class Main {
	public static void main(String[] args){
		String S = new java.util.Scanner(System.in).nextLine();
		String[] Schar = S.split("");
		int N = 0;
		for (int i = 0; i < 4; i++) {
			if (Schar[i].equals("+")) {
				N++;
			} else {
				N--;
			}
		}
		System.out.println(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