#include <bits/stdc++.h>
using namespace std;
int main() {
  char c[4];
  int sum = 0;
  cin >> c;
  int len = strlen(c);
  for (int i = 0; i < len; i++) {
    if (c[i] == '+') {
      sum++;
    } else if (c[i] == '-') {
      sum--;
    }
  }
  cout << sum << endl;
}
