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;
using lint = long long;
template <typename T>
using vc = std::vector<T>;
bool is_d(char c) { return c >= '0' && c <= '9'; }
void solve(istream& cin, ostream& cout) {
  string s;
  cin >> s;
  int n = s.size();
  int a = 0;
  int i = 0;
  int x = 0;
  while (is_d(s[i])) {
    x = x * 10 + s[i] - '0';
    i++;
  }
  a = x;
  while (i < n) {
    char p = s[i];
    int y = s[i] - '0';
    i++;
    while (i < n && is_d(s[i])) {
      y = y * 10 + s[i] - '0';
      i++;
    }
    if (p == '+') {
      a += y;
    } else {
      a -= y;
    }
  }
  cout << a;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  solve(cin, cout);
  return 0;
}