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>
char buffer[1000];
int main() {
  std::scanf("%s", buffer);
  char* p = buffer;
  int ans = 0;
  while (*p) {
    int cur = 0;
    bool sign = false;
    if (p != buffer) {
      sign = *p == '-';
      cur = *p - '0';
      ++p;
    }
    do cur = cur * 10 + (*p - '0'), ++p;
    while (*p >= '0' && *p <= '9');
    if (sign)
      ans -= cur;
    else
      ans += cur;
  }
  std::printf("%d\n", ans);
}