import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String S = sc.nextLine();

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

		System.out.println(ans);

	}
}