import java.util.*;

public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    char[] a = S.toCharArray();
    ArrayList<Character> aa = new ArrayList<>();

	  int ans =0;
      for(int i=0; i<4; i++){
	  if(a[i] == ('+')){
  	   ans++;
      }else{
       ans--;
      }
      }
      System.out.println(ans);
}
}
/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