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 s;
  cin >> s;
  int flag = 0;
  int cur = 0;
  int ans = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] >= '0' && s[i] <= '9') {
      cur = cur * 10 + (s[i] - '0');
    } else {
      if (!flag) {
        ans += cur;
      } else {
        ans -= cur;
      }
      cur = s[i] - '0';
      if (s[i] == '+') {
        flag = 0;
      } else {
        flag = 1;
      }
    }
  }
  if (!flag)
    ans += cur;
  else
    ans -= cur;
  cout << ans << endl;
}