import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String S = sc.next();

		int count1 = 0;
		int count2 = 0;

		for (int i = 0; i <=3; i++) {
			if ( S.charAt(i) == '+') {
				count1 ++;
			} else {
				count2 ++;
			}
		}
		System.out.println( (1*count1) + (-1*count2) );
	}
}
/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