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 mod = 1e9 + 7;
const int maxn = 1e3 + 3;
const int inf = 0x3f3f3f3f;
const long long linf = 0x3f3f3f3f3f3f3f3f;
const int dx[4] = {0, 0, 1, -1};
const int dy[4] = {1, -1, 0, 0};
int main() {
  string s;
  int f = 1, t = 0, ans = 0;
  cin >> s;
  for (int i = 0; i <= s.length(); i++) {
    char c = s[i];
    if (!isdigit(c)) {
      ans += f * t;
      if (c == '+')
        f = 1;
      else
        f = -1;
      t = 0;
    }
    t = t * 10 + c - '0';
  }
  printf("%d\n", ans);
  return 0;
}