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 ret = 0, i = 0, factor = 1;
  std::string input = "";
  std::cin >> input;
  while (input[i] != '\0') {
    factor = 1;
    if (input[i] == '-') {
      factor = -1;
    }
    int num = input[i] - '0';
    int j = i + 1;
    while (input[j] != '\0' && (input[j] >= '0' && input[j] <= '9')) {
      num = num * 10 + input[j] - '0';
      j++;
    }
    ret += num * factor;
    i = j;
  }
  std::cout << ret << std::endl;
  return 0;
}