#include <bits/stdc++.h>
using namespace std;
int main() {
  string S;
  cin >> S;
  int count = 0;
  for (int i = 0; i < S.size(); i++) {
    if (S == "+") {
      count += 1;
    }
    if (S == "-") {
      count -= 1;
    }
  }
  cout << count << endl;
}
