import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int num = 0;
        int plus = 0;
        int minus = 0;
        for(int i=0; i<s.length(); i++){
            if(s.charAt(i)=='+'){
                plus++;
            }
        }
        minus = s.length()-plus;
        System.out.println(num+plus-minus);
    }
}
/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