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>
int main() {
  int total = 0;
  int current = 0;
  int sign = 1;
  for (;;) {
    int c = getchar();
    if (c == '+' || c == '-') {
      total += current;
      current = 0;
      sign = c == '+' ? 1 : -1;
    } else if (c < '0' || c > '9')
      break;
    current = current * 10 + (c - '0') * sign;
  }
  total += current;
  printf("%d\n", total);
  return 0;
}