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;
template <typename _T>
inline void _DBG(const char *s, _T x) {
  cerr << s << " = " << x << "\n";
}
template <typename _T, typename... args>
void _DBG(const char *s, _T x, args... a) {
  while (*s != ',') cerr << *s++;
  cerr << " = " << x << ',';
  _DBG(s + 1, a...);
}
int main() {
  string s;
  cin >> s;
  int sgn = 1, tmp = 0, ans = 0;
  for (int i = 0; i < (int)(s).size(); i++) {
    if (s[i] == '+' || s[i] == '-') ans += tmp * sgn, tmp = 0;
    if (s[i] == '+') sgn = 1;
    if (s[i] == '-') sgn = -1;
    tmp = 10 * tmp + (s[i] - '0');
  }
  ans += tmp * sgn;
  cout << ans << "\n";
  return 0;
}