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 stdin = new Scanner(System.in);
		String s = stdin.next();
		int a=0;
		char[] c;
		c = s.toCharArray();
		for(int i=0;i<4;i++) {
			if(c[i]=='+') {
				a++;
			}else {
				a--;
			}
			
		}
		System.out.println(a);
	}

}

/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