import java.util.Scanner;

public class Main
{
	public static void main(String[] args)
	{
		int n = 0;
		Scanner s = new Scanner(System.in);
		String l = s.nextLine();
		
		for (int i = 0; i < 4; i++)
		{
			n = l.charAt(i) == '+' ? n + 1 : n - 1;
		}
		s.close();
		System.out.println(n);
	}
}
/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