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 c[1010];
int n, as, nw;
int main() {
  int i, j;
  scanf("%d%s", &as, c);
  n = strlen(c);
  for (i = 0; i < n;) {
    nw = c[i] - '0';
    j = i + 1;
    while (isdigit(c[j])) nw = nw * 10 + c[j] - '0', ++j;
    if (c[i] == '+')
      as += nw;
    else
      as -= nw;
    i = j;
  }
  cout << as;
  return 0;
}