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;
string str;
int getNum(string& str) {
  int num = 0;
  do {
    num = num * 10 + str[0] - '0';
    str = str.substr(1);
  } while (str.length() > 0 && str[0] >= '0' && str[0] <= '9');
  return num;
}
int evaluate(string& str) {
  int sign = 1;
  int ret = getNum(str), num;
  while (str.length() > 0) {
    if (str[0] == '+')
      sign = 1;
    else if (str[0] == '-')
      sign = -1;
    num = getNum(str);
    ret += sign * num;
  }
  return ret;
}
int main() {
  cin >> str;
  cout << evaluate(str);
  return 0;
}