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 read() {
  char ch = getchar();
  int x = 0, f = 1;
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    x = x * 10 + ch - '0';
    ch = getchar();
  }
  return x * f;
}
char a[100];
int len;
long long res = 0, cur = 0;
int sign = 1;
int main() {
  cin >> a;
  len = strlen(a);
  for (int i = 0; i < len; i++) {
    if (a[i] == '-' || a[i] == '+') {
      res += sign * cur;
      cur = 0;
    }
    if (a[i] == '-') sign = -1;
    if (a[i] == '+') sign = 1;
    cur = cur * 10 + a[i] - '0';
  }
  res += sign * cur;
  printf("%lld", res);
  return 0;
}