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;
string s;
long long rs, sign = 1, i;
int main() {
  ios_base::sync_with_stdio(false);
  cout.precision(30);
  cout.tie(0);
  cin.tie(0);
  cin >> s;
  s = s;
  while (i < s.size()) {
    long long n = 0;
    do {
      n = n * 10 + s[i] - '0';
      i++;
    } while (i < s.size() && s[i] != '-' && s[i] != '+');
    rs += sign * n;
    sign = s[i] == '-' ? -1 : 1;
  }
  cout << rs;
  return 0;
}