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;
long long gcd(long long a, long long b) { return b == 0 ? a : gcd(b, a % b); }
const int MAXLEN = 1000;
char s[MAXLEN + 1];
int slen;
void run() {
  scanf("%s", s);
  slen = strlen(s);
  int ret = 0, cur = 0, sign = +1;
  for (int i = (0); i < (slen); ++i) {
    if (!isdigit(s[i]))
      ret = ret + sign * cur, cur = 0, sign = s[i] == '+' ? +1 : -1;
    cur = 10 * cur + s[i] - '0';
  }
  ret = ret + sign * cur;
  printf("%d\n", ret);
}
int main() {
  run();
  return 0;
}