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 s[1003], ch;
  int ans = 0, nr = 0, ls = 0, i = 0;
  int sign = 1;
  cin.getline(s, 1000);
  ls = strlen(s);
  while (i < ls) {
    ch = s[i];
    if (ch == '-') {
      ans += nr * sign;
      sign = -1;
      nr = '-' - '0';
    } else if (ch == '+') {
      ans += nr * sign;
      sign = 1;
      nr = '+' - '0';
    } else {
      nr = nr * 10 + ch - '0';
    }
    i++;
  }
  ans += nr * sign;
  cout << ans;
}