import java.util.*;

public class Main{
  public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    String s=sc.next();
    int ans=0;
    for (int i=0;i<4;i++) {
      if (s.charAt(i)=='+') {
        ans++;
      }else{
        ans--;
      }
    }

    System.out.println(ans);
  }
}
