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;
char c, s[11111];
int n, ans, now;
int main() {
  scanf("%s", s);
  n = strlen(s);
  int fl = 1;
  for (int i = 0; i < n; ++i) {
    if (!isdigit(s[i])) {
      ans += now * fl;
      now = 0;
      if (s[i] == '+') {
        fl = 1;
      } else {
        fl = -1;
      }
    }
    now = now * 10 + (s[i] - '0');
  }
  ans += now * fl;
  printf("%d\n", ans);
  return 0;
}