import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        int t = 0;
        for(int i = 0; i < 4; i++){
            if(s.charAt(i) == '+')t++;
            else if(s.charAt(i) == '-')t--;
        }
        System.out.println(t);
    }
}

/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