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>
char str[1000];
int main() {
  scanf("%s", str);
  int cur = 0, sign = 1;
  long long result = 0;
  for (int i = 0; i < strlen(str); ++i) {
    if (str[i] == '+') {
      result += sign * cur;
      sign = 1;
      cur = 0;
    } else if (str[i] == '-') {
      result += sign * cur;
      sign = -1;
      cur = 0;
    }
    cur = 10 * cur + str[i] - '0';
  }
  result += sign * cur;
  printf("%lld\n", result);
  return 0;
}