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 n;
long long ans = 0, num;
int op;
int main() {
  string s;
  cin >> s;
  for (auto x : s) {
    if (x == '+' || x == '-') {
      if (op)
        ans -= num;
      else
        ans += num;
      if (x == '-')
        op = 1;
      else
        op = 0;
      num = x - '0';
      continue;
    }
    num = num * 10 + x - '0';
  }
  if (op)
    ans -= num;
  else
    ans += num;
  cout << ans;
}