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;
int l, c, x, f = 1;
inline void write(long long x) {
  if (x < 0) {
    putchar('-');
    x = -x;
  }
  if (x > 9) write(x / 10);
  putchar(x % 10 + '0');
  return;
}
signed main() {
  cin >> s;
  l = s.size();
  for (register int i = 0; i < l; ++i) {
    if (s[i] < '0' || s[i] > '9') {
      c += x * f;
      x = 0;
      if (s[i] == '+') f = 1;
      if (s[i] == '-') f = -1;
      x = x * 10 + (s[i] - '0');
    }
    if (s[i] >= '0' && s[i] <= '9') {
      x *= 10;
      x += (s[i] - '0');
    }
  }
  c += x * f;
  write(c);
  return 0;
}