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;
const int N = 1e5 + 5;
int a[N], b[N] = {1};
signed main() {
  static int t;
  static string st;
  getline(cin, st);
  for (int i = 0; i < st.size(); i++) {
    if (st[i] >= '0' && st[i] <= '9')
      a[t] = a[t] * 10 + st[i] - 48;
    else {
      ++t;
      switch (st[i]) {
        case '+':
          a[t] = -5;
          b[t] = 1;
          break;
        case '-':
          a[t] = -3;
          b[t] = -1;
          break;
      }
    }
  }
  static int res;
  for (int i = 0; i <= t; i++) res += a[i] * b[i];
  cout << res;
  return 0;
}