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(int argc, char* argv[]) {
  ios_base::sync_with_stdio(false);
  std::cin.tie(NULL);
  std::cout.tie(NULL);
  ;
  string s;
  getline(cin, s);
  long long int ans = 0, cur = 0;
  int sg = +1;
  for (int i = (0); i < (int((s).size())); i += (1)) {
    if (s[i] == '+' || s[i] == '-') {
      ans += sg * cur;
      cur = 0;
    }
    if (s[i] == '+') sg = +1;
    if (s[i] == '-') sg = -1;
    cur = (cur * 10) + (s[i] - '0');
    if (i == int((s).size()) - 1) {
      ans += sg * cur;
    }
  }
  cout << ans << '\n';
  return 0;
}