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;
int main(int argc, char *argv[]) {
  int ans = 0;
  char s[1000] = {'\0'};
  scanf("%d%s", &ans, s);
  for (int i = 0; s[i] != '\0';) {
    int num = s[i] - '0';
    int j = i + 1;
    for (; s[j] - '0' >= 0; j++) {
      num = 10 * num + s[j] - '0';
    }
    if (s[i] == '+') {
      ans += num;
    } else {
      ans -= num;
    }
    i = j;
  }
  cout << ans << endl;
  return 0;
}