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[100];
int a;
int main() {
  scanf("%d%s", &a, s);
  for (int i = 0; i < strlen(s);) {
    int j = i + 1;
    int t = s[i] - '0';
    while (isdigit(s[j])) {
      t = t * 10 + s[j] - '0';
      j++;
    }
    if (s[i] == '+')
      a += t;
    else
      a -= t;
    i = j;
  }
  printf("%d\n", a);
  return 0;
}