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() {
  char cad[100];
  int tam, signo = 1;
  long long res = 0, acarreo = 0;
  scanf("%s", cad);
  tam = strlen(cad);
  for (int i = 0; i < tam; i++) {
    if (cad[i] == '-' || cad[i] == '+') {
      res += signo * acarreo;
      acarreo = 0;
    }
    if (cad[i] == '-') signo = -1;
    if (cad[i] == '+') signo = 1;
    acarreo = acarreo * 10 + cad[i] - '0';
  }
  res += signo * acarreo;
  printf("%lld", res);
  return 0;
}