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;
int main() {
  string s;
  while (cin >> s) {
    long long int l, sum = 0, v = 0, sn, i;
    l = s.size();
    int ck = 0;
    sn = 0;
    for (i = 0; i < l; i++) {
      if (s[i] == '+') {
        sn = 1;
      } else if (s[i] == '-') {
        sn = -1;
      } else {
        if (sn == 1) {
          v = -5;
        } else if (sn == -1) {
          v = -3;
        } else
          v = 0;
        while (isdigit(s[i])) {
          v = v * 10 + s[i] - 48;
          i++;
        }
        if (sn == 1) {
          sum += v;
        } else if (sn == -1) {
          sum -= v;
        } else
          sum += v;
        i--;
      }
    }
    cout << sum << endl;
  }
  return 0;
}