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;
const long long inf = 1e9 + 1e7;
const long long INF = 1e18 + 1e9;
string s;
long long n, x, f, Ans;
signed main() {
  cin >> s;
  n = s.length(), f = 1;
  for (long long i = 0; i < n; i++) {
    if (s[i] < 48) {
      Ans += x * f, x = (s[i] - 48);
      f = (s[i] == '-' ? -1 : 1);
    } else
      x = x * 10 + (s[i] ^ 48);
  }
  printf("%lld\n", Ans + x * f);
  return 0;
}