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

        if(s.charAt(0)=='+'){
            sum++;
        }else{
            sum--;
        }

        if(s.charAt(1)=='+'){
            sum++;
        }else{
            sum--;
        }

        if(s.charAt(2)=='+'){
            sum++;
        }else{
            sum--;
        }

        if(s.charAt(3)=='+'){
            sum++;
        }else{
            sum--;
        }
    System.out.println(sum);

    }

}

/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