import java.util.Scanner;

public class Main {

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