import java.util.*;

public class Main {

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