#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  long long int i, count = 0;
  string s;
  cin >> s;
  for (i = 0; i < s.size(); i++) {
    if (s[i] == '-')
      count--;
    else
      count++;
  }
  cout << count << "\n";
}
