#include <bits/stdc++.h>
using namespace std;
int main() {
  string S;
  cin >> S;
  int ans = 0;
  for (int i = 0; i < 4; i++) {
    if (S[i] == '+') {
      ans++;
    } else if (S[i] == '-') {
      ans--;
    }
  }
}
