import java.util.*;

public class Main {

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

}
