import java.util.*;
 
public class Main {
  public static void main(String args[]) {
      Scanner sc = new Scanner(System.in);
      String s = sc.nextLine();
      int ans = 0;
      for(int i = 0; i < 4; i++) {
          String next = String.valueOf(s.charAt(i));
          if(next.equals("+")) {
               ans = ans + 1;
          } else if(next.equals("-")) {
               ans = ans -1;
         }
      }
      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