import java.util.Scanner;

public class Main{
	public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    String s=sc.next();
      if(s.equals("++++")){
       System.out.println(4);
      }
      else if(s.equals("+++-") || s.equals("++-+") || s.equals("+-++")|| s.equals("-+++")){
      System.out.println(2);
      }
      else if(s.equals("+---") || s.equals("-+--") || s.equals("--+-")|| s.equals("---+")){
      System.out.println(-2);
      }
      else if(s.equals("----")){
       System.out.println(-4);
      }
      else{
      System.out.println(0);
      }
      
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz