import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		S = S.replaceAll("-","");
		if(S.equals(""))System.out.println("-4");
		if(S.equals("+"))System.out.println("-2");
		if(S.equals("++"))System.out.println("0");
		if(S.equals("+++"))System.out.println("2");
		if(S.equals("++++"))System.out.println("4");
	}
}
/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