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 gt(char *s) {
  int ret = (int)(*s) - '0';
  ++s;
  while (*s != '+' && *s != '-' && *s != 0) {
    ret = ret * 10 + *s - '0';
    ++s;
  }
  return ret;
}
int go(char *s) {
  if (*s == 0) {
    return 0;
  } else {
    int cur = 0, l = strlen(s);
    cur = gt(s);
    for (int i = 0; i < l; ++i) {
      if (s[i] == '+') {
        cur += gt(s + i);
      } else if (s[i] == '-') {
        cur -= gt(s + i);
      }
    }
    return cur;
  }
}
int main() {
  char s[105];
  scanf("%s", s);
  printf("%d\n", go(s));
}