import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.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);
	}

}
