import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		partA101();
	}


	public static void partA101() {
		Scanner scA = new Scanner(System.in);
		String S = scA.next();
		int count = 0;

		for(int i = 0 ; i < 4 ; i++) {
			if(S.charAt(i) == '+') {
				count++;
			}else if(S.charAt(i) == '-') {
				count--;
			}
		}

		System.out.println(count);

	}
}
/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