  return 0;
}