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() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  string s;
  cin >> s;
  long long ans = 0, n = s.length(), i, j, k, x, sign;
  for (i = 0; i < n; i++) {
    if (s[i] == '+') {
      x = '+' - '0';
      i++;
      sign = 1;
    } else if (s[i] == '-') {
      x = '-' - '0';
      i++;
      sign = -1;
    } else {
      x = 0;
      sign = 1;
    }
    for (j = i; (j < n) && (s[j] != '+') && (s[j] != '-'); j++) {
      x = x * 10 + s[j] - '0';
    }
    ans += sign * x;
    i = j - 1;
  }
  cout << ans << "\n";
  return 0;
}