import java.util.*;
public class Main {
  public static void main(String[] args){

    Scanner sc = new Scanner(System.in);
    String S = sc.next();

    String S1 = S.substring(0,1);
    String S2 = S.substring(1,2);
    String S3 = S.substring(2,3);
    String S4 = S.substring(3,4);

    int count = 0;

    if (S1.equals("+")) {
      count++; 
    } else {
      count--; 
    }

    if (S2.equals("+")) {
      count++; 
    } else {
      count--; 
    }

    if (S3.equals("+")) {
      count++; 
    } else {
      count--; 
    }

    if (S4.equals("+")) {
      count++; 
    } else {
      count--; 
    }

    System.out.println(count);

  }
}
/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