import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		char s[] = new char[4];
		int think = 0;
		for(int i = 0; i < 4; i++) {
			s[i] = S.charAt(i);
			if(s[i] == '+')think++;
			else if(s[i] == '-')think--;

		}
		System.out.println(think);

	}

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz