import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) {
		String str = null;
		
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
			str = br.readLine();
		} catch (IOException e) {
			return;
		}
		
		int num = 0;
		for (int i = 0; i< 4; i++) {
			if (str.charAt(i) == '+') num++;
			else num--;
		}
		System.out.println(num);
	}
}

/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