import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		int ans = 0;
		for(int i = 0 ; i < 4 ; i++) {
			if(s.charAt(i) == '+') ans++;
			else ans--;
		}
		System.out.println(ans);
	}
}
