import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		int kekka=0;
		char[] aa=new char[4];
		String bb="";
		bb=sc.next();
		for(int i=0; i<4; i++) {
			aa[i]=bb.charAt(i);
		}

		for(int i=0; i<4; i++) {
			if(aa[i]=='+') {
				kekka++;
			}
			else if(aa[i]=='-') {
				kekka--;
			}
		}

		System.out.println(kekka);
	}
}
/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