import java.util.Scanner;

public class Main {

	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		int answer = 0;
	    String S = sc.next();

		for(int i=0; i<4; i++){
			if(S.substring(i,i+1).equals("+")) answer++;
			if(S.substring(i,i+1).equals("-")) answer--;
		}
		
		

		sc.close();

	    System.out.println(answer);
    }
}

/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