import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int n=0;
		for (int i = 0; i < S.length(); i++) {
			if(S.charAt(i)=='+'){
				n=n+1;
			}else{
				n=n-1;
			}
		}
		System.out.println(n);
	}
}