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;
const int MX = 1e5 + 5;
bool isNum(char ch) { return ch >= '0' && ch <= '9'; }
int toInt(string str) {
  int res = 0;
  for (int i = 0; i < str.length(); ++i) {
    res = res * 10 + str[i] - '0';
  }
  return res;
}
int main() {
  int i, j, k;
  string str;
  cin >> str;
  int res = 0, num = 0, l = str.length();
  char sign = '+';
  string tmp = "";
  for (i = 0; i < l; ++i) {
    if (!isNum(str[i])) {
      sign = str[i];
      tmp += sign;
      continue;
    }
    for (j = i; j < l && isNum(str[j]); ++j) {
      tmp += str[j];
    }
    if (sign == '+')
      res += toInt(tmp);
    else
      res -= toInt(tmp);
    i = j - 1;
    tmp = "";
  }
  cout << res << endl;
}