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 = (int)1e9 + 7;
const int N = (int)2e5 + 123;
const long long inf = 3e18 + 1;
const double pi = acos(-1.0);
const double eps = 1e-9;
const int dx[] = {0, 0, 1, 0, -1};
const int dy[] = {0, 1, 0, -1, 0};
string s;
int ans;
inline void boost() {
  ios_base ::sync_with_stdio(NULL);
  cin.tie(NULL), cout.tie(NULL);
}
inline void Solve() {
  boost();
  cin >> s;
  int n = s.size();
  int id = 0;
  int ans = 0;
  while (id < n && isdigit(s[id])) {
    ans *= 10, ans += s[id] - '0';
    id++;
  }
  while (id < n) {
    char p = s[id];
    int y = s[id] - '0';
    id++;
    while (isdigit(s[id]) && id < n) y *= 10, y += s[id] - '0', id++;
    if (p == '+')
      ans += y;
    else
      ans -= y;
  }
  cout << ans;
}
int main() {
  int tt = 1;
  while (tt--) {
    Solve();
  }
  return 0;
}