import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        String s;

        Scanner sc = new Scanner(System.in);
        s = sc.nextLine();

        int ans = 0;
        for(int i=0; i<4; i++) {
            if (s.charAt(i) == '+') ans++;
            else ans--;
        }

        System.out.println(ans);
    }
}
/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