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 n = 0, cur = 0;
  char c, op = '+';
  while (std::cin >> c) {
    if ('0' <= c && c <= '9') {
      cur = cur * 10 + (c - '0');
    } else {
      if (op == '+') {
        n += cur;
      } else {
        n -= cur;
      }
      op = c;
      cur = (c - '0');
    }
  }
  if (op == '+') {
    n += cur;
  } else {
    n -= cur;
  }
  std::cout << n << '\n';
  return 0;
}