import java.util.*;
public class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner (System.in);
    String s = sc.next();
    int n = 0;

    for(int i=0 ; i<4 ; i++){
      if(s.charAt(i)=='+'){
        n++;
      }else if(s.charAt(i)=='-'){
        n--;
      }
    }
    System.out.println(n);
  }
}
