import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String S = sc.next();
		String haco;
		int image = 0;

		if(S.length() != 4) {
			// ここでおしまい
		}else {
			for(int i = 0; i < 4; i++) {
				haco = S.substring(i, i+1);
				if(haco.equals("+")) {
					image++;
				}else if(haco.equals("-")) {
					image--;
				}else {
					// なにもしない
				}
			}
			System.out.println(image);
		}
	}
}
/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