import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int mind = 0;
		String input = new String();
		input = sc.next();
		for(int i = 0; i < 4; i++) {
			if(String.valueOf(input.charAt(i)).equals("+"))
				mind = mind + 1;
			else
				mind = mind - 1;
		}
		System.out.println(mind);
	}
}

/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