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;
char s[10005];
int main() {
  scanf("%s", s);
  int t = 1, n = 0, ans = 0;
  for (int i = 0; s[i] != '\0'; i++) {
    if ('0' <= s[i] && s[i] <= '9')
      n = n * 10 + s[i] - '0';
    else {
      n *= t;
      ans += n;
      n = 0;
      t = -(s[i] - '0') - 4;
      n = s[i] - '0';
    }
  }
  ans += n * t;
  printf("%d", ans);
}