import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int answer = 0;

		for (int i = 0; i < S.length(); i++) {
			if (S.charAt(i) == '+') {
				answer++;
			} else {
				answer--;
			}
		}

		System.out.println(answer);
	}
}
