import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        byte count = 0;
        Scanner sc = new Scanner(System.in);
        String inputString = sc.nextLine();
        if(inputString.charAt(0) == '+'){
            count++;
        } else{
            count--;
        }
        if(inputString.charAt(1) == '+'){
            count++;
        } else{
            count--;
        }
        if(inputString.charAt(2) == '+'){
            count++;
        } else{
            count--;
        }
        if(inputString.charAt(3) == '+'){
            count++;
        } else{
            count--;
        }
        System.out.println(count);
    }
}
/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