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;
        for(int i = 0; i < s.length(); i++){
            if(s.charAt(i) == '+'){
                num++;
            }else{
                if(s.charAt(i) == '-'){
                    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