import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		String S = scanner.next();
		scanner.close();
		int plus = 0, minus = 0;

		for (int n = 0; n < S.length(); n++) {
			String s = S.substring(n, n + 1);
			if (s.equals("+")) {
				plus++;
			} else if (s.equals("-")) {
				minus++;
			}
		}
		int A = plus - minus;
		System.out.println(A);
	}
}
/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