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 <class A>
void addlog(A a) {
  cerr << a << endl;
}
template <class A, class... B>
void addlog(A a, B... b) {
  cerr << a << ' ';
  addlog(b...);
}
char c;
int sum = 0, cur = 0;
int sign = +1;
int main() {
  while (cin >> c) {
    if (c == '+' || c == '-') {
      sum += cur;
      cur = 0;
      if (c == '+') sign = +1;
      if (c == '-') sign = -1;
    }
    cur = 10 * cur + sign * (c - '0');
  }
  cout << sum + cur << endl;
  return 0;
}