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;
inline long long sqr(long long x) { return x * x; }
mt19937 Random((int)time(0));
inline long long rnd(long long x) { return Random() % x; }
const long long INF = (long long)1e9 + 2018;
const long long MOD = (long long)1e9 + 7;
const long double PI = acos(-1.0);
void $main() {
  string s;
  cin >> s;
  s += "+";
  long long res = 0, cur = 0, p = 1;
  for (char c : s) {
    if (c == '+' || c == '-') {
      res += p * cur;
      cur = 0;
    }
    if (c == '+') {
      p = 1;
    }
    if (c == '-') {
      p = -1;
    }
    cur *= 10ll;
    cur += c - '0';
  }
  cout << res;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cout.setf(ios_base::fixed, ios_base::floatfield);
  cout.precision(10);
  $main();
}