import java.util.*;
public class Main {
    public static void main(String[] args) {	
	Main main = new Main();
    	main.solveA();
    }
    
    private void solveA() {
	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);
    }
}