#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int c;
  int q;
  q = 0;
  c = s.size();
  for (int i = 0; i <= c; i++) {
    if (s[i] == '+') {
      q = q + 1;
    } else {
      q = q - 1;
    }
  }
  cout << q << endl;
  return 0;
}
