import java.util.Scanner;

public class Main {

	public static void main(String[] args) {


		Scanner scanner = new Scanner(System.in);

		String temp = scanner.nextLine();
		String[] list = new String[4];
		int s = 0;
		for(int i = 0; i < 4;i++) {
			list[i] = String.valueOf(temp.charAt(i));
			if(list[i].equals("+")) {
				s++;
			}else {
				s--;
			}
		}
		System.out.println(s);
	}
}
/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