import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = 0;
		String b = stdIn.next();
		char[] a = new char[4];
		for (int j = 0; j < 4; j++) {
			a[j] = b.charAt(j);
		}
		for (int i = 0; i < 4; i++) {
			if (a[i] == '+') 
				N = N + 1;
			else
				N = N - 1;
		}


		System.out.print(N);
	}
}
/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