import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner in = new java.util.Scanner(System.in);
		String S = in.nextLine();
		//int N = in.nextInt();
		int num = 0;
		for(int i=0; i<4; i++) {
			if(S.substring(i, i+1).equals("+")) {
				num++;
			}else {
				num--;
			}
		}
		System.out.print(num);
		in.close();
		
	}
}
/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