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